Square D H364N - 200A, 600V, 3-Pole, Fusible, Safety Switch

Meet the Square D H364N — a rugged fusible safety switch engineered for dependable isolation and overcurrent protection in demanding industrial and commercial environments. With a 200 A rating and 600 V maximum, this three-pole disconnect delivers controlled power, precise protection, and a compact footprint that fits tight electrical rooms and panel layouts.

Key specifications

• Model: H364N
• Amperage: 200A
• Voltage: 600V
• Poles: 3-Pole
• Fusing: Fusible

Why this fusible safety switch matters

The H364N combines safe, visible isolation with reliable overcurrent protection, making it ideal for motor disconnects, panelboards, and branch circuit protection. Its fusible design provides intentional, fast-acting protection that helps prevent equipment damage and electrical hazards when faults occur—without sacrificing quick, accessible service when fuses need replacement or inspection.

Where it shines

• Motor disconnects: Quickly isolate three-phase motors for maintenance or protection against overloads.
• Panelboards: Serves as a robust protection point within distribution panels.
• Branch circuit protection: Adds a reliable safeguard for critical circuits in busy facilities.

Practical benefits you’ll notice

Compact design minimizes space requirements in electrical rooms or switchgear enclosures, while a maintainable configuration simplifies periodic checks and fuse management. The three-pole arrangement ensures reliable three-phase control, with clear, intentional isolation during service work. This means less downtime, clearer fault protection, and a safer work environment for electricians and operators alike.

Tips for selecting and using

Choose the H364N when you need a dedicated, fused disconnect that sits neatly between your power source and motor or panelboard circuits. Ensure compatible fuse types and ratings align with your load in real-world operating conditions, and follow local electrical codes for installation and maintenance. For industrial and commercial applications where dependable, straightforward protection is essential, this Square D safety switch provides a practical, long-lasting solution.