What this 3VA1 breaker brings to the panel
The 3VA1110-6GF42-0AA0-ZD00: This is a Siemens 3VA1 IEC frame 160 circuit breaker, 4-pole, with a breaking capacity class H rating of Icu=70kA at 415V. That 70kA figure means it can safely interrupt a fault current up to 70,000 amps without welding its contacts or rupturing — essential for high-fault locations like transformer secondaries or large motor control centers where the available short-circuit current is substantial. The TM240 thermal-magnetic trip unit gives you an adjustable overload protection band from Ir=70A to 100A, and short-circuit pickup Ii=5 to 10 times In. On site, that means you can dial in the continuous current to match the actual load without swapping trip units — handy when the nameplate says 85A but the breaker was ordered at 100A. The N-conductor protection is set at 100%, so the neutral pole tracks the phase poles; no derating needed for balanced or unbalanced loads. It ships with a nut keeper kit and is built for a DC Power OEM in China — the nut keeper saves a headache when you're torquing conductors in a tight enclosure and don't want to chase dropped hardware. The 4-pole form factor fits standard DIN-rail or panel-mount installations in IEC switchgear.