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THQB1145
THQB1145
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THQB1145 Specifications
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THQB1145, General Electric, ABB, type THQB, P, PH, A, V, , 40?C, UL listed, Bolt-On, Thermal Magnetic, trip functions and load side lug terminal, molded case circuit breaker
| Manufacturer | General Electric | Subcategory | Molded Case |
| Family | Q-Line | Protection | Thermal Magnetic |
| Connection | Bolt-On | ||
| Manufacturer | General Electric | ||
| Subcategory | Molded Case | ||
| Family | Q-Line | ||
| Protection | Thermal Magnetic | ||
| Connection | Bolt-On |
Electrical.com is NOT an authorized distributor for Square D and therefore the manufacturer’s warranty does not apply. This product does include an Electrical.com 2 year warranty.
We can test, inspect and repair your THQB1145. All repairs include a 2-Year Electrical.com Warranty.
The THQB1145 is a -pole, amp, thermal-magnetic molded-case circuit breaker, originally developed by General Electric (GE) as part of its widely adopted THQB product line. This breaker is designed for use in 120 VAC single-phase branch circuits, commonly found in residential and commercial applications. Its bolt-on mounting style distinguishes it from the plug-on THQL variant, enabling it to securely fasten to the bus bar in GE panelboards such as PowerMark Gold™ and Spectra™ panels. The compact frame and standard dimensions make the THQB1145 ideal for protecting low-current circuits such as lighting, receptacles, or control wiring.
The THQB1145 uses a thermal-magnetic trip mechanism, which provides dual-level protection: a heat-sensitive bimetallic strip for overloads, and a magnetic coil for short-circuit events. This ensures reliable protection against both sustained overcurrent conditions and high-fault scenarios. The THQB1145 is UL 489 listed, rated for up to {aic rating} interrupting capacity, and supports standard copper or aluminum branch conductors (typically #14–#10 AWG). Its time-tested construction and standardized performance make it suitable for both new installations and service replacements in GE/ABB panel systems.
Since ABB acquired GE Industrial Solutions, the THQB series continues to be manufactured under the ABB brand, with full backward compatibility and ongoing support for legacy GE infrastructure. ABB maintains the specifications, certifications, and footprint of the original GE design, ensuring continued use in existing PowerMark and Spectra panelboards. The THQB1110 remains a reliable and code-compliant solution for low-amperage branch circuit protection in both residential and commercial load centers.
Purchase the THQB1145 at Electrical.com, your reliable partner for industrial and commercial electrical products including circuit breakers, panel boards, and accessories. Our selection includes manufacturers like General Electric and ABB, backed by a dedicated sales team ready to assist with technical questions, product selection, and support.