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Used Molded Case Circuit Breakers (Mccb) in Missouri, USA

  • Trusted Seller
    Square D FH36030 Circuit Breaker

    Square D FH36030 Circuit Breaker 30 Amp 3 Pole 600 Vac

    • Manufacturer: Square D

    “Open boxNew - never used” The Square D FH36030 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 30 Amps and a voltage rating of 600VAC. It has an interrupting rating of 25kAIC at...

    $1,400 USD
    Latham, MO
  • Trusted Seller
    Square D FH36015 15 Amp

    Square D FH36015 15 Amp 600 Volt 3 Pole Circuit Breaker

    • Manufacturer: Square D

    “Open boxNew never used” The Square D FH36015 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 15 Amps and a voltage rating of 600VAC. It has an interrupting rating of 25kAIC at 4...

    $1,400 USD
    Latham, MO
  • Trusted Seller
    SQUARE D HGA36100 Circuit Breaker

    SQUARE D HGA36100 Circuit Breaker 100 A Amp 3 Pole 600V

    • Manufacturer: Square D

    “New - Open boxNever used!” The Square D HGA36100 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 100 Amps and a voltage rating of 600/690VAC. It has an interrupting rating of 35...

    $560 USD
    Latham, MO
  • Trusted Seller
    EATON CUTLER-HAMMER WMS2D10

    EATON CUTLER-HAMMER WMS2D10

    • Manufacturer: Eaton

    WMS SERIES, SUPPLEMENTARY PROTECTOR, TYPE WMS2D, 1PH, 2P, 240/480VAC, 10A, 10KA@240VAC/5KA@480VAC, CURRENT LIMITING, PLUG-IN, 35MM DIN-RAIL MOUNT, D CURVE, THERMAL MAGNETIC, MOLDED CASE CIRCUIT BREAKERS PHOTOS M...

    $362 USD
    Kansas City, MO

Overview

Molded case circuit breakers (MCCBs) are low-voltage protection devices that interrupt overloads and short circuits. They combine a molded insulating case with adjustable thermal-magnetic or electronic trip units, offering broad ampere ranges and high interrupting capacity. MCCBs are used in industrial panels, motor control and building distribution where precise trip settings and fault tolerance are required. Selection depends on frame size, trip type, voltage rating and interrupting capacity (kA).

FAQ

What should I consider when buying a used MCCB?

Check ampere rating, interrupting capacity (kA), trip unit type (thermal‑magnetic or electronic), frame vs. trip rating, physical condition, signs of overheating or corrosion, service history, and compatibility with your panel bus and standards.

How do I ensure an MCCB is shipped safely?

De‑energize and tag the breaker, protect and cap terminals, pack in a sturdy crate or pallet with moisture protection, immobilize the unit, use a carrier experienced with electrical equipment and insure the shipment.

What is a practical maintenance schedule for an MCCB?

Perform visual inspections monthly/quarterly, clean dust, torque terminals after installation, exercise trip mechanism and perform trip tests annually or per manufacturer, and run insulation/thermal checks yearly.