Siemens 3VA1 IEC frame 400, 3-pole circuit breaker, breaking capacity class H, Icu=70kA @ 415V, TM220 line protection, ATFM, In=400A, overload Ir=280A...400A, short-circuit Ii=10 x In, nut keeper kit for DC Power OEM in China.
The TM220 thermal-magnetic trip is a fixed-time curve, not electronic; if the application needs adjustable short-time delay for selectivity with downstream feeders, you would step up to a 3VA2 with an ETU electronic trip.
The nut keeper kit is a factory-fitted accessory that retains the terminal nuts during high-vibration shipping or operation — common on OEM builds destined for DC power cabinets. Three-pole form factor occupies the standard 3-module width on a DIN-rail assembly.
The interrupting capacity (Icu) is 70 kA at 415 V AC, which is the class H rating for the 3VA1 IEC frame.
Overload protection (Ir) is adjustable from 280 A to 400 A. Short-circuit protection (Ii) is fixed at 10 times the rated current (In=400 A), so 4000 A instantaneous pickup.
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer.
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