SENTRON 3VA2010-5HN36-0DH0 — 100 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA2010-5HN36-0DH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to the 70 °C operating maximum. The 100 A rating holds flat at 100 A at every 5 °C step from 40 °C through 70 °C, so in a warm panel or next to other heat sources, you keep full ampacity. Breaking capacity runs 187 kA at 240 V AC, drops to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3 kA at 690 V. That 187 kA at 240 V covers high-fault utility feeds and transformer secondaries; the 121 kA at 415 V handles most European industrial distribution. The steep drop to 3 kA at 690 V means this is not the breaker for 690 V motor circuits unless the available fault current is very low.
Built-in Undervoltage Release and Auxiliary Switching
This variant ships with an undervoltage release (UVR) integrated — the UVR trips the breaker when supply voltage drops below a set threshold, protecting downstream loads from a brownout or phase-loss condition. The UVR is factory-fitted as the auxiliary release type, so there is no separate module to wire in. Auxiliary switching comes as 2 auxiliary contacts plus 1 trip alarm switch (HQ configuration). The trip alarm signals a remote PLC or annunciator when the breaker trips on fault, not just on manual open. That is useful for a maintenance team trying to distinguish a nuisance trip from a deliberate disconnect.
Physical Fit and Panel Integration
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard 3-pole MCCB footprint for panel mounting. The 86 mm depth leaves room for rear-connected busbars or a panel door with a rotary handle mechanism. The 105 mm width matches the standard 3-pole cutout in most SENTRON panelboards and distribution boards. Rated power loss is 16 W maximum — a modest heat load for a 100 A breaker, but in a densely packed enclosure with multiple breakers side by side, the cumulative dissipation should be checked against the panel's thermal budget.
Lifecycle and Sourcing
The 3VA2010-5HN36-0DH0 is a line-protection design (not motor-protection), so it is intended for feeder and distribution duty, not for direct motor overload protection. For motor circuits, pair it with a separate overload relay.