Questions tagged [varistor]
A varistor is a component with an electrical resistance that varies with the applied voltage. Also known as a voltage-dependent resistor, it has a non-linear, non-ohmic I/V characteristic. (From: Wikipedia)
113 questions
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Trying to identify and cross reference capacitor or varistor
Original part off dishwasher main board. I have a few others similar was wondering if they would work or not.
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500V Surge Protection 24V
The circuit shown above is my current protective circuit. The device must withstand 500V surge pulses in accordance with the 61000-4-5 standard. The device is operated with 24V. I now have the ...
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Surge protection of 10 - 15 V AC garden power supply input
I am building a power supply that will be used outside - permanently installed in the garden. It will be supplied by 15V AC that is made using a 110V / 15V transformer. The output of my device will be ...
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Can anyone help me to identify an IC marked FSHT?
Can anybody help me identify this IC marked FSHT?
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Max voltage of a varistor
I am currently investigating the EN 61010 standard. I have to protect my circuit for transient overvoltages in CAT 3. This results in impulse withstand voltage peaks of 4 kV on the mains supply. I ...
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1 answer
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Inductive surge suppression for DC motor
I have this beefy brushed motor (24VDC, 30A at full load). It's relay driven (not negotiable due to requirements of electromechanical safety) so start and stops give problem. The interruption rating ...
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Varistor and Fuse Failures in Control Panel During Power Failures - Seeking Advice on Enhanced Protection
Question: I'm facing a recurring issue with our control panels used for firefighting and fire alarm systems. During power failures, the varistors, responsible for overvoltage and undervoltage ...
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MOV and resistor selection of smps,flyback converter
I am designing a flyback converter. Input is 60-300 V AC. At the input I am giving a mov and there is a resistor. What is the use of that resistor (10 Ω 2 W)? Will it be acting as a fuse or is it to ...
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Jump on varistor I/V curve when "passing" through max. leakage current region to max. clamping voltage region?
I'm taking a course on semiconductor physics and another on something like "usage of electronic devices". On both I've come across the I/V curve on a varistor, this is: I cannot find the ...
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What is this TC1032F, 2-lead blue disc component?
A centipede shorted out my Samsung A/C PCB and it looks like this component has burnt off. I want to replace it but can't seem to find a replacement or how to read it with googling. Can anybody help ...
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What is this part called and what can I replace it with?
I have been trying to figure out what this part is called and what I can replace it with (see pics). It seems to be called a capacitor, varistor, or thermistor when I do an image search. It's black ...
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Plugable Varistor and Fuse Cartridge for easy and safe replacement
As I have concluded with some tests, by reading some posts and even asking a question on this forum, Varistors can get damaged with multiple or even just one cycle of use. They fail as a short, being ...
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