Part identity and key ratings
The Siemens SENTRON 3VA2116-5KP32-0HH0 is a 3-pole molded case circuit breaker rated for 160 A continuous current, designed for line protection. Breaking capacity follows a steep voltage curve: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V tells you this breaker handles high-fault scenarios common on the secondary side of large step-down transformers — useful for service-entrance or main feeder duty where available fault current is high. Current rating holds flat at 160 A across the full 40 °C to 70 °C ambient range — no derating needed for warm enclosures, which simplifies panel thermal calculations.
Built-in auxiliaries and communication
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type), and a shunt trip release (STL) for remote tripping. The communication function and voltage trigger allow integration into a monitoring or energy-management system — useful for downstream load shedding or fault annunciation without adding external modules. A trip indicator and other measurement function are included, giving local fault indication without opening the panel.
Integration and environment
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — mounts into standard Siemens SENTRON panel footprints. The 3-pole block occupies a single mounting position, with the shunt trip and auxiliary switch wiring brought out to terminals accessible with the breaker in place. Operates from -25 °C to 70 °C ambient, stores from -40 °C to 80 °C. Maximum power loss is 25.5 W at rated load — factor that into enclosure ventilation if the panel is densely packed.