What it is and what it does
The Siemens SENTRON 3VA2110-6KP36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in distribution panels and motor control centers. It carries an ETU850 electronic trip unit with communication capability, so it can report status and trip events over a network — useful for a plant-floor SCADA or a BMS that needs to know which breaker opened without sending someone to look. The interrupting ratings are what make this breaker fit for high-fault locations: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V is the number that matters for most North American 277/480 V panels where the available fault current can push past 200 kA on the secondary of a large transformer. The 3.7 kA at 690 V tells you this is not a 690 V workhorse — it's a 240–500 V breaker. The adjustable current range runs from 150 A minimum to 1 200 A maximum, which is the setting window for the ETU850 trip unit. That means you can dial the long-time pickup anywhere in that band to match the load cable or transformer — you are not stuck at the 100 A frame rating. The continuous rating of 100 A is the frame's thermal limit; the trip unit settings govern the actual protection threshold.
Mounting and panel fit
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint for a 100 A frame — it fits the same DIN-rail or panel-mount cutout as other SENTRON 3VA breakers. The 86 mm depth keeps it clear of the gland plate in a 200 mm deep enclosure, but verify the handle clearance if you are mounting it against a back panel with busbars behind it. Front protection is IP40, so it keeps out tools and fingers but not water. Fine for a dry indoor panel; do not put it in a washdown zone without an enclosure. Power loss is 10 W maximum at rated current. That is low enough to skip forced cooling in a ventilated panel, but if you are packing ten of these in a sealed cabinet, add up the heat and plan for it.
Environmental limits and storage
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage low end is the one to watch if the breaker sits in an unheated warehouse in a northern winter — it will survive -40 °C just fine, but bring it to room temp before applying power to avoid condensation inside the electronics.