V22ZU05P vs V140LT2P
| Part Number |
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| Category | TVS - Varistors, MOVs | TVS - Varistors, MOVs |
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Description | VARISTOR 22V 100A DISC 5MM | VARISTOR 220V 1.2KA DISC 7MM |
| Package | Disc 5mm | Disc 7mm |
| Series | ZU | LT |
| Operating Temperature | -55°C ~ 85°C (TA) | -55°C ~ 85°C (TA) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Disc 5mm | Disc 7mm |
| Number of Circuits | 1 | 1 |
| Capacitance @ Frequency | 1220pF @ 1MHz | 160pF @ 1MHz |
| Varistor Voltage (Typ) | 22V | 220V |
| Current - Surge | 100A | 1.2kA |
| Maximum DC Volts | 18V | 180V |
| Varistor Voltage (Min) | 19.8V | 198V |
| Varistor Voltage (Max) | 24.2V | 242V |
| Maximum AC Volts | 14V | 140V |
| Energy | 0.20J | 12J |
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1. What is the difference between TVS and varistors?
The main differences between TVS and varistors are their working principles, performance parameters, application scenarios, and prices.
Working Principle
TVS (Transient Voltage Suppressor): TVS forms a PN structure on a silicon-based material and uses the breakdown characteristics of the PN junction to achieve protection. When an overvoltage occurs in the circuit, the resistance value of the TVS changes rapidly, thereby protecting other components in the circuit.
Varistor: Varistors use the nonlinear resistance characteristics of materials such as zinc oxide to achieve overvoltage protection. When an overvoltage occurs in the circuit, the resistance value of the varistor also changes, thereby protecting the circuit.
Performance Parameters
Overvoltage resistance: TVS is usually more resistant to overvoltage than varistors and can withstand higher voltages and currents.
Response time: TVS usually has a shorter response time than varistors and can respond to overvoltage events in a shorter time.
Lifespan: TVS usually has a longer lifespan than varistors because the PN junction of TVS can self-recover after breakdown, while varistors usually break down after a breakdown.
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2. 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. -
3. 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.
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4. What is a Doppler function TVS?
TVS (Transvaginal Sonography) with Doppler function is a non-invasive medical imaging method, mainly used to evaluate the structure and function of the female reproductive system. TVS uses high-frequency acoustic imaging technology to observe the anatomical structure and abnormalities of pelvic organs such as the uterus and ovaries, and is often used for the diagnosis and monitoring of gynecological diseases.
