- Thermal Protector
- Industrial Electrical
- DC Circuits – Miniature Circuit-Breakers For DC And Solar Generation
DC Circuit Breaker
Purpose-built for DC's punishing arcs: Langir miniature circuit breakers protect solar generation, battery storage, and DC distribution where AC breakers fall short.
DC Circuit Breaker Products
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35mm DIN Rail
A DIN rail or top-hat rail is a standardized 35 mm wide metal rail with hat-shaped cross section. It is widely used for mounting circuit breakers and industrial control equipment inside equipment racks. -
DC Circuit Breaker – Miniature Circuit Breakers for DC and Solar Generation
The JB is a DC circuit breaker dedicated to multi string photovoltaic installations. This circuit breaker protects cables between PV modules and inverter against overloads and short circuits. IEC 60947-2, EN60947-2, GB 14048.2 compliant. -
DIN Rail Support /Brackets /Mounting
DIN Rail Support /Brackets /Mount material for Cold-rolled steel treated with galvanic zinc plating and passivation. -
Electrical Busbar System
The Busbar System is an innovative way to jumper up to 57 poles of Manual Motor Controllers (MMC) and Supplementary Protectors (SP).
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Why Choose Langir DC Circuit Breakers?
Direct current never crosses zero, so a DC fault arc does not extinguish itself the way AC does — interrupting it demands dedicated arc-quenching design. Langir DC miniature circuit breakers are engineered from the ground up for this duty, providing the intentional weak link that protects photovoltaic strings, battery banks, telecom power, and vehicle systems from overload and short-circuit damage. DIN-rail mounting, coordinated busbar accessories, and multiple pole configurations make panel building straightforward, while robust thermal-magnetic mechanisms deliver dependable trips across years of service in energy installations.
Frequently Asked Questions About DC Circuit Breakers
Selection and application answers for DC-rated breaker installations.
AC arcs self-extinguish at each zero crossing; DC current is continuous, sustaining the arc. DC breakers use specialized arc chutes and contact geometry to force extinction safely.
Solar PV strings and combiners, battery energy storage, telecom DC plants, marine and vehicle circuits, and industrial DC distribution.
All models clip to standard 35mm DIN rail, and the Langir busbar system links adjacent breakers for clean, low-resistance supply distribution.
Thermal-magnetic operation: thermal elements catch sustained overloads while magnetic trips react instantly to short-circuit events.
Polarity and line/load orientation can matter depending on model design. Always follow the marked terminals and datasheet; our engineers can review your wiring plan.
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