Siemens 5SX21 Type B MCB's 50A, 40A, 32A, 20A, 16A, 10A, 6A  6K BSEN60898
All taken from functional boards.
Free 1st class post dispatched next working day ( same day, if complete by 3pm).
Any questions please ask.
I have loads more MCB's, Fuse's & carrier's, Control gear & other electrical items. Check my other Shop listings.