TVS: TVS (Transient Voltage Suppressors), transient voltage suppressors, also known as transient voltage suppression diodes. It is a reverse parallel connection in the circuit used in the voltage-limiting surge protection components,which has a distinguish with single or bidirectional . Because of its PS-level response speed, larger transient power, lower leakage current and capacitance,Lower clamping voltage , the breakdown voltage deviation is small, high reliability, small size, easy to install and other characteristics, widely used in sensitive electronic parts over-voltage protection, in automotive electronics, consumer electronics, industrial equipment, household appliances, communications equipment and other fields.
ESD (Electro-Static discharge), is a single or multiple ESD protection device designed by TVS die and capacitance reduction tube using different layouts with specific functions. It has the characteristics of fast response speed (less than 0.5ns), lower capacitance, lower breakdown voltage, higher integration, smaller size, easy installation, packaging diversity, etc. It can achieve multiple data lines protection at the same time, and is an ideal device for high-frequency data protection, which is Widely used in all kinds of communication interface static protection, such as USB, HDMI, RS485, RS232, VGA, RJ11, RJ45, BNC, SIM, SD and so on.
FRD (Fast Recovery Diode) is a semiconductor diode with good switching characteristics and short reverse recovery time. Reverse recovery time is usually a few hundred nanoseconds, and has the advantages of good switching characteristics, short reverse recovery time, forward current, small size, easy to install, etc., can be used as a high-frequency, high-current rectifier, renewable diode, in the switching power supply, pulse-width modulator, uninterruptible power supply, high-frequency heating, AC motor frequency conversion speed control and other electronic equipment has been widely used.
TSS: TSS (Thyristor Surge Suppressors), is a semiconductor process made of PNPN junction four-layer structure of the device, its V-I characteristics are similar to the thyristor, with the typical switching characteristics, and connected in parallel in the circuit application. It has a precise on-state voltage, faster response speed, Higher surge absorption capacity, lower capacitance, no polarity, and packaging diversification features, to meet the needs of different installation space and other characteristics, available in communication ports, such as RJ11, SLIC and other ports.
RD (Rectifier Diode), is a semiconductor device used to convert alternating current (AC) into direct current (DC), with good switching characteristics, higher Reverse breakdown voltage, Lower reverse leakage current, Better high temperature performance and other characteristics. Mainly used in a variety of power rectifier circuit, the main consideration of choosing Rectifier Diode is the maximum average rectifier current, maximum reverse leakage current, cut-off frequency and reverse recovery time and other parameters.
SR (Schottky Rectifier Diode) is the use of metal and semiconductor contact formed by the metal- semiconductor junction principle of production, with a higher switching frequency and Lower forward voltage etc, suitable for use in low-voltage, high-current output occasions used as a high-frequency rectifier. In the very high-frequency (such as the X-band, C-band, S-band, and Ku-band)，SR is used for detecting and mixing, and used as a clamping device in high-speed logic circuits. It is also used as a clamping device in high speed logic circuits.
ZD (Zener Diode) is a diode made by using the reverse breakdown state of the PN junction (a phenomenon in which the current can be varied over a wide range while the voltage remains basically unchanged) to regulate the voltage. Voltage regulator diode is a kind of semiconductor device with high resistance until the critical reverse breakdown voltage, in this critical breakdown point, the reverse resistance is reduced to a very small value, the current increases in this low-resistance area and the voltage is kept constant, ZD is based on the breakdown voltage to grade. Because of this characteristic, ZD is mainly used as voltage regulators or voltage reference elements. ZD can be connected in series for use at higher voltages, and by connecting them in series a higher stabilised voltage can be obtained.
GDT (Gas Discharge Tube) is a hermetically sealed device consisting of one or more discharge gaps filled with an inert gas.The electrical performance of GDT depends on the type of gas, gas pressure, internal electrode structure, production process and other factors. When the voltage added to the two electrodes reaches to make the GDT gas breakdown, start discharging, from high impedance to low impedance, so that the surge voltage quickly short-circuited to close to zero voltage, and will release the overcurrent into the ground, so as to play a protective role for the subsequent circuit. GDTs can withstand tens or even hundreds KA of surge current, have extremely lower junction capacitance, and are used to protect electronic equipment and people from transient high voltage hazards. Nominal Impulse Discharge Current can be from 3KA to 20KA, or even higher; insulation resistance value can reach 1GMΩ; inter-pole capacitance as low as 1.5PF; widely used in communication lines, communication distribution frame security unit and high frequency circuit for lightning protection.
