: This is a UL 94 flammability rating, which is the most common safety standard for plastic materials used in electronic devices. UL 94V-0 Standard Specifications

The marking found on a printed circuit board (PCB) is not a specific model number for an electronic component, but rather a combination of a manufacturer's identification code (SH1) and a safety certification (94V-0).

: This is typically a manufacturer's internal code or a UL file "mark" indicating the factory that fabricated the raw PCB.

The flame cannot reach the top holding clamp of the test specimen. Why This Rating Matters