The SFH309-4 is a silicon PIN photodiode designed for infrared remote control and light barrier applications. Manufactured by OSRAM Opto Semiconductors, it is characterized by its high sensitivity to infrared light and a narrow viewing angle. This photodiode is housed in a standard through-hole package, making it suitable for a variety of applications where precise light detection is required. The SFH309-4 provides reliable and efficient detection of infrared signals, particularly in remote control and security systems. The primary difference between the SFH309-3 and SFH309-4 lies in their sensitivity range. This distinction is important when selecting the right component for a specific application.

Applications:

• Remote control systems: Used in televisions, DVD players, and other electronic devices to detect infrared remote control signals.
• Light barriers: Implemented in security systems and automated production lines to detect interruptions in the light beam.
• Proximity sensors: Employed in automatic doors and other devices to detect the presence of objects.
• Optical switches: Used in various electronic devices to switch circuits based on light detection.
• Industrial automation: Utilized for position sensing and object detection in manufacturing processes.

Features:

• High sensitivity to infrared light: Provides a strong electrical signal even with low-intensity infrared signals.
• Narrow viewing angle: Limits the detection range to a specific area, reducing interference from ambient light.
• Through-hole package: Standard package allows for easy mounting on printed circuit boards.
• Fast switching speed: Enables rapid response to changes in infrared light intensity.
• Robust design: Ensures reliable performance in a wide range of operating conditions.

Benefits:

• Improved remote control performance: High sensitivity ensures reliable detection of remote control signals.
• Enhanced security system reliability: Narrow viewing angle reduces the chance of false alarms in light barrier applications.
• Easy integration: Through-hole package allows for simple installation and connection in existing circuits.
• Consistent performance: Robust design ensures reliable operation in diverse environments.
• Cost-effective: Provides excellent performance at a competitive price.

Additional Details:

The SFH309-4 is optimized for infrared wavelengths around 950 nm, although its sensitivity might differ slightly from the SFH309-3. It has a reverse voltage of typically 30V. The operating temperature range is generally from -40°C to +85°C. Detailed technical specifications, including spectral response curves and electrical characteristics, can be found in the OSRAM datasheet. Proper alignment and shielding from ambient light can further improve performance. The component is RoHS compliant. Refer to the specific datasheet for SFH309-4 as sensitivity parameters may differ from the SFH309-3.