The Siemens 3VA1020-3ED36-0CF0 is a 3VA1 IEC frame 100 circuit breaker rated for 20 A with a TM210 thermal-magnetic release — fixed overload Ir=20 A, fixed short-circuit protection Ii=16 x In. Breaking capacity lands at 25 kA @ 415 V (class N), which covers most industrial distribution panels downstream of a larger feeder breaker. This unit ships with an integrated undervoltage release rated 120-127 V AC 50/60 Hz and one auxiliary switch, so it's ready for safety circuits that trip the breaker on loss of control voltage.
Clamp connection terminals accept copper conductors without lug crimping — speeds panel wiring on a DIN-rail assembly. The 3-pole form factor fits standard 3VA1 mounting footprints; the undervoltage release and auxiliary switch are factory-installed, so no field-assembly labor or spare-parts tracking for those accessories.