QSF4033B w/ Mounting Kit - 400Amp Panel Switch

QSF4033B w/ Mounting Kit - 400Amp Panel Switch

The Zinsco QSF4033B is a 400-amp, 3-phase panel switch that comes ready to install with its own mounting kit. It’s a solid option for electricians looking to keep things simple without cutting corners on quality. Whether you're replacing an older unit or setting up new service, this switch fits right into most commercial and industrial setups. It’s built to handle real-world conditions and gets the job done without a lot of fuss.

Key Features and Benefits

• Mounting Kit Included: No extra hardware needed—just install and go.
• Fusible Design: Works with Class RK1 and RK5 fuses. Easy to maintain and provides solid overcurrent protection.
• Straightforward Installation: Bolt-in style makes setup quicker and more stable.
• Reliable Performance: Rated for 400 amps at 250 volts AC, it’s made to handle serious power loads.

Technical Specifications

• Amperage: 400 Amps
• Voltage: 250 Volts AC
• Phases: 3
• Poles: 3
• Switch Type: Fusible, single unit
• Mounting: Bolt-in with kit included
• Fuse Type: Class RK1 & RK5
• Size:
  • Length: 13.75"
  • Width: 22.5"
  • Depth: 6.25"

Material Notes and Compliance

• This unit was built using components and methods in line with the manufacturing standards of its time. It’s a dependable piece of equipment, and the mounting kit adds a little extra confidence during install—especially in heavy-use areas.

Where It Works Best

• Great for industrial panels, commercial buildings, warehouses, and anywhere a high-capacity, easy-to-service panel switch is needed. It’s built for reliability in systems that don’t have room for failure.