What this breaker carries
The Siemens 3VA1020-4ED32-0CC0 is a 3-pole IEC frame 100 circuit breaker rated for 20 A continuous with a fixed thermal-magnetic trip (TM210). The breaking capacity hits 36 kA at 415 V — class S — which means it can interrupt a fault up to that level without upstream devices needing to clear it. That's the number that decides whether this breaker coordinates with your existing distribution panel or forces a re-spread.
Protection and accessories built in
Overload protection is fixed at Ir = 20 A; short-circuit protection trips at Ii = 16 x In (320 A). No adjustment range — set and forget for a fixed motor or feeder circuit. The part ships with an undervoltage release (UVR) rated 120–127 V AC 50/60 Hz, plus two auxiliary switches (HQ) and a nut keeper kit for the mounting hardware. If your BOM calls for UVR and aux contacts on the same breaker, this order code bundles them — no separate add-on ordering.