QMQB3332C - 30A, 240V, 3-Phase, Fusible, Switch, NEMA 1

QMQB3332C is a compact, rugged fusible switch crafted for reliable on/off isolation and integrated overcurrent protection in demanding industrial and commercial environments. With a 30A rating at 240V and true 3-phase capability, this unit is built to keep critical equipment safe while simplifying panel layouts.

Designed to protect and streamline your electrical distribution, the QMQB3332C combines a switch and fusing in a single, maintainable package. Its NEMA 1 enclosure is suited for indoor, general-purpose installations where dust protection and basic ingress control are the priority, making it a practical choice for panelboards, motor disconnects, and branch circuits.

Key specifications

• Model: QMQB3332C
• Amperage: 30A
• Voltage: 240V
• Phase: 3-Phase
• NEMA Rating: NEMA 1
• Fusible: Yes (fusible switch)

Why this fusible switch stands out

• Integrated protection combines switching and fusing in one compact unit, reducing footprint and simplifying maintenance compared to separate disconnect and fuse solutions.
• Targeted for motor and branch circuit protection—perfect for motor disconnects in indoor panels and distribution circuits where quick, reliable isolation is essential.
• Rugged yet maintainable design supports routine fuse replacements and safe servicing without sacrificing uptime.
• 3-Phase 240V capability aligns with common commercial and light industrial motor loads, delivering consistent performance across three electrical phases.

Ideal use cases

• Motor disconnects in indoor panelboards and electrical rooms
• Branch circuit protection where space is constrained and a compact, maintainable fusible solution is preferred
• Indoor 3-phase distribution circuits requiring reliable isolation with integrated overcurrent protection

Installation and practical considerations

• Confirm fuse type and rating compatibility with the load and wiring diagram for your 3-phase 240V system
• Ensure the enclosure environment matches NEMA 1 expectations (indoor, general-purpose protection)
• Use standard lockout/tagout procedures during maintenance and fuse replacement to safeguard personnel

Who benefits most

• Facilities engineers and electrical contractors seeking a streamlined, maintainable protection solution
• Manufacturing and processing facilities with indoor 3-phase motors and panelboard assemblies
• Systems where quick, reliable isolation is as important as overcurrent protection

With the QMQB3332C, you get a dedicated, compact fusible switch that simplifies wiring, enhances safety, and keeps your 240V, 3-phase systems running smoothly. It’s the practical choice when you need dependable isolation plus built-in protection in a single, maintainable package.