High Performance MCB

The LDB9-63 series miniature circuit breaker is designed for dependable overload and short-circuit protection in low-voltage AC distribution systems. It supports residential buildings, commercial facilities, industrial panels, lighting circuits, socket circuits, and small motor control applications.

With B, C, and D tripping characteristic options, clear contact position indication, durable front marking, and energy limiting class 3 performance, this breaker helps improve electrical safety while keeping panel installation and daily maintenance efficient.

• Complete circuit protection: Designed for overload and short-circuit protection in AC low-voltage distribution systems.
• Flexible current range: Rated current options include 2A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, and 63A.
• Multiple pole options: Available in 1P, 1P+N, 2P, 3P, 3P+N, and 4P configurations.
• B, C, and D trip curves: Supports protection for resistive loads, regular loads, small motors, and high-inrush circuits.
• Reliable breaking capacity: Rated short-circuit breaking capacity is 6kA.
• Clear status indication: A visible indication window below the handle shows ON/OFF contact position.
• Durable identification: Front printing is designed for long-term readability and easier maintenance.
• Enhanced safety design: Energy limiting class 3 and restricted ionized gas emission with 45mm grid distance.

This breaker is suitable for distribution circuits that need compact protection, clear switching status, and reliable tripping performance.

• Residential distribution boards
• Commercial building lighting and socket circuits
• Small motor circuits
• Industrial control and distribution panels
• Infrastructure and energy distribution systems
• Circuits requiring B, C, or D curve protection coordination

• Select the rated current according to load current, cable size, and protection coordination.
• Choose the tripping curve according to load type and expected inrush current.
• Confirm pole configuration and rated voltage before ordering.
• Use the specified terminal tightening torque to ensure safe conductor connection.
• Install the product in a suitable electrical enclosure; the protection level is IP20.
• Installation and maintenance should be performed by qualified electrical personnel after power isolation.

When selecting an LDB9-63 breaker, confirm rated current, pole number, tripping curve, breaking capacity, operating voltage, installation environment, and order quantity. For projects with mixed loads, use separate circuit protection selections for resistive, general, and high-inrush circuits.

Send us your rated current, voltage, pole configuration, tripping curve, breaking capacity requirement, and application scenario. Our team can help select the correct LDB9-63 configuration for safe and efficient low-voltage circuit protection.