Square D QMB400J 400A 600V Fusible Panelboard Switch
400A | 600V | 3 Pole | Class J | Quick-Make Quick-Break
The Square D QMB400J 400A 600V Fusible Panelboard Switch is a QMJ / Class J Kits series fusible panelboard switch unit rated 400 amps at 600VAC. These quick-make, quick-break switch units mount inside qmb/qmj fusible panelboards to provide branch or main disconnect and overcurrent protection via Class J fuses.
Technical Specifications
Rated 400A at 600VAC, 3-pole, accepts Class J fuses, class j fuse spacing kit (pairs with qmb365mw main switch), up to 200kA interrupting rating with appropriate current-limiting fuses. Interlocked cover prevents opening in the ON position and is padlockable. Fuses and mounting hardware sold separately unless noted.
Applications
Replacement and expansion of installed fusible panelboards and switchboards in industrial plants, commercial buildings, and institutions; legacy panel retrofits where matching switch units are required.
