RCBO or RCD type A or B Curve? diy-wiki update?

Probably both - just to confuse you!

The different RCD types are described in the last row of the table here under "Detection Characteristics" :

Their MCB section is also available with a choice of curve types:

I have improved some of the links between the RCD and MCB articles to better tie the relevant RCBO sections together. See if they make more sense now.

That is your classic "Type AC" RCD...

Yup, so it's MCB part has a thermal over current trip mechanism will respond like your typical type B MCB:

The RCD section will has a detection characteristic that is "Type A"

Type A does all the things your Type AC one does at the moment, and in addition (as it says in the wiki) :

"This type will do all the things a type AC device will, however it will also detect pulsed DC components in the leakage. So these are well suited to the protection of electronic devices with modern switched mode power supplies, that have a non sine wave output - typically that which results from rectification of the mains.

Well suited to single phase loads with electronic components, E.g.Inverters, Class 1 IT and AV/Entertainment equipment, PSUs for class

2 equipment, and appliances like washing machines, lighting controls, electric vehicle charging, and induction hobs. "

So a good choice for general purpose use.