Siemens NGB3B090B N 90A 480V 3P Three-Phase Contactor

Siemens NGB3B090B is a 3-pole molded-case circuit breaker (MCCB) rated for 90 A, designed for bolt-on panelboard mounting in 480Y/277 V three-phase systems. The NGB family provides thermal-magnetic protection with distinct long-time and instantaneous trip elements, and this model includes load-side lug terminals for straightforward wiring in distribution panels. In terms of performance, it carries an interrupting rating of 25 kAIC at 480Y/277 V and 14 kAIC at 600Y/347 V, making it suitable for mid-size feeders and motor-start circuits in commercial and industrial environments. The bolt-on, 3-pole design offers compact, rugged protection for feeders up to 90 A in Siemens ITE panelboard installations where reliable overcurrent protection is required.