The Siemens SENTRON 3VA2116-5KQ36-0AA0 is a 3-pole molded case circuit breaker rated for 160 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries an ETU860 electronic overcurrent release, which gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The interrupting ratings are the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V means it can ride through a massive fault without rupturing — useful on high-capacity transformer secondaries or large busway feeds where available fault current is high.
Dimensions and panel fit
The case measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this frame size — it drops into the same panel cutout as other 3VA2-frame breakers. Depth of 86 mm means it clears most standard gland plates and backpan covers without a spacer. The front face carries an IP40 rating, so it's protected against tools and small wires but not against hose-down; keep it inside a closed enclosure.
Protection and release features
This is a line-protection breaker — no undervoltage release fitted, no voltage-trip module. It does include a communication function and a ground-fault monitoring version configured for summation current formation on the L-conductor. The ETU860 release supports adjustable settings for LSIG (long-time, short-time, instantaneous, ground) protection. Rated insulation voltage is 800 V, so it's suitable for 480/277 V and 600 V systems with headroom. Maximum power loss is 25.5 W — that's the heat you need to vent inside the enclosure at full load.
Environmental range
Operating temperature spans -25 °C to 70 °C, storage from -40 °C to 80 °C. That covers most indoor industrial environments, including unheated warehouses in cold climates. The 160 A rating holds flat across the entire operating range — no derating curve to track.