TEFT4300

Series:	*
Packaging:	Bulk
Part Status:	Active
Voltage - Collector Emitter Breakdown (Max):	70V
Current - Collector (Ic) (Max):	50mA
Current - Dark (Id) (Max):	200nA
Wavelength:	925nm
Viewing Angle:	60°
Power - Max:	100mW
Mounting Type:	Through Hole
Orientation:	Top View
Operating Temperature:	-40°C ~ 100°C (TA)
Package / Case:	Radial, 3mm Dia (T-1)

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Optical Sensors - Phototransistors

Transistor phototransistors or TEFT4300 are semiconductor optical sensors with a high sensitivity to light. A certain amount of energy, usually in the form of heat, is needed to activate them. When triggered, they produce a current that can be used to power an electrical system or provide useful information about the object or environment in which the sensor is placed.Transistor phototransistors are very versatile and can be used in a wide range of applications including consumer electronics, industrial automation, home automation, and automotive systems. TEFT4300s are used for tasks such as night vision, automatically dimming street lamps, dimming automotive headlights, and nighttime security monitoring.The design of TEFT4300s is such that the light-sensitive material is sealed in a plastic or metal housing, with electrodes positioned on the inside of the housing and exposed to light. When light is applied to the transistor phototransistor, electrons are excited by the light and the resulting current is sent to the electrodes. This current is then used to power an electrical system or send useful information about the environment to a control unit.The most common type of transistor phototransistor is the NPN bipolar phototransistor. These transistors have three electrodes, a collector, an emitter, and a base. The base is the control electrode which is connected to a voltage that turns the transistor on and directs the current to the collector and emitter. The emitter is the output side of the transistor and is where the current flows out to the appliance or control unit. The collector is the input side of the transistor and is where the current enters the transistor. The amount of current entering the transistor is proportional to the amount of light that is applied to the phototransistor.One of the major advantages of TEFT4300s is their low power requirement. These transistors use less than 5 milliwatts of power when activated by light. They also do not require the use of expensive optical filters or lenses which makes them an ideal solution for applications where cost and power efficiency are a priority.Another advantage of transistor phototransistors is their durability and long-term operability, making them suitable for outdoor applications. The plastic or metal housing of the transistor protects it from environmental conditions such as dust, rain and snow, and they are resistant to vibration and shock.The TEFT4300 is especially suitable for applications in expanded dynamic range (EDR) image sensing. This is because these transistors can accurately detect a range of light intensities at any given moment. This makes it easier to capture images even in low light environments.In summary, the TEFT4300 is a versatile phototransistor that is suitable for a wide range of applications. They are capable of providing accurate and reliable results under varying light conditions, and are extremely efficient in terms of power consumption. Their ability to operate well under environmental conditions such as rain and snow make them an ideal choice for many applications.

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