1P 250V 10A DC Miniature Circuit Breaker

The 1P 250V 10A DC Miniature Circuit Breaker, manufactured and supplied by GreenWatt, is a protective circuit breaker suitable for low-voltage, small DC systems, widely used in small energy storage systems, DC lighting, power modules, and low-power DC equipment. As a mature product from a Chinese manufacturer, this DC Miniature Circuit Breaker features a thermal-magnetic trip mechanism, supports DIN rail mounting, provides dual overload and short-circuit protection, and boasts a compact design with a small footprint, making it suitable for home and small-scale engineering projects.

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Product Description

In small DC systems, line currents are generally low, but high reliability of protection is required. GreenWatt designed this 1P 250V 10A DC Miniature Circuit Breaker with a focus on space utilization, operational stability, and long-term operational safety.

It is primarily used for low-current DC circuit protection below DC 250V. Common applications include:

Home energy storage modules

Small photovoltaic DC-side circuits

DC LED lighting systems

DC power supplies for communication equipment

Low-power DC control systems

Technical Data Table

Item	Specification
Pole	1P, 2P, 3P, 4P
Rated Working Voltage (Ue)	250V DC (1P), 500V DC (2P), 750V DC (3P), 1000V DC (4P)
Frame Current	63A
Rated Current (In)	10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
Rated Insulation Voltage (Ui)	1200V
Rated Impulse Withstand Voltage (Uimp)	6kV
Tripping Characteristics	B/C
Tripping Type	Thermal Magnetic
Rated Ultimate Short-Circuit Breaking Capacity (Icu)	6kA
Rated Service Short-Circuit Interrupting Capacity (Ics)	6kA
Electrical Life	2000 Cycles
Mechanical Life	20000 Cycles
Overvoltage Category	III
Pollution Degree	3
Storage Temperature	-40°C ~ 85°C
Installation Method	DIN
Elevation	≤ 2000m
Dimension	Width: 18mm/Pole Height: 68mm Depth: 81mm
Weight	125.3g (1P), 250.55g (2P), 375.9g (3P), 501.1g (4P)

Functional Description

1.Overload Protection Mechanism

When the line current continuously exceeds the rated value of 10A, the internal thermal trip device will activate, causing the circuit breaker to trip and preventing the conductors from overheating for an extended period.

2.Short Circuit Protection Mechanism

In the event of a short circuit, the magnetic trip system can quickly interrupt the current, reducing the duration of the arc and lowering the risk of equipment damage.

3.Integrated Thermal-Magnetic Structure

This model adopts a Thermal Magnetic trip structure, responding separately under different current conditions, with clear operating logic and high stability.

Structure and Material Design

Flame-Retardant Housing

The housing is made of flame-retardant engineering plastic material, designed with safety as the primary consideration, suitable for long-term installation inside distribution boxes.

Copper Conductive System

The internal conductive components are made of high-quality copper, ensuring stable conductivity and keeping temperature rise within a reasonable range.

Modular Structure

With a width of only 18mm, it adopts a standard DIN rail mounting method, consistent with the installation method of conventional miniature circuit breakers, facilitating maintenance.