Overview
The Crouse-Hinds MJ-1359 Type MP-A circuit breaker is a 3-pole, 100 amp main breaker for AC power distribution systems. This unit delivers dependable thermal-magnetic protection with an instantaneous break function suitable for industrial and commercial installations. The molded-case design and robust construction ensure reliable service in demanding electrical environments where fast disconnection and overload protection are critical.
Key Features
- 100 amp rated capacity with 3-pole configuration
- Thermal-magnetic protection technology
- Instantaneous break mechanism for rapid fault clearing
- Manual trip lever control (switch-type operation)
- Designed for AC current applications
- Industrial-grade molded-case construction
- Black finish
Technical Specifications
- Amperage: 100 A
- Number of Poles: 3
- Type: MP-A
- Mechanism: Thermal-magnetic
- Current Rating: 100 A AC
- Control Style: Manual trip lever
- Finish: Black
- Manufacturing Origin: United States
Typical Applications
- Main feeder protection in industrial electrical panels
- Commercial power distribution systems
- Machine tool control centers
- Manufacturing facility branch circuits
- Heavy-duty load protection in motor control applications
Compatibility & Replacements
Compatible With
- Crouse-Hinds electrical panels and loadcenters
- Systems rated for 100 amp 3-pole AC circuit protection
- Industrial control centers requiring 3-phase main disconnection
- Eaton-compatible panelboards (post-acquisition)
Replaces / Drop-In Replacement For
- Other Crouse-Hinds MJ-series 100 amp 3-pole breakers
- Legacy Type MP-A units in the same amperage class
- Verify with your system integrator before substitution to ensure panel compatibility
Works With
- Crouse-Hinds (now Eaton) main panel assemblies
- Standard industrial electrical distribution equipment
- AC power systems (not rated for DC applications)
- Replacement or upgrade paths via Eaton CL-series or authorized equivalent breakers
