Active components
Our official sales partner: Dongke Semiconductor
Dongke is a leading manufacturer of high-frequency and high-efficiency power supply ICs, synchronous rectifiers and innovative solutions for power electronics.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from synchronous rectifiers for efficient energy conversion to customized solutions for industrial applications and consumer electronics.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from synchronous rectifiers for efficient energy conversion to customized solutions for industrial applications and consumer electronics.
Standard and customized electronic components
Electronic components are basic components used in electronic circuits to control, amplify, detect or convert electrical signals and include a variety of elements such as resistors, capacitors, transistors, diodes and integrated circuits.
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- Amplification and control of electrical signals.
- Energy conversion and rectification.
- Versatile in use
- Quality through strong partnership
Standard and customized electronic components
GaN-ICs
GaN ICs are revolutionizing the electronics industry with their high energy efficiency, compact design and versatile applications, especially in sustainable and high-performance technologies.
Synchronous rectifier
Synchronous rectifiers are highly efficient electronic components that minimize energy losses through the use of active MOSFETs and are indispensable in modern power supply systems.
Synchronous rectifier controller
A synchronous rectifier controller optimizes the efficiency of power converters by replacing conventional diodes with controlled MOSFETs, minimizing energy losses and maximizing power efficiency.
All-IN-ONE AC-DC converter
An All-IN-ONE AC-DC converter combines state-of-the-art power electronics in a compact module that reliably converts alternating current (AC) into direct current (DC) - efficient, safe and ideal for demanding industrial and technical applications.
Primary side AC-DC converter
A primary side AC-DC converter is a highly efficient power supply solution that converts alternating current directly into regulated direct current - ideal for compact, energy-efficient applications.
Secondary side AC-DC converter
A secondary-side AC-DC converter ensures efficient, stable and reliable conversion of alternating current to direct current and is ideal for demanding industrial and electronic applications.
Non-isolated AC-DC converter
A non-isolated AC-DC converter is a compact and efficient solution for the direct conversion of alternating current into direct current, ideal for applications with limited space requirements and high energy efficiency.
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Active components
Active electronic components for power electronics and signal processing
Active electronic components are essential components in electronics that make it possible to amplify, control or generate electrical signals. In contrast to passive components, which merely store or consume energy, active components can increase the energy of a signal and thus achieve an amplifying effect.
Typical examples of active components are transistors, diodes and integrated circuits. Transistors are used as switches or amplifiers in numerous applications, while diodes allow current to flow in a specific direction and are therefore used for rectification or signal modulation. Integrated circuits combine several functions on one chip and form the heart of modern electronic devices.
Rotima AG, Electronic Components Switzerland, in cooperation with Dongke Semiconductor, offers a comprehensive range of active components that meet the high demands of today's electronics industry. Our products are characterized by reliability and efficiency and are suitable for a wide range of applications.
Typical examples of active components are transistors, diodes and integrated circuits. Transistors are used as switches or amplifiers in numerous applications, while diodes allow current to flow in a specific direction and are therefore used for rectification or signal modulation. Integrated circuits combine several functions on one chip and form the heart of modern electronic devices.
Rotima AG, Electronic Components Switzerland, in cooperation with Dongke Semiconductor, offers a comprehensive range of active components that meet the high demands of today's electronics industry. Our products are characterized by reliability and efficiency and are suitable for a wide range of applications.
Function and use of active components in electrical engineering
Active components are essential parts of modern electronic circuits. Their structure and functionality are based on the targeted control and amplification of electrical signals. Semiconductor materials such as silicon, which create conductive and non-conductive zones through specific doping, are central to this.
One example is the transistor: it consists of three layers, known as the base, collector and emitter. By controlling the base, the current flow between the collector and emitter can be precisely controlled. Diodes, on the other hand, use a pn junction that allows current to flow in only one direction.
These mechanisms enable active components to perform crucial tasks such as signal amplification, switching and rectification, which are used in numerous electronic devices.
One example is the transistor: it consists of three layers, known as the base, collector and emitter. By controlling the base, the current flow between the collector and emitter can be precisely controlled. Diodes, on the other hand, use a pn junction that allows current to flow in only one direction.
