3MM 4-Pin Common Anode RGB LED Diffused Nipple Pkg Keyboard Arduino 5 10 25 100

$7.19

3MM 4-Pin Common Anode Diffused RGB LED - Nipple Package. Choose 5, 10, 25, or 100-piece pack. ⚠️ ALWAYS use a current-limiting resistor on every channel -- no resistor = instant burnout. Lead 2 (longest) = Anode (+).

Lead 1 = Red | Lead 3 = Green | Lead 4 = Blue (RGB order).

Specs: Vf Red 1.9-2.1V / Green 3.1-3.3V / Blue 3.0-3.2V. Max 20mA per channel. Luminous intensity: Red 600-1000mcd, Green 3000-4000mcd, Blue 600-800mcd. Viewing angle: 30°. Diffused lens. Base 6.5x2.35x3.3mm (0.26x0.09x0.13 in). RoHS.

Resistors at 5V/10mA: Red=300Ω, Green=180Ω, Blue=180Ω. At 3.3V: use min 33Ω on green and blue -- very limited voltage headroom at 3.3V; 5V supply recommended.

⚠️ RGB vs RBG: This is an RGB LED (Lead 3=Green, Lead 4=Blue). Keyboard PCBs wired for RBG will display swapped green/blue. Verify your PCB type before ordering.

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Lead 1 = Red | Lead 3 = Green | Lead 4 = Blue (RGB order).

Resistors at 5V/10mA: Red=300Ω, Green=180Ω, Blue=180Ω. At 3.3V: use min 33Ω on green and blue -- very limited voltage headroom at 3.3V; 5V supply recommended.

⚠️ RGB vs RBG: This is an RGB LED (Lead 3=Green, Lead 4=Blue). Keyboard PCBs wired for RBG will display swapped green/blue. Verify your PCB type before ordering.

Ships from the USA. Fast handling.

3MM 4-Pin Common Anode Diffused Nipple-Package RGB LED -- 5, 10, 25 & 100-Pack Options

These 3mm nipple-package RGB LEDs combine red, green, and blue elements into a single 4-pin component. By independently controlling the brightness of each channel -- using PWM from an Arduino or any microcontroller -- you can mix virtually any color in the visible spectrum from a single LED. The diffused (frosted) lens blends all three channels into smooth, uniform color output, making these LEDs ideal for per-key backlighting in mechanical keyboards, status indicators, and color-mixing projects. Select your quantity using the option above: available in 5, 10, 25, and 100-piece packs.

⚠️ Always use a current-limiting resistor on every color channel. Connecting an LED cathode directly to GND or a microcontroller output pin without a resistor will instantly burn out the LED. See the Resistor Guide section below for recommended values. 📦 Package Options

Select your desired quantity using the variation selector above. All packs contain the same 3MM 4-Pin Common Anode Diffused RGB LED (EM-LEDLI-0005-DI).

Pack SizeQuantityBest For5-Pack5 LEDsPrototyping and small projects10-Pack10 LEDsSmall keyboard builds and multi-LED projects25-Pack25 LEDsMid-size keyboard builds and classroom kits100-Pack100 LEDsFull keyboard builds, production runs, and stock 📊 Specifications

Color Channel Specifications (tested at 20 mA)

ParameterRedGreenBlueForward Voltage (Vf)1.9 – 2.1V (typ. 2.0V)3.1 – 3.3V (typ. 3.2V)3.0 – 3.2V (typ. 3.1V)Dominant Wavelength620 – 625 nm520 – 525 nm460 – 470 nmLuminous Intensity600 – 1000 mcd3000 – 4000 mcd600 – 800 mcd

General Specifications

ParameterValuePackage Type3mm Nipple (Dome)Lens TypeDiffused (frosted)ConfigurationCommon Anode (Lead 2, longest lead = +V)Pin Count4 (Anode + Red, Green, Blue cathodes)Maximum Working Current20 mA per color channelViewing Angle30°Base Dimensions (excluding nipple)Approx. 6.5 × 2.35 × 3.3 mm (0.26 × 0.09 × 0.13 inches) W × D × HRoHS CompliantYesEnvistia Mall P/NEM-LEDLI-0005-DI 📌 Pinout

Hold the LED with the flat side of the base facing you and the leads pointing down. Leads are numbered left to right, 1 through 4. Lead 2 is the longest -- this is the common anode (+).

