General Electrics THHQB2120ST1 - 20 A, 2-Pole Bolt-On Circuit Breaker | AmpState

The General Electrics THHQB2120ST1 is a dependable 20A, 2-pole bolt-on molded case circuit breaker engineered to safeguard panelboards and load centers from overcurrent and short circuits. Built for durable performance, this unit delivers consistent protection in a compact, easy-to-install package.

• Bolt-on mounting ensures a rigid, vibration-resistant bus connection, reducing loose-term risks in panels subject to equipment movement or vibration.
• Thermal-magnetic trip unit provides stable, repeatable protection for both overloads and short circuits, helping prevent nuisance trips while maintaining fast response when faults occur.
• OEM-compatible design aligns with matching GE OEM load centers and panelboards for seamless replacement, upgrade paths, and dependable performance.
• 2-pole configuration protects two conductors (or a shared-neutral circuit), making it suitable for residential and light commercial electrical layouts.
• Versatile application ideal for residential, commercial, and light industrial installations that require reliable branch circuit protection and straightforward maintenance.

What this means in practice: if you’re updating a panel, retrofitting a small commercial distribution box, or stocking spare parts for routine service, the THHQB2120ST1 provides predictable protection where you need it most. Its 20A rating is well-suited for lighting circuits, receptacle branches, or controlled equipment racks, delivering consistent performance under normal operating conditions and during fault events.

Technical specifications

• Manufacturer: General Electrics
• Part Number: THHQB2120ST1
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the THHQB2120ST1 for a purpose-built solution that pairs with GE panelboards and load centers, delivering reliable, bolt-on protection for everyday electrical needs in homes, small businesses, and light industrial environments. Part of AmpState’s trusted lineup, this breaker is ready to install where durable performance and straightforward maintenance matter most.