PR254 Series
Thick film power resistors
Features
Very good ratio Power / Volume
Easy mounting and wiring with significant cost advantages.
Non inductive performance for high frequency applications.
One models for power applications up to 500W.
Suited to ULV94-V0 application.
Technical Specifications
- Power rating
250W (heatsink at 100°C)
- Resistance range
From 1R0 to 1MOhm, E12 series
- Tolerance
Standard 10%, up to 1% on request
- Temperature coefficient
±100 ppm/°C
- Max Work. Voltage
5000 Vac
- Work Temp. Range
- Dielectric Strength
7000 Vac (12000 Vac x PR250T)
- Insulation resistance
> 105 MOhm a 500V
-Creep distance
42 mm (65 mm x PR254T)
-Air gap distance
16 mm (29mm x PR254T)
- Partial discharge
< 10 pC @ 5000 Vac
- Self inductance
80 nH
- Parallel capacitance
40 pF
- Capacitance to heatsink
< 120 pF
- Overload
4 Pn x 10 s
- Thermal resistance
0.15 °C/W
- Heatsink flatness
0.05 mm Max
- Heatsink surface finish
6.3μm Max
- Thermal grease
Required
- Max torque for contacts
2 Nm (statico)
- Max torque for mounting
2 Nm (static)
- Weight
125 g (155 g x PR254T)
-Options
Cable terminals PR254C / PR254TC





