What This Part Is and Where It Fits
The Siemens SENTRON 3VA9448-0CB10 is a Max-Flex switch module configured as a Bowden wire actuator — a mechanical remote operator for the 3VA5/6 400 A and 600 A frame molded-case circuit breakers. It mounts to the breaker front cover and lets you trip or reset the breaker from a control panel door or a remote station via a flexible cable, keeping the arc flash boundary outside the operator's reach during normal switching. This is not a standalone breaker — it is the mechanical interface that converts rotary handle motion through a cable pull, sized for the 3VA5 and 3VA6 frames at 400 A and 600 A respectively.
Lifecycle and Sourcing Reality
For BOM-line commitment or a line-down replacement, this part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
What the Ratings Mean for Fit
The Bowden wire actuator version means the operator station can be located several feet from the breaker — useful when the breaker is deep inside a panel or in a restricted-access enclosure where a direct rotary handle would be impractical. Compatibility is limited to the 3VA5 and 3VA6 frame sizes at 400 A and 600 A; it will not fit the smaller 3VA1/2 frames or legacy 3VL breakers without an adapter plate that Siemens does not list for this order code.