ABB OS400J03 - 400A, 600V, Fused Disconnect Switch

Overview

Introducing the ABB OS400J03, a high-performance fused disconnect switch engineered for industrial and commercial environments where safe electrical isolation is non-negotiable. With a robust 400A rating and a 600V capacity, this device provides dependable disconnection under load while supporting rigorous lockout/tagout procedures. Its fused design delivers reliable protection and long-term durability, reducing downtime and enhancing personnel safety.

Why this matters

Safe isolation is the foundation of reliable maintenance and fault handling. The OS400J03 is built to perform in demanding real-world conditions, delivering clear, reliable disconnection when you need it most and compatible with standard lockout/tagout practices to keep technicians protected during servicing.

Key Features

• 400A amperage rating suitable for large motors, feeders, and heavy-duty distribution circuits.
• 600V voltage rating to align with common industrial power systems.
• Fused disconnect design for overload protection and a definitive open/isolated state when the circuit is de-energized.
• Lockout/tagout compatibility to ensure safe, compliant maintenance procedures.
• Industrial-grade construction designed for enduring performance in tough environments.

Specifications

Brand: ABB

Model: OS400J03

Product Type: Fused Disconnect Switch

Amperage Rating: 400A

Voltage Rating: 600V

Use Cases

• Isolate large motor circuits or feeders during routine maintenance without shutting down entire plant power.
• Integrate into switchgear or distribution panels that require safe, immediate disconnection under load.
• Support lockout/tagout procedures for technicians working on energized equipment.

Who It’s For

Facility engineers, electrical contractors, and maintenance teams in manufacturing, processing, facilities management, and commercial settings that demand dependable, code-conscious electrical isolation and quick, safe de-energization.

Tips for Optimal Use

• Pair with the appropriate fuse elements and follow local electrical codes and manufacturer recommendations for replacement and maintenance.
• Regularly inspect connections and linkage to ensure unimpeded operation during trips and manual disconnections.