PR250 Series
THICK FILM POWER RESISTORS PR250
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
Electrical 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
From -55°C to +155°C
-Dielectric Strength
7000 Vac (12000 Vac x PR250T)
- Insulation resistance
> 105 MOhm a 500V
- Creep distance
42 mm (65 mm x PR250T)
- Air gap distance
16 mm (29mm x PR250T)
- 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 finishe
6.3μm Max
- Thermal grease
Required
- Max torque for contacts
2 Nm (static)
- Max torque for mounting
2 Nm (static)
- Weight:
100 g (130 gx PR250T)
- Options
- For values R039 <R< 1R0 is available Metal Foil type PR250M
- Cable terminals PR250C / PR250TC
