Siemens MK0402L1400RLM - 400A, 240V, Disconnect Switch

When safety and reliability are non-negotiable for large electrical circuits, the Siemens MK0402L1400RLM 400A, 240V disconnect switch stands up to the challenge. This robust disconnect switch is designed for industrial and commercial environments where safe isolation matters most, enabling proper lockout/tagout procedures and dependable disconnection under load. Built by Siemens, a trusted name in electrical protection and switchgear, it delivers long-term durability under demanding operating conditions.

Key capabilities

• High-current capability: 400A rating at 240V for controlling major motors, feeders, and power circuits.
• Safe isolation under load: engineered to interrupt and isolate circuits without compromising operator safety during maintenance or emergencies.
• Lockout/Tagout readiness: supports standard lockout/tagout practices to keep equipment safely de-energized during service.
• Durable construction for long life: built to withstand frequent operation in busy industrial environments.

Ideal use cases

• Service disconnects for large motors, pumps, conveyors, and HVAC systems in manufacturing plants and commercial facilities.
• Maintenance windows where mechanical isolation is required before any work begins.
• Emergency shutdowns and routine energy control in electrical rooms and switchgear areas.

Specifications

• Amperage Rating: 400A
• Voltage Rating: 240V
• Product Type: Disconnect Switch
• Brand: Siemens
• Model: MK0402L1400RLM

Practical guidance to maximize safety and performance

• Pair this switch with a compliant lockout/tagout protocol to ensure isolation during maintenance and servicing.
• Schedule periodic functional checks to confirm reliable disconnection under load, reducing unexpected downtime.
• Coordinate with your electrical protection scheme to ensure seamless integration with upstream and downstream protection devices.