What this breaker is and what the ratings mean
The Siemens 3VA1150-6ED42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker with a 70 kA interrupting capacity at 415 V — that's class H breaking capacity, meaning it can safely clear a fault up to 70,000 symmetrical amps without welding or rupturing, which is the spec that decides whether it holds on a high-fault panel or upstream of a transformer. The TM210 thermal-magnetic trip unit is fixed at In=50 A overload protection (Ir=50 A) with a fixed short-circuit pickup of Ii=10 x In (500 A). The thermal element handles sustained overloads on a motor or feeder; the magnetic element clears hard shorts. No adjustment range on this variant — what's on the nameplate is what you get. This is a DC Power OEM variant built for the China market, with the N conductor left unprotected and a nut keeper kit included. The neutral pole is a straight-through pass — no overcurrent protection on that leg — so it's intended for 3-phase + N systems where the neutral is bonded at the source and not expected to carry fault current.
Where it fits in the panel
Mounts in a standard IEC frame 160 footprint on a DIN rail or panel-mount baseplate. The 4-pole construction takes up the same width as a standard 4-pole MCCB in this frame — plan for roughly 105 mm of DIN rail space per unit. The nut keeper kit holds the line/load lug nuts captive during wiring, which saves time on a production line or during a panel build.