QMQB4032B - 400Amp Panelboard Switch

QMQB4032B - 400Amp Panelboard Switch

The Federal Pacific QMQB4032B is a dependable 400 amp, 250 volt, 3-pole fusible panelboard switch built for real-world commercial and industrial electrical systems. It’s the kind of component professionals choose when they want consistent performance and straightforward operation in high-load environments. Designed with a quick-make, quick-break mechanism, this switch allows circuits to be engaged or disconnected cleanly and confidently. Its ability to accept Class RK1 and RK5 fuses gives installers flexibility when configuring or maintaining panelboard systems, making it a practical fit for many applications where reliability matters.

Key Features and Benefits

• High Interrupting Capacity helps protect electrical systems when faults occur, even in demanding installations.
• Quick-Make, Quick-Break Action supports safer switching and smoother operation during routine use or maintenance.
• Heavy-Duty Bolt-In Design provides a solid, secure fit within panelboards, helping the switch stay firmly in place over time.
• Dual Fuse Compatibility with Class RK1 and RK5 fuses makes system planning and servicing more convenient.

Technical Specifications

• Voltage Rating: 250 VAC
• Current Rating: 400 Amps
• Poles: 3
• Compatible Fuse Classes: RK1, RK5
• Dimensions (Approx.): 22.25" W x 13.75" H x 6.25" D

Material Compliance and Certifications

• UL-98 Listed, confirming the switch meets established safety and performance requirements for enclosed and dead-front switch applications.

Where It Works Best

• The QMQB4032B panelboard switch is best suited for commercial and industrial panelboards that require dependable 400-amp circuit control. It’s commonly used in facilities such as manufacturing plants, distribution centers, and large commercial buildings where electrical systems must operate safely under sustained loads. Whether part of a new installation or an upgrade to an existing setup, this switch delivers steady performance and peace of mind for professionals responsible for power distribution.

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