Siemens 3VA1110-4EF36-0JH0 — 100 A SENTRON MCCB with Shunt Trip
The Siemens 3VA1110-4EF36-0JH0 is a 3-pole molded case circuit breaker from the SENTRON family, designed for line protection. It carries a continuous current rating of 100 A at 40 °C, with minimal thermal derating up to 70 °C (91 A at 70 °C per the datasheet). The interrupting capacity at 240 VAC is 121 kA, dropping to 75.6 kA at 415 VAC and 52.5 kA at 440 VAC — figures that govern its application on high-fault utility or transformer-secondaries. The breaker includes a shunt trip (STL) auxiliary release and provisions for two auxiliary switches plus one trip alarm switch (HQ).
Interrupting Capacity and Application Context
The 121 kA at 240 VAC places this MCCB in the high-interrupting category, suitable for main distribution panels fed by large transformers where available fault current exceeds 100 kA. At 415 VAC the 75.6 kA rating still covers most industrial service-entrance applications. The rated insulation voltage is 800 V, confirming the breaker's suitability for 480/277 V and 600 V systems within its interrupting envelope. No ground-fault monitoring or communication function is integrated — this is a straightforward line-protection device with shunt trip for remote or emergency tripping.
Physical Integration and Mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 3-pole, 100 A frame mounts on a DIN rail or panel-mount base per SENTRON standard practice. The shunt trip (STL) occupies one auxiliary slot; the two auxiliary switches and trip alarm switch (HQ) fill the remaining positions. Verify free-wheeling diode polarity on the shunt trip coil if energizing from a DC supply.
Thermal Performance and Power Loss
Maximum power loss is 25 W at rated current. The breaker maintains full 100 A rating from 40 °C through 50 °C; derating begins at 55 °C (98 A) and reaches 91 A at 70 °C. Operating temperature range is -25 °C to +70 °C, with storage from -40 °C to +80 °C. The trip indicator and voltage trigger are present, confirming visual and electrical trip indication.