Siemens 3VA2010-6HL32-0AC0 — 100 A MCCB with ETU320 Trip Unit
The Siemens SENTRON 3VA2010-6HL32-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a rated insulation voltage of 800 V. It carries a 242 kA breaking capacity at 240 V, dropping to 187 kA at 415 V and 440 V, and 121 kA at 500 V — at 690 V it still holds 4 kA. That kind of short-circuit rating makes it a strong candidate for high-fault installations like transformer secondaries or large motor control centers where upstream coordination demands extreme interrupting capability. The electronic trip unit is an ETU320, a line-protection variant (no ground-fault or voltage-trip function). It ships with 2 HQ auxiliary switches for status feedback to a PLC or SCADA. The front face carries an IP40 rating — fine for a clean panel environment, but not for washdown zones.
Thermal Derating and Panel Fit
Current rating holds flat at 100 A from 40 °C up to 50 °C; above that it derates linearly to 85 A at 70 °C. If the breaker sits in a hot enclosure — say, near a drive or transformer — the 65 °C figure (88.75 A) is the one to size against. Maximum power loss is 13.5 W, which is manageable for a standard steel enclosure with passive ventilation. Dimensions are 105 mm wide × 181 mm high × 86 mm deep. That depth (86 mm) is shallow enough to fit most 200 mm deep enclosures without a gland-plate conflict. The 105 mm width is the standard 3-pole MCCB footprint for the SENTRON 3VA platform — it clips onto the mounting plate or DIN rail adapter without extra adaptors.