Siemens 3VA1110-3FF46-0AA0 — 100 A 4-Pole SENTRON MCCB with TM240 Release
The Siemens 3VA1110-3FF46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated at 100 A continuous current (Iu) at 45 °C and 50 °C, with a 4-pole configuration and 50% N-conductor protection. It carries a TM240 thermal-magnetic release — the '240' indicates the fixed thermal trip threshold at 240 A, while the magnetic short-circuit pickup is adjustable up to 1000 A (li max). Breaking capacity ranges from 75.6 kA at 240 V down to 11.9 kA at 690 V, making it suitable for high-fault industrial distribution panels where fault current varies by voltage level.
Breaking Capacity Across Voltages
At 415 V — the common European low-voltage distribution level — the breaker interrupts 52.5 kA; at 440 V it handles 32 kA, and at 500 V and 690 V it still clears 11.9 kA. These values define the maximum prospective short-circuit current the breaker can safely interrupt at each voltage — critical for coordinating with upstream transformers and downstream loads.
Thermal Derating and Operating Range
The 100 A rating holds at 45 °C and 50 °C; above that it derates linearly to 91 A at 70 °C, with intermediate values at 55 °C (98 A), 60 °C (96 A), and 65 °C (94 A). Ambient operating range is -25 °C to +70 °C, with storage from -40 °C to +80 °C — typical for unconditioned enclosures in industrial environments.
Lifecycle and Sourcing
No official successor has been announced; this is the standard catalog number for a 100 A, 4-pole, TM240 MCCB in the SENTRON 3VA series.
Panel Integration and Dimensions
The breaker measures 70 mm deep, 101.6 mm wide, and 130 mm high — a compact footprint that fits standard 4-pole MCCB mounting positions in distribution boards. Front IP40 protection covers the operator interface; the design accepts optional motor drive and auxiliary accessories for remote operation.