MCCB with ETU550 — what the ratings mean for your panel
The Siemens 3VA2216-5JP32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The ETU550 electronic trip unit gives you adjustable overload and short-circuit protection with a rated insulation voltage of 800 V, so it handles 480 V and 600 V class systems comfortably. The interrupting capacity hits 187 kA at 240 V and still holds 121 kA at 415 V; at 690 V it drops to 4.5 kA, so watch the voltage on high-impedance fault paths. The 3VA2216-5JP32-0AA0 includes a communication function, meaning it can talk to your control system for metering and status — useful for condition monitoring without adding a separate power meter. The front face carries IP40 protection, fine for a clean indoor panel; keep it behind the enclosure door for washdown areas.
Panel fit and integration
The 3VA2216-5JP32-0AA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and distribution blocks. The 19.7 W maximum power loss at rated load matters for thermal management inside a sealed enclosure; factor it into your heat-rise calculation if the panel is densely packed.
Trip unit and protection range
The ETU550 is an electronic trip unit with a 240 A minimum to 1 920 A maximum continuous current adjustment band — that is a 8:1 range, giving you flexibility to re-rate the breaker for different loads without swapping hardware. The line protection design (no ground-fault monitoring version) means it is intended for feeder and main breaker duty, not equipment ground-fault protection.