Best replacement fuse

[73buick]

Just got in a huge HP color laser printer that was hit with a surge. I immedietly found a blown fuse in the power supply. Its a Hollyland 51MS (Medium slow blow) 125V/8A fuse. Its nominal melting I2T is 167. Blow times are 100%: 4hrs min., 135% 1hr max, 200%, 20sec. max. Looking on digikey, the closest I can find is a littlefuse 232 series. The 232 series has a melting I2T of 182, the blow times are the same at 100% and 135%, but 200% is 2.25sec max. Should that be close enough?

[stj]

Re: Best replacement fuse

8a slowblow 125v minimum is all you need to be concerned with
make sure it's ceramic NOT glass though

[fzabkar]

Re: Best replacement fuse

Did you test the components downstream of the fuse? One or more may be shorted.

[73buick]

Re: Best replacement fuse

The original fuse wasn't ceramic, according to the hollyland spec of the 51MS.

[stj]

Re: Best replacement fuse

maybe, but if something shorts out and blows a glass fuse hard, the glass can shatter.
you really should use ceramics on mains!

[budm]

Re: Best replacement fuse

'Just got in a huge HP color laser printer that was hit with a surge.' Is the MOV (surge protector device) which is connected after the main fuse OK?

[clearchris]

Re: Best replacement fuse

MOVs get "used up". When they do finally fail, they tend to fail closed circuit and result in flames.

If it did sustain a big strike, I'd probably replace it, but I'm overly cautious.