These mechanisms enable active components to perform crucial tasks such as signal amplification, switching and rectification, which are used in numerous electronic devices.
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Further information on electronic components
Electronic components are basic components used in electronic circuits to control, amplify, detect or convert electrical signals and include a variety of elements such as resistors, capacitors, transistors, diodes and integrated circuits.
What are electronic components and what are they used for?
Electronic components are electronic devices or parts that are used in electronic circuits to generate, process, amplify or control electrical signals. They are made of different materials, such as semiconductors, metals or ceramics, and have different functions.
Some commonly used electronic components are
1. resistors: they limit the flow of current in a circuit and are used, for example, to adjust the current or voltage in a circuit.
2. capacitors: They store electrical energy and release it again when required. Capacitors are used in power supplies, for example, to smooth out voltage peaks.
3. transistors: These are semiconductor components that can control the flow of current. Transistors are used in many electronic devices, such as amplifiers, computers or cell phones.
4. diodes: They allow current to flow in one direction only and are used, for example, in rectifiers to convert alternating current into direct current.
5. inductors: They store magnetic energy and are used, for example, in filters or in alternating current circuits.
6. switches: These are electronic components that can open or close the current flow in a circuit.
These are just a few examples of electronic components. There are many other components that are used in different circuits to fulfill specific functions. Electronic components are used in many areas, such as telecommunications, the automotive industry, medical technology, consumer electronics and many more.
Some commonly used electronic components are
1. resistors: they limit the flow of current in a circuit and are used, for example, to adjust the current or voltage in a circuit.
2. capacitors: They store electrical energy and release it again when required. Capacitors are used in power supplies, for example, to smooth out voltage peaks.
3. transistors: These are semiconductor components that can control the flow of current. Transistors are used in many electronic devices, such as amplifiers, computers or cell phones.
4. diodes: They allow current to flow in one direction only and are used, for example, in rectifiers to convert alternating current into direct current.
5. inductors: They store magnetic energy and are used, for example, in filters or in alternating current circuits.
6. switches: These are electronic components that can open or close the current flow in a circuit.
These are just a few examples of electronic components. There are many other components that are used in different circuits to fulfill specific functions. Electronic components are used in many areas, such as telecommunications, the automotive industry, medical technology, consumer electronics and many more.
How does a transistor work and what role does it play in electronic circuits?
A transistor is an electronic component that is able to amplify or switch electrical signals. It consists of three layers of semiconductor material, which are alternately n- and p-doped.
The layers are referred to as the emitter, base and collector. The emitter is heavily n-doped, the base is lightly p-doped and the collector is heavily p-doped. There are two types of transistors: the bipolar transistor (NPN or PNP) and the field-effect transistor (FET).
The function of a transistor is based on the principle of controlling the current flow by means of a small control voltage. In the case of a bipolar transistor, the current flow between the emitter and collector is controlled by the current in the base. If a small current flows into the base, a larger current flow from the emitter to the collector is made possible. This effect is known as the transistor property of current amplification.
In electronic circuits, the transistor plays an important role as an amplifier and switch. As an amplifier, it can amplify weak electrical signals, such as audio signals, so that they can be further processed in a circuit. The transistor works in active mode, in which it functions as an amplifier.
As a switch, a transistor can control the flow of current in a circuit. In so-called saturation mode, the transistor is brought into the conductive state by a control voltage, which enables the flow of current between the emitter and collector. In blocking mode, on the other hand, the transistor is brought into the blocking state by the control voltage, which blocks the flow of current.
The transistor thus enables the realization of complex circuits, such as amplifiers, signal processing circuits, oscillators or digital circuits. It is an essential component in electronics and has made the development of modern electronic devices possible in the first place.
The layers are referred to as the emitter, base and collector. The emitter is heavily n-doped, the base is lightly p-doped and the collector is heavily p-doped. There are two types of transistors: the bipolar transistor (NPN or PNP) and the field-effect transistor (FET).
