What this MCCB delivers
The Siemens SENTRON 3VA1110-5EF36-0HC0 is a 3-pole molded case circuit breaker rated for 100 A at 40 °C, designed for line protection in distribution panels. Its interrupting capacity hits 187 kA at 240 V AC and 121 kA at 415 V AC, so it handles high-fault scenarios without cascading upstream — critical for main or tie-breaker positions where SCCR headroom matters. Includes a shunt trip (STL) and two HQ auxiliary switches. Rated insulation voltage is 800 V.
Thermal performance and derating
This MCCB holds its full 100 A rating up to 50 °C ambient. Above that, it derates smoothly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If your panel runs hot — say, near a drive cabinet or in a non-climate-controlled enclosure — the 70 °C figure tells you the breaker still delivers 91 A continuous without nuisance tripping. Maximum power loss is 25 W, which factors into enclosure heat calculations. Operating range spans -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Interrupting capacity across voltages
Breaking capacity drops as voltage rises: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. For a 480 V delta service (common in North American industrial), the 75.6 kA at 440 V is the closest reference — ample for most transformer-fed main breakers. At 690 V, the 17 kA still covers many motor control center fault levels.
Panel fit and auxiliary options
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard SENTRON 3VA form factor that drops into existing 3VA panel cutouts. The 76.2 mm width (3 inches) is the same as the 3VA1110-5EF32-0AM0 variant, so a panel designed around that sibling accepts this breaker without re-drilling or busbar repositioning. The two HQ auxiliary switches provide high-reliability contact feedback for PLC or SCADA status monitoring. The shunt trip (STL) allows remote or emergency-off tripping via a control voltage signal — no undervoltage release on this variant, so don't expect automatic dropout on power loss.