MOV(Metal Oxide Varistor) is a voltage sensitive surge limiting device made of polycrystalline semiconductor ceramic components with zinc oxide as the main body, doped with a variety of metal oxides, and made by typical electronic ceramic process. The varistor has a symmetrical volt-ampere characteristic curve, the current flowing through the MOV increases exponentially with the increase of the voltage at both ends of the MOV. On the application occasion, MOV is generally connected in parallel in the circuit, when the circuit works normally, it is in high resistance state, does not affect the normal operation of the circuit. When an abnormal transient overvoltage occurs in the circuit and reaches its on-state voltage, the MOV quickly changes from a high-resistance state to a low-resistance state, discharging the transient overcurrent caused by the abnormal transient overvoltage, and at the same time clamping the abnormal transient overvoltage at a safe level to protect the back-end circuits from the damage caused by the abnormal transient overvoltage.The MOVs have a high transient impulse absorption capability and a large capacitance, which are generally applied to the lightning protection of AC/AC inputs. AC input lightning protection. Since the surge absorption capability of a varistor depends on its physical size, different transient surge current values can be obtained by custom fabricating MOVs of different sizes.
FSD (Fast Switching Diode) is in the circuit for the "on", "off" and special design and manufacture of a class of diodes. Due to the semiconductor diode has a unidirectional conductive properties, in the positive bias under the PN junction conduction, in the conduction state of the resistance is very small, about tens to hundreds of ohms; in the reverse bias, it is the cut-off state, its resistance is very high. Switching diode has a faster switching speed, smaller size, long life, higher reliability, widely used in electronic equipment switching circuits, detector circuits, high frequency and pulse rectifier circuits and automatic control circuits.
PPTC (Polymer Positive Temperature Coefficient) is composed of polymer matrix material and conductive particles, is an overcurrent protection component with automatic recovery function, used in series in the circuit. When there is an abnormal overcurrent through the PPTC, the heat generated by the polymer matrix material expansion, wrapped in the polymer matrix material outside the conductive particles will be separated to cut off the conductive channel of the PPTC so that the PPTC resistance rises, thus reducing the abnormal overcurrent. When the abnormal overcurrent fault is cleared, the PPTC polymer matrix material shrinks to its original shape and re-connects the conductive particles, the conductive channel will be restored, and the PPTC resistance is restored to its original low resistance state, and its biggest advantage is that it can be restored on its own. Recoverable fuses are sensitive to current and temperature, so they are widely used in computers, electronic rectifiers, automobiles, communications, household electrical drains, batteries and other industrial areas.
FUSE, defined as "fuse-link" in IEC 127. It is mainly used for overload protection. When a fuse is correctly placed in a circuit, it will cut off the current when the current rises abnormally to a certain height and heat, thus protecting the circuit from overloading.
BRD (Bridge Rectifier Diode) is made of multiple rectifier diodes for the bridge connection, plastic encapsulation, higher-power bridge rectifier in the insulating layer outside the addition of a metal shell encapsulation, to enhance heat dissipation. Bridge rectifier varieties, excellent performance, higher rectification efficiency, higher stability, the maximum average rectifier currentis up to 50A, the highest peak reverse voltage is up to 1000V. Can be widely used in: switching power supply, LED lighting, integrated circuits, mobile communications, computers, industrial automation control facilities, automotive electronics and LCD TVs, smart home, medical equipment, induction cookers etc.
Contactor, an electrical control device, is an appliance that causes a predetermined step change in the controlled quantity in an electrical output circuit when the change in the input quantity meets the specified requirements. It has an interactive relationship between the control system (also known as input circuit) and the controlled system (also known as output circuit). Usually used in automated control circuits, it is actually a kind of "automatic switch" that controls the operation of large currents with small currents. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit. Widely used in remote control, telemetry, communications, automatic control, electromechanical integration and power electronic equipment, is one of the most important control components.
