PRODUCT FAMILY DATA SHEET
XLamp® CXB2540 LED
PRODUCT DESCRIPTION
FEATURES
TABLE OF CONTENTS
The XLamp® CXB2540 LED Array is a
• 19-mm optical source
Characteristics................................................ 2
member of the second generation of the • Mechanical and optical design
Operating Limits.............................................. 2
CXA family that delivers up to 30% higher
consistent with other CXA25 and
Flux Characteristics, EasyWhite® Order
efficacy and up to 20% higher lumens than
CXB25 LEDs
Codes and Bins............................................... 3
the first generation in the same LES. The • Available in 70-, 80-, 90- and
Flux Characteristics, Premium Color Order
higher performance second generation
Codes and Bins............................................... 6
CXA
LED
Arrays
provide
a
95-minimum CRI options
drop-in • EasyWhite 2-, 3‑ and 5-step binning
®
Relative Spectral Power Distribution............. 7
performance upgrade to existing CXA LED • Premium Color 2- and 3-step binning
Relative Spectral Power Distribution,
designs to shorten product development • Forward voltage option: 36‑V class
Premium Color................................................ 7
time. In addition, the CXB LEDs also • 85 °C binning and characterization
Electrical Characteristics................................ 8
allow lighting manufacturers to achieve • Extremely uniform color over viewing
Relative Luminous Flux................................... 9
the same or better performance with a
Typical Spatial Distribution........................... 10
angle
smaller LES, enabling a smaller, more • Top-side solder connections
Performance Groups - Brightness............... 10
impactful luminaire. Available in 2‑step, • Thermocouple attach point
Performance Groups - Chromaticity............ 11
3‑step and 5‑step EasyWhite
Premium Color Performance Groups -
®
bins and • NEMA SSL-3 2011 standard flux bins
2‑step and 3‑step Premium Color bins, the • RoHS and REACh compliant
Chromaticity.................................................. 12
CXB2540 LED delivers high lumen output
EasyWhite® Bins Plotted on the 1931 CIE
• UL® recognized component (E349212)
and high efficacy in a single, easy‑to‑use
Color Space................................................... 13
package that eliminates the need for reflow
Premium Color Bins Plotted on the 1931
soldering.
CIE Color Space............................................ 14
Bin and Order Code Formats........................ 16
The CX Family LED Design Guide provides
Mechanical Dimensions............................... 16
basic information on the requirements
Thermal Design............................................. 17
to use the CXB2540 LED successfully in
Notes............................................................. 18
luminaire designs.
Packaging...................................................... 19
Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 / www.cree-led.com
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
CHARACTERISTICS
Characteristics
Unit
Viewing angle (FWHM)
Minimum
Typical
degrees
ESD withstand voltage (HBM per Mil-Std-883D)
Maximum
115
V
8000
DC forward current
mA
2100*
Reverse current
mA
0.1
Forward voltage (@ 1100 mA, Tj = 85 °C)
*
V
34.1
38
Refer to the Operating Limits section.
OPERATING LIMITS
The maximum current rating of the CXB2540 depends on the case temperature (Tc) when the LED has reached thermal equilibrium under
steady-state operation. The graph shown below assumes that the system design employs good thermal management (thermal interface
material and heat sink) and may vary when poor thermal management is employed. Please refer to the Mechanical Dimensions section
on page 16 for the location of the Tc measurement point.
Another important factor in good thermal management is the temperature of the Light Emitting Surface (LES). Cree LED recommends a
maximum LES temperature of 135 °C to ensure optimal LED lifetime. Please refer to the Thermal Design section on page 17 for more
information on LES temperature measurement.
CXB2540 - Standard
2400
85 °C, 2100 mA
2100
1800
If (mA)
1500
1200
900
125 °C,
808 mA
600
300
0
0
25
50
75
100
125
150
Case Temperature (°C)
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF = 1100 mA, TJ = 85 °C)
The following table provides order codes for XLamp CXB2540 LEDs. For a complete description of the order code nomenclature, please
see the Bin and Order Code Formats section (page 16).
