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). It carries a 187 kA interrupting capacity at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds and large motor branch circuits without cascading upstream. The breaker ships with a factory-integrated shunt trip (STL) release and a 2-auxiliary-switch plus 1-trip-alarm contact block (HQ version), which means it can be wired into a safety circuit to trip remotely and report its status back to a PLC or annunciator panel.
Ratings and what they mean for fit
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. On a 480 V system (common in North America) the 79 kA rating covers most transformer-fed services; only very high-fault installations would need a current-limiting fuse ahead of it. Rated insulation voltage is 800 V, so it is suitable for 690 V line-to-line systems (typical in European industrial grids) with adequate clearance. 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.
Lifecycle and sourcing posture
For a BOM freeze or a critical-spare holding, this is a low-risk line item. The breaker is quoted to order against an RFQ; availability and current pricing are confirmed at quote time. 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.