VPR221SZ (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Bulk Metal® Z-Foil Surface Mount Power
Resistor in TO-220 Configuration with TCR of ± 0.05 ppm/°C,
PCR of 4 ppm/W and Load Life Stability of ± 0.005 % (50 ppm)
FEATURES
Temperature coefficient of resistance (TCR):
INTRODUCTION
The Z-Foil technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
Model VPR221SZ is a 4 lead kelvin connected surface
mount device which provides high rated power, excellent
load life stability, low temperature coefficient (TCR) and low
power coefficient (PCR) - all in one resistor. ± 0.05 ppm/°C
absolute TCR removes error due to temperature gradients.
By taking advantage of the overall stability and reliability of
Bulk Metal® Z-Foil resistors, designers can significantly
reduce circuit errors and greatly improve overall circuit
performances.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
Tolerance: to ± 0.01 %
Power coefficient “R due to self heating”: 4 ppm/W typical
Rated power: 8 W chassis mounted (MIL-PRF-39009)
Load life stability: to ± 0.005 % at 25 °C for 2000 h, at 1.5 W
Resistance range: 0.5 to 500
Foil resistors are not restricted to standard values; specific
“as requested” values can be supplied at no extra cost or
delivery (e.g. 100R2345 vs. 100R)
Electrostatic discharge (ESD) up to 25 000 V
Short time overload 0.001 % (10 ppm)
Non-inductive, non-capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
Thermal EMF: 0.05 µV/°C typical
Voltage coefficient < 0.1 ppm/V
Non-inductive: < 0.08 µH
Non hot spot design
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Terminal finish: lead (Pb)-free or tin/lead alloy
Compliant to RoHS directive 2002/95/EC
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
For better performances please contact us
FIGURE 1 - SCHEMATICS
R
I
I1
E1
TIGHTEST
RESISTANCE
TOLERANCE
TYPICAL TCR AND
MAX. SPREAD (1)
0.5 to < 1
± 0.05 %
± 0.2 ppm/°C ± 2.8 ppm/°C
1 to < 10
± 0.02 %
± 0.2 ppm/°C ± 2.3 ppm/°C
10 to 500
± 0.01 %
± 0.2 ppm/°C ± 1.8 ppm/°C
E2
I2
V
TABLE 1 - TCR AND TOLERANCE
FIGURE 2 - POWER DERATING CURVE
- 55 °C
100
Notes
(1)
MIL-range (- 55 °C to + 125 °C, + 25 °C ref.)
•
Contact applications engineering for other available values
Percent of Rated Power
RESISTANCE
RANGE ()
I
75
50
25
0
- 75
- 50
- 25
0
25
50
75
100
125
150
Ambient Temperature (°C)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63127
Revision: 16-Aug-12
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
1
VPR221SZ (Z-Foil)
Vishay Foil Resistors
FIGURE 3 - TRIMMING TO VALUES
(conceptual illustration)
FIGURE 4 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
(for more details see table 1)
TCR Chord Slopes for Different Temperature Ranges
+ 500
Interloop
Capacitance
Reduction
in Series
Current Path
Before Trimming
+ 400
+ 300
+ 200
Current Path
After Trimming
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
+ 100
ΔR
0
R
(ppm)
- 100
0.05 ppm/°C
- 200
- 0.1 ppm/°C
0.1 ppm/°C
- 300
0.14 ppm/°C
- 400
- 0.16 ppm/°C
0.2 ppm/°C
- 500
Note: Foil shown in black, etched spaces in white
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
Ambient Temperature (°C)
FIGURE 5 - VPR221SZ FORMING
DIMENSIONS in inches (millimeters)
FIGURE 6 - VPR221SZ DIMENSIONS
in inches (millimeters)
0.365 (9.27) Ref.
0.400 ± 0.010
(10.16 ± 0.25)
0.015 ± 0.002
(0.38 ± 0.05)
0.150 ± 0.008
(3.81 ± 0.20)
0.078 ± 0.005
(1.98 ± 0.13)
0.050 ± 0.005
(1.27 ± 0.13)
0.150 ± 0.008
(3.81 ± 0.20)
0.115 ± 0.005
(2.92 ± 0.13)
0.245 ± 0.010
(6.22 ± 0.25)
Before Forming
VFR
VPR221SZ
1R0 1 %
0101
0.141 ± 0.005 Dia.
(3.58 ± 0.13)
0.200 ± 0.030
(5.08 ± 0.76)
0.695 ± 0.010
(17.65 ± 0.25)
0.110 (2.79) Ref.
0.050 ± 0.005
(1.27 ± 0.13)
0.540 ± 0.040
(13.72 ± 1.02)
0.030 ± 0.002
(0.76 ± 0.05)
0.090 (2.286) Ref.