CRI*
Nominal
CCT
Min
70
Minimum Luminous Flux
Typ
---
2-Step
3-Step
5-Step
Group
Flux (lm)
@ 85 °C
Flux
(lm) @
25 °C**
W4
5225
5784
X2
5590
6188
X4
6010
6653
CXB2540-0000000N0BX465E
W4
5225
5784
CXB2540-0000000N0HW465E
X2
5590
6188
X4
6010
6653
CXB2540-0000000N0HX465E
W4
5225
5784
CXB2540-0000000N0BW457E
X2
5590
6188
X4
6010
6653
CXB2540-0000000N0BX457E
W4
5225
5784
CXB2540-0000000N0HW457E
X2
5590
6188
X4
6010
6653
Group
Order Code
Group
Order Code
Group
CXB2540-0000000N0BW465E
65E
6500 K
80
70
---
---
65E
57E
5700 K
80
---
Order Code
57E
CXB2540-0000000N0BX265E
CXB2540-0000000N0HX265E
CXB2540-0000000N0BX257E
CXB2540-0000000N0HX257E
CXB2540-0000000N0HX457E
Notes
•
Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on
CRI measurements. See the Measurements section (page 18).
•
CXB2540 LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum
specified by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specified by the order code.
*
For 80 CRI minimum LEDs, CRI R9 minimum is 0 with a ±2 tolerance. For 90 CRI minimum LEDs, CRI R9 typical is 60.
** Flux values @ 25 °C are calculated and for reference only.
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF = 1100 mA, TJ = 85 °C) - CONTINUED
CRI*
Nominal
CCT
Min
70
5000 K
80
90
70
4000 K
80
90
Minimum Luminous Flux
Typ
---
---
92
---
---
92
2-Step
3-Step
Group
Flux (lm)
@ 85 °C
Flux
(lm) @
25 °C**
W4
5225
5784
X2
5590
6188
X4
6010
6653
W4
5225
5784
X2
5590
6188
X4
6010
6653
CXB2540-0000000N0HX450G
V4
4545
5031
CXB2540-0000000N0UV450G
W2
4860
5380
W4
5225
5784
W4
5225
5784
X2
5590
6188
X4
6010
6653
W2
4860
5380
W4
5225
5784
X2
5590
6188
CXB2540-0000000N0HX240H
CXB2540-0000000N0HX240G
V2
4230
4683
CXB2540-0000000N0UV240H
CXB2540-0000000N0UV240G
V4
4545
5031
W2
4860
5380
Group
Order Code
Group
Order Code
5-Step
Group
Order Code
CXB2540-0000000N0BW450E
50E
CXB2540-0000000N0BX250E
CXB2540-0000000N0BX450E
CXB2540-0000000N0HW450G
50G
50G
CXB2540-0000000N0HX250G
CXB2540-0000000N0HW450E
50E
CXB2540-0000000N0HX250E
CXB2540-0000000N0HX450E
CXB2540-0000000N0UW250G
CXB2540-0000000N0UW450G
CXB2540-0000000N0BW440E
40E
CXB2540-0000000N0BX240E
CXB2540-0000000N0BX440E
CXB2540-0000000N0HW240H
40H
40H
CXB2540-0000000N0HW440H
CXB2540-0000000N0UV440H
CXB2540-0000000N0UW240H
CXB2540-0000000N0HW240G
40G
40G
CXB2540-0000000N0HW440G
CXB2540-0000000N0UV440G
CXB2540-0000000N0UW240G
Notes
•
Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on
CRI measurements. See the Measurements section (page 18).
•
CXB2540 LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum
specified by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specified by the order code.
*
For 80 CRI minimum LEDs, CRI R9 minimum is 0 with a ±2 tolerance. For 90 CRI minimum LEDs, CRI R9 typical is 60.
