The Allen-Bradley 140U-J2D3-D17 Molded Case Circuit Breaker (MCCB) comes with a size J frame, 3 poles, and 250 Amps of frame current rating. It has 400 to 480 Volts AC of rated operational voltage, 175 Amps of current rating, 50 to 60 Hertz of frequency rating, and 25 Kiloamps of interrupting rating. The protection type for this circuit breaker is adjustable magnetic and fixed thermal protection. Its approximate weight is 11.4 pounds. This circuit breaker is designed to provide overcurrent protection for conductors and equipment. When the current reaches the specified value and duration levels, the 140U-J2D3-D17 Molded Case Circuit Breaker automatically opens to protect the conductor or insulation from dangerous temperature conditions.

The 140U-J2D3-D17 Molded Case Circuit Breaker has fixed magnetic and thermal trip currents. The magnetic trip current of the breaker is generally fixed at 1000% (10x) of the thermal ratings. It accommodates quick, easy, and safe mounting with a wide variety of accessories. It also comes with a range of termination accessories. This three-pole circuit breaker can be used in three-phase applications and DC voltage applications that use special multi-pole configurations. When selecting an MCCB for an application, the device ratings and environmental specifications need to be considered. This 140U-J2D3-D17 circuit breaker can be mounted in panelboards, motor control centers, and switchboards. In order to carry out the maintenance process safely, the circuit breaker provides isolation facilities. Its main units are the arc chamber, contacts, trip mechanism, and tripping unit. This breaker can be used for both high and low breaking capacity requirements in industrial applications. It ensures the energy-efficient and cost-effective operation of the electrical power distribution.