What this breaker is and what it does
The Siemens 3VA1010-4ED32-0AA0-ZD00 is a 3VA1 IEC frame 100 molded-case circuit breaker, 3-pole, rated In=100A with a breaking capacity class S delivering Icu=36kA at 415V. That 36kA interrupting rating means it can safely clear a fault up to that level without upstream cascading — critical for a main or feeder breaker in an industrial panel where available fault current is high. The TM210 thermal-magnetic trip unit gives fixed overload protection at Ir=100A and fixed short-circuit protection at Ii=10 x In (1000A). The FTFM designation indicates it's a fixed, non-interchangeable trip — what you order is what you get; no field trip-unit swaps.
What the ratings mean for fit
The fixed Ir=100A and Ii=10 x In (1000A magnetic pickup) suit this breaker for a feeder or large branch circuit where the load current is stable and known — a motor control center feeder, a distribution panel main, or a dedicated load like a 100A-rated compressor or pump. The 36kA @ 415V SCCR means it can be applied downstream of a transformer with substantial fault capacity without needing a current-limiting fuse ahead of it; verify the available fault current at the point of installation does not exceed 36kA. The 3-pole configuration covers three-phase systems. The nut keeper kit (included for the DC Power OEM variant) adds a mechanical anti-vibration feature for the line-side lugs — useful in high-vibration environments like near large contactors or drives.
Where this class is used
Molded-case circuit breakers in the 3VA1 frame (100A frame size) are standard in industrial control panels, switchboards, and motor control centers. They mount on DIN rail or bolt directly to a busbar system. The 3-pole design fits three-phase power distribution. The fixed trip means no field adjustment — specify the exact overload and short-circuit settings at order time, which this code does.