Surface Mounted
Resistors
Welwyn Components
CR Series
• CECC released products
• Custom designs/sizes available
• Any resistance value available within specified range
• 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
CR0503
CR0805
CR1005
0.125
CR1206
CR2010
CR2512
Notes
Power rating at 70°C
Resistance range
watts
0.063
0.125
0.25
0.5
1.0
ohms 1R to 10M
1R to 100M
150
1R to 1M
400
Limiting element voltage
TCR -55° to +155°C
volts
50
100
200
500
ppm/°C
<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
Resistance tolerance
%
°C
See table of value ranges
Ambient temperature range
-55 to 155
Approved CECC 40401-004
Power rating at 70°C
Resistance range
CR0805
CR1206
watts
ohms
volts
0.125
0.25
1R to 10M
Limiting element voltage
TCR -55°C to +125°C
TCR +20°C to +70°C
Resistance tolerance
100
200
ppm/°C
ppm/°C
%
<10 ohms 200: 10 to 1M 100: >1M 200
<10 ohms 200: 10 to 1M 50: >1M 100
0.5, 1, 2, 5
See table of value ranges
Ambient temperature range
°C
-55 to +125
Approved CECC 40401-008
Power rating at 70°C
Resistance range
CR0805
CR1206
CR2010
0.5
CR2512
1.0
watts
ohms
0.125
1R to 10M
100
0.25
1R to 10M 1R to 1M
200 400
1R to 1M
500
Limiting element voltage
TCR -55°C to +155°C
volts
ppm/°C
<10 ohms 200: 10 to 1M ohms 100:
>1M ohms 250
Resistance tolerance
%
°C
0.1, 0.25, 0.5, 1, 2, 5
-55 to 155
See table of value ranges
Ambient temperature range
Approved CECC 40401-003
Power rating at 70°C
Resistance range
CR0805
CR1206
0.125
watts
ohms
0.063
1R to 3M
100
1R to 5M
200
Limiting element voltage
TCR -55°C to +125°C
volts
ppm/°C
<5 ohms 500: 5 to 10 ohms 350:
10 to 3M ohms 100: >3M ohms 250
0.25, 0.5, 1, 2, 5
Resistance tolerance
%
°C
See table of value ranges
Any value to order
Ambient temperature range
-55 to 125
Values
E24 & E96 preferred
Thermal impedance
°C/watt
800
360
290
200
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.
A subsidiary of
TT electronics plc
© 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
Issue F · 10.05
17