Square D H363N - 100A, 600V, 3-Pole, Fused Disconnect Switch

Square D H363N is a 100A, 600V, 3-Pole Fused Disconnect Switch engineered for reliable electrical isolation in demanding industrial and commercial environments. This switch delivers dependable disconnection under load while supporting robust lockout/tagout procedures, helping maintenance teams work safely and efficiently with long-term durability.

Key specifications

• Amperage rating: 100A
• Voltage rating: 600V
• Number of poles: 3-Pole
• Product type: Fused Disconnect Switch
• Brand: Square D
• Model: H363N

What makes this disconnect switch essential

• Integrated fusing provides overcurrent protection close to the source, reducing the potential for damage and improving safety during maintenance.
• Three-pole design ensures true isolation of all phases in a three-phase system, simplifying compliance with electrical safety standards.
• Designed to support lockout/tagout (LOTO) procedures, enabling technicians to secure circuits during service without risk of unexpected energization.
• Rugged construction built for repeated operation in busy electrical rooms, control panels, and service entrances, delivering dependable performance over time.
• Seamless integration with existing Square D or compatible electrical infrastructure, enabling straightforward installation and serviceability.

Who benefits most

• Facilities engineers and maintenance teams managing three-phase power distribution
• Industrial manufacturers needing reliable isolation for equipment servicing and line downtime
• Commercial facilities with high-current motors or machines that require safe, immediate disconnection under load

Practical considerations and best practices

• Verify system matches the 100A, 600V ratings before installation to ensure safe operation.
• Pair with appropriate lockout/tagout devices and procedures to maximize maintenance safety.
• Schedule periodic inspections of fuses and switch operation to maintain consistent reliability and performance.