What this MCCB delivers — and what the ratings mean for your panel
The 3VA1110-4EF32-0AD0: Breaking capacity is the headline number here: 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V. At 690 V it still holds 11.9 kA. That means this breaker can safely interrupt fault currents up to those levels without welding contacts or cascading failure upstream — critical for high-fault panels near large transformers or motor control centers. The 100 A rating holds flat from 40 °C through 50 °C, then derates gradually: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, 91 A at 70 °C. If your panel ambient runs above 50 °C, you need to account for that reduction in continuous current — the breaker won't trip earlier, but its thermal element will see a hotter environment.
Panel fit and integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. That 70 mm depth is the key fit dimension for enclosure depth — it determines whether the breaker clears the door or backplate in a shallow panel. The 76.2 mm width (3 inches) is the standard SENTRON 3-pole footprint; it occupies one 3-inch slot on the DIN-rail mounting plate. The TM240 thermal-magnetic release is fixed — no interchangeable trip unit. The breaker is designed for line protection (not motor or generator protection), meaning its time-current curve is shaped for cable and busbar protection rather than motor overload curves. No undervoltage release, no shunt trip, no communication function on this variant.
Compliance and documentation
The SENTRON 3VA series is designed to meet IEC 60947-2 and UL 489 standards for molded case circuit breakers. Compliance documentation (RoHS, REACH, CE, UKCA, EAC) is provided with the product — the brand supplies a declaration of conformity and material compliance data as standard deliverables with the shipment.