What this 3VA2110-5HN36-0JA0 is and what it does
The Siemens 3VA2110-5HN36-0JA0 is a SENTRON molded case circuit breaker (MCCB) built for line protection in distribution panels. It carries a rated continuous current Iu of 100 A across three poles, with an ETU350 electronic overcurrent release handling the trip curve. The integrated shunt trip (STL) auxiliary release lets you remotely open the breaker — useful for emergency-off circuits or interlocking schemes. Breaking capacity runs from 187 kA at 240 V down to 4.25 kA at 690 V, so it handles high-fault service-entrance positions on the low-voltage side.
Breaking capacity across the voltage range
The interrupting rating drops as voltage rises: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. That 4.25 kA figure at 690 V is the weak point — if your panel feeds a 690 V bus with available fault current above that, this breaker won't clear it. For standard 400 V distribution, 121 kA covers most transformer-fed switchboards.
Temperature derating — what the 100 A rating actually means
The 100 A rating holds from 40 °C up to 50 °C. Above that, it derates: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If your panel ambient runs hot — say next to a drive cabinet or in a non-conditioned enclosure — size the breaker for the actual load at the expected temperature, not the nameplate 100 A.
Mounting and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint — it fits most DIN-rail or panel-mount bases without re-drilling. No auxiliary contact version is fitted from the factory, so if you need status feedback to a PLC or indicator light, you'll add a separate auxiliary switch block. The shunt trip (STL) is the only auxiliary release on board; there's no undervoltage release.