Line protection MCCB with ETU850 — 100 A frame, 187 kA interrupting capacity
The Siemens SENTRON 3VA2110-5KP32-0BC0 is a 3-pole molded case circuit breaker rated for line protection duty, carrying a continuous current Iu of 100 A and a rated insulation voltage Ui of 800 V. The interrupting capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 79 kA at 500 V, and 4.25 kA at 690 V — that 187 kA figure at 240 V covers high-fault utility feeds or transformer secondaries where fault current is extreme. The ETU850 electronic trip unit gives you adjustable LSI protection curves; no voltage trigger, no phase failure detection, and no ground fault monitoring on this variant — it's a straight line-protection breaker, not a motor-protection or GFCI device.
What the ratings mean for your panel
That 187 kA at 240 V is the headline number — it tells you this breaker can safely interrupt a fault of that magnitude without welding contacts or rupturing the case. At 415 V it still holds 121 kA, which covers most industrial distribution panels. The 100 A continuous rating is flat from 40 °C to 50 °C; above that it derates linearly to 85 A at 70 °C. If your panel ambient runs hot (say 55 °C+), you need to account for that 96.25 A / 92.5 A / 88.75 A / 85 A step-down — don't load it to 100 A in a warm enclosure. The 12.5 W max power loss is the heat the breaker dumps into the panel; factor that into your thermal budget, especially in a sealed cabinet.
Physical fit and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — that's a standard SENTRON 3VA2 frame footprint. It mounts on a DIN rail or can be screw-fixed to a backplate. The 2 auxiliary switches (HQ type) are integrated; the undervoltage release is fitted as standard. Communication function is present on this order code, so it can talk to a higher-level system for remote monitoring or trip-event capture. The basic switch assembly is order code 3VA2110-5KP32-0AA0, and the auxiliary trip module is 3VA9608-0BB11 — useful to know if you're ordering spare parts or sub-assemblies separately.
Environmental and compliance
The breaker operates from -25 °C to 70 °C and can be stored from -40 °C to 80 °C. That covers most indoor industrial environments and unheated warehouses. No trip indicator on this variant — if you need visual trip flag, check a different 3VA2 order code. Compliance documentation (RoHS, REACH, UL, IEC) is standard for the SENTRON series and available on request with the RFQ.