Always start with the manufacturer:
the board belongs to. Common products with this marking include: Monitors/TVs: Frequently found in mainboards and power boards. 3D Printers: Used in components like the Bambu Lab potentiometer board Rectifiers: There is a specific semiconductor SH1 Rectifier sh1 94v-0 datasheet
Compare the found datasheet's pinout with your PCB's function (e.g., gate driven by a microcontroller → logic-level MOSFET). Always start with the manufacturer: the board belongs to
This is likely a specific factory or vendor code assigned by Underwriters Laboratories (UL) . Manufacturers use these codes to identify the specific production line or facility that fabricated the raw PCB. sh1 94v-0 datasheet