QSD122A4R0

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Collector Emitter Breakdown (Max):	30V
Current - Collector (Ic) (Max):	1mA
Current - Dark (Id) (Max):	100nA
Wavelength:	880nm
Viewing Angle:	24°
Power - Max:	100mW
Mounting Type:	Through Hole
Orientation:	Top View
Operating Temperature:	--
Package / Case:	Radial, 5mm Dia (T 1 3/4)

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Optical Sensors - Phototransistors

The QSD122A4R0 is an optical sensor that belongs to the phototransistor family. The device is designed to sense low-level light in electronics and machinery designs. It is composed of an integrated two-terminal phototransistor and a built-in noise immunity filter that offers a reliable and robust sensing solution.

Operating Principle

The QSD122A4R0 utilizes an integrated two-terminal photosensitive sensor which works similarly to a regular transistor. When light is detected, it is converted into a current which then passes through the device, activating the transistor. The transistor then produces a voltage output that can be used to trigger different operations in the sensing system.

Application Fields

The QSD122A4R0 is widely used in optical sensing systems. Examples of applications include low-light level detection, machine operations, occupancy sensing, light intensity measurement, and more. The device has excellent noise immunity and can accurately detect low-intensity light levels, making it suitable for a wide array of sensing applications.In motorized vehicles, the QSD122A4R0 can be used to detect the light level inside a cabin or to check if the headlights are switched on. It can also be used for monitoring the movements of objects or people in a monitored area. The device can be used as part of a burglar alarm system for detecting the presence of an intruder.In security systems, the device can be used to detect small changes in light levels, making it ideal for detecting movement through doorways or when someone passes in front of a security camera. The device can be used for monitoring residential or commercial properties as it is able to detect low levels of incoming light.In manufacturing processes, the QSD122A4R0 can be used for detecting low light levels inside a factory or on a factory floor or for monitoring the light level of a material that is being processed. It can also be used for detecting light emitted by objects in a production line.

Features and Benefits

The QSD122A4R0 is an inexpensive optical sensor and is highly reliable in detecting light levels. The chip features a built-in noise immunity filter which ensures that the device can accurately detect low-intensity light signals. In addition, the device is highly sensitive and can detect very low light levels, making it suitable for a variety of tasks.The device is also easy to integrate into various sensing systems due to its two-terminal design. It is also small in size, making it convenient to deploy in a variety of locations. Furthermore, it can be installed in a variety of environments, including indoors and outdoors.Overall, the QSD122A4R0 is an excellent choice for low-light sensing applications. It is an affordable device that offers reliable and accurate sensing results and is easy to install and deploy. It is suitable for a variety of sensing applications, including occupancy sensing, automatic dimming systems, and security systems.

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