The Siemens 3VA1116-1AA42-0KA0 is a SENTRON switch disconnector in a molded-case switch (MCCB) form factor — it provides visible isolation and load-break capability but carries no overload or short-circuit protection. Rated continuous current Iu is 160 A on a 4-pole frame, with a rated insulation voltage Ui of 800 V and maximum operational voltage of 690 V AC 50/60 Hz or 600 V DC. The short-time withstand rating is 2 kA at both 1 s and 0.5 s, meaning it can pass fault current for that duration without damage while upstream protection clears the fault.
Shunt trip and auxiliary release
The front terminal accepts busbar connection for the main circuit; the optional motor drive is available as a field-installable accessory.
Dimensions are 70 mm deep, 101.6 mm wide, and 130 mm high — the 4-pole width is wider than the standard 3-pole 76.2 mm footprint, so a panel designed for a 3-pole 3VA will need additional DIN rail space or a different gland plate cutout. Front protection class is IP40, suitable for enclosed panel mounting; operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.
How it differs from a circuit breaker sibling
The closest peer in the same frame size is the 3VA1110-5EE32-0JA0, a 3-pole 100 A molded-case circuit breaker with TM220 thermal-magnetic overcurrent release and a switching capacity class M (187 kA at 240 V). The key difference: the 3VA1116-1AA42-0KA0 is a switch disconnector with no overcurrent protection — it cannot clear a fault on its own and relies entirely on upstream protection. The 3VA1110-5EE32-0JA0 also uses lug terminals rather than busbar connection, and its 76.2 mm width means it occupies less DIN rail space. For a panel already wired for a 3-pole breaker, the 4-pole 3VA1116-1AA42-0KA0 will not drop in without rewiring and widening the mounting footprint.