** Flux values @ 25 °C are calculated and for reference only.
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF = 1100 mA, TJ = 85 °C) - CONTINUED
CRI*
Nominal
CCT
Min
80
Minimum Luminous Flux
Typ
---
2-Step
Group
Flux (lm)
@ 85 °C
Flux
(lm) @
25 °C**
W2
4860
5380
W4
5225
5784
X2
5590
6188
CXB2540-0000000N0HX235H
CXB2540-0000000N0HX235G
V2
4230
4683
CXB2540-0000000N0UV235H
CXB2540-0000000N0UV235G
V4
4545
5031
W2
4860
5380
CXB2540-0000000N0UW235H
CXB2540-0000000N0UW235G
V4
4545
5031
CXB2540-0000000N0HV430H
CXB2540-0000000N0HV430G
W2
4860
5380
W4
5225
5784
CXB2540-0000000N0HW430H
CXB2540-0000000N0HW430G
U4
3955
4378
CXB2540-0000000N0UU430H
CXB2540-0000000N0UU430G
V2
4230
4683
V4
4545
5031
CXB2540-0000000N0UV430H
CXB2540-0000000N0UV430G
V4
4545
5031
CXB2540-0000000N0HV427H
CXB2540-0000000N0HV427G
W2
4860
5380
W4
5225
5784
CXB2540-0000000N0HW427H
CXB2540-0000000N0HW427G
U2
3680
4074
CXB2540-0000000N0UU227H
CXB2540-0000000N0UU227G
U4
3955
4378
V2
4230
4683
V2
4230
4683
Group
80
92
---
35H
35H
30H
3000 K
90
80
92
---
30H
27H
2700 K
90
2200 K
80
92
---
Order Code
Group
CXB2540-0000000N0HW235H
3500 K
90
3-Step
27H
CXB2540-0000000N0HW435H
CXB2540-0000000N0UV435H
CXB2540-0000000N0HW230H
CXB2540-0000000N0UV230H
CXB2540-0000000N0HW227H
CXB2540-0000000N0UU427H
Order Code
5-Step
Group
Order Code
CXB2540-0000000N0HW235G
35G
35G
30G
30G
27G
27G
CXB2540-0000000N0UV227H
CXB2540-0000000N0HW435G
CXB2540-0000000N0UV435G
CXB2540-0000000N0HW230G
CXB2540-0000000N0UV230G
CXB2540-0000000N0HW227G
CXB2540-0000000N0UU427G
CXB2540-0000000N0UV227G
22G
CXB2540-0000000N0HV222G
Notes
•
Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on
CRI measurements. See the Measurements section (page 18).
•
CXB2540 LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum
specified by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specified by the order code.
*
For 80 CRI minimum LEDs, CRI R9 minimum is 0 with a ±2 tolerance. For 90 CRI minimum LEDs, CRI R9 typical is 60.
** Flux values @ 25 °C are calculated and for reference only.
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
FLUX CHARACTERISTICS, PREMIUM COLOR ORDER CODES AND BINS (IF = 1100 mA, TJ = 85 °C)
Fidelity
CRI*
Nominal
CCT
Minimum Luminous Flux
Min
Typ
Group
Flux (lm)
@ 85 °C
Flux
(lm) @
25 °C**
4000 K
95
98
U4
3955
4378
3500 K
95
98
U4
3955
3000 K
95
98
U2
2700 K
95
98
U2
Typical
Luminous
Flux (lm)
@ 85 °C
2-Step
Group
Order Code
4451
L5A
CXB2540-0000-000N0ZU4L5A
4378
4286
35H
CXB2540-0000-000N0ZU435H
3680
4074
4121
30H
CXB2540-0000-000N0ZU230H
3680
4074
3888
27H
CXB2540-0000-000N0ZU227H
Specialty
CRI
Nominal
CCT
3100 K
3000 K
Minimum Luminous Flux
Typical
Luminous
Flux (lm)
@ 85 °C
Min
Typ
Group
Flux (lm)
@ 85 °C
Flux
(lm) @
25 °C**
90
92
U4
3955
4378
4749
80
---
W2
4860
5380
5522
U2
3680
4074
U4
3955
4378
V2
4230
4683
U2
3680
4074
90
95
92
98
2-Step
Group
L7B
Order Code
3-Step
Group
Order Code
31Q
CXB2540-0000000N0UU431Q
Group
Order Code
CXB2540-0000000N0HW2L7B
CXB2540-0000000N0UU230U
4749
30Q
CXB2540-0000000N0UU430Q
CXB2540-0000000N0UV230Q
4121
L7C
30U
CXB2540-0000000N0UU430U
CXB2540-0000000N0UV230U
CXB2540-0000000N0ZU2L7C
Notes
•
Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on
CRI measurements. See the Measurements section (page 18).
