Square D QMB325W is a fusible safety switch designed for providing reliable disconnect and overcurrent protection in industrial three-phase power distribution systems. It features a 400A current rating and a 240V AC voltage rating, housed within a robust NEMA 1 enclosure measuring 381 mm in depth and weighing 88 lb for durable panel mounting. The switch is certified to UL and CSA standards and offers a high 200kA AIC rating at 240V for enhanced fault protection. Its typical applications include service entrance, feeder, and branch circuit protection in commercial and industrial facilities where a fusible disconnect is required.
Key Features & Specifications
Type: Fusible Safety Switch, Panel Mount
Voltage Rating: 240V AC
Current Rating: 400A
Configuration: Single, 3-Pole
Phase: 3
AIC Rating: 200kA @ 240V
Fuse Class: R
Wire Size: 3/0 AWG - 600 Kcmil
NEMA Rating: 1
Dimensions: 381 mm Depth
Weight: 88 lb
Standards: UL, CSA Certified
Compatible Frames: ED Frame
Applications: Service Entrance, Feeder, and Branch Circuit Protection