BD543C-S

Transistors - Bipolar (BJT) - Single

The BD543C-S is a single bipolar junction transistor (BJT) commonly used for general purpose amplifying and switching applications. This component is mainly used for hearing aids and other low-power, high-gain applications due to its small size and low-power operation. It is also used in many automotive applications such as ignition systems and electronic relays.

Overview of the BD543C-S

The BD543C-S is a discrete transistor component, as opposed to integrated circuit or power transistor packages. It is a small-signal, NPN junction transistor and has a collector connected to the base, an emitter connected to the collector, and a collector-base junction connected to the base. It is the two-terminal equivalent of an N-channel MOSFET (Metal Oxide Semiconductor Field-Effect Transistor). It has an operating voltage of 40V and a collector current rating of 600mA.

How the BD543C-S Works

The BD543C-S works by allowing electric current to flow from its collector to its base and allowing voltage to flow from its collector to its emitter. This is made possible by the doping of the transistor\'s four regions: base, emitter, collector, and substrate. The base is the control point and dictates the amount of current that is allowed to pass through the other circuits. The emitter and collector together allow electricity to flow through the transistor in one direction when the transistor is in the active state. The substrate provides the physical and electrical connection between the other three regions, allowing the entire system to function.

Application Fields of the BD543C-S

The BD543C-S can be used in many applications due to its low voltage and low power operation. Some of these applications include:

• Hearing aids
• Ignition systems
• Relay control
• High-gain amplifying circuits
• General switching and latching applications

Conclusion

The BD543C-S is a single bipolar junction transistor that can be used in a wide range of applications, from hearing aids and high-gain amplifiers to relays and general switching. It is a low power and low voltage device, which makes it perfect for these types of applications.