Siemens 3NP407 - 50A, Disconnect Switch

Siemens 3NP407 - 50A Disconnect Switch is a robust solution engineered for reliable on/off isolation and decisive overcurrent protection in demanding industrial and commercial environments. The 3NP407 model provides a compact, maintainable fusible switch that fits tightly in panelboards and motor control applications, delivering essential protection without sacrificing space or serviceability.

Why the 3NP407 stands out

When your facility requires a dependable point of isolation that also safeguards circuitry, the 3NP407 delivers. Its 50A rating is well-suited for common motor disconnects, branch circuits, and panelboard protection, making it a practical choice for equipment rooms, processing lines, and HVAC installations. The combination of a compact footprint and a maintainable design helps keep installations tidy and downtime minimal during routine servicing.

Key specifications at a glance

• 3NP407
• Amperage: 50A
• Application: Disconnects for motors, panelboards, and branch circuits requiring a fusible switch
• Design intent: Compact, maintainable fusible switch for reliable isolation and protection

Ideal use cases

• Motor disconnects in manufacturing lines where quick isolation is essential for maintenance and safety
• Panelboard protection where a compact, serviceable switch is needed in space-constrained installations
• Branch circuit protection in commercial or light-industrial settings, balancing control, protection, and footprint

Practical benefits

With the Siemens 3NP407, you gain a straightforward, field‑ready solution that aligns with everyday electrical protection needs. It provides clear separation of control and protection functions, enabling accurate maintenance workflows and safer, more reliable operation of critical equipment.