Surface Mounted
Resistors
Welwyn Components
CR Series
• CECC released products
• 100% high temperature and overload screened
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•
•
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•
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versions available for high reliability applications
Terminations available for wire bonding or soldering
Available in sizes down to 0503
Resistance range 1 ohm to100M ohms
Tolerances down to 0.1%
Solder terminations have a nickel barrier layer
Shorting Links available
Electrical Data
Commercial
Power rating at 70°C
Resistance range
Limiting element voltage
TCR -55° to +155°C
Resistance tolerance
Ambient temperature range
watts
ohms
volts
ppm/°C
CR0503
0.063
1R to 10M
50
%
°C
Approved CECC 40401-004
Power rating at 70°C
Resistance range
Limiting element voltage
TCR -55°C to +125°C
TCR +20°C to +70°C
Resistance tolerance
Ambient temperature range
watts
ohms
volts
ppm/°C
ppm/°C
%
°C
Approved CECC 40401-008
Power rating at 70°C
Resistance range
Limiting element voltage
TCR -55°C to +155°C
watts
ohms
volts
ppm/°C
Resistance tolerance
Ambient temperature range
Approved CECC 40401-003
Power rating at 70°C
Resistance range
Limiting element voltage
TCR -55°C to +125°C
Resistance tolerance
Ambient temperature range
CR0805
0.125
CR1005
CR1206
CR2010
CR2512
0.125
0.25
0.5
1.0
1R to 100M
1R to 1M
100
150
200
400
500
<10 ohms 350: 10 to 100 ohms 200:
100 to 1M ohm 100: >1M ohm 250
0.1, 0.25, 0.5, 1, 2, 5
-55 to 155
CR0805
0.125
CR0805
CR1206
CR2010
0.125
0.25
0.5
1R to 10M
1R to 10M 1R to 1M
100
200
400
<10 ohms 200: 10 to 1M ohms 100:
>1M ohms 250
0.1, 0.25, 0.5, 1, 2, 5
-55 to 155
%
°C
Values
Thermal impedance
See table of value ranges
CR2512
1.0
1R to 1M
500
See table of value ranges
CR0805
CR1206
0.063
0.125
1R to 3M
1R to 5M
100
200
<5 ohms 500: 5 to 10 ohms 350:
10 to 3M ohms 100: >3M ohms 250
0.25, 0.5, 1, 2, 5
-55 to 125
watts
ohms
volts
ppm/°C
See table of value ranges
E24 & E96 preferred
°C/watt
800
See table of value ranges
CR1206
0.25
1R to 10M
100
200
<10 ohms 200: 10 to 1M 100: >1M 200
<10 ohms 200: 10 to 1M 50: >1M 100
0.5, 1, 2, 5
-55 to +125
%
°C
Notes
360
290
200
Any value to order
80
70
Mounted on custom
designed PCB’s
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
02 . 08
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