What this 3VA2 frame 160 MCCB carries
The Siemens 3VA2116-5KP32-0DL0 is a 3-pole IEC molded-case circuit breaker in the 3VA2 series, frame 160, with a breaking capacity class M rated at 55 kA at 415 V AC. That puts it in the medium-high interrupting range for this frame size — enough for most secondary distribution and large motor branch circuits where the available fault current sits in the 40–55 kA range. The ETU850 electronic trip unit gives you LSI protection (long-time, short-time, instantaneous) with adjustable Ir from 63 A to 160 A, Isd from 0.6 to 10 times In, and Ii from 1.5 to 10 times In. That means you can coordinate it downstream of a larger main breaker and still get selective tripping on a bolted fault. The part also ships with an undervoltage release (UVR) rated 208–230 V AC 50/60 Hz, two HQ auxiliary switches, one HQ trip alarm switch, and one electrical alarm switch. The nut keeper kit is included. N-conductor protection is optional via an external current transformer — not on board, but provisioned for if your distribution panel requires it.
What the ratings mean for the panel
The 55 kA Icu at 415 V is the maximum short-circuit current the breaker can interrupt once without needing replacement. In an IEC installation, that's the rating you compare to the prospective fault current at the point of installation. Class M is Siemens' designation for this interrupting level on the 3VA2 platform — it sits above standard (S) and below high-performance (H) in the same frame. The ETU850 is a microprocessor-based trip unit with a wide adjustment range, so you can dial in the protection curve to match cable and load without swapping the breaker body. The UVR (208–230 V AC) drops the breaker on loss of control voltage — standard for emergency-stop circuits or undervoltage protection on motor feeders. The auxiliary and alarm switches (two HQ aux, one HQ trip alarm, one electrical alarm) give the PLC or BMS full status feedback: breaker on/off, trip condition, and a separate alarm contact for the maintenance panel.