Federal Pioneer QMQB4836B - 400A, 600V, 3-Pole Panelboard Switch / Switchboard Unit | AmpState

Federal Pioneer QMQB4836B is a 400 A, 600 V, 3-pole fusible panelboard switch designed for lighting and distribution panelboards. When paired with the appropriate upstream protection and fuse class, it delivers reliable load switching and overcurrent protection for downstream circuits, all within the panelboard footprint.

Three-pole design for true three-phase control

This is a true three-pole switch that supports balanced three‑phase systems. In faults or during maintenance, it disconnets all three phases in unison, ensuring complete isolation and reducing the risk of partial energization on downstream loads.

Key specifications

• Amperage: 400 A
• Voltage rating: 600 V
• Poles: 3
• Series: QMQB
• Manufacturer: Federal Pioneer / Federal Pacific
• Type: Fusible panelboard switch for lighting and distribution panelboards

What makes it unique

• Dedicated fusible switch integrated into a panelboard footprint, enabling synchronized disconnection of all phases.
• Part of the QMQB series, ensuring compatibility with Federal Pioneer panelboard layouts for straightforward installation and serviceability.
• Durable design optimized for dependable load switching and protective functionality in demanding commercial environments.

Ideal applications

• New installations or retrofits in commercial buildings, schools, retail environments, and light industrial facilities where a robust fusible switch is required within the panelboard footprint.
• Use as a protective interface for feeders and major circuits, enabling clean isolation during maintenance and fault events.

How it works

When used with appropriate upstream protection and fuse class, the QMQB4836B provides controlled disconnection and reliable overcurrent protection for downstream circuits. This facilitates rapid fault isolation and minimizes unnecessary interruptions across the broader electrical distribution network.

Installation and compatibility

Verify the device footprint matches your panelboard and ensure upstream protection is sized to the 400 A rating. The 3‑pole configuration is ideal for three‑phase distributions, and mounting aligns with standard Federal Pioneer panelboard layouts for straightforward installation and serviceability.

Why choose this Federal Pioneer panelboard switch

• Durable, predictable performance in lighting and distribution panelboards.
• Balanced load switching with integrated protection to simplify maintenance and improve safety.
• Reliable fault isolation that supports stable operation in busy commercial environments.

Note: Confirm compatibility with your panelboard footprint and upstream protection scheme in your project specifications.