# How much current do I need for a 5050 RGB strip? [closed]

I want to use 5 meters 5050 RGB Waterproof 300 LED Strip + 20 Key Music IR Remote Controller Sensor. Is it okay if I use a 12V 6A Power Supply?

• Current consumption of an LED strip is dependent on length. – uint128_t Jun 25 '16 at 15:09
• Possibly useful – uint128_t Jun 25 '16 at 15:10
• A little bit of googling, and I found this: An article explaining how to chose the correct power supply for an LED strip: ledlightsworld.com/page.html?id=38 – Alex Jun 25 '16 at 15:56
• There are too many possibilities with just "5050 LED" as the spec. I think my answer is correct - and it precisely matches the calculator you provided for the individual LEDS they are using. IF by 300 LEDS you means 300 emitters with 3 per pkg = 100 pkgs then my answer is about right. BUT you can get 5050 LWDA at many times that current rating - not usually in LED strips though. Please provide more information. – Russell McMahon Jun 25 '16 at 16:05

The manufacturer or supplier should specify current per length of strip.

As a "rule of thumb" most small LEDs are rated at 20 mA and groups of 3 are connected in series plus a series resistor to 12V. So approximately power dissipation for N LEDs =
Power = V x I = 12V x 20 mA x N/3 = 80 x N mW.
And I = 20 mA x N/3

For N = 300
Power = 80 x 300 mW = 24 Watts
& I = 20 mA x N/3 = 20 x 100 mA = 2A.

I think this one is correct :-).
I'll check the ratings of some 5050 LEDs but I think the other answer may not have allowed for the 3 LEDs per package.

• This is correct for 12V 5050 led strips which are near universal in their specs. 2 A Per channel of 100 3-led segments. The newer types vary based on the diode size used, as the packages may be the same but some have higher internal diode counts or shapes. Two 5630 strips can be completely different. – Passerby Jun 25 '16 at 19:55