Overview
The Toshiba M50B no-fuse breaker is a three-pole molded case circuit breaker (MCCB) rated for 16A operation in industrial electrical systems. This unit is part of Toshiba’s legacy M50B series, widely deployed in motor control centers, distribution panels, and load-shedding applications. The M50B series is known for reliable thermal-magnetic trip characteristics and compact form factor, making it a practical choice for retrofit and replacement installations where space and quick installation matter.
Key Features
- 3-Pole Configuration: Provides protection on all three phases of a 3-phase AC circuit
- 16A Thermal-Magnetic Trip: Responsive protection against overloads and short circuits
- No-Fuse Design: Eliminates need for expendable fuses; fully resettable after trip
- Industrial-Grade Construction: Molded case housing for durability and corrosion resistance
- Drop-in Compatibility: Compatible with standard MCCB mounting rails and bus bars
Technical Specifications
- Poles: 3
- Rated Current (A): 16
- Trip Type: Thermal-Magnetic
- Breaker Series: M50B
- Manufacturer: Toshiba Corporation
- Configuration: Molded Case Circuit Breaker (MCCB)
- Function: No-Fuse (Resettable)
Typical Applications
- Motor protection in industrial drive systems
- Branch circuit protection in power distribution panels
- Load-shedding and demand-side management systems
- Retrofit and replacement installations in existing control centers
- Three-phase equipment overcurrent protection
Compatibility & Replacements
Compatible With
- Standard industrial bus bar systems (600V class)
- Toshiba M50B-series mounting rails and enclosures
- Three-phase AC power systems (220V, 380V, 480V nominal)
- Motor control centers and distribution panels using MCCB formats
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. While the M50B series has been widely used across industrial facilities, direct replacement compatibility depends on your specific panel design, voltage rating, and historical configuration. Contact us with your existing breaker model number for accurate cross-reference information.
Works With
- Industrial power distribution systems (IEC 60947-2 compliant design)
- Three-phase motor starting and protection circuits
- DIN rail and bolt-down MCCB mounting systems
- Legacy and modern industrial control panels
