Identifying mystery component

[M0LDY]

I have an old G-Comm 240Vac 13.8Vdc 25amp regulated power supply which has developed a faulty component (I have not seen one before) The small yellow/black/gold component (centre of picture) has started to explode when I switch on the power supply. There are tiny holes starting to appear on the component and obviously it wont last for much longer. Anyone have any idea?

thanks

 

[OLIVE2222]

It' probably a temperature dependant resistor used to limit the inrush curent. When powering the flowing current cause the resisitor to slowly decrease. Normally they used standard resistor color coding scheme.

 

[M0LDY]

Yes, have now solved the mystery component (from another forum), it is a thermistor and have now replaced it with one from an old pc power supply, the PSU is working fine again and I dont have to buy a new one