Square D QSF4033C - Fusible Safety Switch 400A (3-Pole 240V RK1/RK5)

Square D QSF4033C is a fusible safety switch designed for industrial power distribution systems requiring 400A circuit protection. The panel-mounted unit operates at 240V AC with a 3-phase configuration, featuring a rugged single-pole design rated for RK1/RK5 fuse classes. Its 200 lb steel enclosure houses heavy-duty contacts compatible with HHED frames, meeting industry standards for high-current applications. Typical installations include motor control centers, manufacturing equipment, and commercial electrical service entrances.

Key Features & Specifications

• Type: Fusible safety switch with panel mount configuration
• Voltage Rating: 240V AC
• Current Rating: 400A
• Dimensions: Compatible with HHED frames
• Standards: Industrial-grade protection
• Applications: Motor control centers, power distribution
• Switch Type: Fusible
• Configuration: Single
• Phase: 3
• Poles: 3
• Fuse Class: RK1, RK5
• Weight: 200 lb
• Item Subcategory: Panel Mount