General Electrics THHQB32020ST1 - 20 A, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the General Electrics THHQB32020ST1, a 20A, 3-pole bolt-on molded case circuit breaker designed to safeguard your electrical system with reliability in panelboards and load centers. Built for straightforward installation and consistent protection, this unit helps you keep essential circuits protected from overcurrent and short circuits without sacrificing uptime.

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, reducing loose-term connections that can lead to heat build-up or nuisance trips.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal and magnetic sensing—efficiently handling both gradual overloads and sudden short circuits.
• Three-pole design offers robust protection for three-phase circuits and multi-pole configurations common in commercial and light industrial applications.
• OEM-compatible is designed to be used with matching OEM load centers and panelboards, ensuring a seamless replacement or upgrade without compatibility concerns.
• Versatile applications suitable for residential, commercial, and light industrial environments where dependable branch circuit protection is a must.

Why this 3-pole bolt-on MCCB stands out

In panel installations where panelboard space is at a premium and vibration is a consideration (think equipment rooms, basements, or service panels), the THHQB32020ST1’s bolt-on mounting provides a solid mechanical connection that resists movement and loosening over time. The thermal-magnetic trip unit is tuned for predictable performance, so you’ll experience fewer unexpected trips and easier troubleshooting when loads change or expand.

Ideal use scenarios

• Three-phase motor circuits in small industrial or commercial setups
• Protecting clustered branch circuits in service panels and main distribution panels
• Upgrades or replacements in OEM-load centers where a 20A, 3-pole protection device is required
• New installations that demand a durable, vibration-resistant breaker with precise trip characteristics

Specification snapshot

• Manufacturer: General Electrics
• Model: THHQB32020ST1
• Amperage rating: 20 A
• Poles: 3
• Mounting style: Bolt-on
• Trip technology: Thermal-magnetic
• Type: Molded case circuit breaker (MCCB)
• Applications: Branch circuit overcurrent and short-circuit protection

If you’re updating a panelboard or load center and need a dependable, high-availability protection solution, the THHQB32020ST1 delivers precise protection with durable construction. Its combination of secure mounting, stable trip behavior, and OEM compatibility makes it a practical choice for professionals and proactive maintainers who value consistent performance and long service life.