QSF4053B - 400Amp Panel Switch

QSF4053B - 400Amp Panel Switch

The Zinsco QSF4053B panel switch delivers dependable power control for commercial and industrial systems. Rated for 400 amps and 600 volts AC, this three-phase, three-pole unit supports high-load applications with ease. Electricians prefer it for its bolt-in mount, which secures the switch firmly in place and simplifies installation. It accepts Class RK1 and RK5 fuses, allowing for flexible and reliable protection based on your setup. Whether you're upgrading older equipment or completing a new installation, this switch offers the performance and durability needed to keep your system running safely.

Key Features and Benefits

• Supports RK1 and RK5 Fuses – Choose the right fuse class for your system's safety and maintenance preferences.
• Bolt-In Mount Design – Secure the switch quickly and confidently into standard panelboards.
• 400 Amp / 600 Volt Capacity – Handle significant electrical loads with consistent performance.
• Three-Phase, Three-Pole Build – Distribute power evenly in demanding commercial and industrial systems.

Technical Specifications

• Amperage: 400A
  
• Voltage: 600V AC
  
• Poles: 3
  
• Phase: 3
  
• Dimensions:
  • Length: 13.75″
  • Width: 22.5″
  • Depth: 6.25″
• Unit Type: Fusible Single Unit, Type QSF
  
• Fuse Compatibility: Class RK1 and RK5
  

Material Compliance and Certifications

• Zinsco builds the QSF4053B to meet modern electrical safety standards. Each unit undergoes a thorough inspection to confirm it performs reliably under real-world operating conditions.

Where It Works Best

• Use the QSF4053B in commercial buildings, factories, or any high-demand facility that depends on stable, high-capacity electrical systems. It installs easily in both new and retrofit applications, making it a practical choice for professionals who expect reliability without added complexity.