Square D Heavy Duty Safety Switch – H325NR – 3 Pole – 400A – 240V – Series E – NEMA 3R Fusible Disconnect

The Square D heavy duty safety switch (Model H325NR) from Schneider Electric is a rugged industrial-grade fusible disconnect designed for reliable power isolation in demanding indoor and outdoor electrical environments. Built under the Series E platform, this switch delivers enhanced mechanical endurance and long-term operational reliability beyond NEMA KS-1 and UL98 requirements.

The H325NR provides safe, visible circuit isolation and is engineered with a quick-make, quick-break operating mechanism for fast switching performance. It also includes a dual cover interlock system and a color-coded handle indicator to clearly show the switch status, improving operational safety during maintenance and service work.

With a 400A current rating and 3-pole configuration, this switch is suitable for three-phase systems operating at 240VAC and 250VDC. Its fusible design supports multiple fuse classes, allowing flexible coordination with upstream and downstream protection devices. The NEMA 3R enclosure makes it suitable for outdoor installations where protection against rain and environmental exposure is required.

Specifications

• Brand: Square D / Schneider Electric Schneider Electric
• Manufacturer: Schneider Electric
• Product Family: Series E
• Device Type: Heavy Duty Safety Switch / Fusible Disconnect
• Model Number: H325NR
• Configuration: 3 Pole
• Rated Current: 400A
• Voltage Rating: 240VAC / 250VDC
• Short Circuit Current Rating (SCCR): 10kA – 200kA @ 240V
• Fuse Types Supported: H, J, K, L, R
• Enclosure Type: NEMA 3R (Outdoor Rated)

Electrical Performance

• Operational Voltage: 240VAC / 250VDC
• Current Rating: 400A
• High fault current withstand capability up to 200kA
• Fusible protection for coordinated system safety
• Designed for reliable three-phase power isolation

Mechanical & Construction Features

• Quick-make, quick-break operating mechanism
• Dual cover interlock system for enhanced safety
• Color-coded handle indicator for clear ON/OFF status
• Galvannealed steel enclosure for outdoor durability
• Surface-mounted installation
• Factory-installed neutral included
• High mechanical endurance construction
• Heavy-duty industrial switching mechanism

Applications

• Outdoor industrial power distribution systems
• Commercial and industrial electrical panels
• Motor control centers (MCC)
• HVAC systems and rooftop equipment disconnects
• Heavy machinery and equipment isolation
• Maintenance safety disconnect applications

Standards & Certifications

• UL Listed
• CSA Approved
• NEMA 3R compliant enclosure
• Meets high endurance requirements beyond NEMA KS-1 / UL98 standards
• Industrial safety switch compliance standards

Dimensions & Weight

• Dimensions (H × W × D): 10.13 × 27.88 × 50.31 in
• Weight: 192.02 lbs

Environmental Ratings

• Outdoor-rated NEMA 3R enclosure protection
• Designed for harsh environmental exposure (rain, dust resistance)
• High mechanical durability for long service life
• Suitable for industrial and commercial outdoor installations
• Reliable operation in demanding weather conditions