Eaton 3S550B uninterruptible power supply

Who this is for

For the installer — this is the uninterruptible power supply supplied under Eaton part number 3S550B. Specify it by that part number.

In plain English: this is an uninterruptible power supply made by Eaton. The part number 3S550B is the manufacturer's own code for this exact version of it.

Similar-looking items in the same family often differ only by a suffix on that code. If you are replacing something, match the code rather than the picture.

Buying this in the UK

We are a UK supplier and this uninterruptible power supply is sold and shipped from the UK. Prices are shown in pounds sterling.

This item is non-returnable, excluding faulty goods.

The record for this part states no warranty term, so we do not quote one. Your statutory rights are unaffected either way.

Stock on this line moves, and lead times move with it. Ask us for the current position before you commit to a date on site.

Questions we get asked

Is this the exact uninterruptible power supply I have been quoted? Check the manufacturer part number 3S550B against your quote. That code is the only reliable identity for this item.

Is there a datasheet? Not on this listing.

What if I order the wrong version? Tell us the installation you are matching and we will work back to the part number with you. That is a faster conversation than a return.