What this MCCB delivers for the panel
The Siemens SENTRON 3VA2116-5HN36-0DA0 is a 3-pole molded case circuit breaker rated for 160 A continuous current at 40 °C, with an electronic trip unit ETU350. Its interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V AC — figures that give real selectivity headroom in a main or feeder position. The 86 mm depth and 105 mm width fit standard SENTRON panel footprints, and the 28 W maximum power loss is manageable for enclosed distribution boards without forced cooling.
Breaking capacity and thermal derating — the numbers that matter
At 240 V the 187 kA rating covers high-fault utility feeds. At 415 V it still delivers 121 kA, dropping to 79 kA at 500 V and 4.25 kA at 690 V — the last figure is the one to check if this breaker lands in a 690 V line-up. The ETU350 electronic trip allows adjustable overload and short-time settings, which helps coordinate with downstream breakers. Thermal derating is flat at 160 A from 40 °C through 50 °C; above that it steps down to 154 A at 55 °C, 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. If the panel ambient runs above 50 °C, the continuous current must be reduced accordingly.
Built-in undervoltage release — no auxiliary contact, no comms
This variant ships with an undervoltage release (UVR) as the integrated auxiliary trip, designated part 3VA9608-0BB25. There is no auxiliary contact block and no communication function — it is a straightforward line-protection breaker with UVR for applications that require automatic opening on voltage loss. The trip indicator is absent, so a remote status check needs an add-on auxiliary switch. Phase failure detection is also not built in; the ETU350 trip unit handles overcurrent and short-circuit only.