SENTRON 3VA1110-4EF32-0AA0 — 100 A MCCB, Line Protection
The Siemens SENTRON 3VA1110-4EF32-0AA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, carrying a 100 A rating at 40 °C and a TM240 thermal-magnetic release. Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V, giving solid SCCR headroom for most industrial distribution panels. The front face is IP40 rated — fine for enclosed panel mounting, not for washdown environments.
Current Rating and Thermal Derating
Rated 100 A continuously at 40 °C, the breaker holds that same 100 A at 45 °C and 50 °C. Above that, it derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If your panel ambient runs hot, that 91 A ceiling at 70 °C is the number to size against — not the 100 A label.
Interrupting Capacity Across Voltages
Interrupting capacity varies by system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 400 V-class panel, the 75.6 kA figure at 415 V is the one that governs selectivity coordination studies. The 11.9 kA at 690 V means this breaker is usable on 690 V systems only where the available fault current stays under that threshold.
Physical Fit and Panel Integration
Dimensions are 76.2 mm wide, 130 mm tall, and 70 mm deep. The 70 mm depth is shallow enough for standard 200 mm deep enclosures without crowding the door. Three-pole construction with no undervoltage release or communication module — it is a straight line-protection MCCB, no auxiliary gimmicks.