Thermistor - 8 amp 2.5 ohm R25
The thermistor is installed in the power box of Williams/Bally
WPC System pinball machines in series with the black power line
wire.
It limits the inrush current when the machine is first turned on.
This mitigates stress failures of power handling semi-conductors
further downstream in the power supply system. This part will be
warm to the touch.
Symptoms of cold machine resets when the flippers are activated
may be caused by a bad thermistor.
Reference:
- Williams (WMS): 5016-12978-00
- Stern Pinball, Inc. (SPI): 150-5006-00
- Amphenol: CL-30
0.11
oz