Sorry, didn't know which section to post this in...
I have a workshop dust extractor that keeps tripping the RCD and having taken it apart it looks like the capacitor has started to break down. The capacitor is one of these - https://uk.rs-online.com/web/p/film-capacitors/0238299

Anyone know a suitable alternative since that is discontinued? I'm in the UK, 240v 50Hz, that cap has 3 terminals is marked
0.1uF (x2)
0.005uF(y)+0.005uF(y)

I've looked on ebay etc. but not found anything similar. How critical is the capacitance, could I use different values?

 

The critical part is it should be motor start rated, although those values look awful small for motor start caps.
Can you give any details on the motor?

 

Thanks, this is the motor
https://www.pb-vac.co.uk/spares3.php?spareid=1030

 

Found this, looks close
https://www.ebay.co.uk/p/18023032501?iid=232903251844

would it do?

 

That motor like most similar vacuum motors is a universal motor, they don't have or need start capacitors. Your motor has brushes, again like most dirt/dust vacuums. Your caps must be for something else.

That said, many times RCD's have a hard time dealing with brushed motors. RCD's have a finite life time, after a number of "trips" they trip at a lower set point. So your RCD would be where I would look first, not the motor caps.

 

Agree with @shortbus , the motor definitely appears to be Universal (brushed) motor.
They can exhibit leakage through carbon dust over time.

 

Thanks guys, the capacitor looks a bit dodgy and that is the thing that trips the RCD so I've ordered the one linked above.