Original Fein speed controller — part no. 30762453990. This genuine Fein electronic speed-control module replaces the internal control board that governs variable motor speed on corded Fein oscillating multi‑tools.

Features: precision electronic speed regulator (Drehzahlsteller) assembled as the factory replacement electronics for the tool’s control bay — restores smooth variable‑speed operation and resolves intermittent or non‑responsive speed control.

Fits (examples): compatible with a range of Fein MultiMaster / SuperCut and MM-series models such as FMM350Q, FMM350QSL, FSC17 / FSC17Q, FSC500QSL, MM500 and MM700 (MM700‑1.7 / MM700‑1.7Q) — check your model label to confirm exact fit.

Why choose this part: it’s the original Fein electronics designed for direct replacement in the tool’s electronics housing, so you get the same control characteristics and reliability as the factory unit. Fein parts like this are intended to bring your tool back to original performance quickly.