General Purpose Thick Film
Chip Resistor
WCR Series
•
Tolerances to ±0.5%
•
TCR down to ±50 ppm/°C
•
Zero ohm jumpers available
•
Wide ohmic range 1 ohm to 22M ohm
•
Now supplied with Pb-free terminations
Pb-free
Plating
IRC Advanced Film Division
Organic
Protection
Wrap-
around
termination
Glass
Passivation
Nickel
Barrier
Thick Film
Element
Specifications
Ohmic Range
P/N
TCR
(ppm/C)
±5%
±2%
±1%
±0.5%
Rated
Power at
70C
(milliwatts)
Max.
Working
Voltage
Max.
Overload
Voltage
Packaging
Carrier
Tape
Qty.
WCR0402
±200
±100
±50
4R7-1M
N/A
N/A
N/A
N/A
N/A
N/A
10R-1M
N/A
N/A
N/A
N/A
63
50
100
Card-
board
10K
WCR0603
±400
±200
±100
±50
1R0-9R76, 1M1-10M
10R-1M
N/A
N/A
1R0-9R76, 1M1-10M
N/A
10R-1M
N/A
1R0-9R76
N/A
10R-1M
N/A
1R0-9R76
N/A
N/A
1R0-1M
100
50
100
Card-
board
5K
WCR0805
±400
±200
±100
±50
1R0-9R76, 6M2-22M
10R-5.6M
N/A
N/A
N/A
1R0-10M
N/A
N/A
1R0-9R76, 1M1-10M
N/A
10R-976K
N/A
N/A
N/A
N/A
10R-1M
125
150
200
Card-
board
5K
WCR1206
±400
±200
±100
±50
1R0-9R76, 6M2-22M
10R-5M6
N/A
N/A
N/A
1R0-10M
N/A
N/A
1R0-9R76, 1M1-10M
N/A
10R-976K
N/A
N/A
N/A
N/A
10R-1M
250
200
400
Card-
board
5K
WCR1210
±400
±200
±100
1R0-9R76, 1M1-10M
10R-1M
N/A
N/A
10R-1M
N/A
1R0-9R76, 1M1-10M
N/A
10R-976K
N/A
N/A
10R-976K
250
200
400
Plastic
4K
WCR2010
±400
±200
±100
±50
1R0-9R76, 6M2-22M
10R-5M6
N/A
N/A
N/A
10R-1M
N/A
N/A
1R0-9R76, 1M1-10M
N/A
10R-1M
N/A
N/A
N/A
N/A
10R-976K
500
200
400
Plastic
4K
WCR2512
±400
±200
±100
±50
1R0-9R76, 6M2-22M
10R-5M6
N/A
N/A
N/A
10R-1M
N/A
N/A
1R0-9R76, 1M1-10M
N/A
10R-1M
N/A
N/A
N/A
N/A
10R-976K
1000
200
400
Plastic
4K
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.
© IRC Advanced Film Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
A subsidiary of
TT electronics plc
WCR Series Issue February 2005
General Purpose Thick Film
Chip Resistor
Dimensions (inches)
L
IRC Advanced Film Division
a
TOP
W
BO TT OM
SIDE
b
H
Model
WCR0402
WCR0603
WCR0805
WCR1206
WCR1210
WCR2010
WCR2512
L
0.039±0.002
0.063±0.008
0.079±0.008
0.125±0.009
0.126±0.008
0.197±0.008
0.248±0.008
W
0.020±0.002
0.032±0.008
0.049±0.008
0.063±0.008
0.102±0.008
0.098±0.008
0.122±0.008
H
0.014±0.002
0.020±0.005
0.020±0.005
0.024±0.005
0.024±0.004
0.024±0.004
0.024±0.004
a
0.008±0.004
0.012±0.009
0.016±0.009
0.020±0.013
0.020±0.012
0.020±0.012
0.020±0.012
b
0.010±0.002
0.012±0.009
0.012±0.009
0.016±0.008
0.016±0.008
0.016±0.008
0.016±0.008
Environmental Performance
Test Conditions
Short Time Overload
Temperature Cycling
Humidity
Load Life
High Temperature
Exposure
Low Temperature
Exposure
Effects od Solder Heat
Solderablitiy
Test Method
5 Seconds
2.5 X Rated Power
5 Cycles
-55°C to +125°C
1000 Hours
40°C ±2°C
90-95% RH
1000 Hours
70°C ±3°C
1000 Hours
125°C ±3°C
1000 Hours
-55°C ±3°C
10 ±1 Seconds 260°C
±5°C
3 ±0.5 Seconds 235°C
±5°C
Max Change (5%)
±2.0%
±0.5%
±3.0%
±3.0%
±1.0%
±1.0%
±1.0%
95% Min Coverage
Max Change (1%)
±0.75%
±0.5%
±1.0%
±1.0%
±1.0%
±1.0%
±0.75%
95% Min Coverage
© IRC Advanced Film Division
• Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
WCR Series Issue February 2005
General Purpose Thick Film
Chip Resistor
Power Derating Chart
% Rated Power
IRC Advanced Film Division
Temperature in °C
Ordering Data
Sample Part Number:
WCR - WCR1206LF - 1001 - F - P - LT
Tape & Reel Packaging
Tape Type
(P=Paper, E=Plastic)
Tolerance
J=±5%, G=±2%, F=±1, D=±0.5%
Model
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.
For additional information or to discuss your specific requirements,
please contact our Applications Team using the contact details below.
© IRC Advanced Film Division
• Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
WCR Series Issue February 2005