•
CXB2540 LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum
specified by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specified by the order code.
*
For 80 CRI minimum LEDs, CRI R9 minimum is 0 with a ±2 tolerance. For 90 CRI minimum LEDs, CRI R9 typical is 60.
** Flux values @ 25 °C are calculated and for reference only.
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
RELATIVE SPECTRAL POWER DISTRIBUTION
The following graph is the result of a series of pulsed measurements at 1100 mA and TJ = 85 °C.
100%
Relative Spectral Power
90%
80%
70%
5000 K, 70 CRI
60%
4000 K, 70 CRI
50%
3000 K, 80 CRI
40%
3000 K, 90 CRI
30%
2200 K, 80 CRI
20%
10%
0%
380
430
480
530
580
630
680
730
780
Wavelength (nm)
RELATIVE SPECTRAL POWER DISTRIBUTION, PREMIUM COLOR
The following graphs are the result of a series of pulsed measurements at 800 mA and TJ = 85 °C.
Fidelity
100%
Relative Spectral Power
90%
80%
70%
60%
4000 K, Z CRI
50%
3500 K, Z CRI
3000 K, Z CRI
40%
2700 K, Z CRI
30%
20%
10%
0%
380
430
480
530
580
630
680
730
780
Wavelength (nm)
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
RELATIVE SPECTRAL POWER DISTRIBUTION, PREMIUM COLOR - CONTINUED
Relative Spectral Power Distribution
Specialty
100%
90%
Relative Spectral Power
80%
70%
31Q, 3100 K, 90 CRI
60%
30Q, 3000 K, 90 CRI
50%
30U, 3000 K, 90 CRI
40%
L7B, 3000 K 80 CRI
30%
L7C, 3000 K, Z CRI
20%
10%
0%
380
430
480
530
580
630
680
730
780
Wavelength (nm)
ELECTRICAL CHARACTERISTICS
The following graph is the result of a series of steady-state measurements.
37.0
36.5
36.0
Voltage (V)
35.5
35.0
Tc = 25 °C
34.5
Tc = 55 °C
34.0
Tc = 85 °C
33.5
Tc = 105 °C
33.0
32.5
32.0
31.5
400
740
1080
1420
1760
2100
Current (mA)
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
RELATIVE LUMINOUS FLUX
The relative luminous flux values provided below are the ratio of measurements of the CXB2540 LED at steady-state operation at the given
conditions, divided by the flux measured during binning, which is a pulsed measurement at 1100 mA at TJ = 85 °C.
For example, at steady-state operation of Tc = 25 °C, IF = 740 mA, the relative luminous flux ratio is 80% in the chart below. A CXB2540 LED
that measures 5225 lm during binning will deliver 4180 lm (5225 * 0.8) at steady-state operation of Tc = 25 °C, IF = 740 mA.
