What this MCCB is and what it does
The Siemens SENTRON 3VA2110-5HN36-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in distribution panels. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so it handles high-fault scenarios on the low-voltage side while still clearing moderate faults at higher voltages. Rated insulation voltage is 800 V, meaning it's built for 690 VAC systems with margin. The breaker carries two HQ auxiliary switches (form C) for status feedback to a PLC or annunciator panel.
Sizing and thermal performance
The 100 A rating holds flat from 40 °C all the way to 70 °C ambient — no derating needed in a warm enclosure, which is unusual for an MCCB this size. Maximum power loss is 10 W, so it won't cook neighboring components in a dense panel.
Physical fit and panel integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — standard MCCB footprint for a 100 A frame, mounts on a DIN rail or direct panel. No undervoltage release, no ground-fault monitoring, no communication module on this variant — it's a straight thermal-magnetic line-protection breaker with aux contacts.