What it is and what it does
The Siemens SENTRON 3VA2116-8HL32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current, designed for line protection in distribution panels. It uses the ETU320 electronic trip unit, which provides adjustable overload and short-circuit protection curves — a step up from thermal-magnetic trip units for finer coordination selectivity. With an interrupting capacity of 440 kA at 240 V AC and 330 kA at 415 V AC, this breaker handles high-fault-current scenarios typical of large industrial switchboards or transformer secondaries. At 690 V it still interrupts 52.5 kA, so it holds up in 690 V mining or marine installations. Rated insulation voltage is 800 V, and the front face carries IP40 protection — enough for a clean indoor panel, but not for washdown areas. Operating temperature spans -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint for Siemens 3VA frames. The 86 mm depth is the key number for enclosure depth clearance; verify your gland plate and door swing clear that plus wiring space. Maximum power loss is 19.7 W at rated load — factor that into your panel thermal budget if the breaker is in a sealed enclosure with other heat sources.