Square D H365N 400A 3P 600V Safety Switch, NEMA 1, Fusible | AmpState

Square D H365N 400A 3P 600V Safety Switch (NEMA 1, Fusible) from AmpState is a durable equipment disconnect and isolation solution designed for reliable, at-a-glance safety at the point of use. Built to serve maintenance teams, panel builders, and spare inventory programs, this 400 A, 3-pole unit keeps critical systems protected and easy to service in today’s industrial environments.

Key features that matter on the job

• 400 A amperage rating provides a robust disconnect for mid-size to larger loads, reducing downtime during maintenance and service.
• 3 poles tailored for three-phase systems, ensuring proper interruption and coordination across all phases.
• 600 V maximum rating accommodates a wide range of motors, drives, and feeders common in industrial facilities.
• NEMA 1 enclosure optimized for indoor, dry environments, delivering dependable protection in standard shop floors and control rooms.
• Fusible design combines overcurrent protection with a disconnect, enabling precise protection schemes and straightforward fuse replacement when needed.
• Direct part-number match simplifies procurement and reduces downtime when sourcing spares or replacements from AmpState.

Who benefits most

This safety switch is ideal for teams that need a reliable, easily serviceable disconnect for motors, conveyors, pumps, and other 3-phase equipment. It’s also a practical choice for panel builders who specify a ready-to-install, compatible fusible safety switch, and for maintenance inventories where fast access to exact part numbers matters.

Practical use cases

- Isolating equipment for safe maintenance on production lines, HVAC systems, and processing machinery

- Providing a clear, local disconnect point in control panels and switchgear assemblies

- Stocking a ready-to-go spare that aligns with standard Square D specifications and your existing fleet

Why this configuration stands out

Fusible safety switches like the H365N offer a clear balance between protection and operability. The fuse-based protection helps coordinate with downstream devices, while the switch handle delivers a straightforward, human-friendly means to disconnect power for servicing. Choosing a Square D unit also aligns with widely used control architectures and training resources, making it easier for technicians to implement and maintain.

Important considerations and support

Ensure your installation matches the device’s 600 V rating and three-pole configuration, and pair with the appropriate fuse blocks for the expected fault currents. If you’re unsure about fit or compatibility, AmpState can assist in confirming the correct part number match to your panel or system.

Order with confidence: the Square D H365N 400A 3P 600V Safety Switch, NEMA 1, Fusible is the dependable choice for clean, safe, and efficient equipment isolation at the point of use.