Electrical Engineering Stack Exchange
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Questions tagged [tvs]

Transient Voltage Suppressors (TVS) are a type of semiconductor designed to protect against overvoltage situations.

TVS on Wikipedia

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Is there a limit of how many times I can hit a TVS diode with an overvoltage?

I have a system that is powered by 2 batteries that are OR'd together through 2 diodes. They are powering up a speed controller that drives a motor. Right now, when my motor brakes, I am getting an overvoltage on the input of the speed controller.…
J. Jones
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TVS diode for push button switch section

Do push button switch signals require aTVS diode in the path? I have seen TVS diodes for push button switch signals in many circuits along with pull resistor, capacitor (RC for debouncing) as in this image: What is the exact purpose of TS6 TVS…
Sathish
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Why are different currents through the TVS diode or 8-20 us and 10-1000 us

In datasheet you can see that the currents are different. For any TVS diodes, Ipp(8-20)> Ipp(10-1000). For an example, see datasheet SM15TY I do not understand why the current depends on the overvoltage time?
AndreyB
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Using TVS at the circuit input with or without a resistor

I'm new in the subject and cannot figure out how to use TVS for a particular reason. Here is what I commonly see TVS at the input of a circuit: Here another circuit has TVS again at the input, but this time with a resistor before: So should the…
GNZ
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TVS diode dissipation help

This board has been very helpful to me, I am stuck with a small problem again. The datasheet is here. Part name: SMDJ series. I have a pulse train coming from an ignition system, the power I calculate is about 4 Watts of Pavg. When I refer to the…
Adi
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TVS diode: max breakdown voltage

Source: Vishay SMBJ36A-E3/52 datasheet I understand the standoff voltage of the TVS diode. The breakdown voltage is said to be the point at which it starts flowing significant current, around 1mA. So what does the Max Breakdown voltage concept…
Electronx
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Why does the peak pulse current of a TVS diode decrease as the breakdown voltage increases?

From the above picture, we can see that the peak pulse current of a TVS diode decreases as the breakdown voltage increases. Why does that happen? Usually, when the voltage is high the current should also be high.
yunlong wang
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Can a 3.3V power supply use the same type of TVS diode for the 3.3V and data lines?

I have a PCB with 3.3V data lines and power supply lines. Both require ESD TVS diodes. In the past I have used the same PESD0402-140 datasheet diode for both, but I feel like this is likely not a good idea. The power supply can have up to 2A. …
Feynman137
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TVS diode why Vrwm should be above maximum operating voltage?

In my quest on how to select the relevant TVS diode, I came across this document. Page 3 paragraph 2.1, it is stated : Vrwm The reverse working maximum voltage (VRWM) is defined as the voltage that can be applied to a TVS diode with an assurance…
Julien
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unsure of TVS validity, can someone possibly confirm?

I have designed a MDD SD03 across a 3v3 supply. The 3v3 is being carried through a cat5 cable via an RJ45 socket. I assume this is totally fine, although can someone who knows about these devices confirm this before I send them off for production?
Bringle
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How does a bi-directional TVS diode work during breakdown?

To protect the low voltage DC circuit (5 V) from receiving high AC voltage (230 V), I want to use the TVS diode, which closes the low voltage circuit to ground and blows the fuse. I hope this is a good option for protecting low voltage circuits with…
Delta
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Will the TVS diode work if a high alternating voltage accidentally gets into the circuit?

I have a controller with power lines 220V / 12V / 5V. The 220 V line is well insulated from low voltage circuits. On the 12 V line, a TVS P6SMB16CA diode is connected. What happens if 220 V accidentally hits the 12 V line? Will the TVS diode trip…
Delta
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Old crt tv help

my old portable crt television has this port on the back that looks like a headphone jack, but it's labeled ext ant. Can I connect a rf modulator to that port at all? Thanks...
ant888nsmb2
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how to test LEDs

I am a retired electronics engineer trying to fix my black screen Toshiba LCD/LED 40" TV. I have watched various videos showing how to test individual LEDs by scratching the track on either side. I have tried using 3 AAA batteries in series with…
Frank
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TVS diode selection for IR LED array

I need help in selecting the right TVS diode. I am working on a home security system with a D-Link DCS-5222 camera. I have built an IR LED array to provide night illumination. The IR LED array is powered by 12VDC and uses about 1000mA. I want…
laserman2431
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