The Siemens 3VA1216-5EF32-0AD0 is a SENTRON 3-pole molded case circuit breaker rated 160 A at 40 °C, with a TM240 thermal-magnetic release designed for line protection. That TM240 designation means the thermal trip is fixed at 160 A (the frame rating), and the magnetic short-circuit pickup is adjustable — typical for feeder protection where you need coordination downstream. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V, so this breaker can handle high-fault-current scenarios like transformer secondaries or large motor control centers without cascading failure upstream.
Mounting dimensions and panel fit
The 70 mm depth leaves room for rear-connected busbars or a separate shunt-trip accessory.
Above that it derates linearly: 156 A at 55 °C, 151 A at 60 °C, 147 A at 65 °C, and 142 A at 70 °C. The minimum operating temperature is -25 °C, which covers most unheated warehouses in temperate climates. Maximum power loss is 33 W at full load — factor that into the enclosure thermal budget if you're stacking several breakers side by side.