I'm not sure what application this bare mains voltage LED tape is intended for, but the implication in the listing that it can be used under kitchen cabinets, in bathrooms and children's play rooms may not be appropriate.
Despite operating at full mains voltage, this tape can still be cut every 100mm (4") and does not need an external rectifier. It achieves this with built in rectifiers, multi-chip LEDs and current limiting resistors. Rather pleasingly it doesn't grill them for a change - even on a 245 volt supply.
The listing actually showed a linear current regulator on each section, but the tape that arrived has resistors. That's fine. It means there may be a slight intensity change with voltage fluctuations, but the resistors are going to be much more reliable than an active component.
The track spacing is squirmy for the voltages involved. This tape is not suitable for use anywhere with even the slightest risk of condensation forming, and if mounted onto a metal backing there is very little between mains voltage and the surface it's mounted on. Even hygroscopic adhesive could pose an issue.
The only places this tape could be used are in well insulated or grounded enclosures to avoid the risk of it being touched. The possibility of the tape parting from its adhesive would have to be considered, and it definitely needs a low value fuse.
It's interesting stuff, but it has very niche uses. The listing I got it from is here:-
www.ebay.co.uk/itm/324757770303
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17 мар 2022
