Plumbing & Electrical

The Best Magnetic Circuit Breakers

1 min read WeKompare Editorial Team Products verified: July 17, 2026 10 products compared

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Protecting your home or workshop from electrical overloads and short circuits is paramount. Magnetic circuit breakers offer a reliable and responsive solution, tripping quickly to prevent damage. Understanding the key factors involved in selecting the right breaker ensures optimal safety and performance for your electrical system.

No. 1
Magnetic Hydraulic Circuit Breaker, A Series, 30 A, 2 Pole, 277 V, 5 kA
Magnetic Hydraulic Circuit Breaker, A Series, 30 A, 2 Pole, 277 V, 5 kA
  • Price For: Each Product Range: A Series Current Rating: 30A No. of Poles: 2 Pole Input Voltage VAC: 277V Trip Time: - Interrupting Capacity: 5kA Dielectric Strength: 1.5kV
$83.12
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SaleNo. 2
Siemens Q120 20-Amp Single Pole Type QP Circuit Breaker
Siemens Q120 20-Amp Single Pole Type QP Circuit Breaker
  • Single pole, 20 Amp, 120V 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
−36% $8.48 Amazon Prime
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No. 3
Q220 20-Amp Double Pole Type QP Circuit Breaker
Q220 20-Amp Double Pole Type QP Circuit Breaker
  • Double pole, 20 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
  • Accepts #14-8 AWG AI wire
$15.90
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SaleNo. 4
Blue Sea Systems 7353 AC/DC C-Series Single Pole Magnetic CA1 White Circuit Breakers (20 AMP)
Blue Sea Systems 7353 AC/DC C-Series Single Pole Magnetic CA1 White Circuit Breakers (20 AMP)
  • Max Voltage: 250V AC/ 80V DC, Interrupt Capacity: 5,000A @ 125V AC, 5,000A @ 250V AC, 10,000 @ 80V DC
  • Provides overcurrent protection for inverters, bow thrusters, and windlasses
  • Combines switching and circuit protection into a single device
  • "Trip Free"—cannot be held closed after trip
  • Compatible with AC and DC systems for the stated amperage
−12% $43.16 Amazon Prime
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SaleNo. 5
Q115 15-Amp Single Pole Type QP Circuit Breaker
Q115 15-Amp Single Pole Type QP Circuit Breaker
  • Single pole, 15 Amp, 120V 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
  • Accepts #14-6 AWG Cu or #14-6 AWG Al wire
  • Thermal-magnetic
−38% $7.98 Amazon Prime
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No. 6
20 Amp Single Pole Toggle Magnetic Circuit Breaker, AC 250V, for Marine, RV and Automation Devices
20 Amp Single Pole Toggle Magnetic Circuit Breaker, AC 250V, for Marine, RV and Automation Devices
  • 【Complete Protection】: This hydraulic-magnetic circuit breaker utilizes advanced magnetic trip technology. When the current exceeds the set range, it automatically cuts off the power, effectively preventing circuit overloads and short circuits...
  • 【Specifications】: Pole: Single Pole. Rated Operational Voltage: AC250V. Rated Current: 20A. Rated Frequency: 50/60 Hz. Trip Current: 25A. Rated Breaking Capacity: 2000A.
  • 【Durable & Reliable】: The manual reset switch offers a mechanical life of 10,000 operations. At rated load, it maintains an electrical life of 6,000 cycles. This breaker is built with robust materials to guarantee long-term, stable performance.
  • 【Easy Installation】: The size is designed to be small and compact, saving space. It requires no complex wiring, enabling simple and quick installation.
  • 【Wide Application】: Perfectly suited for yachts, marine vessels, RVs, campers, industrial automation equipment, and more.
$17.99
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No. 7
Blue Sea Systems 7202 AC / DC Single Pole Magnetic World Circuit Breaker, Black
Blue Sea Systems 7202 AC / DC Single Pole Magnetic World Circuit Breaker, Black
  • Package Dimensions: 1.778 H x 8.636 L x 6.35 W (centimetres)
  • Country of Origin : Mexico
  • Package Weight: 0.05 pounds
  • Combines switching and circuit protection into a single device
$22.55 Amazon Prime
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No. 8
Leviton LB120-T 20A 1-Pole Plug-On Standard Branch Circuit Breaker, Thermal Magnetic, 120 VAC, White
Leviton LB120-T 20A 1-Pole Plug-On Standard Branch Circuit Breaker, Thermal Magnetic, 120 VAC, White
  • 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.
$12.02 Amazon Prime
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No. 9
Chtaixi AC Miniature Circuit Breaker, 20 Amp 120V/240V 1 Pole
Chtaixi AC Miniature Circuit Breaker, 20 Amp 120V/240V 1 Pole
  • FUNCTIONS: Used to protect 110V 120V 220V 230V AC circuit from overload and short circuit damage, and can also be used for control and isolation.
  • CURVE C: Magnetic trip range 5-10 times rated current.
  • QUALITY: Silver alloy contacts, flame retardant material shell, color indicator.
  • APPLICATION: Can be used in solar ac systems, RV, home circuits, or other 50/60Hz AC systems.
  • INSTALLATION: Screw clamp wires, 35mm DIN rail mount.
$7.99
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No. 10
Chtaixi AC Miniature Circuit Breaker, 32 Amp 120V/240V 2 Pole DIN Rail Mount Circuit Breaker, Thermal Magnetic...
Chtaixi AC Miniature Circuit Breaker, 32 Amp 120V/240V 2 Pole DIN Rail Mount Circuit Breaker, Thermal Magnetic...
  • FUNCTIONS: Used to protect 110V 120V 220V 230V AC circuit from overload and short circuit damage, and can also be used for control and isolation.
  • CURVE C: Magnetic trip range 5-10 times rated current.
  • QUALITY: Silver alloy contacts, flame retardant material shell, color indicator.
  • APPLICATION: Can be used in solar ac systems, RV, home circuits, or other 50/60Hz AC systems.
  • INSTALLATION: Screw clamp wires, 35mm DIN rail mount.
$12.87
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Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Magnetic Circuit Breakers

