VC1210L401R008 vs VC1210K251R040
| Part Number |
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| Category | TVS - Varistors, MOVs | TVS - Varistors, MOVs |
| Manufacturer | KEMET | KEMET |
| Description | VARISTOR 15V 400A 1210 | VARISTOR 68V 150A 1210 |
| Package | 1210 (3225 Metric) | 1210 (3225 Metric) |
| Series | Automotive, AEC-Q200, VC | Automotive, AEC-Q200, VC |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 1210 (3225 Metric) | 1210 (3225 Metric) |
| Number of Circuits | 1 | 1 |
| Varistor Voltage (Typ) | 15V | 68V |
| Current - Surge | 400A | 150A |
| Maximum DC Volts | 11V | 56V |
| Varistor Voltage (Min) | 12.75V | 61.2V |
| Varistor Voltage (Max) | 17.25V | 74.8V |
| Maximum AC Volts | 8V | 40V |
| Energy | 1.1J | 2.4J |
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1. What is the difference between varistors and MOVs?
There are some differences between varistors and MOVs (Metal Oxide Varistors) in terms of definition, characteristics, and applications.
Definition and Characteristics
Varistor (VDR/MOV): A varistor is a voltage-sensitive resistor whose resistance value changes with voltage. When an excessively high voltage appears in a circuit, the internal resistance of the varistor drops sharply and turns on quickly, protecting electronic components from surges. MOVs are usually made of zinc oxide and have the characteristics of large current flow, slow response speed, and large parasitic capacitance.
MOV: Specifically refers to metal oxide varistor, which is a type of varistor and is widely used in electronic circuits. Its characteristics include large current flow, slow response speed, and large parasitic capacitance.
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2. What are Movs?
Movs(Move String) is an instruction cluster in assembly language, mainly used to copy strings. The Movs instruction cluster includes multiple variants for handling data movement operations of different lengths.
Basic Functions
The main function of the Movs instruction is to copy the data of the DSSI address to the ESDI address. Specifically:
MOVSB: Move one byte at a time.
MOVSW: Move one word (usually two bytes) at a time.
MOVSD: Move one double word (usually four bytes) at a time.
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3. What is the use of MOV varistor?
MOV varistor (Metal-Oxide Varistor, referred to as MOV) is mainly used for overvoltage protection, especially in the fields of power electronics, communication electronics and industrial control.
Main use
Overvoltage protection: MOV varistors play the role of overvoltage protection in the circuit. They can quickly reduce their resistance value when voltage spikes or surges occur, thereby consuming surge energy and protecting other components in the circuit from damage.
Electrostatic protection: MOV varistors are often used for electrostatic protection, especially at the power input end, which can effectively prevent static electricity from damaging the circuit.
Lightning protection: By suppressing the surge voltage caused by lightning strikes, the equipment is protected from lightning strikes. -
4. What is the difference between TVS diodes and MOVs?
The main differences between TVS diodes and MOV varistors are the working principle, application scenarios and performance characteristics.
Working principle
T VS diode is a semiconductor device with nonlinear volt-ampere characteristics, and its working principle is based on the breakdown phenomenon of PN junction. When TVS diode is subjected to reverse transient high voltage, its impedance drops rapidly, absorbing most of the energy and clamping the voltage at a safe value, thereby protecting electronic components 12. TVS diode has a small leakage current before breakdown, and it behaves as a voltage regulator after breakdown, with a strong voltage clamping ability.
MOV varistor is a multi-layer structure made of zinc oxide material with a multi-grain structure, which absorbs surge current by changing the conduction resistance. When the voltage exceeds its varistor voltage, the resistance of MOV drops rapidly, shunting the current, thereby protecting the subsequent circuit 45. MOV has a higher clamping voltage when the current is too large, and a larger leakage current when the voltage is low.