180%
160%
Relative Luminous Flux
140%
120%
Tc = 25 °C
100%
Tc = 55 °C
80%
Tc = 85 °C
Tc = 105 °C
60%
40%
20%
0%
400
740
1080
1420
1760
2100
Current (mA)
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
Far Field
TYPICAL SPATIAL DISTRIBUTION
Relative Luminous Intensity
100%
80%
60%
40%
20%
-90
-70
-50
-30
-10
0%
10
30
50
70
90
Angle (º)
PERFORMANCE GROUPS - BRIGHTNESS (I F = 1100 mA, TJ = 85 °C)
XLamp CXB2540 LEDs are tested for luminous flux and placed into one of the following bins.
Group Code
Minimum Luminous Flux
Maximum Luminous Flux
U2
3680
3955
U4
3955
4230
V2
4230
4545
V4
4545
4860
W2
4860
5225
W4
5225
5590
X2
5590
6010
X4
6010
6430
Y2
6430
6910
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
PERFORMANCE GROUPS - CHROMATICITY (TJ = 85 °C)
XLamp CXB2540 LEDs are tested for chromaticity and placed into one of the regions defined by the following bounding coordinates.
EasyWhite Color Temperatures – 2-Step
Code
40H
35H
30H
27H
CCT
4000 K
3500 K
3000 K
2700 K
x
y
0.3777
0.3739
0.3797
0.3816
0.3861
0.3855
0.3838
0.3777
0.4022
0.3858
0.4053
0.3942
0.4125
0.3977
0.4091
0.3891
0.4287
0.3975
0.4328
0.4064
0.4390
0.4086
0.4347
0.3996
0.4524
0.4048
0.4574
0.4140
0.4633
0.4154
0.4581
0.4062
EasyWhite Color Temperatures – 3-Step Ellipse
Bin Code
CCT
50G
40G
Center Point
Major Axis
Minor Axis
Rotation Angle
(°)
x
y
a
b
5000 K
0.3447
0.3553
0.00840
0.00312
65.0
4000 K
0.3818
0.3797
0.00939
0.00402
53.7
35G
3500 K
0.4073
0.3917
0.00927
0.00414
54.0
30G
3000 K
0.4338
0.4030
0.00834
0.00408
53.2
27G
2700 K
0.4577
0.4099
0.00834
0.00420
48.5
22G
2200 K
0.5066
0.4158
0.00980
0.00480
45.5
EasyWhite Color Temperatures – 5-Step Ellipse
Bin Code
CCT
65E
Center Point
Major Axis
Minor Axis
Rotation Angle
(°)
x
y
a
b
6500 K
0.3123
0.3282
0.01110
0.00550
61.0
57E
5700 K
0.3287
0.3417
0.01230
0.00600
72.0
50E
5000 K
0.3447
0.3553
0.01400
0.00520
65.0
40E
4000 K
0.3818
0.3797
0.01565
0.00670
53.7
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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XLAMP ® CXB2540 LED
PREMIUM COLOR PERFORMANCE GROUPS - CHROMATICITY (TJ = 85 °C)
XLamp CXB2540 LEDs are tested for chromaticity and placed into one of the regions defined by the following bounding coordinates.
