What this breaker is and what the ratings mean
The Siemens 3VA1196-6EE42-0AA0-ZD00 is an IEC frame 160 molded-case circuit breaker in the 3VA1 series, configured for line protection with a TM220 thermal-magnetic trip unit. Its interrupting capacity is 70 kA at 415 V (breaking capacity class H). The 4-pole construction (three phases plus neutral) and the 'N conductor unprotected' note mean the neutral pole does not have integral overcurrent protection — it switches the neutral but does not trip on overload, which is standard for TN-S or TN-C-S systems where the neutral is bonded to earth at the source. The 'nut keeper kit for DC Power OEM in China' indicates this variant ships with hardware for DC-side applications in OEM equipment built for the China market, though the breaker itself is an AC-rated device.
Trip unit settings and selectivity planning
The TM220 trip unit gives an adjustable overload protection band Ir = 11 A to 16 A, so the breaker can be set to match the full-load current of the downstream load within that window — useful when the exact load current is known at commissioning but may shift between 11 and 16 A. The instantaneous short-circuit pickup is fixed at Ii = 20 x In (320 A at the 16 A rating), which is a magnetic-only threshold that clears hard faults fast. For selectivity with downstream 10 A or 13 A MCBs, the 20x multiplier gives enough gap to avoid nuisance tripping on branch faults; for a 16 A feeder feeding a 16 A final sub-circuit, coordination may require a time-delay setting not available on this thermal-magnetic unit.
Panel integration and mounting
The breaker mounts on a standard DIN rail or can be screw-fixed to a backplate in an IEC distribution panel. The 4-pole footprint at frame 160 takes up roughly 72 mm of DIN width per pole (288 mm total for four poles) — plan for that in the enclosure fill factor, especially if derating for side-by-side mounting without gaps.