What the ratings mean for your panel
The Siemens 3VA2216-7KP32-0AA0 is a SENTRON molded case circuit breaker rated for 160 A continuous current with a 3-pole design. Its interrupting capacity hits 330 kA at 240 V and still holds 242 kA at 415 V or 440 V — that's the kind of fault-clearing muscle you need for high-available-current transformer secondaries or large motor control centers where a weak breaker would cascade upstream. The ETU850 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, plus a communication function for remote monitoring or selective coordination studies.
Sizing and thermal derating
The breaker is rated for 160 A across the full ambient range from 40 °C through 70 °C — no derating needed for elevated panel temperatures. That simplifies panel layout: you don't have to oversize the frame or add forced ventilation just because the breaker sits next to other heat sources. The maximum power loss is 19.7 W, so heat dissipation is manageable even in a sealed enclosure.
Physical fit and mounting
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. The 105 mm width is standard for a 3-pole MCCB frame — it fits the usual DIN-rail or backplate footprint without surprises. IP40 on the front means it's protected against tools and wires larger than 1 mm, which is typical for enclosed panel mounting; no washdown rating, so keep it inside the cabinet.