What this breaker is and what it does
The Siemens 3VA1010-4ED42-0AA0-ZD00 is a 3VA1 IEC frame circuit breaker rated at In=100A with a fixed overload protection Ir=100A and fixed short-circuit protection Ii=10 x In. Its breaking capacity class S delivers Icu=36kA at 415V across 4 poles, making it suitable for line protection in industrial distribution panels where fault currents can hit that level. The TM210 trip unit provides thermal-magnetic protection; the FTFM (Fixed Thermal Fixed Magnetic) design means no field-adjustable settings — what's on the nameplate is what you get.
Deployment context
This 4-pole breaker mounts on a standard DIN rail inside an enclosure. The N conductor is unprotected — that's typical for a 3-phase + N configuration where the neutral is not switched or protected. The nut keeper kit included is a nice touch for DC Power OEM builds in China, saving a few minutes per panel on captive hardware.