Eaton MPB1-TP

  • Product Name: MPB1 Series Thermal-Magnetic Motor Protection Circuit Breaker
  • Product Introduction: A compact DIN-rail mounted device combining manual disconnect switching and automatic protection (overload/short-circuit) for three-phase or single-phase AC motors.
Category:
Description
  • Technical Specifications & Performance Parameters:
    • Rated Voltage: 230/400 V AC, 50/60 Hz
    • Rated Current Range: 6 A to 63 A (adjustable thermal setting on some variants)
    • Trip Class: Thermal overload (inverse time), Magnetic short-circuit (instantaneous)
    • Breaking Capacity: High breaking rating per IEC 60947-4-1
    • Electrical Life: 10,000 operations, Mechanical Life: 20,000 operations
    • Protection: IP20 (finger-safe terminals)
  • Functional Features: Manual ON/OFF handle with clear indication; Test function (on some models); Trip-free mechanism; Can be combined with contactors for remote control.
  • Material & Structural Characteristics: Thermoplastic housing (UL94 V0); Silver alloy contacts; Bimetal strip for thermal sensing; Electromagnet for instantaneous trip.
  • Working Principle: Overload heats bimetal causing deflection to trip latch; Short-circuit generates magnetic field overcoming latch instantly; Manual lever physically opens contacts.
  • Installation Requirements: Snap onto 35mm DIN rail; Tighten terminal screws to specified torque; Ensure phase sequence matches motor; Derating may apply in high ambient temps.
  • Usage Precautions: Set thermal dial to motor FLA; Do not bypass or tape handle; Ensure proper coordination with upstream fuses; Reset only after fault cause is cleared.
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