Allen-Bradley 140U-J6 MCCB Frame

Feature & Principle

It is the J frame base of Rockwell Allen-Bradley 140U series current-limiting molded case circuit breaker. It can be assembled with matched trip modules to form a complete circuit breaker. It adopts thermal-magnetic trip principle: thermal part responds to overload, magnetic part responds to short circuit. It supports manual switching and fault trip, widely used in motor control centers and low voltage distribution cabinets.

Specifications

Model: 140U-J6 Brand: Allen-Bradley (Rockwell Automation) Series: Bulletin 140U Frame type: J Frame Max rated voltage: 600VAC Standard: UL489, IEC60947-2 Lifecycle: Discontinued legacy spare Application: Motor protection, industrial branch circuit protection cabinet Certification: CE, UL

Components & Diagnostics

Insulated breaker housing, contact assembly, trip unit mounting cavity, operating handle, terminal base. Common faults: contact burnout, handle jamming, trip function failure, terminal overheating.

Product Brief

140U-J6 circuit breaker frame, Allen-Bradley 140U series low voltage protection spare widely used for old motor control cabinet overhaul and replacement.