The 140U-JD3D3-D20 circuit breaker is a 200 Amps rated circuit breaker in a JD-frame enclosure. The 140U-JD3D3-D20 circuit breaker is a three-pole breaker designed for use as a branch circuit protection or main circuit protection device. The 140U-JD3D3-D20 circuit breaker can be installed inside individual enclosures, inside panelboards, or inside switchboards. The compact size of the breaker enables significant space conservation. The interrupting capacity or breaking capacity for the 140U-JD3D3-D20 circuit breaker range from 30 to 39 kiloamps. The Bulletin 140U family of molded case breakers offers two options for trip units: thermal-magnetic or electronic. The 140U-JD3D3-D20 circuit breaker is a breaker with a fixed thermal–adjustable magnetic trip module. The 140U-JD3D3-D20 circuit breaker is certified by multiple global standards, including the IEC / EN 60947-2, CSA 22.2 No. 5, UL 489, and CE standards.

The Allen-Bradley Bulletin 140U product line offers 15 to 1200 Amps current ratings. Breakers with electronic trip modules can have 70 to 1200 Amps current ratings. Four different variants of the electronic trip module are available, including the LSI (long time / short time / high instantaneous), LSIG (long time / short time / high instantaneous / ground fault), LSG (long time / short time / ground fault), and LS (long time / short time) variants. The long time option allows a long time between 1.05 and 1.3 x the thermal rating. The short time option allows for an adjustable short time between the short circuit and thermal ratings. The ground fault options allows for a configurable time or value of ground trip. The instantaneous trip option allows configurable instantaneous short circuit trip time. Breakers with thermal-magnetic trip units can have 15 to 800 Amps current ratings.