Are JST-SD conectors ok?

Questions
1

I’m building out a new kitchen and bath, and want to make a modular install for future maintenance. So to that end, I’d like to have connectors on both ends of every LED strip. I am building custom-length units with aluminum channel, defusers, and pigtails with a connector on each end.

The strips I buy from BTF-lighting on Amazon all have JST-SD connectors and 20-gauge wire. I thought I’d go with this because I’d get two “free” pre-made ends with every LED strip I buy. But I looked up the specs, and JST-SD is good for only 3 Amps. Some of these LED strings use a lot of power. One is about 50W per meter.

I have decent soldering and crimping skills, hot air workstation and all, so I am not trying to avoid work but it seems that if the factory puts 20 gs. JST-sd on full-length strips, maybe it is OK? I should just use that as my new standard.

If I want higher-rated connectors, what are people using?

Kitchens have a LONG lifetime, 50 years is not uncommon and I am sure that technology will evolve and stuff will fail and I will need to be able to replace parts without ripping up walls. I’m using low-voltage conduit. I’ll need to decide on a connector soon.

2

I don’t see a problem using them and just so you are aware, they are JST SM not SD :wink:

You can’t send that much power through 1 end of an LED strip anyways. To correctly power the strip you would need more injection points to ever reach it’s max rating. The thin copper trace in the strips, voltage drop/resistance would never allow for it. An end injection is good for like 3-5 amps max.

You could go with 18AWG connectors like these: Amazon.com: KWMSTPLT 20 Pairs SM JST 3 PIN Wire Connector Cable for WS2812B WS2811 SK6812 LED Strip Lights, 15cm 18 AWG Male and Female Without Soldering Light Controller Wire : Tools & Home Improvement

3

Thanks. I was too dumb to think about the power in each connector. End injection cuts power per connector in half, and it is unlikely I would be using a full strip as they have to be cut to size. I’m testing now and will let a worst-case build run on a bench overnight to see if anything gets warm

4

Thank You… I needed those connectors also for the chandelier I’m working on

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:slight_smile:

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