Questions tagged [maximum-ratings]
Questions related to the maximum ratings of a component such as maximum voltage, heat and other specs which if exceeded will likely destroy the device
297 questions
1 vote
1 answer
102 views
Exceeding Contact Rating for Rotary/Toggle Switches
The circuit I am designing will be using a voltmeter to test different high-AC voltages (<500VAC), and I would like to use some configuration of toggle switches and rotary switches to select the ...
- 11
2 votes
2 answers
265 views
Are electrical appliances wires in houses in the US thicker than in EU and why?
I guess because the 120 V in the US compared to the 240 V used in the EU, the electric currents in general will be higher in the US. Nevertheless, I am not so sure if this necessarily translates also ...
- 152
2 votes
2 answers
827 views
If polypropylene capacitors are non-polarised, why are some only DC-rated?
This question is a continuation of this post. If I understand it correctly, polypropylene film/foil capacitors are non-polarised, meaning that it doesn't matter which side is positively or negatively ...
- 73
2 votes
1 answer
93 views
How to determine maximum RF power rating of an air core impedance matching inductor at HF frequencies?
Experimenting with single-band, fixed-frequency, end-fed, half-wavelength vertical antennas in the HF frequency spectrum. These near-ground level feedpoint vertical antennas require an impedance ...
- 39
4 votes
1 answer
471 views
Driving a film capacitor at twice the rated current
I'm designing a system which uses short, high-power pulses. Many of the components that are used will be used at above their current ratings (cables at 6x, switches at 2x, etc), and this works thanks ...
- 73
3 votes
1 answer
109 views
Why are DC connectors often rated with only 12 VDC maximum?
I designed a simple 20 V splitter PCB as I don't have enough outlets for my two monitors which are driven by external 20 V @ 2.25 A (40 W) PSUs. Now, I only need one powerful switching power supply (...
- 614
5 votes
4 answers
1k views
Why doesn't the MOSFET short when I apply a voltage greater than the MAX rating
I have an IRF3205 MOSFET (datasheet): I have connected a power supply to the gate and source of the FET. The maximum gate to source is 20V. However, the FET is not damaged when I increase the gate ...
- 2,980
2 votes
1 answer
175 views
Can this diode be used for this relay coils?
Regarding this 12V DC relay, it seems it doesn't internally have flyback diode. And I'm planning to use this particular switching diode across relay coils. I conclude the diode can handle the relay ...
- 2,153
2 votes
1 answer
108 views
Can I run an axial fan with a stated max voltage of 27.6 V off the 24V supply in a truck?
Most sources online state that a truck alternator (24 V system) has an output voltage of 27.6-28.8 V. All of the 24 V axial fan options I can find on Mouser/Digikey state a max input voltage of 27.6 V....
- 23
0 votes
1 answer
63 views
What can be the the max current for this terminal?
Im looking for a panel mount screw or push terminal which can handle upto 5A DC. I came across this one. I could not find any besides it. It is written Rated load : AC50V 3A In my case the wire will ...
- 2,704
3 votes
1 answer
174 views
Max oscilloscope voltage at BNC
I know this question has already been asked, but some inconsistencies are bugging me and I wanted to find a definitive answer. I have recently bought a Rigol DHO924s. The silkscreen on the device and ...
- 33
0 votes
2 answers
79 views
Junction temperature of a switch mode power supply
Is the term 'maximum junction temperature' applicable to switch mode power supplies the way it is applied for linear regulators? If yes, what 'junction' usually it refers to for switch mode regulators?...
- 197
1 vote
1 answer
85 views
ESD protection device selection
I want to select a ESD protection IC for my circuit with the following conditions: Battery based and ultra-low-power Battery voltage 3.6 V My sensitive chips inside my circuit has Absolute Maximum ...
- 1,438
4 votes
2 answers
2k views
Why does a battery have a limit for current in amperes?
I recently learnt that the voltage of the battery (for example, a 9V battery) is constant at their bounds, whereas the battery current depends on the load that is connected to it. If I connect a 12V ...
- 41
0 votes
0 answers
55 views
Difference between Vid and Vidr
I have two different operational amplifiers datasheets with absolute maximum ratings. The TI LM358DR has a differential input voltage specification (Vid) of -32 V to 32 V, whereas the OnSemi LM358DR2G ...
- 11.7k