Siemens QJ3H175 3 Pole Molded Case Circuit Breaker

Siemens QJ3H175 is a 3-pole molded case circuit breaker (MCCB) in the QJ frame, rated for 175 A with bolt-on mounting for low-voltage distribution panels. It is designed for 240 V AC operation in a three‑phase system, delivering thermal‑magnetic protection with long‑time and instantaneous trip functions to guard against overloads and short circuits in 120/240 V environments. This unit is rated with a short‑circuit current rating up to 22 kA at 240 V and includes load-side lug terminals for straightforward wiring. The QJ frame device represents the ITE Gould lineage, and this specific model is described as a bolt-on frame with a non‑interchangeable trip, suitable for use in Siemens panels and other QJ‑series installations. Typical applications include motor circuits, distribution feeders, and branch-circuit protection in commercial or light industrial settings where reliable protection at 175 A is required.