It carries a rated current of 20 A with full thermal capacity maintained from 40 °C through 55 °C, derating to 19 A at 60 °C and above — relevant for panels running warm in non-climate-controlled enclosures. Breaking capacity is the headline selector here: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 75.6 kA figure at 240 V covers high-fault service-entrance applications on 208Y/120 V or 240 V delta systems; the 52.5 kA at 415 V handles most European 400 V distribution without upstream fusing.
Auxiliary and release configuration
No undervoltage release is fitted, and there is no ground-fault monitoring module on this variant. A voltage trigger and trip indicator are present on the breaker face — the trip indicator gives a visual flag that the breaker opened on a fault rather than manually, which speeds fault-finding on a line-down call.
The 76.2 mm width (3 in) is the standard 3-pole MCCB footprint for the SENTRON 3VA1 frame; it mounts on a DIN rail or directly to a mounting plate via the base slots. Maximum power loss is 12 W, so no special ventilation is required in a standard IP3X or IP4X enclosure.