Square D MHL3660033DC1426 - 600A, Disconnect Switch

Meet the Square D MHL3660033DC1426 600A Disconnect Switch—a rugged solution engineered for industrial and commercial environments that demand safe, reliable electrical isolation. This model is built to support proper lockout/tagout procedures and to provide dependable disconnection under load, ensuring maintenance can proceed with minimal risk and downtime over the long term.

Why this 600A disconnect switch stands out

• High-current reliability: With a 600A amperage rating, it handles demanding circuits commonly found in larger facilities and equipment rooms.
• Lockout/Tagout readiness: Optimized for safe maintenance workflows, helping teams meet safety requirements and reduce the risk of accidental re-energization.
• Under-load disconnection: Designed to reliably interrupt power on loaded circuits, providing a safer, cleaner shutdown during service or fault conditions.
• Durable, purpose-built design: Built to endure the wear-and-tear of industrial and commercial environments, supporting long-term, dependable performance.
• Trusted brand lineage: Part of the Square D family, delivering consistency and compatibility within established electrical systems.

Who benefits most

• Electrical engineers and facilities managers overseeing large electrical installations
• Maintenance teams performing routine servicing on feeders, panels, and switchgear
• Electrical contractors delivering safe, compliant isolation points for on-site work

Ideal use cases

• Service disconnects in commercial buildings and industrial plants
• Maintenance isolation points for heavy-duty circuits requiring reliable disconnection under load
• LOTO-compliant shutdowns where safe, verifiable isolation is essential before servicing equipment

Product details at a glance

• Amperage rating: 600A
• Product type: Disconnect Switch
• Brand: Square D
• Model: MHL3660033DC1426