The function of a transistor is based on the principle of controlling the current flow by means of a small control voltage. In the case of a bipolar transistor, the current flow between the emitter and collector is controlled by the current in the base. If a small current flows into the base, a larger current flow from the emitter to the collector is made possible. This effect is known as the transistor property of current amplification.
In electronic circuits, the transistor plays an important role as an amplifier and switch. As an amplifier, it can amplify weak electrical signals, such as audio signals, so that they can be further processed in a circuit. The transistor works in active mode, in which it functions as an amplifier.
As a switch, a transistor can control the flow of current in a circuit. In so-called saturation mode, the transistor is brought into the conductive state by a control voltage, which enables the flow of current between the emitter and collector. In blocking mode, on the other hand, the transistor is brought into the blocking state by the control voltage, which blocks the flow of current.
The transistor thus enables the realization of complex circuits, such as amplifiers, signal processing circuits, oscillators or digital circuits. It is an essential component in electronics and has made the development of modern electronic devices possible in the first place.
What types of resistors are there and how do they influence the current flow in a circuit?
There are different types of resistors, but the three basic types are:
1. fixed resistors: these are the most common resistors and have a fixed and constant value. They can be measured in ohms and affect the current flow in a circuit by increasing the electrical resistance. The greater the resistance, the lower the current flow.
2. variable resistors: These resistors have an adjustable value and can be adjusted in the circuit as required. A well-known example of a variable resistor is a potentiometer. By changing the resistance value, the current flow in the circuit can be increased or decreased.
3. semiconductor resistors: These resistors are based on semiconductor materials and have a variable resistance that can be influenced by external factors such as temperature or light. A well-known example of a semiconductor resistor is an LDR (Light Dependent Resistor). Depending on the intensity of the incident light, the resistance changes and influences the current flow in the circuit.
As a general rule, the greater the resistance, the lower the current flow in a circuit. Resistors are used to limit or control the current flow to ensure that the components in the circuit function correctly and are not overloaded.
1. fixed resistors: these are the most common resistors and have a fixed and constant value. They can be measured in ohms and affect the current flow in a circuit by increasing the electrical resistance. The greater the resistance, the lower the current flow.
2. variable resistors: These resistors have an adjustable value and can be adjusted in the circuit as required. A well-known example of a variable resistor is a potentiometer. By changing the resistance value, the current flow in the circuit can be increased or decreased.
3. semiconductor resistors: These resistors are based on semiconductor materials and have a variable resistance that can be influenced by external factors such as temperature or light. A well-known example of a semiconductor resistor is an LDR (Light Dependent Resistor). Depending on the intensity of the incident light, the resistance changes and influences the current flow in the circuit.
As a general rule, the greater the resistance, the lower the current flow in a circuit. Resistors are used to limit or control the current flow to ensure that the components in the circuit function correctly and are not overloaded.
How are capacitors used in electronic devices and how do they store electrical charge?
Capacitors are used in electronic devices for various purposes, including
1. storage of electrical energy: capacitors can store electrical charge by creating a potential difference between the two electrodes. When a voltage is applied to the capacitor, positive charges accumulate on one electrode and negative charges accumulate on the other electrode. This charge storage enables the capacitor to store energy that can be released later.
2. decoupling and smoothing of voltages: Capacitors are used to reduce voltage fluctuations and provide a constant voltage for the circuit. They can act as a buffer to minimize unwanted interference and reduce electrical noise.
3. filtering of signals: Capacitors can be used to block or pass certain frequencies. In conjunction with resistors and inductors, they are used in filter circuits to remove or reduce unwanted frequency components.
4. generation of time delays: Capacitors can be used to create time delays in circuits. The charge storage and discharge of the capacitor can be used to create delays in circuits, for example in conjunction with resistors in RC circuits.
The electrical charge is stored in the capacitor by electrons moving from one electrode to another. When a voltage is applied to the capacitor, electrons are drawn from the negatively charged electrode to the positively charged electrode. This process charges the capacitor and creates a potential difference between the electrodes. The stored charge can then be released again when the capacitor is discharged.
