What the ratings mean for fit
The Siemens 3VA1116-5EF36-0HC0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a continuous current of 160 A at 40 °C, derating to 150 A at 70 °C — the thermal curve governs the real-world ampacity in a warm enclosure, so size the upstream bus and downstream load for the 150 A end if the panel runs hot. Breaking capacity hits 187 kA at 240 V AC and 121 kA at 415 V, dropping to 17 kA at 500 V and 690 V. That SCCR headroom at 240 V means it can sit on a high-fault transformer secondary without cascading upstream — useful for retrofit into older plants where available fault current is unknown but likely high. Three-pole construction, 800 V rated insulation voltage, and a shunt trip (STL) auxiliary release built in — the STL lets a remote emergency-stop or PLC-driven signal trip the breaker without a manual handle pull, which simplifies remote disconnect in automated cells.
Panel fit and auxiliaries
Footprint is 130 mm high × 76.2 mm wide × 70 mm deep — standard SENTRON 3VA three-pole width, so it drops into the same DIN-rail or screw-mount position as other 3VA frames without re-drilling the backplate. The 2 auxiliary switches HQ (high-qualified) provide status feedback to a PLC or HMI; no separate aux block needed. Max power loss of 38 W at rated load — minimal heat rejection for a 160 A frame, so adjacent devices in a dense panel stay within their ambient limits without forced cooling.