ABB / General Electric THQL2125 Miniature Circuit Breaker

As a standard Q-Line miniature circuit breaker, it is 1-inch wide per pole. This 2-pole breaker will occupy two 1-inch spaces (2 inches total) on your panel bus.

THQL breakers are full-size 1-inch per pole breakers, whereas THQP are space-saving half-inch breakers. You can only substitute a THQL breaker if your load center has two full 1-inch spaces available and the panel diagram permits standard Q-Line installation in those specific slots.

Yes, this breaker carries an HACR rating. It is fully certified for use as overcurrent protection for heating, air conditioning, and refrigeration systems that specify a 25-amp maximum breaker size.

The box lug terminals for the 15A to 30A THQL series breakers should be torqued to 35 in-lb. Always confirm torque values printed directly on the breaker label to ensure a secure, code-compliant connection.

Yes, the terminal lugs accept 14-8 AWG copper and 12-8 AWG aluminum conductors. When terminating aluminum wire, always apply a listed oxide-inhibiting joint compound to the stripped wire to prevent corrosion and ensure safe, long-term operation.

The standard THQL2125 is rated for 10 kAIC at 120/240VAC. If your electrical system requires a higher fault current rating, the direct upgrade is the THHQL2125, which provides a 22 kAIC rating in the exact same physical footprint.