Renogy 1-Pole DC Miniature Circuit Breaker

The Renogy 1-Pole DC Miniature Circuit Breaker protects DC electrical installations in solar systems, RVs, marine vessels, trucks, and off-grid cabins against overloads and short circuits. A combined thermal-magnetic trip mechanism handles both slow overloads and instantaneous fault currents, with a 6KA short-circuit breaking capacity. Available in 10A, 50A, and 63A ratings to match a range of DC circuit protection needs.

Dual-Mechanism Protection You Can Count On

The thermal-magnetic trip mechanism addresses two distinct fault types in a single breaker. The thermal element responds to sustained overloads by tripping after a delay, protecting wiring from heat damage caused by prolonged excess current. The magnetic element reacts to sudden short-circuit spikes, tripping in under 0.1 seconds to interrupt fault current before it can damage connected equipment or create a fire risk. Having both mechanisms in one unit means the breaker responds appropriately whether the fault builds slowly or strikes instantly.

Reset and Go: No Replacement Parts

After a trip event, the Renogy DC Miniature Circuit Breaker requires only a manual reset to restore the circuit. No fuse to locate, no replacement part to stock. The breaker can also be manually opened under full rated load for planned electrical maintenance without causing damage to the unit. A built-in indicator window shows contact position at a glance, so there is no guessing whether the breaker is open or closed during troubleshooting.

Straightforward DIN Rail Installation

The breaker snaps onto a standard DIN rail using a buckle design: seat the unit in the slot, press the bottom until the buckle engages, and the breaker is secured. Disassembly reverses the process by pulling down the buckle. Wiring is flexible: the reversible connection design accepts current in either direction, so polarity orientation during installation is not a constraint. The terminal accepts wire from 14 AWG to 4 AWG, covering a wide range of DC wiring gauges used in off-grid and mobile power systems.

Features

• Thermal-magnetic trip mechanism: handles both sustained overloads and instantaneous short-circuit faults
• 6KA short-circuit breaking capacity: rated operating and ultimate short-circuit breaking capacity both at 6KA
• Reversible connection: accepts bidirectional current; wiring direction is not fixed
• DIN rail mount: buckle design snaps onto standard DIN rail; no tools required to seat or remove
• Built-in indicator window: shows contact position (open or closed) at a glance
• Wide wire range: accepts 14 AWG to 4 AWG conductors

Specifications

Who This Is For and Isn't

The Renogy 1-Pole DC Miniature Circuit Breaker suits builders and installers protecting DC circuits in solar power systems, RVs, marine vessels, trucks, and off-grid cabins, wherever a resettable, DIN-rail-mounted DC breaker is needed in place of a fuse. The 10A through 63A range covers most charge controller, inverter, and DC load protection applications.

This breaker is rated for DC circuits at up to 250V and is not designed for AC circuit protection. The 1-pole design connects on the live wire only; it does not simultaneously interrupt both live and neutral conductors as a 2-pole breaker does. IP20 protection means the breaker is not rated for exposure to water or direct outdoor elements and should be installed inside an enclosure.

Common Questions

How do I choose the right amperage rating for my circuit?

For a controller, inverter, or DC device, divide the load wattage by the system voltage to find the maximum continuous operating current, multiply that figure by 1.25 to get the maximum current, then select the DC Miniature Circuit Breaker whose rated current is greater than and closest to that result. For a solar panel circuit, multiply the panel's short-circuit current by 1.25 twice (1.25 x 1.25) and select the breaker rated above that value.

What wire sizes does this breaker accept?

The Renogy 1-Pole DC Miniature Circuit Breaker accepts conductors from 14 AWG to 4 AWG. Terminals should be torqued to between 17.7 and 20.4 inch·lbs (2 to 2.3 N·m) for a secure connection.

What is the difference between a 1-pole and a 2-pole circuit breaker?

A 1-pole breaker like this one connects on the live wire only. A 2-pole breaker connects on both the live wire and the neutral wire, interrupting both simultaneously. Two-pole breakers generally support higher rated currents and working voltages than 1-pole models.

How does a circuit breaker differ from a fuse for DC protection?

A circuit breaker provides overload and short-circuit protection and can also be manually opened for maintenance; after a trip it requires only a reset, not a replacement part. A fuse provides overload and short-circuit protection only and must be physically replaced after it blows. The DC Miniature Circuit Breaker's thermal-magnetic mechanism also distinguishes between small-current delay trips and large-current instantaneous trips, which a fuse does not.

Does the breaker need to be wired in a specific direction?

No. The Renogy 1-Pole DC Miniature Circuit Breaker is designed for reversible connection and functions correctly under bidirectional current, so wiring direction during installation is not fixed.