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September 20,2023

What are the differences between TVS diodes and voltage regulator diodes.reset motor thermostat on shark vacuum

　　　　In circuit applications, the application range of diodes is becoming increasingly widespread, among which TVS diodes and voltage regulator diodes are more common. Many people are not very clear about these two. Today, the editor leads everyone to re understand them.　　From a definition perspective, TVS diode is an efficient circuit protection device developed on the basis of voltage regulator technology. Its circuit symbol and appearance are the same as ordinary voltage regulator diodes; Zener diode, also known as Zener diode, refers to the phenomenon of using a pn junction to reverse breakdown state, and its current can change over a large range while the voltage remains basically unchanged, making it a diode that plays a stabilizing role. (Related reading: Principles and Introduction of Transient Suppression Diodes (TVS))　　In principle, when the two ends of a TVS tube are subjected to instantaneous high-energy shocks, it can suddenly reduce its impedance at a very high speed (up t

August 28,2024

The correct steps for selecting a self recovering fuse model

　　　　1. Determine the following parameters of the circuit:　　● Maximum working environment temperature　　● Standard operating current　　Maximum operating voltage (maximum)　　Maximum fault current (Imax)　　2. Choose a resettable fuse that can adapt to the highest ambient temperature and standard operating current of the circuit.　　Use the table below and select the temperature that best matches the highest ambient temperature of the circuit.　　Browse this column to find values equal to or greater than the standard operating current of the circuit.　　3. Compare the maximum electrical rating of the selected component with the maximum operating voltage and fault current of the circuit.　　Use electrical characteristics to verify whether the components selected in step 2 will use the maximum operating voltage and fault current of the circuit.　　Check the maximum operating voltage and maximum fault current of the equipment.　　Ensure that Umax and Imax are greater than or equal to the maximum operating vo

September 22,2023

Surface Mount Fuses.motorcycle fuse block with relay

　　　　1. The location where the patch fuse is connected to the circuit　　When connecting patch fuses in a circuit, it is important to be careful not to connect the fuse to the neutral or ground wire. The correct connection is to connect it to the live wire, so that when the circuit is overloaded, the fuse can be blown in a timely manner to protect circuit safety. If only connected to the neutral line or ground wire, the fuse should blow in a timely manner, but the voltage carried by the positive and negative poles through the live wire may also cause the circuit to burn out. Therefore, the priority order for fuses to be connected to the circuit is the live wire, neutral wire, and ground wire.　　The location where the fuse is connected to the circuit　　2. Connection method of patch fuse in circuit　　Usually, fuses are connected in series in a circuit. If the fuses are connected in parallel in the circuit, the current cannot be disconnected in a timely manner in case of abnormal conditions in

July 06,2023

Fuse classification.fast blow or slow blow fuse for multimeter

　　　　According to the protection form, it can be divided into overcurrent protection and overheating protection. The fuse used for overcurrent protection is commonly referred to as a fuse (also known as a current limiting fuse). The fuse used for overheat protection is generally called "Thermal cutoff". Thermal cutoff can also be divided into low melting point alloy, temperature sensing trigger and memory alloy (Thermal cutoff is used to protect heating appliances or easily heating appliances from high temperature, such as hair dryer, electric iron, rice cooker, electric stove, transformer, motor, etc.; it responds to the rise in temperature of electrical appliances and does not care about the working current of the circuit. Its working principle is different from "current limiting fuse").　　According to the scope of use, it can be divided into: power fuse, machine tool fuse, electrical instrument fuse (electronic fuse), and automotive fuse.　　According to body integration, it can be divi

December 04,2023

ptc-100 programmable thermal controller manual.Electrical testing process for self restoring fuses

　　　　I hold current　　I hold, high non operating current (maintenance current), refers to the high current that PPTC always maintains its low resistance state at the specified ambient temperature (priority 25 ℃).　　I hold: maintain current;　　V max: withstand high voltage;　　T trip: specifies the large action time under the current;　　R: Zero power resistance measured at a certain temperature;　　I trip: action current;　　I max: The maximum current that can be withstood;　　P d: steady-state power consumption in high resistance state;　　R 1max.: The high resistance value measured at room temperature after one hour of action or soldering.　　Let's take a look at the internal structure of the device, as shown in Figure 4. Place the test sample in a specified temperature and condition test box, connect the PPTC to a constant current or constant voltage source, and preset the current value to the specified I hold, with the voltage limited to 90% of V max. After the specified time in the detailed specifi

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Fuseless car charger, carefully burn your phone

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