: This is typically a manufacturer's internal code or a specific PCB stack-up type. It is commonly seen on boards manufactured by companies like HannStar or P&Q . Potential Devices Using "CM-4 94V-0"
| Term | Meaning | |--------|---------| | 94V-0 | UL94 vertical burn test rating – Class V‑0 (best self‑extinguishing) |
Once you have your PCB and schematic, perform these sanity tests:
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This is a UL 94 flammability standard indicating the PCB material is fire-retardant. A board with this rating will self-extinguish a vertical flame within 10 seconds and will not produce flaming drips.
