Hydraulic-magnetic circuit breakers offer superior protection for electrical systems by utilizing fluid dynamics and magnetic fields. Their reliability and precision make them crucial for safeguarding equipment and preventing electrical hazards in various applications. Selecting the appropriate breaker ensures optimal performance and longevity for your electrical infrastructure.
- 20 Amp, AC/DC, Black Toggle, Single Pole, ,Hydraulic Magnetic Circuit Breaker
- Side Screws: M4, Mounting Screws: #6-32
- 125/250/277/415/480 VAC; 65/80 VDC
- Regulatory Sepcification cUL 1077; TUV; RoHS; Cadmium free; EN60934; EN60947; CE
- 15 Amp Magnetic Hydraulic Circuit Breaker: Rated 125–415V AC and 65–80V DC; meets ABYC & UL standards for marine and vehicle safety.
- Combines an ON/OFF switch with dependable overload protection; Trip-Free design prevents forced closure during faults.
- This 15 amp single pole breaker uses hydraulic delay to ignore motor start-up spikes; rated 10,000 cycles, 6,000 at full load.
- Screw terminals accept heavy wire without crimp tools; a reusable 15 amp fuse replacement that simply resets after tripping.
- 30 Amp Magnetic Hydraulic Circuit Breaker: Rated 125–415V AC and 65–80V DC; meets ABYC & UL standards for marine and vehicle safety.
- Combines an ON/OFF switch with dependable overload protection; Trip-Free design prevents forced closure during faults.
- This 30 amp double pole breaker uses hydraulic delay to ignore motor start-up spikes; rated 10,000 cycles, 6,000 at full load.
- Screw terminals accept heavy wire without crimp tools; a reusable 30 amp fuse replacement that simply resets after tripping.
- 【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: 15A. Rated Frequency: 50/60 Hz. Trip Current: 18.75A. 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.
- 【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: 30A. Rated Frequency: 50/60 Hz. Trip Current: 37.5A. 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.
- Standards and Requirements: meets American Boat and Yacht Council (ABYC) standards and requirements, accredited by European CE, US UL, Canadian CSA, German VDE, TUV, Chinese CCC
- Details: 5Amp, single pole circuit breaker for boat, red toggle handle, #6-32(M3) screw, max voltage: 277VAC 50/60Hz 80VDC
- Mechanical Life: 10000 switching times at rated current and voltage.
- Protection: quick trip models are designed for electric circuit protection
- 【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: Double Pole. Rated Operational Voltage: AC250V. Rated Current: 50A. Rated Frequency: 50/60 Hz. Trip Current: 62.5A. 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.
- 20 Amp, AC/DC, White Toggle, Single Pole, ,Hydraulic Magnetic Circuit Breaker
- Side Screws: M4, Mounting Screws: #6-32
- 125/250/277/415/480 VAC; 65/80 VDC
- Regulatory Sepcification cUL 1077; TUV; RoHS; Cadmium free; EN60934; EN60947; CE
- 50 Amp, AC/DC, Black Toggle, Single Pole, ,Hydraulic Magnetic Circuit Breaker
- Side Screws: M4, Mounting Screws: #6-32
- 125/250/277/415/480 VAC; 65/80 VDC
- Regulatory Sepcification cUL 1077; TUV; RoHS; Cadmium free; EN60934; EN60947; CE
- 20 Amp, AC/DC, Red Toggle, Single Pole, ,Hydraulic Magnetic Circuit Breaker
- Side Screws: M4, Mounting Screws: #6-32
- 125/250/277/415/480 VAC; 65/80 VDC
- Regulatory Sepcification cUL 1077; TUV; RoHS; Cadmium free; EN60934; EN60947; CE
This article is part of our complete guide Plumbing & Electrical — browse all our comparisons and buying guides.
Last update on 2026-10-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Hydraulic-Magnetic Circuit Breakers
Understanding Trip Curves
The trip curve of a circuit breaker indicates how quickly it will interrupt the flow of electricity when an overload or short circuit occurs. Common curves range from B (fast-acting) to D (slow-acting). B curves are suitable for purely resistive loads, while C and D curves are designed for inductive loads like motors, which can draw higher inrush currents. Choosing the correct trip curve prevents nuisance tripping while still offering adequate protection.
Amperage and Voltage Ratings
Ensure the breaker's amperage rating matches or slightly exceeds the continuous current draw of the circuit it will protect. Over-sizing can lead to inadequate protection, while under-sizing will cause frequent tripping. The voltage rating must be equal to or greater than the system voltage. For instance, a 120/240V breaker can be used in a 120V system, but a 120V breaker should not be used in a 240V system.
Number of Poles
Circuit breakers come in single-pole, double-pole, and triple-pole configurations. A single-pole breaker protects one live conductor and is typically used for 120V circuits. A double-pole breaker protects two live conductors simultaneously and is used for 240V circuits or to ensure both wires of a 120V appliance are disconnected. Triple-pole breakers are used for three-phase power systems.
Environmental Considerations
Consider the environment where the breaker will be installed. Some breakers are designed for specific conditions, such as high humidity, corrosive atmospheres, or extreme temperatures. Look for breakers with appropriate NEMA or IP ratings if they will be exposed to dust or water. Proper selection ensures the breaker's integrity and operational safety.
