Square D QMB3240J - Fusible Safety Switch 400A@240V (3-Pole NEMA 1)
Square D QMB3240J Panel Mount Switch (Fusible) - Essential Electric Supply
Square D QMB3240J - Fusible Safety Switch 400A@240V (3-Pole NEMA 1)
Square D QMB3240J Panel Mount Switch (Fusible) - Essential Electric Supply

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

Square D
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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