Fidelity
EasyWhite Color Temperatures – 2-Step
Code
L5A
35H
30H
27H
CCT
4000 K
3500 K
3000 K
2700 K
x
y
0.3764
0.3711
0.3784
0.3787
0.3847
0.3826
0.3825
0.3748
0.4022
0.3858
0.4053
0.3942
0.4125
0.3977
0.4091
0.3891
0.4287
0.3975
0.4328
0.4064
0.4390
0.4086
0.4347
0.3996
0.4524
0.4048
0.4574
0.4140
0.4633
0.4154
0.4581
0.4062
Specialty
EasyWhite Color Temperatures – 2-Step
Code
L7B
L7C
CCT
3000 K
3000 K
x
y
0.4263
0.3848
0.4296
0.3916
0.4361
0.3938
0.4326
0.3868
0.4192
0.3754
0.4224
0.3823
0.4291
0.3847
0.4257
0.3777
EasyWhite Color Temperatures – 3-Step Ellipse
Center Point
Major Axis
Minor Axis
Rotation Angle
(°)
Bin Code
CCT
x
y
a
b
31Q
3100 K
0.4236
0.3888
0.00848
0.00455
50.3
30Q
3000 K
0.4305
0.3935
0.00834
0.00408
53.2
30U
3000 K
0.4274
0.3837
0.00834
0.00408
53.2
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
CLD-DS123
REV 10A
12
XLAMP ® CXB2540 LED
EASYWHITE® BINS PLOTTED ON THE 1931 CIE COLOR SPACE (TJ = 85 °C)
0.45
ANSI C78.377 Quadrangle
0.44
2700 K
EasyWhite 5-step
0.43
2200 K
2450 K
3000 K
EasyWhite 3-step
0.42
EasyWhite 2-step
3500 K
0.41
4000 K
0.40
CCy
0.39
5000 K
4500 K
5700 K
0.38
0.37
6500 K
0.36
0.35
7000K
0.34
0.33
0.32
0.54
0.53
0.52
0.51
0.50
0.49
0.48
0.47
0.46
0.45
0.44
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
0.34
0.33
0.32
0.31
0.30
0.29
0.31
CCx
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
CLD-DS123
REV 10A
13
XLAMP ® CXB2540 LED
PREMIUM COLOR BINS PLOTTED ON THE 1931 CIE COLOR SPACE (TJ = 85 °C)
Fidelity (2-step)
0.44
2700K
ANSI C78.377 Quadrangle
0.43
3000K
0.42
3500K
0.41
27H
4000K
CCy
0.40
30H
4500K
35H
0.39
0.38
L5A
0.37
0.36
0.35
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
0.48
0.47
0.46
0.45
0.44
CCx
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
0.34
CLD-DS123
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XLAMP ® CXB2540 LED
PREMIUM COLOR BINS PLOTTED ON THE 1931 CIE COLOR SPACE (TJ = 85 °C) - CONTINUED
Speciality (2-step)
0.44
ANSI C78.377 Quadrangle
3000 K
0.43
0.42
3500 K
CCy
0.41
0.40
0.39
L7B
L7C
0.38
0.46
0.45
CCx
0.44
0.43
0.42
0.41
0.37
Speciality (3-step)
0.44
ANSI C78.377 Quadrangle
3000K
0.43
0.42
3500K
CCy
0.41
0.40
30Q
0.39
31Q
30U
0.38
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
0.46
0.45
CCx
0.44
0.43
0.42
0.41
0.37
CLD-DS123
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XLAMP ® CXB2540 LED
BIN AND ORDER CODE FORMATS
Bin codes and order codes are configured as follows:
Order Code Bin Code
Series = CXB25
Series = CXB25
Internal code
Chromaticity bin
CRI Specification
B = 70 CRI minimum
H = 80 CRI minimum
U = 90 CRI minimum
Z = 95 CRI minimum
Vf class
N0 = 36-V class
Internal code
SSSSSCC-WWW-FF-GGR-AAAAA
CRI Specification
B = 70 CRI minimum
H = 80 CRI minimum
U = 90 CRI minimum
Z = 95 CRI minimum
SSSSSCC-HHHH-HHHGGRNNNNN
Kit code
Vf class
N0 = 36-V class
Flux bin
Performance class
Performance class
MECHANICAL DIMENSIONS
Dimensions are in mm.
Tolerances unless otherwise
specified: ±.13
x° ±1°
B2540N = 36‑V CXB2540
B2540N
Meaning of B2540N
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
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16
XLAMP ® CXB2540 LED
THERMAL DESIGN
The CXB family of LED arrays can include over a hundred different LED die inside one package, and thus over a hundred different junction
temperatures (TJ). Cree LED has intentionally removed junction-temperature-based operating limits and replaced the commonplace
maximum TJ calculations with maximum ratings based on forward current (IF) and case temperature (Tc). No additional calculations
are required to ensure that the CXB LED is being operated within its designed limits. LES temperature measurement provides additional
verification of good thermal design. Please refer to page 2 for the Operating Limit specifications.