1. storage of electrical energy: capacitors can store electrical charge by creating a potential difference between the two electrodes. When a voltage is applied to the capacitor, positive charges accumulate on one electrode and negative charges accumulate on the other electrode. This charge storage enables the capacitor to store energy that can be released later.
2. decoupling and smoothing of voltages: Capacitors are used to reduce voltage fluctuations and provide a constant voltage for the circuit. They can act as a buffer to minimize unwanted interference and reduce electrical noise.
3. filtering of signals: Capacitors can be used to block or pass certain frequencies. In conjunction with resistors and inductors, they are used in filter circuits to remove or reduce unwanted frequency components.
4. generation of time delays: Capacitors can be used to create time delays in circuits. The charge storage and discharge of the capacitor can be used to create delays in circuits, for example in conjunction with resistors in RC circuits.
The electrical charge is stored in the capacitor by electrons moving from one electrode to another. When a voltage is applied to the capacitor, electrons are drawn from the negatively charged electrode to the positively charged electrode. This process charges the capacitor and creates a potential difference between the electrodes. The stored charge can then be released again when the capacitor is discharged.
What is the difference between active and passive components and what examples are there for both?
Active components are electronic components that can supply, amplify or control energy in the electrical system. They require an external energy source in order to function. Examples of active components are transistors, operational amplifiers, integrated circuits (ICs) and thyristors.
Passive components are components that cannot supply or amplify energy. They react to electrical signals by modifying or storing them. Passive components do not require an external energy source in order to function. Examples of passive components are resistors, capacitors, coils and inductors.
To summarize, active components supply or control energy, while passive components modify or store electrical signals.
Passive components are components that cannot supply or amplify energy. They react to electrical signals by modifying or storing them. Passive components do not require an external energy source in order to function. Examples of passive components are resistors, capacitors, coils and inductors.
To summarize, active components supply or control energy, while passive components modify or store electrical signals.
Active components from Rotima GmbH?
Where can I order active components in Switzerland? - You can order high-quality active components in Switzerland from Rotima GmbH - reliably and quickly.
Where can I buy electronics for renewable energies? - We offer specialized electronics for renewable energies that are designed for maximum energy efficiency.
Can I buy electronics for Industry 4.0 from Rotima? - Yes, our range includes modern electronics for Industry 4.0, ideal for smart and connected applications.
Are electronics for industrial applications available in Germany? - Rotima GmbH supplies reliable electronics for industrial applications in Germany with the highest quality standards.
Does Rotima work with electronics component manufacturers in Switzerland? - Yes, we cooperate with leading electronic component manufacturers in Switzerland to offer you high-quality products.
Where can I find cheap electronic components in Germany? - Our customers appreciate the high-quality and affordable electronic components we offer in Germany.
Does Rotima offer energy-efficient circuits? - Our range includes innovative and energy-efficient circuits, ideal for modern applications.
Can I buy TO-220 circuits from Rotima? - Of course - we offer a variety of TO-220 circuits suitable for industrial and renewable applications.
Are there electronics for quasi-resonant mode? - Yes, we have specialized electronics for quasi-resonant mode that are optimized for efficiency and reliability.
Where can I buy electronics for renewable energies? - We offer specialized electronics for renewable energies that are designed for maximum energy efficiency.
Can I buy electronics for Industry 4.0 from Rotima? - Yes, our range includes modern electronics for Industry 4.0, ideal for smart and connected applications.
Are electronics for industrial applications available in Germany? - Rotima GmbH supplies reliable electronics for industrial applications in Germany with the highest quality standards.
Does Rotima work with electronics component manufacturers in Switzerland? - Yes, we cooperate with leading electronic component manufacturers in Switzerland to offer you high-quality products.
Where can I find cheap electronic components in Germany? - Our customers appreciate the high-quality and affordable electronic components we offer in Germany.
Does Rotima offer energy-efficient circuits? - Our range includes innovative and energy-efficient circuits, ideal for modern applications.
Can I buy TO-220 circuits from Rotima? - Of course - we offer a variety of TO-220 circuits suitable for industrial and renewable applications.
Are there electronics for quasi-resonant mode? - Yes, we have specialized electronics for quasi-resonant mode that are optimized for efficiency and reliability.
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