Lead #FunctionConnectionLead 1Red cathode (−)Through resistor to GND or PWM output pinLead 2Common anode (+) -- longest leadPositive supply voltage (5V recommended)Lead 3Green cathode (−)Through resistor to GND or PWM output pinLead 4Blue cathode (−)Through resistor to GND or PWM output pinCommon Anode PWM logic is inverted: analogWrite(pin, 0) = full brightness; analogWrite(pin, 255) = off. See our full User Guide for sample Arduino code that handles this automatically with a simple helper function. 🔋 Current-Limiting Resistor Guide

Each color channel requires its own resistor. Formula: R = (Vs − Vf) / If. The table below gives recommended values for the most common supply voltages. Running at 10 mA is recommended -- it extends LED life and stays within Arduino output pin limits.

Supply VoltageTarget CurrentRed (Lead 1)Green (Lead 3)Blue (Lead 4)5V20 mA (maximum rated)150Ω100Ω100Ω5V10 mA (recommended)300Ω180Ω180Ω3.3V10 mA130Ω33Ω ⚠️33Ω ⚠️⚠️ 3.3V Systems: The forward voltage of green (3.1–3.3V) and blue (3.0–3.2V) is very close to 3.3V, leaving very little headroom for current limiting. Always use at least 33Ω on green and blue at 3.3V, and expect noticeably reduced brightness on those channels. A 5V supply is strongly recommended for full brightness on all three channels. 🔌 Wiring to Arduino

Connect Lead 2 (anode, longest) to 5V. Connect each color cathode through its resistor to a PWM-capable pin. On Arduino Uno and Nano, PWM pins are marked with a tilde (~): 3, 5, 6, 9, 10, and 11.

LED LeadArduino ConnectionLead 2 -- Anode (longest)5VLead 1 -- Red cathode150Ω resistor → PWM Pin 9 (or any ~ pin)Lead 3 -- Green cathode100Ω resistor → PWM Pin 10 (or any ~ pin)Lead 4 -- Blue cathode100Ω resistor → PWM Pin 11 (or any ~ pin) 🎨 Color Mixing Quick Reference

PWM values below (0 = off, 255 = full brightness) are for use with a setColor(red, green, blue) helper function that automatically handles common-anode inversion. Full Arduino code is in our User Guide.

Green brightness tip: Green is 3–6× brighter than red or blue at the same current. For balanced white, try reducing green to around 120 while keeping red and blue at 255, then adjust to taste.ColorRed (0–255)Green (0–255)Blue (nominal)255255255White (green-adjusted)255120255Orange2551650 ⌨️ Keyboard Builders -- RGB vs. RBG Pin Order

This LED follows the RGB pin order: Lead 1 = Red, Lead 2 = Anode (+), Lead 3 = Green, Lead 4 = Blue. Some keyboard PCBs are designed for RBG LEDs, where green and blue leads are swapped (Lead 3 = Blue, Lead 4 = Green).

LED TypeLead 1Lead 2Lead 3Lead 4RGB (this product)RedAnode (+)GreenBlueRBGRedAnode (+)BlueGreen⚠️ Important for keyboard builds: Installing an RGB LED in an RBG-wired PCB will not cause damage, but green and blue colors will be swapped in all outputs -- cyan appears yellow, magenta appears red, and so on. Red always displays correctly. Always verify your keyboard PCB\'s required LED type before ordering. 🎯 Applications

Mechanical keyboard per-key backlighting -- Standard 3mm nipple form factor fits most keyboard switch openings
Arduino and microcontroller color projects -- PWM color mixing, fades, and color-cycle effects
Status and indicator lights -- Color-coded alerts and multi-state signals
DIY panel indicators -- Custom enclosures and control panels
Decorative and ambient lighting -- Low-power color accent lights
Educational kits and classroom use -- Teaching RGB color theory, PWM, and LED circuit fundamentals

🏪 About Envistia Mall

Envistia Mall is a US-based electronics retailer specializing in development boards, sensors, modules, LEDs, and components for makers, engineers, keyboard enthusiasts, and educators. We ship from the United States with fast handling times. Product documentation and technical support are available at our dedicated support site.

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3MM 4-Pin Common Anode RGB LED Diffused Nipple Pkg Keyboard Arduino 5 10 25 100

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