BSR18B

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

The BSR18B transistor is a stand-alone single bipolar junction transistor (BJT) that is used for a variety of applications. It is an extremely common component, and one of the most popularly used transistors.

The BSR18B is a unipolar NPN transistor, meaning its base-emitter voltage is normally positive. The pin connections for the BSR18B are for lead one (1), the emitter is connected; lead two (2), the base is connected; and lead three (3), the collector is connected.

The primary application of the BSR18B is as a general-purpose switched transistor, meaning it usually is used with other transistors to open and close circuits. It is also ideal for use in low-frequency amplification applications and as a switching device in small power switches.

The BSR18B can be replaced with several other comparable transistor types, such as the BC182A, BC607, BC757, and BC807, depending on the application requirements. Though these transistors are not exact in their base-emitter voltages, they all share the same basic specifications.

For best performance, it is important to understand the working principle behind the BSR18B. A BJT is a three-terminal device that operates on the principle of PN junction. In this type of junction, when the base (middle terminal) is supplied with the correct amount of current, the turn-on voltage of the emitter-base junction is reached and current is then allowed to flow through the collector-emitter terminals. When the base current is cut off, the voltage across the collector-base junction is reversed, and the transistor is switched off. This is known as the biasing model.

This biasing model tends to be a bit more complicated with the BSR18B, and other single BJTs, than those with other transistor types, and some design considerations must be taken into account for best operation. Depending on the circuit, BJT types and the number of auxiliary transistors needed to control the device may vary. The gain of the transistor must also be taken into account when designing a circuit, as it will play a vital role in the performance of the device.

The BSR18B also has its place in digital circuits. When connected in a circuit, it can be used to toggle one of two logical states, such as "on" or "off", so it can be used in the same way as a digital switch. Additionally, BJTs can be used to create logic gates and other digital functions when combined with other components.

In addition to the functionality of the BSR18B, the transistor is also able to withstand temperatures up to 150°C, has a very low noise figure, and can operate from as low a voltage as 50mV. These have been noted as major benefits for the device when compared to other transistors.

All in all, the BSR18B, like other single BJTs, has a wide range of applications and is an invaluable source for both digital and analog circuits. The principles associated with correctly using a BSR18B should be well understood to ensure proper functionality and performance of a circuit.

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