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Used controller in China

  • Trusted Seller
    140G-N5K4-E12 | Circuit Breaker

    140G-N5K4-E12 | Circuit Breaker

    • Manufacturer: Eaton Cutler-Hammer

    140G-N5K4-E12 Circuit Breaker 140G-N5K4-E12 Circuit Breaker The / Automation 140G MCB series is a series of molded case circuit breakers

    Fujian, China
  • Trusted Seller
    Schneider IC65N/A9F18232/EN 60898-1 Miniature circuit

    Schneider IC65N/A9F18232/EN 60898-1 Miniature circuit breakers

    • Manufacturer: Schneider

    Miniature circuit breakers Schneider IC65N/A9F18232/EN 60898-1 Miniature circuit breakers This part of IEC 60898 applies to a.c. air-break circuit-breakers for operation at 50 Hz, 60 Hz or 50/60 Hz, having a rate...

    Fujian, China
  • AEG Elfa Miniature Circuit Breaker

    AEG Elfa Miniature Circuit Breaker

    • Manufacturer: AEG

    The Elfa A6 series terminal distribution products integrate AEG's technical accumulation of circuit breakers, based on the innovation capability of circuit breakers and production control level, aiming to provide...

    China

Overview

Miniature circuit breakers (MCBs) are compact protective switches that interrupt electrical flow in low‑voltage circuits when overloads or short circuits occur. Widely used in residential, commercial and light industrial panels, they offer resettable protection and come in single‑ to multi‑pole versions, various current ratings, breaking capacities and trip curves. MCBs typically mount on DIN rails and use thermal‑magnetic mechanisms; select units that match local standards, busbar size and application requirements.

FAQ

What should I check when buying an MCB?

Verify the nominal current (In), breaking capacity (kA), trip curve (B, C, D), number of poles, mounting type (DIN rail), and compliance with local standards (IEC/UL). Check physical condition, brand reputation and whether spare parts or datasheets are available.

How should MCBs be packed and shipped safely?

Ship in original or padded boxes to protect terminals and housing. Secure against moisture and vibration, label fragile electrical components, and use a carrier familiar with electrical goods. Include compliance certificates for customs if shipping internationally.

What routine maintenance or testing do MCBs need?

Perform visual inspections, tighten terminal connections to torque specs, cycle switches periodically, and conduct insulation and trip tests with appropriate equipment. Replace units showing overheating, physical damage, or inconsistent trips.