SD1440-003

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Optical sensors, such as phototransistors, are used to measure the intensity of light and convert it into an electrical signal. The SD1440-003 is an NPN phototransistor designed specifically for low-light applications, such as darkroom photography and light sensing. It is able to detect light from infrared to visible, with extremely low thermal drift.

Application Field

The SD1440-003 phototransistor is ideal for applications in which it is necessary to detect low light levels. The phototransistor is particularly useful in medical systems where infrared light is used to identify different substances within the human body. It is very useful for digital photography, as it is able to accurately detect low light levels in darkrooms. Additionally, it is an ideal choice in environments where light must be detected over long distances and under difficult lighting conditions, such as in fire detection systems or security systems.

Working Principle

The working principle of a phototransistor is similar to that of a standard transistor. It requires a base current to activate the device, and the intensity of this current is directly proportional to the intensity of the light it detects. The device consists of an NPN type photo transistor in which the collector has a good electrical insulation. When light strikes the base junction, electrons are freed and a current is generated. This current passes through the collector and is then measured as an output voltage.

The SD1440-003 phototransistor is designed to respond to a lower level of light than other phototransistor models. This is due to its careful design and construction, which includes specially designed light-sensitive surfaces. The device is also able to detect a wide range of light levels, from infrared to visible light, while maintaining extremely low thermal drift.

Conclusion

The SD1440-003 phototransistor is a device designed for applications which require the detection of low light levels. It is capable of detecting light from infrared to visible, with extremely low thermal drift. It is ideal for digital photography, medical systems, fire detection systems, security systems, and other applications which require the accurate detection of light over long distances or under difficult lighting conditions.

The specific data is subject to PDF, and the above content is for reference