There is no need to calculate for TJ inside the package, as the thermal management design process, specifically from TSP to ambient (Ta),
remains identical to any other LED component. For more information on thermal management of XLamp LEDs, please refer to the Thermal
Management application note. For CXB soldering recommendations and more information on thermal interface materials (TIM), LES
temperature measurement, and connection methods, please refer to the XLamp CX Family LEDs soldering and handling document. The
CX Family LED Design Guide provides basic information on the requirements to use XLamp CXB LEDs successfully in luminaire designs.
To keep the CXB2540 LED at or below the maximum rated Tc, the case to ambient temperature
thermal resistance (R_c-a) must be at or below the maximum R_c-a value shown on the following
R_j-c
R_j-c
scale.
Tc
Tc
As the figure at right shows, the R_c-a value is the sum of the thermal resistance of the TIM (R_tim)
R_tim
graph, depending on the operating environment. The y‑axis in the graph is a base 10 logarithmic
R_c-a
plus the thermal resistance of the heat sink (R_hs).
R_hs
CXB2540
Ta
Ta
Maximum R_c-a
10.00
1.00
Ta = 25 °C
Ta = 55 °C
Ta = 85 °C
Ta = 105 °C
0.10
0.01
400
740
1080
1420
1760
2100
Current (mA)
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
CLD-DS123
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XLAMP ® CXB2540 LED
NOTES
Measurements
The luminous flux, radiant power, chromaticity, forward voltage and CRI measurements in this document are binning specifications only
and solely represent product measurements as of the date of shipment. These measurements will change over time based on a number
of factors that are not within Cree LED’s control and are not intended or provided as operational specifications for the products. Calculated
values are provided for informational purposes only and are not intended or provided as specifications.
Pre‑Release Qualification Testing
Please read the LED Reliability Overview for details of the qualification process Cree LED applies to ensure long-term reliability for XLamp
LEDs and details of Cree LED’s pre-release qualification testing for XLamp LEDs.
Lumen Maintenance
Cree LED now uses standardized IES LM-80-08 and TM-21-11 methods for collecting long-term data and extrapolating LED lumen
maintenance. For information on the specific LM-80 data sets available for this LED, refer to the public LM-80 results document.
Please read the Long-Term Lumen Maintenance application note for more details on Cree LED’s lumen maintenance testing and
forecasting. Please read the Thermal Management application note for details on how thermal design, ambient temperature, and drive
current affect the LED junction temperature.
RoHS Compliance
The levels of RoHS restricted materials in this product are below the maximum concentration values (also referred to as the threshold
limits) permitted for such substances, or are used in an exempted application, in accordance with EU Directive 2011/65/EC (RoHS2), as
implemented January 2, 2013. RoHS Declarations for this product can be obtained from your Cree LED representative or from the Product
Ecology section of the Cree LED website.
REACh Compliance
REACh substances of very high concern (SVHCs) information is available for this product. Since the European Chemical Agency (ECHA)
has published notice of their intent to frequently revise the SVHC listing for the foreseeable future, please contact a Cree LED representative
to insure you get the most up-to-date REACh Declaration. REACh banned substance information (REACh Article 67) is also available upon
request.
UL® Recognized Component
This product meets the requirements to be considered a UL Recognized Component with Level 4 enclosure consideration. The LED
package or a portion thereof has been investigated as a fire and electrical enclosure per ANSI/UL 8750.
Vision Advisory
WARNING: Do not look at an exposed lamp in operation. Eye injury can result. For more information about LEDs and eye safety, please
refer to the LED Eye Safety application note.
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and
the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered
trademarks of UL LLC.
