Square D H323NRB - 100A, 240V, 3-Pole, Fused Disconnect Switch

The Square D H323NRB is a rugged 100A, 240V, 3-Pole Fused Disconnect Switch engineered for dependable electrical isolation in demanding industrial and commercial settings. Built to support proper lockout/tagout procedures, it delivers confident disconnection under load and stands up to long-term use in harsh environments.

Key benefits that matter in real-world, day-to-day use

• Three-pole design for full circuit isolation: Ensures all conductors are safely disconnected, providing comprehensive protection for motors, feeders, and control circuits.
• Fused protection: Integrated fuses offer dependable overcurrent protection, helping prevent equipment damage and reducing downtime caused by electrical faults.
• Outdoor-ready enclosure (NEMA 3R): Durable, weather-resistant enclosure suitable for outdoor or damp locations, delivering reliable performance in varying climate conditions.
• Lockout/Tagout compatible: Designed to support safe maintenance practices, making it easier to comply with safety protocols and ensure personnel safety during servicing.
• Reliable disconnection under load: Engineered for dependable operation even when circuits are energized, contributing to safer servicing and faster fault resolution.
• Industrial-grade durability: Built to withstand demanding environments, reducing maintenance frequency and extending service life.

Ideal applications

Perfect for service disconnects, motor control circuits, and equipment feeders in warehouses, manufacturing floors, and commercial facilities. When you need a dedicated, robust point of isolation for a 100A, 240V system, the Square D H323NRB delivers straightforward integration with existing electrical layouts while meeting safety and reliability needs.

Technical specifications at a glance

• Brand: Square D
• Model: H323NRB
• Product Type: Fused Disconnect Switch
• Amperage Rating: 100A
• Voltage Rating: 240V
• Number of Poles: 3-Pole
• Enclosure Rating: NEMA 3R

Practical installation and use tips

• Plan for a dedicated disconnect point near equipment or at the point of service entry to simplify lockout/tagout procedures during maintenance.
• Verify wiring and conductor sizing align with a 100A, 240V three-pole configuration to ensure optimal performance and safety.
• Utilize the NEMA 3R enclosure’s outdoor-capable design where weather exposure or damp conditions are present to maintain reliability over time.
• Maintain clear labeling on the disconnect switch to maximize safety and compliance with workplace procedures.

The Square D H323NRB stands out by combining a robust fused disconnect with a weather-rated enclosure, purpose-built for safe, durable isolation in real-world industrial and commercial environments. Its emphasis on safe disconnection under load, lockout/tagout compatibility, and long-term reliability makes it a practical, concrete choice for professionals who prioritize safety, compliance, and uptime.