ALLEN BRADLEY 140M-JD8P-D20-W (A) MOTOR CIRCUIT PROTECTOR

ALLEN BRADLEY 140M-JD8P-D20-W (A) is a 3-pole molded case motor circuit protector from Rockwell Allen‑Bradley 140M series, rated 250A, 600V AC / 250V DC, magnetic trip only for motor short-circuit protection. This motor protector provides instant short-circuit cut-off protection for heavy-duty three-phase motors in industrial machinery, compressors and marine power control cabinets. The motor safety control system relies on this unit to isolate power loops immediately when severe short-circuit faults occur, safeguarding drive motors and upstream power distribution equipment. The 140M-JD8P-D20-W (A) model adopts robust molded housing, front operating handle and visual trip indicator. This Allen‑Bradley protector is widely used for factory workshop, power plant and marine switchboard maintenance and spare replacement.

The motor protector is designed for branch circuit short-circuit protection, paired with thermal overload relays for complete motor overload+short-circuit protection solution. The motor safety control cabinet transmits power to the motor load through the 140M-JD8P-D20-W (A) main contact terminals. This motor protector supports DIN rail or panel mounting layout and integrates mechanical interlock function for cabinet door safety lock. The motor safety control system restores full motor power feed and short-circuit protection capability after installing this motor circuit protector.

The motor protector of 140M-JD8P-D20-W (A) complies with IEC 60947 and UL 508 low voltage standards. The motor safety control spare has high breaking capacity for heavy industrial power loops. This motor protector can be fitted with auxiliary contact blocks for remote fault alarm signal output to PLC and annunciator systems. The 140M-JD8P-D20-W (A) motor safety control component is a critical spare for industrial motor control cabinet overhaul.