Siemens 3VA1116-4GE46-0AA0 — 160 A SENTRON MCCB for Line Protection
The Siemens SENTRON 3VA1116-4GE46-0AA0 is a 4-pole molded case circuit breaker rated at 160 A continuous, designed for line protection in distribution panels. Its TM220 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip settings, so the breaker is sized for a specific load and does not require field adjustment — a straightforward fit for a BOM line that already specifies 160 A per phase. The interrupting capacity at 415 V is 75.6 kA, which means it can safely clear fault currents up to that level in a 400 V-class system without cascading upstream. At 240 V the rating climbs to 121 kA, and at 690 V it holds at 11.9 kA — the same as at 500 V, reflecting the arc-extinction limit at higher voltages. For a distribution board with a 65 kA SCCR requirement at 415 V, this breaker offers headroom of about 10 kA.
Thermal Derating and Panel Fit
The breaker carries its full 160 A rating up to 50 °C ambient; at 70 °C it derates to 150 A. That means in a crowded, warm enclosure the continuous current capability drops by about 6%, so the panel designer should check the actual ambient temperature at the breaker mounting location — not the overall room temperature — when loading the circuit. Dimensions are 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard 4-pole MCCB footprint that fits Siemens SENTRON mounting plates and busbar systems. Front-face protection is IP40, so it is suitable for general indoor panel use but not washdown environments.