Square D - 400A, 240V, Disconnect Switch

The Square D 400A, 240V Disconnect Switch is a purpose-built solution for safe, reliable electrical isolation in demanding industrial and commercial environments. Designed to support lockout/tagout procedures and deliver a dependable disconnect under load, this switch helps maintain uptime while enhancing safety during maintenance and service work.

Key specifications

• Amperage Rating: 400A
• Voltage Rating: 240V
• Product Type: Disconnect Switch
• Brand: Square D

Why this disconnect switch stands out

• Lockout/Tagout readiness: Built to accommodate standard padlocks and safety tags, helping personnel apply proper LOTO procedures and preventing inadvertent re-energization during maintenance.
• Reliable isolation under load: Provides a secure disconnection even while equipment is energized, reducing risk during servicing and troubleshooting.
• Industrial-grade durability: Engineered for continuous operation in rigorous environments common to manufacturing floors, utilities, and large facilities, delivering long-term performance.
• Clear, decisive control: A straightforward actuation mechanism gives technicians and operators confident control over power paths, improving safety and workflow efficiency.

Ideal use cases

• Service entrances, motor control centers, and main distribution panels in manufacturing plants and processing facilities
• Electrical isolation points for equipment maintenance, troubleshooting, and emergency shutdowns
• Commercial facilities with high-demand loads that require dependable off/on control and safe disconnection under load

Practical guidance and best practices

• Pair this Square D disconnect switch with standard lockout devices and tags to enforce rigorous safety protocols on every maintenance cycle.
• Regularly inspect the switching contacts and enclosure for signs of wear, corrosion, or heat buildup, and ensure the mechanism operates smoothly through routine test procedures.
• Plan installation with compatibility in mind—position the switch to minimize wiring length to feeders and ensure accessible, safe operation for personnel performing LOTO steps.

With the Square D 400A, 240V Disconnect Switch, facilities gain a proven, purpose-driven solution that prioritizes safety, reliability, and efficient maintenance. It’s the practical choice for teams that need robust electrical isolation without compromise.