ABB SACE T5NQ400TW Circuit Breaker

ABB SACE Tmax T5NQ400TW is a three-pole molded‑case circuit breaker (MCCB) with catalog number T5NQ400TW, rated for 400 A at 600 V AC. It belongs to the Tmax SACE T5NQ family and provides overcurrent protection via a thermal‑magnetic release, suitable for feeders and branch circuits in commercial and industrial power distribution. In fault conditions, it delivers up to 25 kA interrupting capacity at 480 V and up to 36 kA at 415 V, while maintaining 100% rated operation for continuous service. Wiring is via load‑side lug terminals, enabling straightforward installation in panelboards and switchgear assemblies. The T5NQ400TW variant is part of a family of 400 A / 600 V options in the T5NQ line, designed for use in 50/60 Hz electrical environments and common distribution applications such as data centers, manufacturing facilities, and large offices, where reliable protection and rapid fault isolation are required.