What the ratings mean for fit
The Siemens SENTRON 3VA2116-5KP32-0BL0 is a 3-pole molded case circuit breaker rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting. Its interrupting capacity hits 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA rating at 240 V means it can handle high-fault scenarios typical of large transformer secondaries or bus-riser feeds without cascading upstream — a key selectivity consideration for the site electrical engineer planning coordination studies. The breaker is designed for line protection, carries a communication function for integration into monitoring schemes, and includes an undervoltage release — a critical feature for applications requiring automatic trip on loss of control voltage, such as safety circuits or emergency-stop chains. The auxiliary switch complement includes 2 auxiliary switches plus a trip alarm and an electrical alarm switch, giving the controls integrator enough dry contacts for status feedback to a PLC or DCS without adding external relay logic.
Integration and mounting
At 105 mm wide, 181 mm tall, and 86 mm deep, the 3VA2116-5KP32-0BL0 fits standard panel-mounting cutouts for SENTRON 3VA frames. The 3-pole form factor matches typical feeder or main breaker positions in distribution panels. The maximum power loss of 28 W should be factored into enclosure thermal calculations, especially in sealed or high-ambient cabinets.