Square D LAF3640022M1212,400A 3P Circuit Protector

The Square D Mag-Gard LAL3640022M motor circuit protector is a 600 V AC, 400 A, 3‑pole unit‑mount device engineered to protect large motors with a thermal‑magnetic trip and an instantaneous trip function. Rated for 600 VAC operation, its 3‑pole design delivers robust interrupt capability up to 22 kAIC, supporting reliable short‑circuit protection in industrial motor circuits. The compact unit‑mount enclosure measures approximately 11 in high by 6 in wide and 5.84 in deep, and accepts substantial conductor terminations: line terminals accommodate up to 600 kcmil aluminum or copper, while load terminals accept up to 250 kcmil. It is UL Listed and CSA and IEC certified, and is manufactured in Mexico as part of Square D’s Mag‑Gard line. Typical applications include motor protection in MCCs, switchgear, and motor control centers, where 400 A, 3‑phase loads such as pumps, fans, compressors, or conveyors require reliable thermal‑magnetic protection with fast instantaneous tripping.