Interlocked Circuit Breaker

The Interlocked Circuit Breaker is designed for applications that require reliable line switching, overload protection, and short-circuit protection within a compact modular device. Unlike a standard miniature circuit breaker, this product uses a mechanical interlocking structure to prevent two connected circuits from being closed at the same time. When one side is switched on, the other side remains open, helping users manage manual power transfer safely and reducing the risk of incorrect operation in dual-power or line conversion systems.

This breaker is suitable for residential distribution boards, commercial electrical panels, light industrial control circuits, backup power transfer points, small generator changeover systems, and other circuits where controlled switching between two power lines is required. Its structure combines circuit protection and manual transfer capability, making it a practical choice for installers, panel builders, and OEM electrical equipment manufacturers.

• Mechanical Interlock Design: The interlocking mechanism ensures that two circuits cannot be energized simultaneously. This supports safer power conversion and helps avoid back-feed or improper switching during manual transfer operation.
• Integrated Protection Functions: The product provides short-circuit protection, overload protection, control function, isolation function, and dual power supply switching in one modular device.
• Flexible Current and Pole Options: Rated current options cover 1A to 63A, with 1P, 2P, 3P, and 4P structures available for different distribution layouts and project requirements.
• Reliable Operation for Distribution Loads: With B, C, and D curve options, the breaker can be selected for semiconductor circuits, regular distribution loads, cables, motors, transformers, and other loads with higher starting current.

This product is recommended for power conversion circuits, dual-source distribution boards, backup supply switching, control panels, small commercial distribution systems, and load-side protection circuits. It is especially useful in places where a simple manual transfer method is needed while still maintaining overload and short-circuit protection. The product can be installed on a TH35-7.5 standard DIN rail, making it compatible with common modular electrical enclosures and panel designs.

Selection should be based on rated current, pole configuration, load type, and required tripping curve. B curve is suitable for circuits with lower short-circuit current or sensitive electronic loads. C curve is commonly used for regular distribution loads and cables. D curve is recommended for equipment with larger starting current, such as motors or transformers. During installation, polarity, terminal position, and conductor size should be checked carefully. Recommended terminal torque is approximately 2.5N for 1A to 32A products and 3.5N for 40A to 63A products.

The product should be installed in an environment without strong vibration or mechanical impact. It is designed for locations below 2000m altitude and provides Class 2 damp-heat resistance, supporting operation under high relative humidity conditions when properly installed. For long-term reliability, installers should check terminal tightness, confirm correct switching action, and verify that only one side can be closed at a time before the circuit is placed into service.

For buyers looking for a compact switching and protection device, the Interlocked Circuit Breaker offers a balance of safety, practical installation, and reliable manual operation. It helps simplify panel design by combining transfer switching and circuit protection in one modular solution. For bulk orders or OEM projects, customers can provide required current rating, pole number, tripping curve, application scenario, and estimated order quantity to receive suitable product recommendations and quotation support.