CO
M
G E & PL I
AN
N
FR
T*
EE
**
AUTOMOTIVE
HS
LO
HA
Ro
Features
Applications
n High power density
n Power supplies
n High reliability and stability
n Stepper motor drives
n RoHS compliant* and halogen free**
n Input amplifiers
n Metal foil
G R A DE
n Current sensing
PL
IA
NT
n AEC-Q200 Compliant
CFN-A Series Metal Foil, Current Sensing Chip Resistor
*R
oH
S
CO
M
Additional Information
Electrical Characteristics
0.5 W
0.75 W
1W
5 mΩ,
10 mΩ,
20 mΩ
5 mΩ,
10 mΩ,
20 mΩ,
30 mΩ
5 mΩ,
10 mΩ,
20 mΩ,
40 mΩ
EE
CFN1206A
10 mΩ,
20 mΩ
-55 ℃ ~ +125 ℃
-55 ℃ ~ +155 ℃
Temperature Coefficient
of Resistance
±100 ppm/°C
±50 ppm/°C & ±100 ppm/°C
PRODUCT
Tolerance
TECHNICAL INVENTORY
LIBRARY
SAMPLES
CONTACT
Derating Curve
Ro VER LEA
HS SI D F
CO ON RE
M SA E
PL R
IA E
NT
*
Operating Temperature
Range
Click these links for more information:
Power Ratio (%)
0.2 W
Resistance Value
CFN0805A
LE
Power Rating @ 70 °C
CFN0603A
FR
CFN0402A
AD
Characteristic
±1 %, ±5 %
100
CFN0603A
CFN0805A
CFN1206A
CFN0402A
-55
70
125
155
Ambient Temperature (°C)
Environmental Characteristics
Storage Conditions
Temperature�������������������������������������������������������������������������������������������������������������������������������������������������������������������+5 °C ~ +35 °C
Humidity���������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 40 % ~ 75 %
Shelf Life������������������������������������������������������������������������������������������������������������������������������������������������� 2 years from manufacturing date
Solder Recommendations����������������������������������������������������������������������������������������������������������������������������������������������������� Reflow profile
(Solder: Sn96.5 / Ag3 / Cu0.5)
Moisture Sensitivity Level��������������������������������������������������������������������������������������������������������������������������������������������������������������������������1
Product Dimensions
L
W
D
t
CFN0402A
1.10 ± 0.10
(.043 ± .004)
0.55 ± 0.10
(.021 ± .004)
0.25 ± 0.10
(.009 ± .004)
0.45 ± 0.10
(.017 ± .004)
CFN0603A
1.60 ± 0.20
(.063 ± .008)
0.80 ± 0.20
(.031 ± .008)
0.40 ± 0.20
(.016 ± .008)
0.60 ± 0.20
(.024 ± .008)
CFN0805A
2.00 ± 0.20
(.079 ± .008)
1.25 ± 0.20
(.049 ± .008)
0.40 ± 0.20
(.016 ± .008)
0.70 ± 0.20
(.028 ± .008)
CFN1206A
3.20 ± 0.20
(.126 ± .008)
1.60 ± 0.20
(.063 ±. 008)
0.50 ± 0.20
(.020 ± .008)
0.70 ± 0.20
(.028 ± .008)
L
W
C
C
T
DIMENSIONS:
MM
(INCHES)
WARNING Cancer and Reproductive Harm
www.P65Warnings.ca.gov
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br)
and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CFN-A Series Metal Foil, Current Sensing Chip Resistor
Construction
Recommended Solder Pad Dimensions
L
SOLDER
COATING
TOP PROTECTIVE
COATING
METAL FOIL
B
A
NICKEL
UNDERLAY
SOLDER
COATING
BOTTOM
PROTECTIVE COATING
ALUMINA
SUBSTRATE
Cu Trace
Marking
NICKEL
UNDERLAY
Sensing Trace
METAL FOIL
Model
CFN0805A
CFN0402A
CFN1206A
CFN0603A
005 = 5 mΩ
No Marking
010 = 10 mΩ
020 = 20 mΩ
BOTTOM
ALUMINA
6.5 = 6.5 mΩ
PROTECTIVE COATING
SUBSTRATE
A
L
CFN0402A
10 ≤ R ≤ 20
0.70
(.027)
1.20
(.047)
CFN0603A
10 ≤ R ≤ 20
1.00
(.039)
2.80
(.110)
CFN0805A
10 ≤ R ≤ 30
1.40
(.055)
3.20
(.126)
1.80
(.071)
4.70
(.185)
CFN1206A
20 ≤ R ≤ 30
R = 40
DIMENSIONS:
B
0.45
(.018)
0.60
(.024)
1.20
(.047)
1.60
(.063)
2.20
(.087)
MM
(INCHES)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CFN-A Series Metal Foil, Current Sensing Chip Resistor
Solder Reflow Recommendations
CRITICAL ZONE
T L TO TP
RAMP-UP
TL
Temperature
tL
TS MAX.