0.090 ± 0.010
(2.29 ± 0.25)
Heat Sink
After Forming
Flush with Heat Sink
Within ± 0.002 (± 0.05)
I1 E1 E2 I2
0.050 ± 0.005
(1.27 ± 0.13)
0.615 Max.
(15.62)
0.015 ± 0.002
(0.38 ± 0.05)
0.078 ± 0.005
(1.98 ± 0.13)
0.100 ± 0.005
(2.54 ± 0.13)
FIGURE 7 - LAND PATTERN DIMENSIONS in inches (millimeters)
0.050 ± 0.010
(1.27 ± 0.25)
0.120 ± 0.010
(3.05 ± 0.25)
0.10 ± 0.005
(2.54 ± 0.12)
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For any questions, contact: foil@vishaypg.com
Document Number: 63127
Revision: 16-Aug-12
VPR221SZ (Z-Foil)
Vishay Foil Resistors
TABLE 2 - SPECIFICATIONS
Power Rating at + 25 °C
8 W or 3 A (1) on heat sink (2)
1.5 W in free air
Further derating not necessary.
Current Noise
< 0.010 µVRMS/V of applied voltage (- 40 dB)
High Frequency Operation
Rise Time
Inductance (L) (3)
Capacitance (C)
0.2 ns at 1 W
0.1 µH maximum: 0.03 µH typical
1.0 pF maximum: 0.5 pF typical
Voltage Coefficient (4)
< 0.1 ppm/V
Operating Temperature Range
- 55 °C to + 150 °C
Maximum Working Voltage
300 V, not to exceed power rating
Thermal EMF (5)
0.15 µV/°C maximum (lead effect)
Weight
1.2 g maximum
Notes
(1)
(2)
(3)
(4)
(5)
Whichever is lower
Heat sink chassis dimensions are requirements per MIL-R-39009/1B:
DIMENSIONS
inches
mm
L
6.00
152.4
W
4.00
101.6
H
2.00
50.8
T
0.04
1.0
Inductance (L) mainly due to the leads
The resolution limit of existing test requirement (within the measurement capability of the equipment, “essentially zero”)
µV/°C relates to EMF due to lead temperature difference
TABLE 3 - PERFORMANCE SPECIFICATIONS (1) MIL-PRF 39009
TEST OR CONDITION
MIL-PRF 39009
TYPICAL R
MAXIMUM R
Low temperature storage 24 h at - 55 °C
± 0.3 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
Dielectric withstanding voltage 300 VAC at Atm
± 0.2 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
Dielectric withstanding voltage 200 VAC at Brm
± 0.2 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
> 104 M
Insulation resistance
> 104 M
Low temperature operation
± 0.3 % + 0.01
± 0.002 % (20 ppm)
± 0.008 % (80 ppm)
Short time overload 5 x rated power for 5 s (in air)
± 0.3 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
Moisture resistance + 65 °C to - 10 °C, 90 RH to 98 RH, 10
days
± 0.5 % + 0.01
± 0.005 % (50 ppm)
± 0.015 % (150 ppm)
Terminal strength
± 0.2 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
Load life 8 W at + 25 °C, 2000 h with heat sink
± 1.0 % + 0.01
± 0.005 % (50 ppm)
± 0.015 % (150 ppm)
Load life 1.5 W at + 25 °C for 2000 h in free air
± 1.0 % + 0.01
± 0.005 % (50 ppm)
± 0.015 % (150 ppm)
High temperature exposure + 150 °C
± 1.0 % + 0.05
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
Note
(1)
Measurement error ± 0.001 %
Document Number: 63127
Revision: 16-Aug-12
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
3
VPR221SZ (Z-Foil)
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION
(1)
NEW GLOBAL PART NUMBER: Y2123420R220T9L (preferred part number format)
DENOTES PRECISION
VALUE
CHARACTERISTICS
Y
R=
0 = standard
9 = lead (Pb)-free
1 to 999 = custom
Y
2
1
2
3
4
2
0
R
PRODUCT CODE
RESISTANCE TOLERANCE
2123 = VPR221SZ
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
2
2
0
T
9
L
PACKAGING
L = bulk
R = tape and reel
FOR EXAMPLE: ABOVE GLOBAL ORDER Y2123 420R220 T 9 L:
TYPE: VPR221SZ
VALUE: 420.22
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
HISTORICAL PART NUMBER: VPR221SZ T 420R22 TCR0.2 T B (will continue to be used)
VPR221SZ
T
420R22
TCR0.2
T
B
MODEL
TERMINATION
OHMIC VALUE
TCR
CHARACTERISTIC
ABSOLUTE
TOLERANCE
PACKAGING
T = lead (Pb)-free
none = tin/lead
420.22
TCR0.2
T = ± 0.01 %
Q = ± 0.02 %
A = ± 0.05 %
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
B = bulk
T = tape and reel
Note
(1)
For non-standard requests, please contact application engineering
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For any questions, contact: foil@vishaypg.com
Document Number: 63127
Revision: 16-Aug-12
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Document No.: 63999
Revision: 15-Jul-2014
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