AC MCCB

The LDM9 Series molded case circuit breaker is designed for low-voltage power distribution systems that require reliable overload and short-circuit protection. With AC400V and AC690V working voltage options, multiple frame ratings, and flexible installation methods, it is suitable for industrial panels, photovoltaic systems, energy storage projects, grid distribution, inverter connections, and motor power supply circuits.

As an AC MCCB solution, the LDM9 Series helps improve electrical safety, simplify model selection, and support stable power management in demanding application environments.

• Wide current coverage: Available from 6A to 800A, covering 63A, 125A, 250A, 400A, 630A, and 800A frame ratings.
• Flexible breaking capacity: Standard, higher type, and highest type options support different fault-current requirements.
• Multiple pole options: 3P and 4P configurations are available for distribution and equipment protection systems.
• Practical installation: Supports front wiring, back panel wiring, and insertable wiring for different cabinet layouts.
• Accessory support: Optional shunt release, undervoltage release, auxiliary contacts, alarm contacts, electric operation, and turn handle operation.

This breaker is suitable for projects where stable circuit protection and flexible electrical configuration are required, including:

• Industrial distribution cabinets
• Low-voltage switchgear systems
• Photovoltaic and energy storage systems
• Grid-connected inverter systems
• Motor power supply circuits
• Commercial and factory electrical panels
• OEM electrical equipment

Recommended installation conditions include ambient temperature from -5°C to +40°C, altitude not exceeding 2000m, pollution level III, installation category III, and maximum installation inclination of ±22.5°. The product should be installed in a location free from explosive hazards, conductive dust, corrosive gases, rain, and snow exposure.

When selecting the correct model, confirm the rated current, frame size, pole number, breaking capacity level, tripping type, wiring method, and required accessories. For OEM or bulk orders, these details help ensure accurate technical matching and faster quotation preparation.

Need help choosing the right AC MCCB for your project? Send your required current rating, pole configuration, breaking capacity, installation method, and estimated order quantity. Our team can provide model guidance, technical data, and competitive quotation options.