GE ABB THHQB2170 Circuit Breaker | 70 A, 120/240V , 2 Pole

The GE ABB THHQB2170 is a 70-amp, double-pole, thermal-magnetic bolt-on circuit breaker from the Q-Line series, designed for commercial and some residential load centers and lighting panels, specifically those requiring a more secure, bolted connection. It is a high-interrupting capacity version of the standard THQB breaker.

Features

• Amperage and Voltage: The breaker has a current rating of 70 amps and is rated for 120/240 VAC.
  
• Mounting Type: Unlike the plug-in THQL, the THHQB uses a bolt-on connection to the bus bars, which provides enhanced contact integrity and is often required by electrical codes for higher-amperage (over 30 A) and commercial applications.
  
• High Interrupting Capacity: With a 22 kAIC rating, it can safely clear much larger fault currents than standard 10 kAIC residential breakers.
  
• Thermal-Magnetic Protection: Uses a "Long-Time" thermal element for overload protection and an "Instantaneous" magnetic element for short-circuit protection.
  
• Quick-Make / Quick-Break: Features a mechanism that ensures the contacts open and close rapidly, independent of the handle speed, which extends the life of the contacts.
  
• Common Trip Bar: Since it is a 2-pole breaker, it features an internal common trip; if one pole trips, both poles will open simultaneously to prevent "single-phasing" a 240V load.
  
• Connection and Construction: It uses load-side lug terminals and accepts wire sizes ranging from 6 to 1/0 AWG for copper and 4 to 1/0 AWG for aluminum conductors. The case is made of heat-resistant thermoset material for durability.
  
• Safety and Standards: Features include a quick-make/quick-break mechanism, common trip bar, and easy-to-spot trip indication. It is UL Listed and CSA Certified and HACR rated, ensuring compliance with safety standards.