Generic 3mm Red LED – 2V Forward Voltage (Single Unit)
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Achieve clear visual indication with this standard 3mm Red LED. Perfect for circuit status, educational projects, and hobbyist electronics. Designed for straightforward integration and dependable long-term operation.
Reliable 3mm red LED offers foundational illumination, ideal for rapid prototyping and essential indicator applications.
Provides unmistakable red light for status indication, making project debugging incredibly simple.
Consumes minimal power, perfect for battery-operated devices and long-term embedded applications.
Simple two-pin design ensures quick and hassle-free setup into any basic electronic circuit.
The Engineering Behind 3mm Red LED
The 3mm Red Light Emitting Diode (LED) is a foundational semiconductor component that converts electrical energy into light through electroluminescence. Its core architecture involves a p-n junction made from specific semiconductor materials, typically Gallium Arsenide Phosphide (GaAsP) for red light, encapsulated in an epoxy lens. When forward-biased, electrons from the n-side recombine with holes from the p-side, releasing photons at a specific wavelength, in this case, red light.
This component is celebrated for its compact form factor, low power consumption, and remarkable longevity compared to traditional incandescent bulbs. Its robust epoxy encapsulation provides protection against mechanical stress and environmental factors, making it a staple in both educational kits and professional indicator applications where reliability is paramount for system status communication.
Precise Wavelength Emission
The 3mm Red LED is engineered to emit light at a dominant wavelength typically around 620-630 nanometers. This precise wavelength ensures a consistent, easily recognizable red hue, critical for applications requiring clear visual alerts, status indicators, or simple signal transmission. Its narrow spectral output enhances visibility in various ambient light conditions.
Optimized Forward Voltage Characteristics
Operating with a typical forward voltage (Vf) of 1.8V to 2.2V and a forward current (If) of 10mA to 20mA, this LED integrates seamlessly into 3.3V and 5V logic systems using a simple current-limiting resistor. This optimized electrical characteristic ensures efficient power utilization, minimizes heat generation, and simplifies circuit design for hobbyists and engineers alike, promoting stable long-term performance.
Optimized for Performance & Integration
- Diode Type: Light Emitting Diode (LED)
- Color Emission: Red
- Diameter: 3mm
- Dominant Wavelength: 620-630nm
- Forward Voltage (Typical): 1.8V – 2.2V DC
- Forward Current (Typical): 10mA – 20mA
- Viewing Angle: ~20-30 degrees
- Luminous Intensity: ~2000-5000 mcd (varies by manufacturer)
Features & Benefits
- Compact 3mm Diameter: Ideal for tight spaces and intricate PCB designs in various electronic projects.
- Vibrant Red Emission: Provides clear, easily discernible visual indicators for status and alerts.
- Low Power Consumption: Extends battery life and reduces energy overhead in embedded systems.
- Broad Compatibility: Integrates effortlessly with common microcontroller platforms like Arduino and Raspberry Pi.
- Durable Epoxy Encapsulation: Offers robust protection against physical damage and environmental factors.
- Long Operating Lifespan: Ensures reliable, maintenance-free performance over extended periods.
Pro-Grade Advantages
- Standardized footprint allows for universal replacement and consistent project builds.
- Extremely cost-effective for mass production and educational prototyping needs.
- High visibility in typical indoor and moderate outdoor lighting conditions.
- Exceptional longevity compared to traditional incandescent indicator lights.
Technical Considerations
- Requires external current-limiting resistor, not integrated, increasing component count.
- Limited luminous intensity for highly bright or direct sunlight applications.
What is the typical forward voltage and current for a 3mm Red LED?
The typical forward voltage (Vf) ranges from 1.8V to 2.2V, and the forward current (If) is usually 10mA to 20mA for optimal brightness.
How do I connect a 3mm Red LED to an Arduino?
Connect the longer leg (anode) to a digital pin (via a current-limiting resistor) and the shorter leg (cathode) to GND. A 220-ohm resistor is commonly used with 5V supplies.
What resistor value should I use with a 5V supply?
Assuming a 2V Vf and 20mA If, use R = (5V – 2V) / 0.02A = 150 ohms. A common value like 220 ohms also works safely.
What is the luminous intensity of a typical 3mm Red LED?
Luminous intensity can vary significantly by manufacturer but commonly ranges from 2000 mcd to 5000 mcd, providing good visibility for indicator tasks.
Can this LED be used outdoors?
While durable, its luminous intensity might be insufficient for direct sunlight. It is best suited for indoor applications or shaded outdoor environments.
| Specification | Value |
|---|---|
| Diode Type | Light Emitting Diode |
| Emitted Color | Red |
| Lens Type | Diffused |
| Package Diameter | 3mm |
| Dominant Wavelength | 620nm – 630nm |
| Reverse Voltage (Max) | 5V |
| Operating Temperature | -25°C to +80°C |
| Pin Pitch | 2.54mm |
| Lead Length | ~25mm (approx) |
Additional information
| Technology | LED |
|---|---|
| Operating Voltage | 1.8V – 2.2V (Forward) |
| Max Current | 20mA (Forward) |
| Value | Red |
| Package | Through-Hole |
| Sensor Type | Optical (Light Emitter) |
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