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Surface Mount PLCC-4 SMT LEDs FAQs

All Customer Questions

PLCC-4 Surface Mount LEDs
PLCC-4 Surface Mount LEDs
Q: I'm trying to replace LEDs on my dash on my 2012 JKU and I can tell they're PLCC-4s but the problem is, I don't know if they're common anode or cathode. How do I go about finding this out? I tried supplying 1.5 V across all of the pins in every possible combination, but no luck. However, doing the same thing on the PLCC-2 LEDs on the board does light them up. PLCC-2's have an A and a K on each side of the board and they seem to (at least I think) correspond to anode and cathode. On the PLCC-4 pads, one says A with a W next to it, the other K. Supplying 1.5 volts to it does not seem to do anything. Any help here would be very much appreciated. I need to get this thing working ASAP! Thank you.
A: Its possible you need to apply more voltage than 1.5 in order for them to light up.
Q: Will one PLCC-4 emit 3 different colors depending on which anode is connected (in a common cathode lamp)? - by David (Delaware)
A: Yes, assuming you have an RGB LED.
Currently we only offer single color PLCC-4 LEDs.
We can certainly provide you with RGB PLCC-4 LEDs in a 3528 package size.
How many do you need?
Q: now with these do you have to replace of the resistors on the circuit board so that these style of leds will last longer or is or to run what ever resistors that came on the circuit board from the factory? - by Cooper (United States)
A: It depends on the voltage of the LEDs you're replacing. If the voltage of the LEDs you're replacing is the same or more than the voltage of the new LEDs you're putting in, then you of course don't have to change the resistors. If however you're putting in an LED that uses less voltage than the ones you're replacing, then you'd need to change the resistors so your new LEDs don't get burnt out.
Q: How do I know with the PLCC-4 if I need an anode one or a cathode one? - by Matthew (Australia)
A: One method would be to use a volt meter to figure out the polarity of the pins on the circuit board where you're installing them.

Common anode has 1 positive pin, and 3 negative pins
Common cathode has 1 negative pin, and 3 positive pins
Q: if i use a plcc-2 to replace a plcc-4 would that work?
A: You'd likely have to modify the PLCC-4, but it is possible to get it to work.