What this 3VA1110-5EF32-0DA0 brings to a panel
The Siemens 3VA1110-5EF32-0DA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C — the same rating holds through 50 °C, then derates to 90 A at 70 °C. Its breaking capacity hits 187 kA at 240 V and 121 kA at 415 V, which means it can safely interrupt high-fault currents in a distribution panel without upstream coordination issues. The TM240 thermal-magnetic release handles overload and short-circuit protection for line protection duty. An undervoltage release (UVR) is built in, so the breaker can be tripped remotely on loss of control voltage — useful for emergency-stop circuits or undervoltage protection schemes.
Sizing and thermal derating for cold-chain or warm environments
The 100 A rating is flat from 40 °C to 50 °C — no derating needed in most control-room or enclosed-panel conditions. At 55 °C it drops to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. For a cold-storage freezer panel operating near -25 °C (the minimum operating temperature), the breaker runs cold and stays cold — no thermal trip nuisance from ambient cold. The storage range of -40 °C to 80 °C covers warehouse and transport extremes. IP40 on the front means it's protected against tools and small wires but not washdown; keep it inside a sealed enclosure if the panel sees hose spray.
Physical fit and integration
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep. The 76.2 mm width is a standard 3-pole MCCB footprint — it drops into a panel cutout or DIN-rail adapter designed for SENTRON 3VA frames. The 70 mm depth leaves clearance for rear busbar connections in a typical 200 mm deep enclosure. No communication module, no phase-failure detection, no ground-fault monitoring on this variant — it's a straight line-protection breaker with undervoltage release.