CLD-DS123
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XLAMP ® CXB2540 LED
PACKAGING
6
5
4
3
2
CXB2540 LEDs are packaged in trays of 20. Five trays are sealed in an anti-static bag and placed inside a carton, for a total of 100 LEDs
NOTICE
TIAL. THIS PLOT AND THE INFORMATION
HIN ARE THE PROPRIETARY AND
NFORMATION OF CREE, INC. THIS PLOT
PIED, REPRODUCED OR DISCLOSED TO ANY
PERSON WITHOUT
THE WRITTEN CONSENT
per carton. Each carton contains 100 LEDs from the same performance bin.
Dimensions are in inches.
Tolerances: ±.13
7.125
5
R .375
4
5
4
3
x° ±1°
2
3
1
2
1
AND THE INFORMATION
OPRIETARY AND
F CREE, INC. THIS PLOT
NSENT
ED OR DISCLOSED TO ANY
OUT
THE WRITTEN CONSENT
5.875
1.188
7.125
R .375
R .375
7.625
.875
1.188
7.625
.38
1.188
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
BAG
PATENT LABEL IS LOCATED
ON UNDERSIDE OF COVER
PATENT LABEL IS LOCATED
1.188
ON UNDERSIDE OF CARTON
.38
BAG
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
BAG
.38
TH CREE BIN
.875
PATENT
ANTITY,
LOT #LABEL IS LOCATED
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
ON UNDERSIDE OF COVER
L IS LOCATED
IDE OF COVER
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN
MILLIMETERS & BEFORE FINISH.
TOLERANCE UNLESS SPECIFIED:
.X
±
.XX
±
.XXX ±
X°
±
THIRD ANGLE PROJECTION
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
6
5
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN
MILLIMETERS & BEFORE FINISH.
TOLERANCE UNLESS SPECIFIED:
4
3±
.X
.XX
±
.XXX ±
X°
±
THIRD ANGLE PROJECTION
WITH CREE BIN
QUANTITY, LOT #
0.1
.05
.005
1 °
APPROVED
±
DATE
APPROVED
DATE
TITLE
CXA25XX
SIZE
FINAL PROTECTIVE FINISH
SCALE
CXA25
4600 Silicon Drive
Durham, N.C 27703
Phone (919) 361-4770
0.500
Fax (919) 313-5303
2
DATE
DRAWING
C
TITLE
DRAWN BY
MATERIAL
CXA25XX_DATASHEET
DATE
SIZE
DATE
FINAL PROTECTIVE FINISH
© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered
X°0.1 ±
2 ° and
APPROVED
.X
± trademarks,
®
®
.XXUL logo
±
.05
the Cree LED logo is a trademark,
of Wolfspeed, Inc. XLamp® and EasyWhite
are registered trademarks of Cree LED. UL
are registered
5
4
3 and the
.XXX ± .005
trademarks of UL LLC.
THIRD ANGLE PROJECTION
MATERIAL
SCALE
DATE
2
TITLE
SIZE
FINAL PROTECTIVE FINISH
C
4600 Silicon Drive
Durham, N.C 27703
DRAWING NO.
CXA25XX_DATASHEET_BAG2013
R
Phone (919) 361-4770
CLD-DS123
0.500
REV 10A
19
Fax (919) 313-5303
SHEET
1
CXA15XX_DATASHEET
1 °
FOR SHEET METAL PARTS ONLY
.X
±
.06
DATE
MATERIAL
FOR SHEET METAL PARTS ONLY
DATE
DRAWN.X
BY
±
.06
.XX
±
.03
.XXX ±
.010
CHECK
DATE
X°
±
2 °
UNLESS OTHERWISE SPECIFIED
FOR SHEET METAL PARTS ONLY
DIMENSIONS ARE IN
.X
±
.06 CHECK
MILLIMETERS & BEFORE FINISH.
.XX
±
.03
TOLERANCE UNLESS SPECIFIED:
.XXX ±
.010
X°
0.1
.05
.005
1 °
DRAWN BY
CHECK
DRAWING NO.
CXA15XX_DATASHEET_BAG2013
OF