Thermal-magnetic circuit breakers are essential safety devices designed to protect electrical circuits from overcurrents and short circuits. Selecting the appropriate breaker ensures reliable operation and prevents potential damage to equipment and wiring, safeguarding your home or facility.
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- INTUITIVE - Color indicators in the handle show operational status at-a-glance
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
- Two 30-Amp double pole
- Quadplex 1/2-Inch frame
- Plug in type
- Space Saving
- UL listed
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- INTUITIVE - Color indicators in the handle show operational status at-a-glance
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- INTUITIVE - Color indicators in the handle show operational status at-a-glance
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
- Double pole, 50 Amp, 240V type QP Circuit Breaker
- 10,000 AIC interrupting rating
- Siemens type QP circuit breakers provide easy plug-in connections in Siemens enclosures and the time saving insta-wire feature
- Compatible with Siemens PL and ES series load centers
- Use for overload and short-circuit protection of your electrical system
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- SAFE - Leviton GFCI, AFCI and dual-function circuit breakers feature patented reset lockout technology, and will not reset if ground or arc fault protection is comprimised.
- INTUITIVE - LEDs communicate trip condition and type of fault, and remain illuminated even when tripped.
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
- FUNCTIONS: Used to protect 48~500VDC OR 90~480VAC circuit from overload and short circuit damage and 12~48VDC from overload damage, and can also be used for control and isolation. Size: 54MM x 80MM x 75MM, Fit for 35mm DIN rail.
- Breaker Switch has built-in arc squelching magnet which enables the high arc extinguisher,flame-retardant enclosure, silver alloy contacts, and sufficient pure copper coils to ensure its high quality.
- Come with 1 x DIN rail, 2 x screws for easy mounting and 4 x copper crimp terminal for wiring to make sure that the wires are tightly connected.
- This Solar Disconnect Switch is suitable for photovoltaic solar panel array,Solar Charge Controller,Batteries,Power inverter,DC motor protect and also suitable for ac systems, RV, home circuits, or other 50/60Hz AC systems.
- FAST TRIP: The electromagnetic trip system can trip immediately when the circuit is short-circuited to protect the safety of the circuit.
- Non-polarized circuit breakers do not require polarity distinction and can be connected in either direction, simplifying installation and reducing wiring errors. They are particularly suitable for applications where polarity may reverse, such...
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- INTUITIVE - Color indicators in the handle show operational status at-a-glance
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
- EASY - Leviton's revolutionary design allows the entire Load Center to be wired at rough-in without any circuit breakers present.
- INTUITIVE - Color indicators in the handle show operational status at-a-glance
- COMFORTABLE - Rocker-style switches require less activation force than traditional circuit breakers.
This article is part of our complete guide Plumbing & Electrical — browse all our comparisons and buying guides.
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Thermal-Magnetic Circuit Breakers
Amperage Rating
The amperage rating, measured in amperes (A), indicates the maximum current the breaker can safely handle before tripping. It's crucial to match this rating to the circuit's load capacity to prevent nuisance tripping or inadequate protection. Consult your electrical panel or device specifications for the correct amperage.
Number of Poles
Circuit breakers come in single-pole, double-pole, and triple-pole configurations. Single-pole breakers protect one 120-volt circuit, typically for lighting and outlets. Double-pole breakers are used for 240-volt appliances like water heaters or central air conditioners, interrupting both hot wires simultaneously. Triple-pole breakers are generally for three-phase power applications.
Trip Curve Type
Thermal-magnetic breakers have different trip curve types (e.g., Type B, C, D) that define how quickly they react to overcurrents. Type B breakers trip at 3-5 times the rated current and are suitable for resistive loads like lighting. Type C breakers trip at 5-10 times the rated current, offering better protection for inductive loads such as motors. Type D breakers trip at 10-20 times the rated current, ideal for high inrush current applications.
