Need same color bi-directional LED 3mm

Ok, here is your part, T-1, 3mm, green, bi-polar.

You can get samples from Kingsbright or buy then from Digikey or Mouser from stock.

Seems you were looking at the international web page where they use a different part number for some reason. On the US page they list the above part number WP937GGD.

They don't say this is a bi-polar or even bidirectional part in the data sheet. You have to notice the schematic symbol. I expect this is why Digikey and Mouser don't list them that way, rather as "conventional". Goofy.

Rick C.

SunLED has a family of Bi-Polar (two-lead) 3mm LEDs, including Green/Green:

Octopart claims to know the part numbers, but no distributors found. Since you have some time, you could ask SunLED whether these are vaporware or just stocked in strange places.

"Omorn" brand - at first glance I read Omron. --

(perhaps) interestingly, bipolar same-color LEDs seem to be pretty availabl e off the shelf in China, in smallish quantities (eg. a bag of 1K). For exa mple, diffuse blue-blue 3mm. Maybe nobody wants to bother exporting them fo r onesy-twosy customers who come along once in a ?? moon.

--sp

I filed a correction request with Digi-key and they notified me the listing has been corrected to be displayed on the next website update. :)

Now how many other such LEDs are mislabeled on the website because the maker doesn't list them as bi-polar or bi-color?

Rick C.

Thanks, but the above Lumex LED is 5mm and I need 3mm. It's to

Most likely they are built there by the *illion and put into household goods in large quantities as mains power indicators instead of the old neon glowlamps.

A bidirectional same color led with a resistor is probably the cheapest mains indicator you can make that would not be actively irritating.

Anything less means using a single polarity led, and that flickers so ghastly that even the most insensitive customers will complain. Also, it loses brightness quickly because of reverse voltage breakdown every other mains cycle.

ble off the shelf in China, in smallish quantities (eg. a bag of 1K). For e xample, diffuse blue-blue 3mm. Maybe nobody wants to bother exporting them for onesy-twosy customers who come along once in a ?? moon.

I was just thinking if you can't get em here, maybe time to look at some of the less trusted foreign suppliers.

I'd also be very tempted to just stick a couple of sm leds in there back to back. The white plastic should distribute the light passably well.

NT

RGB LED?

Robert Martin

Thanks, but no. It won't work. Same problem as a bi-color LED. There's no easy way for it to EASILY fit into the relay enclosure, operate on 24VDC with any polarity, and always show green, without adding additional diodes and resistors. Several people were nice enough to find LED's that will work without additional parts. However, they're difficult to find in the US, making this a procurement exercise, instead of an engineering challenge. I'm now waiting for some parts to arrive.

Digikey isn't easy enough? Stock, $21.26 for 100 plus postage.

Rick C.

On order from Digikey as of two days ago. I'm told that there are some packages waiting for me in my office. I'm expecting the above green-green 3mm LED, some green-red flashing 3mm LED's I ordered by accident, and some SMD 0805 green LED's to try connecting back to back across the existing LED. With all the possible choices, something is sure to work.

Also, I've been busy for the last 4 days and didn't have a chance to thank you for noticing the change in Kingbright part number between international and US catalogs, and the lack of a proper description in both Digkey and Mouser. The Digikey web page now shows "bi-directional" instead of "conventional". I don't think I would have found the part without your help. Thanks.

e:

Digikey is pretty responsive to correction suggestions. I pointed out to t hem the error, not only on their web site, but in the manufacturer's data s heet. The real trick will be getting Kingbright to fix that short coming. I think Digikey must have an engineer on their staff working these issues because this person was able to read the data sheet and see the same thing I did, no description, but the bi-directional schematic.

This is a small payback for all the great help you have posted to the group and in particular to me. I only wish you were local so I could bring you my computer problems. Sometimes I hate working on them.

Rick C.