The Siemens SENTRON 3VA2010-5HL32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a line-protection electronic trip unit (ETU320).
The 100 A rating holds flat from 40 °C to 50 °C, then derates to 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. That means in a warm panel — say 55 °C ambient — the breaker can still carry 96 A continuously without nuisance tripping. The ETU320 electronic trip gives adjustable thermal-magnetic curves, so you can fine-tune it for motor start-up or transformer inrush without swapping the breaker. Breaking capacity steps down with voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. Maximum power loss is 13.5 W — negligible for panel thermal budgeting but worth noting if the breaker is enclosed in a small junction box.
No need to stockpile — but if you have a legacy panel running an older 3VA frame, this variant drops into the same footprint and wiring scheme.
Physical integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that fits Siemens 3VA mounting plates and most DIN-rail adapters. The 86 mm depth leaves clearance for rear-connected busbars or cable lugs in a typical 600 mm deep enclosure. The auxiliary contact block (2 NO/NC + 1 alarm) and the shunt trip are pre-installed, so no field assembly is needed. The undervoltage release is absent on this variant — if you need UVR for a machine safety circuit, that is a different order code.