SENTRON 3VA1116-4EF46-0AA0 — 160 A 4-Pole MCCB with TM240 Release
The Siemens SENTRON 3VA1116-4EF46-0AA0 is a 4-pole molded case circuit breaker rated for line protection, carrying a TM240 thermal-magnetic overcurrent release and a continuous current of 160 A at 40 °C. Breaking capacity reaches 121 kA at 240 V AC and remains substantial at higher voltages: 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — covering most industrial distribution levels without an upstream current-limiting fuse. The TM240 release is a fixed thermal-magnetic trip unit sized for 160 A frames; there is no undervoltage release, no ground-fault monitoring, and no communication function on this variant — it is a straight line-protection breaker for conventional panel feed.
Current Rating vs. Ambient Temperature
The 160 A rating holds flat from 40 °C through 50 °C, then derates gradually: 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. In a sealed enclosure or high-ambient panel, use the 70 °C figure (150 A) for sizing — the breaker does not trip early, but the thermal element tracks the actual ambient.
Physical Fit and Panel Integration
Dimensions are 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard 4-pole MCCB footprint that mounts on a DIN rail or directly to a backplate via the screw terminals. Front IP40 protection means it is suited for enclosed distribution boards where incidental tool or finger contact is the only exposure. Power loss is 38 W maximum at rated load — account for that heat in the enclosure thermal calculation, especially when grouping multiple breakers in a single cabinet.