ABB / General Electric THQB1170 Miniature Circuit Breaker

This bolt-on breaker is designed for installation in GE A-Series panelboards, GE AQ lighting panels, and ReliaGear RQ panelboards. Verify your specific panel label to ensure it lists THQB frame breakers as an approved type.

Both are 1-inch wide, bolt-on Q-Line breakers used in the same panelboards, but they have different interrupting capacities. The THQB series is rated for 10kAIC, whereas the THHQB series provides a higher 22kAIC rating for commercial applications requiring greater fault current protection.

The load lugs accommodate 6 AWG to 1/0 AWG copper wire, or 4 AWG to 1/0 AWG aluminum wire. Ensure conductors are properly torqued to the manufacturer specifications printed on the breaker to prevent high resistance connections.

Yes, GE THQB circuit breakers are HACR rated. This makes them approved for use with heating, air conditioning, and refrigeration equipment that requires this specific safety designation.

Q-Line breakers feature a quick-make, quick-break mechanism with a center trip position. When a thermal overload or short circuit occurs, the handle moves to the middle, providing a clear visual indicator separate from the standard ON and OFF positions.

Bolt-on breakers secure directly to the panel busbar with a screw, providing a highly reliable, vibration-resistant connection. This makes them ideal for commercial and industrial environments where standard plug-in connections might loosen over time.

It utilizes a fixed thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) functions. The thermal element protects against sustained overloads, while the magnetic element responds immediately to short circuits.