Genuine Makita replacement trigger/power switch — part no. 650631-1 — a compact on/off trigger assembly with lock‑off function designed to drop into the original handle cavity and restore reliable power control. Fits a number of 18 V Makita tools; examples from Makita parts breakdowns include the DSS610 (165 mm cordless circular saw), BSS610 , DKP180 / BKP180 and BUC250RD.
This is the switch assembly listed in Makita’s parts diagrams (sold as the switch unit shown in the exploded view), so it mounts with the original screws and mates to the tool’s existing wiring/lead unit for a direct replacement install.
Listed among Makita spare parts for these models, the 650631-1 brings back dependable on/off and safety lock performance when a worn or damaged trigger is the reason your tool won’t start or won’t hold the lock‑off correctly.
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