53 3-Pole Type THQB Q-Line miniature circuit breaker is rated at 30-Amps and 240-Volt AC. Interrupt rating of this circuit breaker is 10-Kilo-Amps. It accommodates copper wire of size 14 - 8-AWG and aluminum wire of size 12 - 8-AWG. Miniature circuit breaker features fixed thermal-magnetic, non-interchangeable, LI and internal common trip functions. This 3-Phase bolt-on mountable breaker is suitable for reverse feed, residential and commercial applications. It has quick-make/quick-break mechanisms and easy to spot trip indication to ensure safety and reliability. It measures 3-Inch x 2-3/8-Inch x 3-9/32-Inch. Miniature circuit breaker is UL listed.