Eaton R9M3400FJ - 400A, Fused Disconnect Switch

The Eaton R9M3400FJ is a rugged 400A fused disconnect switch engineered for demanding industrial and commercial environments where safe electrical isolation is non-negotiable. Built to perform reliably under continuous duty, this switch provides a clear, decisive disconnect that supports critical maintenance, testing, and emergency shutdown procedures.

Key reasons to choose this fused disconnect include its seamless integration with lockout/tagout programs, empowering technicians to work confidently without energizing the circuit. The fused design extends protection beyond simple isolation by helping interrupt fault currents and protect downstream equipment, contributing to safer operations and reduced downtime during fault events.

What makes the R9M3400FJ stand out

• 400A Amperage Rating: Handles high-current circuits with dependable performance in switchgear, power distribution, and motor control setups.
• Fused Disconnect Configuration: Combines isolation and overcurrent protection in a single, compact solution for streamlined electrical safety.
• Lockout/Tagout Compatibility: Designed to support standard safety protocols, helping ensure personnel safety during maintenance and testing.
• Reliable Disconnection Under Load: Delivers consistent, safe de-energization even when circuits are live, reducing risk during servicing.
• Long-Term Durability: Built to withstand industrial environments, delivering durable performance over time.

Ideal applications

Such a switch is well-suited for service entrances, motor control centers, electrical rooms, and distribution panels where dependable isolation and quick fault response are essential. Whether you're performing routine maintenance, executing system upgrades, or conducting fault isolation, the R9M3400FJ provides a trustworthy control point that technicians can rely on.

Why engineers choose Eaton

As a brand with a long-standing reputation for electrical safety and reliability, Eaton delivers carefully engineered components that complement existing protection schemes. The R9M3400FJ is designed to integrate smoothly with your safety and control architectures, helping you meet stringent safety standards while minimizing unnecessary complexity in your electrical infrastructure.

Specifications at a glance

• Amperage rating: 400A
• Product type: Fused Disconnect Switch
• Brand: Eaton
• Model: R9M3400FJ

Practical safety and maintenance tips

• Pair with proper lockout/tagout devices and updated tagging to ensure a secure workspace during servicing.
• Schedule regular inspections to verify fuse integrity and mechanical actuation, ensuring readiness for rapid disconnection when needed.
• Train maintenance personnel on identifying signs of wear or overheating in fused disconnects and the proper procedure for fuse replacement.