3L102B (3Л102Б) visible red LED (Light Emitting Diode), gold plated (clear lens)

AL102A (АЛ102А) red LED (frosted lens)

From the seller:
"I do not have the original data sheet but these are the notes that I have on the 3L102B (3Л102Б):

•Light colour: RED
•Intensity: not less than 0.25 cd/m2
•Continuous direct voltage: not more than 2.8V
•Maximum spectral distribution: 0.69 m
•Maximum permissible continuous forward current: 20 mA
•Maximum surge current for a given pulse duration: 60 mA at 2 ms
•Maximum allowable reverse DC voltage: 2 V (max pulse reverse is the same)
•Maximum ambient temperature 70°C

There may be data sheets on line. I believe the other has similar specifications.

With regard to the diffuser on the АЛ102АM, this is an intentional diffuser and is just a blob of epoxy on top of a piece of clear glass. If the epoxy is carefully removed you can see the LED behind glass like the other one. From the ones I have seen, the epoxy varies in colour from clear through a milky white to an off yellow. Quality varies considerably, with those with no air bubbles being clearer, and some which look like they have dirt or dust inclusions within the epoxy. I can’t recall the exact one I sent, but the comment about polishing sounds like it must be one of the clearer ones, as the finish on some of the ones with bubbles is quite rough. I haven’t tried polishing them."
