Industrial Automation Co. is NOT an Authorized Rockwell Distributor - we have our own unique inventory and sourcing relationships. Review our Reseller notice, here.

The Allen-Bradley 140G-KTH3-D40 trip unit is an advanced electronic trip unit from the 140G frame K circuit breaker series, providing robust short-circuit, thermal, and overload protection with true RMS current sensing capabilities. Designed for industrial 3-phase applications, it offers a continuous current rating of 400 Amps and operates at a maximum voltage of 600 Volts AC. This adaptable unit features a customizable protection curve, a 3-pole wiring design, and supports end-cap line and load terminals for straightforward installation. With features such as long-time delay overcurrent and instantaneous trip short-circuit protection, its advanced functionalities include settings for thermal trip behavior and magnetic short-circuit adjustments from 240 to 4000 Amps. Certified to international standards including UL, CCC, CE, and CSA, it is suitable for temperatures between -25 to 70 degrees Celsius and mounts easily on a DIN rail with dimensions of 140 x 108.5 x 205 millimeters.