SD5491-003

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 detect the presence or absence of light, and phototransistors are one type of optical sensor that can detect even low levels of light. The SD5491-003 is an optically activated phototransistor manufactured by Shenzhen SunLike. This phototransistor is used in a variety of applications, including determining presence or absence of light, dimming indicators on electronic devices, or light control.

SD5491-003 has two pins: anode and cathode. The anode, is the positive end, is connected to the supply voltage, while the cathode is the negative end. This phototransistor is activated by infrared light and has a reverse voltage standing current from 0.2mA to 2.4mA. It is designed to operate at a supply voltage of 5.0V and the forward voltage of the LED is 250mV. This phototransistor can operate up to a frequency of 100kHz and is capable of switching up to 400mA.

The working principle of the SD5491-003 is relatively simple. It utilizes infrared light that is detected by the phototransistor, allowing it to switch on and off. When the phototransistor detects the presence of infrared light, it switches on and allows a small current to flow. This small current is then used to power an electronic device or to power an indicator light. When the infrared light is not present, the phototransistor remains off and does not allow any current to flow.

The SD5491-003 phototransistor can be used in a variety of applications. It is often used in light dimming or in remote controls, such as on television or appliance remotes. It can also be used in security systems, as it can detect the presence or absence of light. Additionally, this phototransistor can be used in automotive applications, such as rear lights or brake lights, as well as in lighting control systems or occupancy sensors.

Due to its small size and low cost, the SD5491-003 phototransistor is a popular and versatile choice for applications that require accurate and reliable detection of light. The phototransistor is easy to install and use, and its unique design allows it to switch on and off quickly and efficiently, making it an ideal choice for a wide range of applications.

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