5mm Red LED Indicator

This 5mm Red LED Indicator is a popular discrete optoelectronic component used to add clear visual feedback to electronic circuits. The round T-1 3/4 package has a diffused red lens, making the light easy to view from a wider angle instead of producing a narrow spotlight. It is suitable for PCB mounting, breadboard prototyping, education kits, repair work and front-panel indication in low-voltage DC electronics. The LED works by emitting red light when forward biased. Typical red LED operation is around 1.9V to 2.3V forward voltage at 20mA, so it must always be used with a suitable current-limiting resistor or LED driver. For microcontroller projects, the LED can be driven from a GPIO pin through a resistor for status, alarm, power, logic-level or process indication. Its 627nm red wavelength and 20–40mcd luminous intensity make it useful for indoor indicators where a simple, reliable and low-power visible signal is required. This component is commonly used in Arduino LED blink circuits, power-on indicators, battery low indicators, DIY alarm systems, robotics panels, learning electronics labs, instrument panels and custom control boards. The 80° viewing angle helps users see the indicator from different positions, while the through-hole leads make soldering easy for students, hobbyists and technicians. Package includes 1 piece of 5mm red diffused through-hole LED indicator. Pin note: the longer lead is normally the anode (+) and the shorter lead/flat side is normally the cathode (-). Always confirm polarity before soldering and use an external resistor calculated for your supply voltage to avoid damaging the LED.