Page 3 of 7 WR20, WR25 ( Automotive )_V02 Jan.2011
QUICK REFERENCE DATA
Item General Specification
Series No. WR20 WR25
Size code 2010 ( 5025 ), 2512(6432)
Resistance Tolerance
±5% (E24); ±1% (E24+E96)
Resistance Range
1Ω ~ 10MΩ, Jumper (0Ω)
± 200 ppm/°C ± 200 ppm/°C
± 100 ppm/°C ± 100 ppm/°C
TCR (ppm/°C) R≦ 10Ω
10Ω < R ≦1MΩ
> 1MΩ
± 200 ppm/°C ± 200 ppm/°C
Max. dissipation at T
amb
=70°C
0.5 W 1W
Max. Operation Voltage (DC or RMS) 200V 250V
Max. Overload Voltage (DC or RMS) 400V 500V
Climatic category (IEC 60068) 55/155/56
Note :
1. This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication
60115-8”
2. Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
ValueResistancePower RatedRCWV ×=
or Max. RCWV listed above, whichever is lower.
3. The resistance of Jumper is defined <0.05Ω.
DIMENSIONS (unit : mm)
TYPE
WR20 WR25
L
5.00±0.20 6.40±0.20
W
2.50±0.20 3.20±0.20
T
0.55±0.10 0.60±0.10
Tt
0.65±0.25 0.65±0.25
Tb
0.60±0.25 0.90±0.25
