First of all, I would like to say that we really need a real datasheet on SLD1236VL diodes, but it cant be found anywhere. The file posted as a datasheet everywhere, isn't a datasheet, it's a press release and lacks a lot of vital information, which should be present in a real one.
That being said, I have strong believes that diode with the code 5HJL isn't SLD1239JL nor SLD1236VL. I know what the code should be on SLD1236VL, going by the datasheet of that diode, they should be marked XXKL and not XXJL.
Since nobody seems to be able to get lot's of power from these diodes in comparison to the early ones, I believe they are SLD1236VL-54 which isn't the same as SLD1236VL.
Datasheet for SLD1236VL-54: maxpowa.telenet.be/electronics/lasers/SLD1236VL-54.pdf
(sorry, can't post links, you have to use the link in the post below this one, thanks Chimo)
It states 90mW (CW), but only 180mW (Pulse)
From the datasheet it shows what the markings should be and there we see this:
5H JL
XXXX
Year of production -> 5H <- month of production
so it's made in August (edit: NOT July, I made an error) 2005
JL <- product ID code, I can't believe they use it on any other diode, as that would identify both as the same product
I also see that SLD1239VL has product ID code KL from it's datasheet, which I believe is another pointer in the right direction
XXXX is the lot nr.
So anyone having a diode with 5HJL code should use the datasheet posted as a reference in designs.
I also see why there is so much confusion, they are SLD1236VL diodes but probably the -54 version, which has lesser specs than the original 250mW pulse version. Perhaps these are diodes that come from the same production line but didn't cut it to be run at 250mW (Pulse) and got sorted out into the -54 bin or something, like they do with other high rated electronic components (CPUs and such), where not all products meet the required specs, because of the high standards. But that's just a guess.
Steve
PS, when can one start posting links?
That being said, I have strong believes that diode with the code 5HJL isn't SLD1239JL nor SLD1236VL. I know what the code should be on SLD1236VL, going by the datasheet of that diode, they should be marked XXKL and not XXJL.
Since nobody seems to be able to get lot's of power from these diodes in comparison to the early ones, I believe they are SLD1236VL-54 which isn't the same as SLD1236VL.
Datasheet for SLD1236VL-54: maxpowa.telenet.be/electronics/lasers/SLD1236VL-54.pdf
(sorry, can't post links, you have to use the link in the post below this one, thanks Chimo)
It states 90mW (CW), but only 180mW (Pulse)
From the datasheet it shows what the markings should be and there we see this:
5H JL
XXXX
Year of production -> 5H <- month of production
so it's made in August (edit: NOT July, I made an error) 2005
JL <- product ID code, I can't believe they use it on any other diode, as that would identify both as the same product
I also see that SLD1239VL has product ID code KL from it's datasheet, which I believe is another pointer in the right direction
XXXX is the lot nr.
So anyone having a diode with 5HJL code should use the datasheet posted as a reference in designs.
I also see why there is so much confusion, they are SLD1236VL diodes but probably the -54 version, which has lesser specs than the original 250mW pulse version. Perhaps these are diodes that come from the same production line but didn't cut it to be run at 250mW (Pulse) and got sorted out into the -54 bin or something, like they do with other high rated electronic components (CPUs and such), where not all products meet the required specs, because of the high standards. But that's just a guess.
Steve
PS, when can one start posting links?