Understanding Magnetic Circuit Breaker Types

  • Thermal-Magnetic: These are the most common type. They combine a bimetallic strip (for thermal overload protection) and an electromagnet (for short-circuit protection). They are suitable for general-purpose applications.
  • Magnetic-Only: These breakers rely solely on an electromagnet to detect and interrupt fault currents. They are often used in applications where rapid tripping is crucial, such as motor protection, as they are less susceptible to nuisance tripping from heat.

Key Specifications to Consider

  • Amperage Rating: This indicates the maximum current the breaker can handle continuously. It must be matched to the circuit's expected load and wire gauge. Using a breaker with too high an amperage rating defeats its protective purpose.
  • Voltage Rating: Ensure the breaker's voltage rating meets or exceeds the system voltage it will protect. Common ratings include 120V, 240V, and 480V.
  • Interrupting Capacity (AIC): This is the maximum fault current the breaker can safely interrupt without damage. It should be higher than the potential short-circuit current at the installation point.
  • Number of Poles: Single-pole breakers protect one 120V circuit, double-pole breakers protect two 120V circuits or a single 240V circuit, and triple-pole breakers are used for three-phase power.

Installation and Compatibility

  • Ensure the breaker is compatible with your existing electrical panel or enclosure. Check the brand and series for proper fit and function.
  • Follow all local electrical codes and manufacturer instructions for safe installation. If you are not experienced with electrical work, consult a qualified electrician.

Frequently Asked Questions

What is the difference between a thermal and a magnetic trip?
A thermal trip uses a bimetallic strip that heats up and bends when current exceeds a safe level for an extended period, protecting against overloads. A magnetic trip uses an electromagnet that reacts instantly to high fault currents, protecting against short circuits.
How do I determine the correct amperage rating for a breaker?
The amperage rating should be chosen based on the continuous current draw of the circuit and the wire gauge used. It should be sized to protect the wiring from overheating, typically matching the wire's capacity.
Can I use a breaker with a higher voltage rating than my system?
Yes, you can use a breaker with a higher voltage rating than your system, but never one with a lower rating. Using a breaker with a lower voltage rating is a safety hazard.
What does interrupting capacity (AIC) mean?
Interrupting capacity (AIC) refers to the maximum fault current a circuit breaker can safely interrupt without sustaining damage. It's crucial to select a breaker with an AIC rating sufficient for the potential fault current at its installation point.
Are magnetic circuit breakers suitable for motor protection?
Yes, magnetic-only breakers are often preferred for motor protection because they react quickly to short circuits without nuisance tripping from the heat generated during normal motor operation.