Have anyone the numbers for the thermal conductivity on these DTP Mcpcb?
I been searching but I don’t find anything.
I can only find Kdlitker ones with good shipping cost here in EU.
Does those have some worse characteristics vs the Noctigon and SinkPAD-ii?
If you compare them with the Noctigons they are more round then starshaped (have less “holes” on the sides). Does they still fit some flashlights where you can screw down the Mcpcb?
Anyone know some good source for the Noctigon or SinkPAD-ii here in EU?
I don’t have numbers, but all my triple and single emitter MCPCBs are KD or SinkPad II. Ordered from Fasttech, KD, aliexpress and ebay (LEDDNA).
IMO, I don’t see a big difference in output, my lights measure pretty much the same. Temperature (measured with IR thermometer around the flashlight head outside) has slight variations but that could mean anything. The build quality is way nicer on the SinkPads compared to KD mcpcbs but other than that…
It appears (I am not sure!) that KD might stamp the mcpcbs as they are slightly curved and the others are maybe CNC? Or cut with a waterjet? SinkPads II and (on pictures) Noctigon look amazing. My KD boards work fine but I had to sand them off a little bit. Not a big deal when modding a light!
Relic38 has done a comparison test once between Sinkpad and Noctigon, I have compared copper and aluminium Sinkpads, and a crude DIY DTP board (cutting out the dielectric layer in the thermal pad of a copper non-DTP board and filling the gap up with solder).
The results are that with the dielectric layer absent, the real life performance of any DTP-board is comparable and very good.
The only disadvantage of the KD boards is that, compared to Noctigons, the layers can delaminate more easily when the board is made very hot, but for normal reflow temperatures that is not an issue.
LEDDNA ships to EU (had them ship XML2s last year to a remote work/office location), was really fast as well. Bought via their ebay.com shop but they also have a web store.
The copper plate still looks okay to use again… :disappointed:
I always wonder why even DTP boards use quite thin layers of copper for the circuit. I guess they were not designed for the currents we push through them today.
