I'm not so sure about that - there seems to be quite a variation in quality and reliability (even leaving aside the occasional design or production issues that lead to recalls and complete counterfeits). I once had a play with some "competitively priced" breakers of a not-so-well-known-brand - from a reasonably well known wholesaler - and found that the thermal elements were so poorly calibrated that a 6A breaker failed to trip with a 10A current over several hours (it should have tripped (in standard conditions) in less than 1 hour at 1.45x6=8.7A) - needless to say the whole lot went back for a refund.
I'm not so sure about that - there seems to be quite a variation in quality and reliability (even leaving aside the occasional design or production issues that lead to recalls and complete counterfeits). I once had a play with some "competitively priced" breakers of a not-so-well-known-brand - from a reasonably well known wholesaler - and found that the thermal elements were so poorly calibrated that a 6A breaker failed to trip with a 10A current over several hours (it should have tripped (in standard conditions) in less than 1 hour at 1.45x6=8.7A) - needless to say the whole lot went back for a refund.