RAMP-DOWN
TS MIN.
Solder Profile
tp
TP
ts
PREHEAT
25 °C
8 MINUTES MAX.
t 25 *C TO PEAK
Time
Average ramp-up rate
(Tsmax to Tp)
Lead Free Assembly
3 °C / second max.
Preheat:
- Temperature Min. (Tsmin)
- Temperature Max. (Tsmax)
- Time (Tsmin to Tsmax) (ts)
150 °C
200 °C
60~150 seconds
Time maintained above:
- Temperature (TL)
- Time (TL)
217 °C
60~120 seconds
Peak Temperature (Tp)
260 °C
Time within +0/-5 °C of actual
Peak Temperature (Tp)2
10 seconds
Ramp-down rate
6 °C / second max.
Time 25 °C to Peak
Temperature
8 minutes max.
How to Order
CFN 0805 A F X - R005 E LF
Model
CFN = Metal Foil Current Sense Resistor
Size
0402 = 0402 Size
0603 = 0603 Size
0805 = 0805 Size
1206 = 1206 Size
Feature
A = AEC-Q200 Compliant
Resistance Tolerance
F = ±1 %
J = ±5 %
TCR
X = ±100 PPM/°C
Z = ±50 PPM/°C
Resistance Code – (See Popular Resistance Table)
“R” (decimal point) followed by three significant digits (example: R005 = 0.005 ohms)
Packaging
E = Tape and Reel
4,000 pcs. / 7-inch reel, paper tape (CFN0805A, CFN1206A)
5,000 pcs. / 7-inch reel, paper tape (CFN0603A)
10,000 pcs. / 7-inch reel, paper tape (CFN0402A)
Termination
LF = Tin-plated (RoHS Compliant)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CFN-A Series Metal Foil, Current Sensing Chip Resistor
Packaging Dimensions (Conforms to EIA RS-481A)
Top Tape
E
P0
D0 DIA.
Bottom Tape
F
B
Resistor
W
Paper Tape
T
A
A
B
CFN0402A
0.75
(.030)
1.30
(.051)
CFN0603A
1.10
(.043)
1.90
(.075)
CFN0805A
1.60
(.063)
2.40
(.094)
CFN1206A
2.00
(.079)
3.60
(.142)
P1
W
F
P2
E
P1
DIRECTION OF UNREELING
P2
P0
D0
2.00
(.079)
8.00
(.315)
3.50
(.138)
1.75
(.069)
4.00
(.157)
T
0.65
(.026)
2.00
(.079)
4.00
(.157)
1.50
(.059)
0.85
(.033)
1.05
(.041)
1.05
(.041)
9.0 ± 1.0
(.354 ± .039)
13.0 ± 1.0
(.512 ± .039)
DIA.
DIA.
178 ± 2.0
(7.008 ± .079)
DIA.
60.0 ± 1.0
(2.362 ± .039)
DIMENSIONS:
MM
(INCHES)
11.5 ± 1.0
(.453 ± .039)
Asia-Pacific: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CFN-A Series Metal Foil, Current Sensing Chip Resistor
Reliability Tests
Test Items
Reference Standard
Condition of Test
Test Limits
Temperature Coefficient of
Resistance
IEC 60115-1 4.8
+25 ~ 125 °C
Reference item 4
Short Time Overload
IEC 60115-1 4.13
5X rated power for 5 s
< ±1 %
High Temperature
Exposure (Storage)
AEC-Q200-REV D-Test 3
MIL-STD-202 Method 108
1000 hrs @ T = 125 °C. Unpowered.
