What this breaker is and what the ratings mean
The Siemens 3VA1116-6EF32-0AA0-ZD00 is a 3-pole IEC frame 160 molded case circuit breaker rated for line protection with a TM240 thermal-magnetic trip unit. Its headline breaking capacity is 70 kA at 415 V (class H), meaning it can safely interrupt a fault current up to 70,000 A at that voltage without welding contacts or rupturing the case — critical for high-fault installations like transformer secondaries or large motor control centers where available fault current is high. Overload protection is adjustable via the TM240 unit: Ir from 112 A to 160 A, so you set the continuous current limit to match the load cable or bus. Short-circuit magnetic pickup Ii is fixed at 5 to 10 times In (800 A to 1600 A), which is typical for distribution feeders — fast enough to clear a bolted fault but rides through motor inrush.
Deployment context and integration
This breaker mounts in a standard IEC panel or enclosure on a DIN rail or direct screw-mount base. The nut keeper kit included is a small but practical detail for DC Power OEM builds in China — it prevents the terminal nuts from dropping into the panel during wiring, saving a frustrating retrieval job on a live bus.