Guidelines on Choosing a Transistor Replacement

Replacement transistors are available in plenty. However, not all of them would be suitable for all types of applications. Others might not be able to play the exact role you want them to play. If you are uncertain regarding how to choose the right device, it is important not to employ a trial and error approach when choosing them. It is also important not to rely entirely on the advice of a dealer. You need to protect yourself from dealers that are only interested in making a sale. How do you choose the right transistor?

You should factor in the type of MOSFET you have. Is your application analog, low noise, low power, or switching? Assuming that any gadget would work well with any application would be a bad decision. It is true that finding a replacement gadget that matches the exact intended purpose can be challenging. However, you can easily find a device that comes with the features that you need. The right transistor for your application guarantees peak performance. You should also factor in physical requirements. Your choice transistor has to fit physically.

Take note of continuous current rating before making a decision. What load can the device handle? It is integral to choose among transistors that can handle a stress allowance of at least 70%. It is integral to consider ambient temperature when making a decision on continuous current rating. If you would be exposing the circuit to extreme temperatures, your choice transistor must be able to handle such temperature. It pays to ensure that it comes with an acceptable stress margin as far as ambient temperature is concerned.

You should also consider the type of TRANSISTORS material the manufacturer has used. Such types of items come in silicon and germanium semiconductor materials. Since both types of materials perform differently as far as base-emitter voltage is concerned. For instance, the base-emitter voltage for germanium ranges between 0.2-0.3 volts. The base-emitter voltage for silicon semiconductor materials is approximately 0.6 volts. In most cases, circuits are designed in respect to a specific voltage drop.

Take note of cost before making a decision. You ought to factor in your budget when choosing your gadget. While high-quality transistors do not come cheap, expensive ones are not necessarily high-quality. Whatever you do, do not choose a gadget based on cost only. It pays to choose among affordable gadgets that can do exactly what you want them to do. Read this article about transistors:  https://en.wikipedia.org/wiki/Transistor.