AutoMHa electrical components Germany AutoMHa model AutoMHa price

AutoMHa electrical component is a resistive device with nonlinear voltage-current characteristics, mainly used for voltage clamping when the circuit is subjected to overvoltage, absorbing excess current to protect sensitive devices. The resistive body material of varistors is semiconductor, so it is a type of semiconductor resistor. The currently widely used "zinc oxide" varistor has a main body composed of divalent element zinc and hexavalent element oxygen. Therefore, from a material perspective, zinc oxide varistors are a type of "II-VI group oxide semiconductor". In Taiwan, China, varistors are called "surge absorbers", and sometimes also referred to as "electric shock (surge) suppressors (absorbers)". Varistors are voltage-limiting protection devices. Utilizing the nonlinear characteristics of varistors, when overvoltage appears between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed value, thereby achieving protection for the downstream circuit. The main parameters of varistors include: varistor voltage, current handling capacity, junction capacitance, response time, etc. The response time of varistors is at the ns level, faster than gas discharge tubes, but slightly slower than TVS tubes. Generally, their response speed meets the requirements for overvoltage protection in electronic circuits. The junction capacitance of varistors is generally in the range of hundreds to thousands of Pf, making them unsuitable for direct application in high-frequency signal line protection in many cases. When applied in AC circuit protection, their larger junction capacitance increases leakage current, which must be fully considered in protective circuit design. Varistors have a large current handling capacity, but smaller than that of gas discharge tubes. Varistors, abbreviated as VDR, are voltage-sensitive nonlinear overvoltage protection semiconductor components.

AutoMHa electrical component structure

The rated current of the fuse element is not equal to the rated current of the fuse. The rated current of the fuse element is selected based on the load current of the protected equipment. The rated current of the fuse should be greater than the rated current of the fuse element and determined in coordination with the main electrical appliance. The fuse mainly consists of 14 parts: the fuse element, housing, and support. Among these, the fuse element is the key component controlling the fusing characteristics. The material, dimensions, and shape of the fuse element determine the fusing characteristics. Fuse element materials are divided into two categories: low melting point and high melting point. Low melting point materials, such as lead and lead alloys, have low melting points and fuse easily. Due to their higher resistivity, they require larger cross-sectional dimensions when made into fuse elements, producing more metal vapor during fusing, and are only suitable for fuses with low breaking capacity. High melting point materials, such as copper and silver, have high melting points and do not fuse easily. However, due to their lower resistivity, they can be made with smaller cross-sectional dimensions than low melting point fuse elements, producing less metal vapor during fusing, and are suitable for fuses with high breaking capacity. The shape of fuse elements is divided into wire-type and strip-type. Changing the shape of the variable cross-section can significantly alter the fusing characteristics of the fuse. Fuses have various fusing characteristic curves, suitable for the needs of different types of protected objects.

AutoMHa electrical component classification

In different application scenarios, the purpose of using varistors varies, and the voltage/current stress applied to the varistors is not the same, resulting in different requirements for varistors. Distinguishing these differences is crucial for correct usage. Based on the purpose of use, varistors can be divided into two major categories: protection varistors and circuit function varistors. ① Protection varistors: 1, distinguish between power supply protection and signal line/data line protection varistors, as they must meet different technical standard requirements. 2, based on the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into AC type or DC type. Varistors exhibit different aging characteristics under these two voltage stresses. 12, based on the different abnormal overvoltage characteristics withstand by varistors, varistors can be divided into three types: surge suppression type, high power type, and high energy type. ② Surge suppression type: refers to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. ③ High power type: refers to varistors used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, impulse voltages appear periodically, and the period is known. The energy value can generally be calculated. Although the voltage peak is not large, the average power is quite high due to the high frequency of occurrence. ④ High energy type: refers to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protection function of varistors can be repeated multiple times in most application scenarios, but sometimes they are made into one-time protection devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

AutoMHa electrical component classification

Terminal blocks can be divided into European-style terminal block series, plug-in terminal block series, transformer terminal blocks, building wiring terminals, fence-style terminal block series, spring-style terminal block series, DIN rail terminal block series, wall-through terminal block series, optocoupler terminal block series, various ring terminals, tubular terminals, terminal blocks, copper strips, iron strips, etc. Usage methods include plug-in, fence-style, spring-style, DIN rail, wall-through, and fuse terminals.

Weidou Intelligent Technology professionally sells German AutoMHa connectors, AutoMHa switches, AutoMHa relays, AutoMHa controllers, AutoMHa plugs, AutoMHa sensors, AutoMHa resistors, AutoMHa capacitors, AutoMHa buses, AutoMHa modules, AutoMHa cables, AutoMHa power supplies, AutoMHa interfaces, AutoMHa gateways, AutoMHa circuit breakers, AutoMHa original imports from Germany. Welcome customers to inquire and order.