ABB OT400US03 - 400A, Disconnect Switch

Meet ABB OT400US03 - 400A Disconnect Switch, engineered for industrial and commercial environments where safe electrical isolation is non-negotiable. This high-performance disconnect switch delivers dependable, lockout-ready isolation and maintains reliable performance under load, supporting long-term durability in demanding applications.

Designed to integrate with standard electrical panels and control systems, the OT400US03 supports proper lockout/tagout procedures, giving maintenance teams a clear, auditable path to de-energize equipment before service. With a robust 400A amperage rating, it confidently interrupts power to keep teams safe during routine maintenance, equipment swaps, or emergency shutdowns.

Why this disconnect switch stands out

• 400A continuous current rating: Handles heavy equipment and high-demand circuits with confidence, reducing the need for multiple devices in larger installations.
• Lockout/Tagout readiness: Built to support compliant safety workflows, making it easier to document and enforce safe maintenance procedures.
• Reliable under load: Engineered to achieve a clean, immediate disconnection even when circuits are live, helping minimize arc exposure and downtime.
• Durable industrial construction: Designed for continuous operation in harsh environments, with materials and connections chosen for longevity and minimal maintenance.
• Simple integration: A straightforward form factor that fits common electrical layouts, reducing installation time and field adjustments.

Ideal use cases

• Maintenance shutdowns on heavy machinery and motor loads

• Service disconnects for industrial control panels and distribution boards

• Temporary isolation during equipment upgrades or safety testing

What you gain with the OT400US03

• Enhanced safety through clear, auditable lockout/tagout processes
• Consistent, predictable shutdown behavior that minimizes exposure to live parts
• Reduced downtime with fast, reliable disconnection under load
• Long-term value from a durable, industrial-grade disconnect switch

Specifications

• Amperage Rating: 400A
• Product Type: Disconnect Switch
• Brand: ABB
• Model: OT400US03