Siemens SENTRON 3VA2110-5KP32-0AJ0 — 100 A MCCB with 187 kA Breaking Capacity
The Siemens SENTRON 3VA2110-5KP32-0AJ0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating required up to that ceiling, which simplifies panel thermal budgeting for a line-protection install. Its interrupting capacity peaks at 187 kA at 240 V AC, drops to 121 kA at 415 V and 440 V, and holds at 75.6 kA at 500 V — high enough for most secondary-distribution fault-current scenarios without needing a current-limiting upstream device. The breaker includes a communication function and ships with 2 auxiliary switches plus 1 trip-alarm switch (HP type), which gives the commissioning engineer a direct dry-contact status back to the PLC or SCADA — no separate add-on module needed for basic position and fault feedback.
Mounting and Panel Integration
At 105 mm wide x 181 mm tall x 86 mm deep, the 3VA2110-5KP32-0AJ0 fits a standard MCCB cutout in a distribution panel or motor control center. The 86 mm depth includes the case body — account for additional finger-safe terminal shrouds and cable bend radius behind the panel door. Maximum power loss is 10 W, so ventilation in a sealed enclosure is manageable; if grouping multiple breakers in a confined row, check the cumulative dissipation against the enclosure's thermal rise calculation.
Key Ratings in Context
Rated insulation voltage is 800 V. The 3-pole design covers three-phase line protection; the built-in communication function supports integration into a monitoring system. The trip indicator is present, and the breaker has no undervoltage release and no ground-fault monitoring version — those functions would require a different order-code suffix or external add-ons.