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- About Kar-Tech
- Find your HBC radio control for industrial applications!
- RUGGEDCOM WIN base stations
- New Japan Radio Co., Ltd.
- Radio Frequency (RF) Components & Subsystems
- OUR EXPERIENCE IN A NEW DIMENSION
- Sairem documentation for industrial microwave and radio frequency components
- MANUFACTURERS BY PRODUCT CATEGORY
- RF Equipment Parts
About Kar-TechVIDEO ON THE TOPIC: A simple guide to electronic components.
Noise measures. Surge and ESD electro-static discharge refer to transient high voltage, and possibly a very dangerous noise under certain conditions. A Surge and ESD may cause malfunctions to the equipment or circuit when the level reaches a certain degree, and the level often experiences high voltage far exceeding the permissible range. In such cases, the affected component or equipment is broken in an instant. The diagram is a mapped image of surge voltage and its width. Surge and ESD are described below.
Lightning as natural phenomenon contains a very large amount of energy. A lightning surge can be grouped into direct lightning surges and induced lightning surges. Protection against a direct lightning surge is difficult, but protection against induced lightning is possible.
Induced lightning is a high voltage surge induced by a relatively long wire such as power line or communication cable that is nearby a lightning strike. It is presumed that the generation mechanism is an electric charge induced in a cable that is in proximity of an electric field discharged by a lightning strike, or a magnetic field generated by a lightning strike current generates an inductive electromotive force in the cable. As shown in the previous diagram, an induced lightning surge has a large amount of energy that can easily destroy electric or electronic components even though it is not as destructive as a direct lightning surge, thus requiring prevention measures.
This high voltage surge may cause a malfunction of an electronic circuit, and in some cases, lead to the destruction of a component. Load dump is a surge generated by cutting the battery connection off on an automobile. The most severe instance occurs when the battery connection is lost while the automotive engine is in operation and the alternator battery charging generator is charging the battery.
The magnitude of surge voltage is determined by the alternator rotation speed and magnetic field excitation strength at the moment of cut off.
Surge voltage exceeds V in some cases for a duration of several hundred milliseconds. Because this surge has such a large amount of energy, it can easily destroy an electronic component. Permissible load dump is specified by auto-makers and automotive equipment makers in the form of maximum voltage, line impedance, and duration time. ESD electrostatic discharge is a phenomenon where a charge is stored in a small floating capacity on a human body or substance then discharged to a nearby object, and is classified as one type of surge.
ESD duration time is short with little energy, but because it generates transient high voltage as high as several kilo volts, it can generate a malfunction of electronic circuits or damages electronic components.
For the evaluation and testing method of an ESD, a human model or machine model is generally used. And protection is possible by utilizing the components based on these assumptions. For the purpose of protection against a surge and ESD, use of a varistor or zener diode is the general choice. These components have a high electrical resistance when the terminal voltage is low, but the resistance suddenly becomes low when the voltage gets higher. By using this tendency, the component prevents a surge from entering the circuit by bypassing the current when a high voltage surge occurs in an electric circuit.
The diagram to the right illustrates how to protect a power supply circuit from induced lightning surge by using a varistor. Panasonic was the first manufacturer in the world that commercialized ceramic varistors with a superior ceramic material design and process technology backed by many achievements in device design and production engineering. This product provides excellent voltage non-linearity characteristics in parallel with those of zener diodes along with large current resistance characteristics not found in other products.
Chip varistor is a chip-shaped laminated varistor, and the basic structure is a laminated ceramic component similar to a laminated ceramic capacitor MLCC. Basic structure. Chip varistors are used in a wide variety of electronic equipment as general purpose ESD protection components. The minimized static capacitance is suited for using in a high-speed signal line. Basic Structure. Compared with the chip varistors described above, an ESD suppressor has a very small electrostatic capacitance and is a major difference in characteristics.
The voltage-current characteristics can accommodate an ESD in the range of several kilo-volts. A very small electrostatic capacitance 0. Before replacement, we should know what a zener diode is first. The voltage and current characteristics of a zener diode are shown below. A single zener diode provides voltage restriction effect only at the negative voltage side, but by using two diodes in an opposite series connection, bidirectional voltage restriction effect can be obtained, as is the case in a varistor.
For an advantage over a varistor, effective protection voltage can be set at a low level of several volts. However, for disadvantage, they require a large shape and more weight as well as a larger mounting surface area than a varistor. Although a bidirectional zener diode is available by connecting two diodes in a single package, it is still larger than the size of a varistor.
As described, surge protection by using zener diodes requires 3 components, but a single varistor can serve the same function, thereby achieving a substantial reduction of size, weight and mounting surface.
In the case of ESD prevention, replacing 0. The graph shown below is a comparison of resistance to ESD and surge current between 0. The graph shows that resistance to ESD and surge current improves by replacement with a chip varistor. The difference and features of each component are summarized in the table below. Application coverage for each ESD prevention component is summarized in the diagram below.
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Voltage current characteristics of a zener diode single unit Voltage current characteristics of zener diodes 2 units connected. Zener diode 0. Before using our products. What's new Press release Product news. Contact us. In principle, voltage value at both ends of a component when DC 1 mA is applied. This is the guideline value of voltage when varistor operates. Maximum value of the commercial frequency sinusoidal wave voltage effective value allowing continuous application, or maximum value of DC voltage.
