Square D Multi 9 C60SP Miniature Circuit Breaker – 4-Pole, 50A, B-Curve
The Square D (Schneider Electric) Multi 9 C60SP miniature circuit breaker (Model M9F21450) delivers reliable 4-pole branch circuit protection at 50A and 480Y/277V. The B-curve trip characteristic and 10 kA breaking capacity provide dependable overcurrent and short-circuit protection for industrial and commercial electrical systems.
Key Features
- 4-pole configuration for 3-phase plus neutral circuit protection
- 50A rated current for high-load branch circuits
- B-curve trip characteristic for moderate inrush current applications
- 10 kA breaking capacity at 480Y/277V
- Modular design for efficient panel integration
- Part of the Square D Multi 9 C60SP breaker system
Specifications
- Model: M9F21450
- Manufacturer: Square D (Schneider Electric)
- Poles: 4
- Amperage: 50A
- Voltage: 480Y/277V
- Breaking Capacity: 10 kA
- Trip Curve: B
Applications
Designed for 3-phase plus neutral distribution panels in industrial and commercial facilities. Suitable for motor feeders, HVAC systems, and other 4-wire, 3-phase plus neutral loads requiring 50A branch circuit protection at 480Y/277V.



