Original Bosch switch — part no. 1607200254. This genuine Bosch on/off switch is the direct replacement switch module used in select Bosch random-orbital sanders and multi-sanders; it’s a compact, snap-in style switch designed to match the original mounting and electrical contacts for a clean, no-modification replacement.

Fits example models:

• Bosch PEX 300 AE Random Orbital Sander (Fits tool type reference 3 603 CA3 000)
• Bosch PEX 400 AE Random Orbital Sander (Fits tool type reference 0 603 310 603)
• Bosch PSM 200 AES Multi/Orbital Sander (Fits tool type reference 3 603 CB6 000)

Why it helps: replacing a worn or damaged switch restores reliable start/stop control and safety features without changing the tool’s fit or performance. Keep your Bosch tools running with genuine Bosch power tool spare parts and avoid improvising with incompatible controls.

Quick note: this is the specific switch assembly for the models listed and is commonly used when servicing parts for power tools; it installs by accessing the tool’s housing and swapping the module into the original position — no re‑wiring or machining required for compatible models.

Browse our full range of Bosch sander parts.