When a surge voltage is applied, the voltage value restricted by the varistor is called restricted voltage, and an individual catalog lists the maximum restricted voltage as maximum value. This value indicates the level of surge current resisted by the varistor.
The company started treading this path in and has been working in this direction ever since, in order to provide its customers with maximum safety and reliability in the most complex or heaviest-duty operations. The experience gathered over years of cooperation with leading machine manufacturers has allowed IMET to understand and gain a precious insight into the various demands of the relevant markets, both in Italy and abroad, and hence to design and build customised and user-friendly radio remote controls. Safety is a key element, which determines the type of radio remote control. A radio remote control qualifies as safe only if in case of failure it does not give rise to hazardous situations.
Find your HBC radio control for industrial applications!
Our highly-integrated, single-chip solutions provide reduced board space and easy implementation for multi-band audio receivers and consumer electronic applications. If you have any issues downloading, please contact sales support or product technical support. Audio and Radio Solutions Improve performance and reliability with scalable, industry-leading broadcast audio solutions. Unmatched Scalability. Lowest Cost.
RUGGEDCOM WIN base stations
By keeping in close contact with our customers, we are able to develop and supply devices that make a positive contribution to their product strategies. Supporting the growth of the automotive industry with our high-reliability integrated circuits. Contributing to the evolution of industrial equipment with analog technologies to satisfy needs. Expanding the personal healthcare market with advanced optoelectronic devices. Contributing to the development of satellite communications with world-class reliability and track records proving top share of global market. Supporting the manufacture of communications devices, from smartphones to automotive and IoT equipment. Introducing our core technologies that support a variety of IoT-related fields. NJR is one of the few electronics manufacturers that possess expertise in designing the analog circuits that are crucial to realizing IoT.
New Japan Radio Co., Ltd.
You can search RF inductor lineup here. In the case of the wire wound type, Murata was able to achieve a compact size wire wound inductor with a minimum size of 0. We have prepared a wide variation of Q values by size and series in order to enable customers to select the optimum series according to the required Q characteristics. Since each inductor has its own characteristics, this article presents the characteristics of each inductor and the points to keep in mind when selecting an inductor.
Skip to main content Industrial Radio. In Stock. DeWalt battery tools are widely used on the jobsite. This radio is the perfect way to utilize all those DeWalt batteries we all have. The radio exhibits the same robust qualities of all the other DeWalt battery tools. I would give five stars if the speaker inside the radio sounded a little better. Add to cart. Where do i start???
Radio Frequency (RF) Components & Subsystems
Noise measures. Surge and ESD electro-static discharge refer to transient high voltage, and possibly a very dangerous noise under certain conditions. A Surge and ESD may cause malfunctions to the equipment or circuit when the level reaches a certain degree, and the level often experiences high voltage far exceeding the permissible range. In such cases, the affected component or equipment is broken in an instant. The diagram is a mapped image of surge voltage and its width. Surge and ESD are described below. Lightning as natural phenomenon contains a very large amount of energy. A lightning surge can be grouped into direct lightning surges and induced lightning surges. Protection against a direct lightning surge is difficult, but protection against induced lightning is possible. Induced lightning is a high voltage surge induced by a relatively long wire such as power line or communication cable that is nearby a lightning strike.
OUR EXPERIENCE IN A NEW DIMENSION
In an embedded system it is often desirable to communicate with another device wirelessly. This wireless communication may be accomplished through optical communication or through radio-frequency RF communication. For many applications, the medium of choice is RF since it does not require line of sight. RF communications incorporate a transmitter and a receiver. They are of various types and ranges. Some can transmit up to feet. RF modules are widely used in electronic design owing to the difficulty of designing radio circuitry. Good electronic radio design is notoriously complex because of the sensitivity of radio circuits and the accuracy of components and layouts required to achieve operation on a specific frequency.
Sairem documentation for industrial microwave and radio frequency components
The proliferation of IP networking technology in real-time, mission critical control applications requires a level of immunity to electromagnetic interference EMI beyond what is currently delivered by commercial grade networking products. Products with this technology also qualify as IEEE class 2 error-free devices. This high power, broadband wireless base station is designed for long-range deployments within licensed frequency bands under harsh environments.
MANUFACTURERS BY PRODUCT CATEGORY
RF Equipment Parts
The group has outstanding reputation in international research and can provide complete technical and engineering support for designing and manufacturing the highest quality industrial solutions. SAIREM offers a wide range of microwave and radio-frequency generators, components, and accessories, with power level from a few watts up to one hundred kilowatt that cover all electromagnetic bands for Industrial, Scientific and Medical ISM applications assigned by the International Telecommunication Union ITU. The equipment and microwave technology developed by SAIREM provides good control of temperature and all process parameters, in compliance with food safety requirements, and offering short processing time in tempering, defrosting, thawing, cooking, pasteurizing, among others applications.
Фонтейн, которого он знал, был внимателен к мелочам и требовал самой полной информации. Он всегда поощрял сотрудников к анализу и прояснению всяческих нестыковок в каждодневных делах, какими бы незначительными они ни казались. И вот теперь он требует, чтобы они проигнорировали целый ряд очень странных совпадений. Очевидно, директор что-то скрывает, но Бринкерхоффу платили за то, чтобы он помогал, а не задавал вопросы.