The PT57-21B/TR8 is an infrared (IR) emitting diode manufactured by Everlight Electronics Co. Ltd. This diode emits infrared light, which is invisible to the human eye, and is commonly used in a wide range of applications including remote controls, light barriers, and proximity sensors.

Applications

• Remote Controls: Used as the IR transmitter in remote controls for televisions, DVD players, and other electronic devices.
• Light Barriers: Employed in light barrier systems for object detection and security applications.
• Proximity Sensors: Integrated into proximity sensors for detecting the presence of objects without physical contact.
• Optical Communication: Used for short-range optical communication in various electronic systems.

Features

• High Output Power: Provides a strong IR signal for reliable operation.
• Narrow Beam Angle: Focuses the IR light into a narrow beam for efficient transmission.
• Fast Switching Speed: Enables rapid transmission of data in communication applications.
• Compact Package: Allows for easy integration into space-constrained designs.
• Long Lifespan: Ensures reliable operation over an extended period.

Benefits

• Reliable Signal Transmission: Provides a strong and consistent IR signal for accurate communication.
• Efficient Object Detection: Enables reliable object detection in light barrier and proximity sensor applications.
• Versatile Application: Suitable for a wide range of applications due to its performance characteristics.
• Easy Integration: Designed for straightforward integration into electronic circuits.

The PT57-21B/TR8 IR emitting diode typically comes in a standard through-hole or surface-mount package. Key specifications, including the peak wavelength, forward voltage, forward current, and radiant intensity, can be found in the manufacturer's datasheet. Proper selection of the drive current is essential to ensure optimal performance and prevent damage to the diode.