Datasheet

Series CR V I T R O H M
Precision Power Wirewound Resistors ,
ceramic carrier, coated, axial
Specifications
Type
CR
251-0
CR
252-0
CR
253-0
CR
254-0
CR
255-0
CR
256-0
CR
257-0
CR
258-0
CR
259-0
Nominal Power rating P
40
1,1 2,0 2,5 3,0 3,3 4,0 5,0 5,5 7,2
P
70
W
1,0 1,6 2,0 2,5 3,0 3,5 4,3 5,0 6,5
Resistance range
Ω
See Page 2
Tolerances
%
Rmin. …Rmax.: ±5, ±2, ±1; R≥ 1R: ±0,5
Temperature coefficient
10
-6
*
K
-
1
See Page 2
Max. working voltage
V
RMS
Insulation voltage (1min.)
V
RMS
max 75 V
Insulation resistance
Ω
not insulated
Derating linear
ºC
70…350 (0W)
Climatic category 55/200/56
Temperature range
ºC
-55 ~ 350
Thermal resistance
KW
-1
125 100 85 65 55 65 48 45 35
Failure Rate
(Total, ϑ
0
, max, 60% cont. lev.)
10
-9
h
-1
appr. 100 depends on value
Endurance (P
70 ,
70°C, 1000h)
[∆R/R] %
± 3,0 average
Damp heat, steady state
(40°C, 93% r.h., 56d)
[∆R/R] %
± 1,0
Climatic sequence
(IEX 115-1/23)
[∆R/R] %
± 1,0
Terminal strength
[∆R/R] %
± 0,2
Terminal Tensile Strength
N
40 50
Resistance to soldering heat
(260°C, 3,5s)
[∆R/R] %
± 0,2 typ.
Solderability
s
2,5 Flowtime; solderglobule test, IEC 60068-2-20-T
Marking Printed in clear
Revision 200906
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