Siemens SENTRON 3VA2110-7MS36-0DH0 — 100 A MCCB, starter protection, 330 kA interrupting
The Siemens SENTRON 3VA2110-7MS36-0DH0 is a 3-pole molded case circuit breaker (MCCB) designed for starter protection in motor branch circuits. It carries a continuous current rating of 100 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which matters when the breaker is packed tightly in a panel with other heat sources. The adjustable overload trip range is 300 A minimum to 1 500 A maximum, so this frame size covers motor FLA from small to mid-range. The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA at 240 V tells you this breaker is built for high-fault-capacity industrial panels — think large transformer secondaries or utility tie points where the available fault current is high. The breaker includes an undervoltage release (UVR) as the auxiliary release, plus 2 auxiliary switches and 1 trip alarm switch (HQ configuration). The trip indicator is present. There is no ground-fault monitoring and no communication function — this is a straightforward thermal-magnetic MCCB with a UVR for safety disconnection on loss of control voltage.
Sourcing and lifecycle
The design is starter protection (not a standard feeder breaker), so it includes thermal memory and a higher magnetic pickup curve suited for motor start-up inrush. The factory-fitted undervoltage release means the breaker drops out on control-voltage loss — a common requirement for emergency-stop and safety circuits.
Physical integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. This is a standard SENTRON 3VA frame size; it mounts on a DIN rail or can be screw-fixed to a backplate. The 86 mm depth keeps it within typical 200 mm enclosure depths. Maximum power loss is 12.5 W at rated current — a useful figure for enclosure thermal calculations when grouping multiple breakers.