NTC component

[boater sam]

I have a power board from a battery charger made by Mastervolt which fails to work. No service info found.  PRC item of course.
On the pcb is a component space marked "NTC". Assuming that this is negative temperature coefficient? But what?
It is about the size and thickness of a 5p piece, was dark green ceramic coated, 2 leads. It is in the mains input after a bunch of X and Y type caps, 2 MOVs and to ferrite cored inductors. I have mains on one side, the other now obviously has nothing.
Now blown to bits. The remains look to be a carbon disk with a lead each side. no visible markings left.

What is it please?  Any idea why it should be blown up, nothing downstream of it appears burnt or distressed?

[Murphyv310]

Inrush limiter perhaps?

[Ed_Dinning]

Or transient suppressor if "across" the mains

Ed

[boater sam]

Inrush limiter perhaps?

May be but what do I replace it with?

[boater sam]

Or transient suppressor if "across" the mains

Ed

Maybe but if it was OC would the supply still work without it? I thought that the MOVs were for that purpose?

[Murphyv310]

Inrush limiter perhaps?

May be but what do I replace it with?

Another one!!!
In all seriousness if its blown to bits I'd say there is a fault downstream.

[Mike Watterson]

Current rating estimate from power/ 240, but as Trevor says it's likely been clobbered. Probably it's a SMPSU and the main transistor is gone short. If you're lucky it's the rectifier (might be single or bridge). The NTC is likely to limit inrush to main cap after the rectifier. I bought a bunch of disc SMPSU thermistors to put in series behind light switches feeding halogens. Massive increase in life.