The Siemens SENTRON 3VA1110-5EF36-0DF0 is a 4-pole molded case circuit breaker (MCCB) rated for 16 A continuous current (Iu) and a rated insulation voltage (Ui) of 800 V. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V, and 76 kA at 440 V — numbers that matter when you're coordinating with upstream gear in a high-fault panel. The TM240 thermal-magnetic release handles line protection, and the built-in undervoltage release (UVR) lets you drop the breaker on a control signal or safety circuit.
Thermal derating and panel fit
Full 16 A rating holds from 40 °C through 55 °C ambient; at 60 °C it derates to 15 A and stays there through 70 °C. That's a clean thermal curve — no surprise drop at 50 °C. The 130 mm height and 4 in width fit standard SENTRON panel layouts; IP40 on the front means it's protected against solid objects larger than 1 mm, so it's fine in a clean indoor enclosure but not washdown duty.
Auxiliary contacts and release options
Comes with one auxiliary switch plus one trip alarm switch (HQ type), and the integrated undervoltage release is specified as 3VA9608-0BB25. No ground-fault monitoring, no communication module — this is a straight line-protection breaker with a UVR for remote trip. Latching endurance is rated at 15 000 operations.