This Caterpillar square d QMB saflex unit 400 amp 3 pole 600 AC volts cat. QMB 3640-MJ MAIN is an industrial replacement part manufactured by Caterpillar. It fills a specific mechanical or electrical role within the system it's installed in. Key specifications noted on this listing include 400 Amp, 3 Pole. It is commonly in equipment maintenance, repair, and rebuild work.
