Hi,

I'm wanting to replace an (unused) 45A MCB with a new 6A one for a new
circuit..

Are there different sorts of MCBs? And what are they.
(Just talking standard domestic installation here)

My current 'guess' is that there's:

1) Two sorts - mini ones that fit into something looking like an old-
style fuse holder, and 'ordinary' ones.

2) Various current ratings, obviously.

3) Various switching curves. 'Type A,B,C' etc. I want type B for a
'normal' house fuse? (What do the curves mean?)

Anything else? Are they all the same overall size, or do I need to buy
one that matches the consumer unit.