We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a C1815 Transistor?

By B. Leslie Baird
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

The C1815 transistor is a general-purpose transistor and can also used as an audio frequency amplifier. The majority of transistors are coded for easy identification although these designations can vary by manufacturer. One or two letters are usually followed by a series of numbers, and then possibly more numbers. Therefore, a C1815 transistor may also be identified as a 2SC1815 transistor. The letter C in this series identifies the transistor for general-purpose use.

Made from semiconductor materials, a transistor has three leads, or terminals, and sometimes more. These are used to switch electronic signals, or pulses, or to amplify the signals. Further information can also be obtained just from the part number. The '2S' portion of the number indicates that the C1815 transistor is good for high-frequency applications and is in Negative-Positive-Negative (NPN) configuration. The other three-lead transistor configuration is Positive-Negative-Positive (PNP).

The first negative end of the transistor is connected to the negative side of a circuit, and controls the flow of electrons to the positive region in the middle. The other negative end of the transistor controls the electrons leaving the positive, middle portion. The semiconductor material that is used to manufacture the transistor determines the NPN or PNP configuration.

Leads on a transistor are identified as the emitter, base, and collector. The emitter is the output for the supply. The base acts a control gate for a larger electrical input at the collector, which — as its name implies — collects energy. For example, when a C1815 transistor is used in a video application, the emitter sends out the video output signal. This is processed through the base, which could be a low video signal, and powered by the collector, which may be a 5-volt energy supply.

By varying the electrical current at the base of a transistor, the amount of power flowing from the collector to the emitter can be controlled. For instance, in digital circuits, a transistor is on when it receives 5-volts, and off when it receives less than that amount. General ratings for a C1815 transistor include a power dissipation of 0.4 watts at an ambient temperature of 77° Fahrenheit (25° Celsius). The transistor is capable of a collector current of 0.15 amps. The collector-to-base voltage can be up to 60-volts.

The term 'transistor' came from the combination of the words, transfer and resistor. A field-effect transistor (FET) was originally designed as a replacement for a triode — part of older vacuum tube technology. The use of transistors helped the electronics industry change rapidly, and improvements in technology are allowing smaller components to be used to manufacture smaller devices.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.