I have an LED that I cannot identify! I have come across it twice from equipment I have taken apart (small spot beam headlight, and a dental drill motor illumination source, designed to light up a fibre optic light guide)
I don’t know what LED this is, or where its from.
- It measures as a 3030 led with 3.0mm sides.
- Most interesting is that it has a smaller diameter but taller dome. Good for projecting light forwards rather than outwards.
- It has a fairly familiar looking pad layout with a central electrically isolated thermal pad.
Forward voltage measures on my DMM at 2.45v, and very curiously its reverse voltage measures at 0.68v rather than open circuit.
Thank you all in advance if you can identify this, or point me in the right direction, and where I can buy it Thumbs Up
Thank you all in advance if you can identify this, or point me in the right direction, and where I can buy it :+1:
And for those who are curious as to where the LED comes from, this is the electric motor unit that drives a dental drill handpiece. The motor unit has an inbuilt LED light source that shines though a light guide in the dental handpiece and allows for illumination of the drill head. The LED is indicated by the Red arrow. The LED sits under the grey plastic moulding and shines out and through the hole in the metal plate.
I did not keep up with all new Osram leds (3030 for a power led is quite typically Osram), but the Oslon SSL80 leds came with these tall domes (together with a small 1mm2 die the emission angle is made narrow, 80 degrees). This could be one of the newer generation SSL80, the small die size makes it lower power than the Oslon Square.
Edit: yes, I think this is indeed a SSL80, like the one in this link:
I couldn’t find this in any documentation they had online, or even in my manuals. I do see mention of 5000k and one did mention 90 CRI, however in the Osram SSL80 line, they only have 90+ CRI up to 4000k, or 80+CRI for 5000k. Either they have a better LED, or the specs are not totally correct, which is not unlikely.
And thats a cheap headlamp in the dental industry… the branded models start around the $1000 mark and their fancier ones are upward of $2000!! I think thats ludicrous for what was essentially and LED and a lens, paired with a lithium battery pack.
I guess they have to pay for warranty, low volume manufacturing and relatively reliable build quality and design. I used my own DIY headlamp for a good 10 years before the optical design and performance of a cheaper unit finally surpassed mine.
Thanks for the insight, I agree with you that the datasheet and led techincal diagrams better match what I have. The 80 degree emissivity angle is very appropriate for the applications these are used for. It would be a good match for a dental LED headlight where spill light is a bad thing and is steps are taken to reduce or eliminate it from the light output.
Thank you everyone for their help and I think we have narrowed it down to a Osram SSL80.
I am looking for places to purchase it and it seems the closest I can find is a
4000k 90+ CRI, part number GW CS8PM1.CM-KULQ-XX55-1-350-R18
Would prefer a 5000k at 90 CRI but might try the 80CRI one too.
