AMD 3 says "Product standards as listed in Appendix 1 for some protective devices, including RCCBs, RCBOs, circuit-breakers and AFDDs, require these devices to be marked to indicate if they are unidirectional e.g. “in” and “out” or “line” and “load” or arrows." - so no markings should indicate indicate that it's bi-directional.

   - Andy.

AMD 3 says "Product standards as listed in Appendix 1 for some protective devices, including RCCBs, RCBOs, circuit-breakers and AFDDs, require these devices to be marked to indicate if they are unidirectional e.g. “in” and “out” or “line” and “load” or arrows." - so no markings should indicate indicate that it's bi-directional.

   - Andy.

Or that it complies to an earlier version of the standard that pre-dates the need for such markings.

Not in this case, as it is very much a current device, but on older parts, beware...

Makers datasheet here does not mention anything.

That said I have always found them very helpful if you require a definitive statement

01543 455000 

info@electrium.co.uk

Mike.