M50ASR325 - 400 Amp Panel Switch

M50ASR325 - 400 Amp Panel Switch

The M50ASR325 brings heavy-duty reliability to industrial power distribution. Designed as a 3‑pole bolt-in panel switch, it’s built to manage demanding electrical loads up to 400 Amperes at 600 Volts AC or less. Whether you’re upgrading a commercial control panel or outfitting a new industrial setup, this breaker delivers dependable fuse protection and long-lasting performance — so your equipment stays safe and operations stay steady.

Key Features and Benefits

• High‑capacity power handling: With a 400 A rating, this breaker accommodates large electrical loads, making it ideal for industrial machinery, HVAC systems, and main service panels.
• 3‑pole, 600 V AC service: Provides balanced phase protection for three-phase systems; a useful choice for factories, warehouses, and commercial buildings.
• Bolt‑in “M50” frame design: Simple to install in compatible panels; the bolt-in configuration ensures a secure fit with easy replacement and maintenance.
• Fusible protection with Class RK1 & RK5 compatibility: Accepts widely available RK‑style fuses, letting you tailor short-circuit protection precisely to your installation requirements.
• Single‑unit, compact construction: Despite handling significant power, it stays streamlined for efficient panel use without wasting space.
• Durable build for long service life: Constructed to withstand frequent switching and high currents while maintaining consistent performance under stress.

Technical Specifications

• Poles: 3‑Pole
  
• Current Rating: 400 Amperes
  
• Voltage Rating: Up to 600 V AC
  
• Frame Type: M50
  
• Breaker Style: Bolt‑in, fusible single unit
  
• Fuse Type Accepted: Class RK1 & RK5
  
• Dimensions (approx.): Height: 15.0"
  
• Shipping Weight: 23.5 lb
  

Material Compliance and Certifications

• Industry Standards: The M50ASR325 is built to meet standard industrial electrical codes and safety requirements, ensuring that fuse-protection circuits are executed according to accepted practices.
• Fuse Compatibility: Its compatibility with Class RK‑rated fuses makes it suitable for installations requiring UL-listed or code-compliant overcurrent protection.
• Mounting and Compliance: The bolt-in M50 frame helps ensure secure, code-friendly mounting, while the fusible configuration enables precise short-circuit protection and compliance with OSHA, NEC, or other regional standards when fuses are sized appropriately.

Where It Works Best

• Industrial facilities & factories — Ideal for powering heavy equipment, conveyors, motors, and compressors without overloading circuits.
• Commercial buildings with three-phase service — Perfect for HVAC systems, large lighting panels, or main service distribution.
• Retrofit or panel upgrades — Bolt-in design and standard frame size make it an efficient replacement in older installations requiring increased amperage or updated fuse protection.
• Custom control panels & switchgear builds — Offers a dependable building block for systems needing precise overcurrent protection with RK-class fuses.