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Glowing combustion must not exceed after the second flame application. Common Substrate Usually FR-4 (Flame Retardant 4) glass-reinforced epoxy. Why This Rating Matters

When you see this string on a PCB, it identifies two key pieces of information:

Because "SH1 94V-0" is a safety classification rather than a single component, its "datasheet" refers to the performance of the board material under the UL 94 vertical burn test: Specification

: This is typically a manufacturer's internal code or a UL (Underwriters Laboratories) file identifier for the board's fabricator.

Total for 5 specimens (10 applications) must not exceed . Flaming Drips

flaming particles are allowed to drip and ignite cotton placed below. Afterglow Duration

The marking found on printed circuit boards (PCBs) is not a specific product part number but a combination of a manufacturer's code and a critical fire safety rating. Specifically, "94V-0" refers to the highest flammability standard for plastic materials used in electronics. What is SH1 94V-0?

: This is the UL 94 flammability rating, signifying that the board substrate (usually FR-4) is self-extinguishing and meets strict safety standards. Core Technical Specifications (94V-0 Standard)

The 94V-0 rating is a prerequisite for most commercial and industrial electronics because it prevents a small electrical spark from turning into a full-scale fire. UL94 V-0, V-1, & V-2 Flammability Standard | - RTP Company

Must stop burning within after removing the flame. Total Flaming Time