ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Why it is called Diazed fuse?

I have NEVER seen the DI or DII 13 Amp diazed fuses.

Perhaps for export markets like the UK or some of the UK colonies where ring mains are used and a 13 Amp fused plug is used. although these are more of the ceramic tube type.

Seen the odd 2 and 4 Amp DII ones on control circuits.