GE THQB2120ST1 - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the GE THQB2120ST1 — a 20A, 240V, 2-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. Its rugged bolt-on mounting creates a rigid, vibration-resistant bus connection, so you’re less likely to experience loose connections in environments with movement or vibration. This translates to steady performance and fewer nuisance trips over time.

Why this breaker stands out

• Bolt-on mounting: secure, rigid bus connection designed to stay put in demanding installation environments.
• Thermal-magnetic trip unit: combines heat-activated protection with fast magnetic response for stable, repeatable protection across varying temperatures and loads.
• OEM compatibility: built to work flawlessly with matching GE OEM loadcenters and panelboards for clean fitting and coordinated protection schemes.
• 2-pole design: simultaneously disconnects both hot legs for complete circuit isolation and safer shutdowns.
• 20A, 240V rating: ideal for common branch circuits such as outlets, lighting, and small commercial or residential loads that require solid overcurrent protection.

Where it fits best

This breaker is purpose-built for residential panelboards and loadcenters, as well as light commercial and small industrial enclosures. If you’re upgrading an aging panel or replacing a failed breaker, the THQB2120ST1 provides a reliable, codes-aligned protection solution that you can count on.

Technical specifications at a glance

• Manufacturer: GE
• Part Number: THQB2120ST1
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the GE THQB2120ST1 means prioritizing reliability, precise protection, and a seamless fit within your existing GE panel ecosystem. Its combination of secure mounting, robust trip performance, and compatibility with OEM load centers makes it a practical, long-term choice for professionals and knowledgeable installers working on residential and light commercial electrical systems.