What it is and what it does
This is a Siemens SENTRON 3VA1010-4ED36-0BA0 molded case circuit breaker (MCCB) — a 3-pole, 100 A line-protection device built for distribution panels and motor control centers. It carries a TM210 thermal-magnetic trip unit, so the thermal element handles overloads and the magnetic element clears short circuits. The built-in undervoltage release (UVR) means the breaker trips if the control voltage drops below a set threshold — useful for safety circuits or remote shunt-trip applications.
SCCR and thermal derating — what the numbers mean for your panel
Short-circuit current ratings (SCCR) are given per voltage level: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V is high enough for most industrial service-entrance or sub-feed applications. The 11.9 kA at 690 V is the limiting case — if your system runs at 690 V, verify the available fault current doesn't exceed that. Rated current is 100 A from 40 °C through 50 °C, then derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If your panel ambient runs hot — say inside a non-ventilated enclosure near other heat sources — size your load to the derated value, not the 100 A nameplate. The rated insulation voltage is 800 V, so it's fine for 690 V systems with margin.
What's in the box — dimensions and mounting
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep. That 70 mm depth matters for shallow enclosures — it's compact enough for most panel layouts. The 76.2 mm width is a standard 3-pole MCCB footprint, so it fits existing busbar and mounting arrangements in SENTRON and compatible panels. Power loss at full load is 27.5 W — account for that in your enclosure thermal calculation.