Ultra Precision
Metal Film Resistors
CAR series
Welwyn Components
•
Tolerance down to 0.01%
•
Low TCR’s
•
High reliability
•
Superior moisture performance
•
Non standard values available
•
Highest stability metal film available
•
Matched sets and networks
Electrical Data
CAR5
Power rating at 70°C
Power rating at 85°C
Resistance range
Limiting element voltage
TCR (20 to +70°C)
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
°C/watt
°C
110
watts
watts
ohms
volts
ppm/°C
%
0.25
0.125
10R0 to 3M
250
CAR6
0.33
0.25
10R0 to 5M
350
CAR7
0.5
0.33
10R0 to 10M
500
See tolerance/TCR
combinations
below
60
Notes
5(V), 10(T), 15(Y), 25(D), 50(C)
0.01(L), 0.02(P), 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1(F)
E24, E96 preferred
70
-55 to +155
Table of Resistance Restrictions
Tolerance
TCR
ppm/°C 0.01-0.02%
5
10
15
25
50
50 to 300k
50 to 300k
50 to 300k
50 to 300k
50 to 300k
CAR5
0.05%
10 to 500k
10 to 1M
10 to 1M
10 to 1M
10 to 1M
0.1-1%
10 to 500k
10 to 1M
10 to 1M
10 to 1.5M
10 to 3M
0.01/0.02%
50 to 500k
50 to 500k
50 to 500k
50 to 500k
50 to 500k
CAR6
0.05%
10 to 500k
10 to 1M
10 to 1M
10 to 1M
10 to 1M
0.1-1%
10 to 500k
10 to 1M
10 to 1M
10 to 3M
10 to 5M
0.01-0.02%
50 to 750k
50 to 750k
50 to 750k
50 to 750k
50 to 750k
CAR7
0.05%
10 to 750k
10 to 1M
10 to 1M
10 to 1M
10 to 1M
0.1-1%
10 to 750k
10 to 1.5M
10 to 3.5M
10 to 5M
10 to 10M
Physical Data
Dimensions (mm) and Weight (g)
PCB
mounting
Type
CAR5
CAR6
CAR7
L Max
7.2
10.0
15.5
D Max
2.5
3.7
5.5
f min
30
30
30
d nom.
0.6
0.6
0.8
centres
10.2
12.7
18.4
Min
Bend
Radius
0.6
0.6
1.2
Wt.
nom.
0.24
0.40
1.15
d
D
L
f
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
Issue B · 03.02
© 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
178
WELWYN [ WELWYN COMPONENTS LIMITED ]
