Original Bosch electronic assembly (part no. 2610021281) — direct replacement circuit module that mounts to the motor and restores on/off, variable-speed control and indicator lights on compatible Dremel/Bosch rotary tools. The unit comes pre-wired and includes the speed potentiometer and switch assembly so you can swap it in without fabricating connections; a Torx driver and pliers are typically all that’s needed and the swap usually takes about 15–30 minutes.

Fits Dremel / Bosch 8220 cordless rotary tool (Bosch type F013822000) and is listed as the correct electronics assembly for that model — a good match when the variable-speed or on/off functions have failed. If you’re replacing a failed control board this original Bosch part is the exact electronics module used on the model. This is a common repair item among power tool parts for restoring tool function quickly.