Siemens 5SJ4110-7HG40 is a one-pole SENTRON miniature circuit breaker designed for single‑phase protection of 240 V AC circuits, rated 10 A with a 14 kA interrupting capacity at 240 V per UL 489. It uses a thermal‑magnetic trip mechanism with a C‑curve (type C) characteristic and a depth of 70 mm (D = 70 mm), featuring a same-polarity design compatible with standard 5SJ4 enclosures and panelboards. Siemens also lists a 277 V variant of this family, 5SJ4110-7HG42, with a 10 A rating and 10 kA interrupting capacity at 277 V; by contrast, the 7HG40 model provides 14 kA at 240 V.