Measurement at 24 ±2 hours after test conclusion.
< ±1 %
Temperature Cycling
AEC-Q200-REV D-Test 4
JESD22 Method JA-104
1000 cycles (-55 °C to +125 °C). Measurement
at 24 ±4 hours after test conclusion. 30 min. max.
dwell time at each temperature extreme. 1 min.
max. transition time.
< ±1 %
Moisture Resistance
AEC-Q200-REV D-Test 6
MIL-STD-202 Method 106
T = 24 hours/cycle, 10 cycles. Notes: Steps 7a &
7b not required. Unpowered.
< ±1 %
Biased Humidity
AEC-Q200-REV D-Test 7
MIL-STD-202 Method 103
1000 hours 85 °C / 85 % RH. Note: Specified
conditions: 10 % of operating power (not
< ±1 %
exceeding max. working voltage). Measurement at
24 ±2 hours after test conclusion.
Operational Life
AEC-Q200-REV D-Test 8
MIL-STD-202 Method 108
1000 hours TA = 125 °C at 35 % rated power.
Measurement at 24 ±4 hours after test conclusion.
External Visual
AEC-Q200-REV D-Test 9
MIL-STD-883 Method 2009
Electrical test not required. Inspect device
construction, marking and workmanship.
Physical Dimensions
AEC-Q200-REV D-Test 10
JESD22 Method JB-100
Verify physical dimensions to the applicable device
detail specification. Note: User(s) and Suppliers
spec. Electrical test not required.
Resistance to Solvents
AEC-Q200-REV D-Test 12
MIL-STD-202 Method 215
a: Isopropyl Alcohol : Mineral Spirits = 1 : 3
b: Terpene Defluxer (Bioact EC-7R)
c: Deionized Water : Propylene Glycol
Monomethyl Ether : monoethanolamine 42 : 1 : 1
Marking and
protective layer
cannot be
detached
Mechanical Shock
AEC-Q200-REV D-Test 13
MIL-STD-202 Method 213
Wave Form: Tolerance for half sine shock pulse.
Peak value is 100 g’s. Normal duration (D) is 6 ms
< ±1.0 %
Vibration
AEC-Q200-REV D-Test 14
MIL-STD-202 Method 204
5 g’s for 20 min., 12 cycles each of 3 orientations.
Note: Test from 10-2000 Hz.
< ±1.0 %
Resistance to Soldering
Heat
AEC-Q200-REV D-Test 15
MIL-STD-202 Method 210
Condition B: Immerse the specimens in an eutectic
< ±0.5 %
solder at 260 ±5 °C for 10 ±1 s.
Thermal Shock
AEC-Q200-REV D-Test 16
MIL-STD-202 Method 107
-55 °C / +155 °C. Note: Number of cycles required:
300, Maximum transfer time: 20 s, Dwell time: 15
< ±1.0 %
minutes, Air - Air
ESD
AEC-Q200-REV D-Test 17
AEC-Q200-002 or ISO/DIS 10605
Verify the voltage setting at 500 V
< ±1.0 %
Solderability
AEC-Q200-REV D-Test 18
J-STD-202
Method B, aging 4 hours @ 155 °C dry heat.
Lead-free solder bath @ 235 ±3 °C
Dipping time: 3 ±0.5 seconds.
> 95 % area
covered with tin
Flammability
AEC-Q200-REV D-Test 20
UL 94
V-0 or V-1 are acceptable. Electrical test not
required.
V-0 or V-1
Board Flex (Bending)
AEC-Q200-REV D-Test 21
AEC-Q200-005
The duration of the applied forces shall be 60 +5
seconds
3 mm deflection (RLS06 ~ RLS 12)
2 mm deflection (RLS 25)
< ±1.0 %
Terminal Strength (SMD)
AEC-Q200-REV D-Test 22
AEC-Q200-006
Force of 1.8 kg for 60 seconds
Remarks: 0201-NA
< ±1.0 %
05/21
< ±2 %
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
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This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and its
affiliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
without notice. Users should check for and obtain the latest relevant information and verify that such information is current and
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The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns® product in a user application may vary
from the data sheet characteristics and parameters due to (i) the combination of the Bourns® product with other components
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