Key Topics

TVS Diodes

TVS (transient voltage suppression) diodes protect electronics from spikes in voltage. They are widely used as they’re considered one of the best means of dealing with “overvoltage events,” quickly suppressing electrical flow and protecting components and entire circuits from damage by absorbing high volumes of transient energy. You might also find TVD diodes labelled as transils or thyrectors.

How do TVS diodes work?

TVS diodes have larger cross-sectional areas than normal diodes, allowing them to absorb higher levels of current and conduct them to ground. TVS diodes direct high voltage away from circuits to prevent them burning out or components becoming damaged.

Why are TVS diodes used?

TVS diodes are used to protect semi-conductor components within circuits, as well as circuits themselves, from spikes in voltage that have the potential to blow them out or lead to them wearing out quicker. TVS diodes are typically chosen in place of other diodes for their ability to absorb and conduct higher levels of electrical current.

Do TVS diodes have polarity?

Yes. If they are fitted onto a circuit incorrectly, they won’t conduct electricity and therefore won’t offer protection to your circuit. If replacing a TVS diode yourself, you should ensure you fit it the right way round to maintain protection against overvoltage events.

How can I identify a TVS diode?

TVS diodes are usually, but not always, located near the power connector. They are usually surface mounted and either cylindrical or rectangular shaped. As they’re small parts, they will usually be marked with an abbreviated part number.

Top TVS Diodes Products
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1.5KE180CA
STMicroelectronics
1.5KE180CA BIPOLAR TRANS SUPPR A
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1.5KE200CA
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1.5KE200CA TRANS VOLT SUPP BI-DIRECT AXIA
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P6KE56A
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TVS Diodes - Transient Voltage Suppressors 66V 10KA Tube
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LTKAK10-076C
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140V Clamp 10000A (10kA) (8/20µs) Ipp Tvs Diode Surface Mount SMTO-218 Tab
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LTKAK6-058C
Littelfuse
110V Clamp 6000A (6kA) (8/20µs) Ipp Tvs Diode Surface Mount SMTO-218 Tab
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1.5KE47A
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1.5KE47A UNIV TRANS SUPPRESSOR AXIAL
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1.5KE18CA
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5KASMC43AHM3/57
Vishay
Diode TVS Single Uni-Dir 43V 5KW Automotive 2-Pin SMC T/R
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5KP10
Littelfuse
TVS Diodes - Transient Voltage Suppressors 10Vso 7VAC 266A
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5KP10A
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Diode: transil; 5kW; 11.1÷12.8V; unidirectional; P600
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5KP11A
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5KP11A-B
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5KP11CA
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5KP120A
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5KP120CA
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ESD Suppressors / TVS Diodes 5KP120CA