B554-2T

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Thyristors are a type of semiconductor device with unidirectional current as its main characteristics. In today's market, thyristors are classified according to their characteristics, including SCR (silicon-controlled rectifier), Triac, Bi-conditional thyristor, low-power thyristor, opto-electronic thyristor and so on. Among them, SCR, short for Silicon Controlled Rectifier, is spelled part of the abbreviation of its English name, refers to a type of thyristor with three interconnected junctions of N and P type semiconductors. It is mainly composed of two parts, namely Anode and Gate. As a three-terminal semiconductor device, it can control and switch a larger current/voltage by a smaller current/voltage. SCR modules are the product of SCRs integrated in one circuit board, providing both convenience and safety to thyristor users in application. B554-2T is one of the leading products of SCR modules that are widely used in photoelectricity, electric heating, smart meters, intelligent cathode control and so on. It is largely composed of two or three layers of module base, top cover, heat sink and junction block, with low-resistance wire and Anode underneath.

B554-2T's main application field lies in the switching control and regulation of the electric power circuits in a variety of voltage levels. In its working state, the junction of Anode and Gate are biased to create a static electric field, giving field effect to the state of the thyristor. When its Gate is not yet energized, the Anode voltage of its body diode is latching force, so the thyristor is in the so-called “blocking” state. If the Gate receives a pulse signal, it will excite the static electric field and cause a large current that maybe several hundred times higher than the control current, enabling the thyristor to switch the circuit. Though pulsed constantly, the thyristor will remain “on” due to its latching force.

The green features of B554-2T can be summarized as follows: firstly, as for its insulation grade, its Dielectric strength meets the requirements of class D in the IEC664 international standard, meeting the demands of different environments; secondly, its junction temperature range is 130°C , allowing the users to make full use of its advantages of higher power to volume ratio and lower energy consumption; thirdly, its voltage is related to the number and composition of components, with 100V as the minimum; finally, its external terminals are securely insulated with plastic material, creating a one-piece appearance.

In general, the B554-2T SCR Module is an ideal choice for users who need high power and low cost. Thanks to its high breakdown voltage, high withstand leakage current, low capacitance and so on, it ensures a longer life, higher reliability and safer operation. As an international famous brand, ZYSCR provides a stable quality and expert service to ensure that customers are provided with the highest quality products.

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