SFH 309-5 Phototransistor; 3mm; λp max: 860nm; 35V; 12°; Lens: transparent

The SFH 309-5 is a high-sensitivity NPN silicon phototransistor designed for detecting infrared radiation. Encased in a compact 3mm package with a transparent lens, this device is optimized for applications requiring precise and efficient light detection. With a peak sensitivity wavelength (λp max) of 860nm, it excels in capturing near-infrared light emitted by LEDs and other IR sources. The SFH 309-5 operates at a maximum collector-emitter voltage of 35V and features a narrow viewing angle of 12°, allowing for focused and accurate detection. Its transparent lens enhances light transmission, maximizing its sensitivity to incident radiation.

The SFH 309-5 phototransistor operates on the principle of converting light energy into electrical current. When infrared light strikes the phototransistor's active area, it generates electron-hole pairs, which are then amplified by the transistor's internal structure. This results in a collector current that is proportional to the intensity of the incident light. The device's high sensitivity ensures that even weak infrared signals can be detected, making it suitable for a wide range of applications. Its fast response time allows for rapid detection of changes in light intensity, enabling real-time monitoring and control.

The SFH 309-5 is designed for easy integration into various electronic circuits. Its compact 3mm package allows for dense placement on circuit boards, saving valuable space. The transparent lens provides a clear optical path for infrared light, maximizing the device's sensitivity. The phototransistor's electrical characteristics are well-defined, making it easy to design and implement control circuits. Its robust construction ensures reliable operation in diverse environmental conditions. The device is also RoHS compliant, ensuring that it meets environmental standards.

Typical applications for the SFH 309-5 phototransistor include light barriers, remote control systems, object detection, and optical sensors. It can be used in security systems to detect intruders, in industrial automation to monitor production lines, and in consumer electronics to control devices remotely. Its narrow viewing angle makes it ideal for applications requiring precise alignment and focused detection. The phototransistor's high sensitivity and fast response time make it a versatile component for a wide range of light-sensing applications.

In summary, the SFH 309-5 phototransistor is a highly sensitive and reliable device for detecting infrared radiation. Its compact size, transparent lens, and narrow viewing angle make it an excellent choice for applications requiring precise and efficient light detection. With its peak sensitivity at 860nm and a maximum voltage of 35V, it is well-suited for a wide range of applications, from remote control systems to industrial automation. Enhance your light-sensing capabilities with the SFH 309-5 phototransistor and experience the power of precise infrared detection. Order yours today and take your projects to the next level!