Square D QMB3240J - Fusible Safety Switch 400A@240V (3-Pole NEMA 1)

Square D QMB3240J is a panel-mounted fusible safety switch designed for high-current industrial power distribution protection. This 3-pole switch features a 400A current rating and 240V voltage capacity with a 200kA interrupting rating, housed in a NEMA 1-rated enclosure for indoor use. The rugged 65 lb unit employs J-class fuses within its QMB Saflex frame, compatible with ED-series panels for three-phase systems. UL-listed and meeting industrial safety standards, it provides reliable circuit isolation in manufacturing plants, data centers, and heavy machinery applications.

Key Features & Specifications

• Type: QMB Saflex fusible safety switch, panel mount
• Voltage Rating: 240V AC
• Current Rating: 400A
• Dimensions: Compatible with ED frames
• Standards: UL listed, NEMA 1
• Applications: Industrial power distribution, machinery protection
• Switch Type: Fusible
• Configuration: Single
• Poles: 3
• Phase: 3
• AIC rating: 200kA@240V
• Fuse Class: J
• Weight: 65 lb
• Nema Rating: 1