Bussmann ER1-400N3PB - 400A, Disconnect Switch

Bussmann ER1-400N3PB is a robust 400A disconnect switch purpose-built for industrial and commercial environments that demand safe, reliable electrical isolation. Engineered to support lockout/tagout procedures, this disconnect ensures dependable disconnection under load, delivering peace of mind for maintenance crews and facility operators alike. Built to endure demanding service conditions, it stands ready to protect personnel and equipment during critical shutdowns and routine servicing.

• 400A amperage rating provides ample capacity for medium- to large-scale electrical systems with room to spare for safe isolation during servicing.
• NEMA 1 enclosure designed for indoor installations, offering solid protection in typical electrical rooms and controlled environments.
• Lockout/tagout ready compatible design supports standardized safety procedures to prevent accidental energization during maintenance.
• Reliable under-load disconnection ensures a clean, prompt break in the circuit without compromising safety or equipment integrity.
• Durable, long-term performance built to withstand frequent disconnections and routine operation in busy industrial setups.
• Brand and model—Bussmann ER1-400N3PB—combines trusted engineering with straightforward integration into existing power distribution schemes.

Ideal for electrical rooms, motor control centers, service entrances, and distribution panels, the ER1-400N3PB serves as a decisive safety valve in any installation that requires a dedicated disconnect switch. Whether you’re upgrading an aging panel, replacing a failing disconnect, or configuring a new line-side isolation point, this unit delivers precise control, predictable performance, and clear compliance support.

Key use cases include routine maintenance shutoffs, emergency shutdown workflows, and routine system isolation to perform repair work without exposing personnel to live circuits. Compared to generic switches, the ER1-400N3PB offers a specialized combination of high current capability, indoor-rated protection, and lockout/tagout compatibility designed for real-world industrial use.

Technical snapshot

• Amperage Rating: 400A
• Enclosure Rating: NEMA 1
• Product Type: Disconnect Switch
• Brand: Bussmann
• Model: ER1-400N3PB