(Except Chinese public holidays)
0 - Reflects the highest V rating per UL 94, denoting resistance to burning and fire spread. V ratings of 0, 1, or 2 indicate successively less stringent criteria:
● V-0: Burning stops within 10 seconds. No flaming drips permitted. Total burn duration before self-extinguishing < 30 seconds.
● V-1: Burning stops within 30 seconds. Flaming drips are allowed. No inflammation after flame removal.
● V-2: Burning ceases within 30 seconds. Flaming drips are permitted. Traces of inflammation are allowed after the test.
The resin gives 94v-0 PCBs an unusually high glass transition temperature over 100°C. This allows the boards to handle rapid heating and cooling cycles without damage like cracking that could lead to electrical shorts and component failure. This thermal durability makes these boards suitable for electronics in hot environments like inside appliances.
The unique properties of 94v-0 printed circuit boards make them suitable for use in various electronics applications, especially those involving heat, moisture, or other environmental stresses. Some of the most common 94v-0 board applications include:
For outdoor lamp posts, landscape lighting, commercial signs, and similar exterior electronics, 94v-0 PCBs withstand constant exposure to the elements. Their dimensional stability prevents cracking, while moisture resistance allows operation through all seasons of sun, rain, salt air, snow, and rapid weather changes that erode standard circuit boards over time.
To receive the 94v-0 rating, the PCB laminate must meet specific UL 94 vertical burn criteria:
Prevwhat is cold solder joint and how to avoid it
Nexthow do circuit boards work