General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Nickel
Barrier
Thick Film
Element
Glass
Passivation
Wrap-
around
termination
Organic
Protection
• Tolerances to ±0.5%
• TCR down to ±100ppm/°C
• Zero ohm jumpers available
• Wide ohmic range from 1W to 10MW
• Now supplied with RoHS compliant terminations
Electrical Data
IRC
Type
TCR
(ppm/°C)
Ohmic Range (Ω)Rated Power
@ 70°C
(milliwatts)
Maximum
Working
Voltage
(V)
Maximum
Overload
Voltage
(V)
Operating
Temperature
Range
(°C)
±5% ±1%
WCR0201 ±300 10R - 91R 10R - 97R6 50 25 50
-55 to +155
±200 100R - 10M 100R - 1M
WCR0402
±400 1R0 - 10R 1R0 - 10R
63 50 100±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR0603
±400 1R0 - 10R 1R0 - 10R
100 50 100
±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR0805
±400 1R0 - 10R 1R0 - 10R
125 150 200±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR1206
±400 1R0 - 10R 1R0 - 10R
250 200 400±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR1210
±400 1R0 - 10R 1R0 - 10R
250 200 400±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR2010
±400 1R0 - 10R 1R0 - 10R
500 200 400±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
WCR2512
±400 1R0 - 10R 1R0 - 10R
1000 200 400±200 11R - 10M 11R - 100R
±100 N/A 101R - 1M0
General Purpose Thick Film
Chip Resistor
WCR Series
WCR Series Issue October 2009 Sheet 1 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Environmental Data
Test Conditions Test Method Max Change (5%) Max Change (1%)
Short Time Overload 5 seconds
2.5 X Rated Power ±2.0% +0.1Ω±1.0% +0.1Ω
Temperature Cycling 5 Cycles
-55°C to +125°C ±1.0% +0.1Ω±0.5% +0.1Ω
Humidity
240 Hours
40°C ±2°
90-95% RH
±3.0% +0.1Ω±1.0% +0.1Ω
Load Life
1000 Hours
70°C ±3°
1.5 hours on
30 minutes off
±3.0% +0.1Ω±1.0% +0.1Ω
Low Temperature Exposure 1000 Hours
-55°C ±3° ±1.0% +0.1Ω±1.0% +0.1Ω
Effects of Solder Heat 10 ±1 Seconds
260°C ±5° ±1.0% +0.1Ω±1.0% +0.1Ω
Solderability 3 ±0.5 Seconds
235°C ±5° 95% Min Coverage 95% Min Coverage
Model L W H a b
WCR0201 0.024±0.002 0.012±0.002 0.009±0.002 0.005±0.002 0.006±0.002
WCR0402 0.039±0.004 0.020±0.002 0.014±0.002 0.008±0.004 0.010±0.004
WCR0603 0.063±0.004 0.032±0.006 0.020±0.004 0.012±0.008 0.012±0.008
WCR0805 0.079±0.006 0.049±0.006 0.020±0.004 0.016±0.008 0.012±0.008
WCR1206 0.125±0.006 0.061±0.006 0.024±0.004 0.018±0.008 0.018±0.008
WCR1210 0.126±0.004 0.102±0.006 0.024±0.004 0.020±0.010 0.020±0.008
WCR2010 0.197±0.004 0.098±0.006 0.024±0.004 0.023±0.010 0.020±0.008
WCR2512 0.248±0.004 0.126±0.006 0.024±0.004 0.023±0.010 0.020±0.008
Physical Data (inches)
L
a
WH
b
SIDE
BO TT OM
TOP
General Purpose Thick Film
Chip Resistor
WCR Series Issue October 2009 Sheet 2 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
General Purpose Thick Film
Chip Resistor
WCR Series Issue October 2009 Sheet 3 of 3
Ordering Data
Sample Part Number WCR - WCR1206LF - 1001 - F - P - LT
Model
WCR00201LF, WCR0402LF, WCR0603LF, WCR0805LF
WCR1206LF, WCR1210LF, WCR2010LF, WCR2512LF
Resistance
3-digit resistance code for tolerances G and J.
4-digit resistance code for tolerances F and D.
Tolerance
J = ±5%, G = ±2%, F = ±1%, D = ±0.5%
Tape Type
P = Paper, E = Plastic
Tape & Reel Packaging
For additional information or to discuss your specific requirements,
please contact our Applications Team using the contact details below.
Power Derating Chart
25° 70° 155°
100
50
10
% Of Rated P ower
Temperature in °C
C
A
60mm ±1
B
ø178mm ±2 W
Size Tape Qty A
(mm)
B
(mm)
C
(mm)
W
(mm)
0201 Paper 15K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
0402 Paper 20K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
0603 Paper 5K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
0805 Paper 5K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
1206 Paper 5K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
1210 Paper 5K 2.0±0.5 13.0±0.5 21.0±0.5 10.0±1
2010 Paper 4K 2.0±0.5 13.0±0.5 21.0±0.5 13.8±1
2512 Plastic 4K 2.0±0.5 13.0±0.5 21.0±0.5 13.8±1
Packaging Reel Physical Data
