BSR17A Discrete Semiconductor Products

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The BS17A is a double-transistor, commonly referred to as a PNP-NPN, dual-gate component. The component is used in many integrated and analog circuits, finding its most common use as a switch, providing for switching at and between larger voltage media. This makes them especially beneficial in high-frequency situations which require minimum amount of energy lost.

Working Principle and Structure

The BS17A provides two distinct transistors, with the PNP-NPN combination, connected via a single lead. The functioning of this component consists of the use of positive versus negative charges. The positive voltage activates one of the two transistors, while the negative voltage turns off this first transistor and activates the second one. This feature allows for the transfer of voltage, providing for the switching required for the device.

Specifications

The BS17A double-transistor varies in specifications depending upon the intended application. Generally speaking, it has a voltage ranging between 25 to 310 volts, and a current rating of up to 300 milliamperes. This device also provides for a response time, from 80 to 130 nanoseconds depending upon the corresponding gate capacitance. Furthermore, the device is available in various application-specific protective envelopes.

Application Field

The BS17A double-transistor has a variety of application fields. Due to its ability to control large amounts of voltage and provide precise transference between levels, it is often used in motors and robotics. Additionally, it can be found in high-frequency circuits such as PIR sensors, RFID tags and automotive immobilisers. The easy-switching feature is also utilized in communication systems, which require fast switching, low-energy consumption, and precise current control.

Advantages and Disadvantages

This double-transistor allows for a wide range of advantages. The primary benefits are its low-energy consumption and its ability to switch quickly between voltage levels. This makes it an ideal choice for high-frequency applications. The small physical size also makes it easy to incorporate into circuits and designs, which makes it a particularly attractive choice for many projects.

The main disadvantage of the BS17A is its limited voltage and current capabilities. This can limit the application of the device in certain situations, as its voltage handling capacity is not suitable for high-powered circuits. Additionally, its small size can also be a disadvantage if the additional protection of a larger enclosure is required.

Conclusion

The BS17A double-transistor is a powerful and effective switching component, used in a variety of applications within the fields of robotics, communications, and motor control. Its low-energy consumption, fast switching times and precise control make it an ideal choice for many projects. The main disadvantage is its relatively limited ability to handle large voltages and currents, but with proper use, the BS17A can be an extremely beneficial addition to any circuit.

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