All Questions
Tagged with protection esd
58
questions
0
votes
2
answers
61
views
How to select ESD TVS diode? [closed]
This is the following specification of my circuit
Vin 8V to 32V
The breakdown voltage should be 33V of TVS
I don't know what clamping voltage means please simplify it for me
What should be Vc?
- 117
0
votes
1
answer
107
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Arduino Uno ESD ruggedness
I want to route one of the Arduino's digital output pins out of a device, to interface with other instruments via a several meter long coax cable. Typically, I would implement measures against ESD for ...
- 22.5k
2
votes
3
answers
273
views
Ferrite bead value for a LIN bus protection circuit
What is the proper value for FB1 in relation to the surrounding capacitors in this diagram?
The FB1 resistance is measured to 0.76ohm and package size is 0603. All components are AEC-Q200 rated.
The ...
- 21
1
vote
1
answer
117
views
Auxiliary mechanical anti-ESD measures
If a PCBA within a plastic enclosure is prone to malfunctioning due to ESD air discharge in proximity of enclosure seams and openings, but changing the hardware or plastic design is not an option, ...
0
votes
2
answers
90
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Does ESD protection cause voltage leakage?
I have a this schematic for powering ESP32 over the usb and communicate PC with usb interface. It works perfect. But there is a interesting error. while I am powering ESP32 with Lipo battery (In case ...
- 1,139
1
vote
2
answers
142
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Correct way of optical input EMC protection
I tried to find an answer online, but didn't find anything that would make my doubt go away.
The thing is: when you want to protect any input, that is referenced to ground, you use ground-referenced ...
- 43
2
votes
0
answers
73
views
Ethernet PHY ESD protection, difference in components
I'm using a Würth Elektronik 7498210220A jack (datasheet) and I need to add ESD protection to TD and RD lines of this Ethernet connector (with integrated magnetics).
Application of this Ethernet ...
- 457
0
votes
0
answers
38
views
USB ESD Protection with the NUF2042XV6T1G IC
I have been trying to figure out how exactly I should connect the NUF2042XV6T1G IC to my USB data lines. From what I understand, usually a reverse biased transile diode is connected between the data ...
- 23
0
votes
1
answer
70
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I'm making a development board for ESP32 S2 board, I want to achieve IEC61000-4-2 (level 4) ESD protection on the connectors
I am using a 4 channel TVS(diode) array that has a max clamping voltage of 12V. I have a voltage devidor to translate 5V to 2.5V. So I asume that max clamped input is 6V if an ESD event occurs.
I read ...
- 1
1
vote
0
answers
144
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What will happen if I choose a higher value capacitor for ESD protection than the recommended value?
I want to protect my circuit from ESD, for which I have chosen a capacitor as ESD protection due to size and cost.
I have chosen a KEMET 1000 pF 16V with 25 kV breakdown voltage capacitor value ...
7
votes
3
answers
1k
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Protecting from ESD only with resistors and BAT54
I have a device with too many external contacts exposed to ESD, I search for a way to reduce cost of ESD protection.
According to datasheet BAT54 can stand 1 A non-repetitive peak forward current. So ...
4
votes
4
answers
1k
views
Protecting MCU digital input with 300m wires
I need to protect the inputs and a 3.3V MCU (ESP32) from damage (eg lightning) and noise with a switch connected at the end of a cable that can be hundreds of meters long.
Based on the schematic (Fig ...
- 41
0
votes
0
answers
437
views
How to best protect 12V from voltage transient spikes?
I am building an AC power supply and I decided to put digital current and voltage panel meters into it.
I have an issue where whenever my main contactor engages and disengages, there is a transient ...
- 1
2
votes
1
answer
169
views
Transient and Surge Protection
It seems that when choosing ESD/TVS diodes, MOVS and GDTs that while their clamping voltage is rated in Volts, their protection is rated in Watts or Joules.
For example, the LittleFuse SMCJ250CA is ...
- 49
4
votes
3
answers
526
views
Polarity of TVS diode is unclear
I have a question regarding the DESD1LIN2WSQ TVS diode by Diodes Inc. which I want to use to protect some 24V IOs of a microcontroller board.
Until now, the TVS diodes I worked with always had the ...
- 2,803