What it is and what the key ratings mean
The Siemens 3VA1116-4GD42-0AA0 is a 4-pole SENTRON molded case circuit breaker (MCCB) in the line protection version, carrying a rated uninterrupted current of 160 A at 40 °C through 50 °C, derating to 150 A at 70 °C. That 160 A frame is the continuous current the breaker can carry without tripping under normal conditions — sized for a 160 A feeder or large motor branch circuit. The interrupting ratings climb to 121 kA at 240 V AC and 75.6 kA at 415 V AC, meaning it can safely clear a bolted fault up to those levels without rupturing; at 690 V AC the rating drops to 11.9 kA, so verify available fault current at the installation point. The TM210 overcurrent release provides fixed thermal-magnetic protection — thermal for overload, magnetic for short-circuit — with no electronic adjustments or communication function.
Where it fits and how it mounts
This MCCB measures 101.6 mm wide by 130 mm tall by 70 mm deep — a 4-pole frame that occupies roughly four inches of panel width on a DIN rail or mounting plate. The front face carries IP40 protection, so it's suited for dry indoor enclosures where tools or fingers might contact the front but not for washdown environments. The 100% N-conductor protection means the neutral pole is fully rated and protected, not just switched — important for 4-wire systems where the neutral carries load current. An optional motor drive (product extension available) allows remote charging and closing for automated transfer schemes.
Thermal derating and power loss
The breaker holds its full 160 A rating up to 50 °C ambient; above that it derates linearly to 150 A at 70 °C. Maximum power loss is 38 W, which feeds into enclosure heat calculations — a panel with several such breakers needs ventilation or forced air to stay below the 70 °C operating maximum. Storage range spans -40 °C to 80 °C, and the rated insulation voltage is 800 V AC.