SENTRON 3VA2116-5HN36-0AF0 — 160 A MCCB with ETU350 Release
The Siemens SENTRON 3VA2116-5HN36-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 160 A at 40 °C through 50 °C. The ETU350 electronic overcurrent release provides adjustable trip settings, making this breaker suitable for feeder and main switchboard applications where selectivity and coordination are required. The 187 kA breaking capacity at 240 V (121 kA at 415 V and 440 V) means it can safely interrupt high-fault currents without cascading upstream — a key spec for high-capacity transformer secondaries or large motor control centers.
Thermal Derating and Application Context
The 160 A rating holds flat from 40 °C to 50 °C, then derates to 154 A at 55 °C, 148 A at 60 °C, 142 A at 65 °C, and 136 A at 70 °C. For a panel with an ambient of 55 °C — common in a non-conditioned electrical room — the breaker is effectively a 154 A device. The maximum operating temperature of 70 °C and storage range of -40 °C to 80 °C cover most industrial environments. The 25.5 W maximum power loss at rated current matters for thermal management inside a sealed enclosure; account for this when sizing ventilation or calculating internal temperature rise.
Auxiliary Contacts and Release Configuration
This variant ships with one auxiliary switch and one trip alarm switch (HQ type) — enough for remote status indication of breaker position and fault tripping. There is no undervoltage release, no shunt trip, no ground-fault monitoring, and no communication function. The overcurrent release is the ETU350, an electronic trip unit with adjustable long-time, short-time, instantaneous, and ground-fault (if enabled) protection curves. The basic switch supplied is the 3VA2116-5HN36-0AA0, which is the core switching mechanism without the electronic trip unit.