ABB T5N300TWS4 Tmax Molded Case Circuit Breaker

ABB SACE Tmax T5N300TWS4 is a four-pole molded‑case circuit breaker from the Tmax T family, rated 300 A for 600 V AC systems with 50/60 Hz operation. The unit uses a thermal‑magnetic trip with Long‑Time and Instantaneous protection and is UL‑listed, designed for panel mounting with bolt‑on installation and load‑side lug terminals for straightforward wiring. It provides up to 25 kA interrupting capacity at 480 V and up to 36 kA at 415 V, making it suitable for feeder protection in industrial distributions; the 4P, 3‑phase configuration is referenced in catalogs as T5N300TW‑4, while the TWS4 designation identifies the same 300 A, 4‑pole configuration. Typical dimensions are 8.07 in (H) × 5.51 in (W) × 4.07 in (D), reflecting a compact Tmax frame with a non‑interchangeable trip.