Frequently Asked Questions - Breaker
No, it's best if you bring in the old breaker and match it up. If you know the name of the brand of service box, we could also match it that way.
Usually the problem is simply an overload and you only need to run fewer appliances on the circuit. However, if it is not overloaded and it keeps tripping, you should suspect a short. Also, look for a defective cord, socket or plug.