Best Thermal-Magnetic Circuit Breakers of 2026
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Thermal-Magnetic Circuit Breakers are essential components in any electrical system, providing protection against overloads and short circuits. These breakers operate on a combination of thermal and magnetic principles, with the thermal element detecting and reacting to overcurrent conditions and the magnetic element responding to short circuit faults. They are available in a wide variety of sizes and amperages, making them suitable for use in residential, commercial, and industrial applications. With their reliable and effective performance, Thermal-Magnetic Circuit Breakers are a must-have for any electrical installation.
At a Glance: Our Top Picks
Top 10 Thermal-Magnetic Circuit Breakers
SIEMENS Q250 50-Amp Double Pole Circuit Breaker
This double pole circuit breaker is a 50 Amp, 240V type QP circuit breaker with a 10,000 AIC interrupting rating. The Siemens type QP circuit breakers offer easy plug-in connections in Siemens enclosures and the time saving insta-wire feature. It is compatible with Siemens PL and ES series load centers and is intended for overload and short-circuit protection of your electrical system.
Leviton LB120-T
The Leviton LB120-T Circuit Breaker is a revolutionary addition to your electrical system. With its easy installation design, you can wire the entire Load Center without the need for any circuit breakers. The color indicators in the handle provide you with an intuitive way to check the operational status at a glance. Additionally, the rocker-style switches require less activation force compared to traditional circuit breakers, ensuring a comfortable user experience. This Leviton circuit breaker is perfect for anyone looking for convenience and efficiency in their electrical system.
Siemens HI Q130 30A Single Pole Breaker
The Siemens QP Circuit Breaker is a reliable 30-amp, single-pole breaker designed for 120V systems. It offers a high interrupting capacity of 10,000 amps, which means it can handle significant electrical faults safely, protecting your home wiring. The breaker easily plugs into Siemens enclosures, making installation straightforward and saving you time with the handy insta-wire feature. It’s also compatible with Siemens PL and ES series load centers, so you can trust it to fit seamlessly within your existing electrical setup. This breaker helps safeguard your electrical system from overloads and short circuits, giving you peace of mind.
Leviton LB115-T 15A Circuit Breaker
The Leviton LB115-T Breaker offers several user-friendly features that enhance your electrical system's performance. Its innovative design allows for easy wiring of the Load Center during installation, even before circuit breakers are added. You can quickly check the operational status thanks to the color indicators on the handle, providing peace of mind at a glance. The rocker-style switches are designed for comfort, requiring less effort to activate compared to traditional breakers, making your experience smoother. These features combine convenience and efficiency, ensuring you have a reliable and user-friendly circuit breaker for your needs.
Leviton LB230-T 30A Circuit Breaker
The Leviton 30A Circuit Breaker features a groundbreaking design that allows you to wire the entire Load Center at the rough-in stage without needing to install circuit breakers upfront. This makes your installation process much more efficient. You will appreciate the color indicators on the handle, which provide a quick visual status check. Additionally, the rocker-style switches are designed for ease of use, requiring less effort to activate than traditional breakers. This combination of features ensures a user-friendly experience, making your electrical work simpler and more convenient.
FalconSupply Square D HOM115 15A Circuit Breaker 2-Pack
The FalconSupply HOM115 Breakers come in a convenient two-pack of authentic 15-amp single-pole circuit breakers designed for your home’s electrical safety. These breakers offer reliable protection by quickly responding to both minor overcurrents and sudden short circuits, helping to prevent electrical hazards. They are specifically made to fit Square D Homeline panels, ensuring a secure and proper connection for your electrical system. With a 15-amp rating, these breakers are perfect for everyday circuits like lighting and outlets in bedrooms or living rooms. Plus, they meet strict safety standards and support a range of wire sizes, making installation straightforward and safe for your home projects.
Schneider Electric HOMT1520CP Square D Homeline Tandem Circuit Breaker
The Schneider Electric HOMT1520CP Square D Homeline Tandem Circuit Breaker is a 15/20 amp one-pole tandem circuit breaker, rated for 10,000 AIR and compatible with Homeline load centers and CSED devices. Its plug-on design makes it easy to install and it operates on 120/240 Vac. This breaker falls under the category of Arc Fault Circuit Breakers, offering you an extra layer of protection against electrical fires.
Leviton LB250-T
The Leviton LB250-T Circuit Breaker is a high-quality miniature circuit breaker that offers a range of convenient features. With Leviton's innovative design, the entire Load Center can be wired without the need for circuit breakers during the rough-in process. This saves time and effort during installation. The color indicators on the handle provide at-a-glance operational status, making it easy to identify whether the circuit breaker is on or off. Additionally, the rocker-style switches require less force to activate compared to traditional circuit breakers, ensuring a comfortable and effortless operation. The Leviton LB250-T Circuit Breaker is a reliable and user-friendly choice for any electrical circuit protection needs.
SIEMENS Q22030C Q22030CT Circuit Breaker
SIEMENS Q22030C Q22030CT Circuit Breaker is a thermal-magnetic circuit breaker that can save space and provide multiple functions for your electrical needs. It includes one 30-Amp double pole and two 20-Amp single pole breakers, all in a triplex 1/2-inch frame. The plug-in type design makes it easy to install and use. This circuit breaker is UL listed and can be used in Siemens EQ, Siemens Ultimate, ITE, and Gould load centers and meter combinations that are rated to accept type QT breakers. With its compact design, you can save space and have more flexibility in your electrical setup. Its multiple breakers provide more options for your electrical needs, and the ease of installation makes it a convenient choice for any user.
Siemens Double Pole Type QP Circuit Breaker
This double pole, 125 Amp, 240V type QP Circuit Breaker has a 10,000 AIC interrupting rating and is compatible with Siemens PL and ES series load centers. It provides easy plug-in connections and has a time saving insta-wire feature. Use it for overload and short-circuit protection of your electrical system.
Frequently Asked Questions (FAQs)
1. What is the difference between thermal and magnetic circuit breakers?
Thermal circuit breakers respond to heat, which is indirectly related to current flow, while magnetic circuit breakers are more responsive to excessive current flow. Both types are designed to respond to over-current events.
2. What are the advantages of a thermal magnetic circuit breaker?
A thermal magnetic circuit breaker offers both instantaneous and time-delayed protection. Instantaneous protection is useful for interrupting extremely powerful currents that are not part of normal operation, such as line-line faults, line-ground faults, and short circuits.
3. When would you use a thermal circuit breaker?
Thermal circuit breakers, also known as circuit protectors or resettable fuses, are commonly used for overload protection in motors, transformers, magnetic valves, on-board electrical systems, and low voltage lines.
4. What is the difference between thermal-magnetic and hydraulic magnetic?
One main difference between thermal-magnetic and hydraulic-magnetic circuit breakers is that the trip point of hydraulic-magnetic breakers is not affected by ambient temperature. Additionally, hydraulic-magnetic breakers can be immediately reclosed after tripping without any cooling down time required.
During our thermal-magnetic circuit breaker research, we found 24 thermal-magnetic circuit breaker products and shortlisted 10 quality products. We collected and analyzed 76,936 customer reviews through our big data system to write the thermal-magnetic circuit breakers list. We found that most customers choose thermal-magnetic circuit breakers with an average price of $15.80.
The thermal-magnetic circuit breakers are available for purchase. We have researched hundreds of brands and picked the top brands of thermal-magnetic circuit breakers, including SIEMENS, Leviton, FalconSupply, Schneider Electric. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.
Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.