1P 250V DC Miniature Circuit Breaker

For DC power systems such as solar combiner boxes, electric vehicle charging stations, and battery storage arrays, selecting a breaker that can reliably interrupt direct current is essential. Our 250V DC Miniature Circuit Breaker provides dependable overcurrent and short-circuit protection in a single-pole configuration rated up to 250 V DC. The compact design occupies only 18 mm of DIN rail width, making it ideal for space-constrained enclosures. Current ratings range from 6 A to 63 A, and the breaker achieves a 6 kA breaking capacity that rapidly extinguishes DC arcs. Its thermal-magnetic trip unit responds precisely to overloads and short circuits, protecting cables, inverters, and downstream components. The silver-alloy contacts minimize contact resistance and heat generation, while the arc chute cools and splits the arc for safe interruption. Designed for both residential and light commercial DC installations, this breaker delivers consistent performance in solar, telecom, and industrial control applications.

The 1P 250V DC Miniature Circuit Breaker features a non-polarized wiring design, allowing line and load connections to be reversed without affecting performance or safety. Its transparent housing provides a clear view of the contact state, and the trip-free mechanism ensures the breaker cannot be held closed during a fault condition. The toggle handle moves smoothly between ON and OFF positions, with red and green indicators for quick visual status checks. A wide operating temperature range from -25 °C to +70 °C makes it suitable for outdoor combiner boxes, unheated battery rooms, and other harsh environments. The breaker also supports optional accessories such as auxiliary contacts and shunt trips, enabling remote monitoring and control integration. Every unit undergoes factory testing for dielectric strength, thermal calibration, and mechanical endurance before shipment, ensuring long-term reliability in the field.

Key Product Parameters

• Pole configuration: 1 pole (1P)
• Rated voltage: 250 V DC
• Rated current range: 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A
• Breaking capacity: 6 kA at 250 V DC
• Trip curves: B, C, and D available
• Electrical endurance: 10,000 operations
• Mechanical endurance: 20,000 operations
• Mounting: 35 mm DIN rail
• Module width: 18 mm (1 module)
• Operating temperature: -25 °C to +70 °C
• Protection degree: IP20
• Certifications: CE, RoHS, TUV

Detailed Electrical and Mechanical Specifications