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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

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Voltage rating on panel jack

I'm building a power converter that will take 20 VDC input. I have a cable with a 1.7 x 4.0 mm plug, so I'm trying to find a suitable panel mount jack. Online, I've found this model. On the Philmore ...
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46 views

High level present in a pin of a non-powered IC can damage it?

I'm using a TXS0108E to convert from 5V to 3.3V and vice versa. The schematic is below: In the datasheet, in section 6, I read the following: Voltage applied to any output in the high-impedance or ...
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64 views

Current Rating of a device (how does this change when changing the voltage)

Let's say you have a device that is rated at the following: 550 amps @ 12Vdc (heat) Max Voltage = 48Vdc (insulation material max voltage rating) I am mainly concerned with the heat, we could ...
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70 views

Discharging a capacitor with an analog switch

I'm designing an op amp integrator with a 100nF capacitor, and need to include a logic level reset/discharge option. I would like to use the DG467 analog switch due to its low cost and small package, ...
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43 views

Determining Absolute Maximums for IC Output Current and Power

I'm having a small gap in understanding with a project I'm working on. The project is reliability related and requires looking at the absolute maximum values for some 54ALS family logic (Max Vcc, ...
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1answer
25 views

Maximum Vin on load switch ICs

I'm trying to determine whether the absolute maximum rating for Vin on load switch ICs applies for when the switch is both open and closed. When the switch is closed, it makes absolute sense to me ...
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1answer
34 views

If positively biasing amplifier does minimum voltage on input pins apply?

I am using an amplifier to bias a signal for an ADC. The signal range is -1.25 to 1.25 volts. I have the 2.5V precision reference for the ADC through a voltage divider to the inverting input of the ...
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1answer
62 views

Vdg in Mosfet Datasheet

I would like to know why in most of Mosfet Datasheets there are parameters like Maximum Vgs or Maximum Vds but never Vdg, the maximum voltage acceptable between Drain and Gate. Maybe because it's ...
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41 views

Cannot find the maximum ratings for the output current

For the part of a circuit shown below I'm using an LT1007 but couldn't find any information about the maximum current output can sink or source. They have written every tiny detail but the maximum ...
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2answers
305 views

How to determine the current rating of Litz wire winding at high frequency?

How can we determine the current rating of a litz wire winding at high frequency? This is my try: For example, if we use 660/38 litz at 85kHz, we can see the equivalent AWG is 10 (reference). Then, ...
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2answers
55 views

Modifying a buck converter for lower current rating

I have been learning about buck converters and I think I understand the principle of their design. However, I am unsure of how a current rating would be calculated for a particular design. The ...
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1answer
38 views

Amperage discrepancy on computer PSU

I have a 500W PSU that has both 12v and -12v supply rails with the dual +12v rails rated for 360W (20A each) and a single -12v rail rated for 9.6W (0.8A). My question is; if I was to power something ...
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3answers
479 views

Are three-phase contactors rated per pole or in total?

Are three-phase contactors rated per pole or in total? For example, have a look at this datasheet for a random three-phase contactor: datasheet In the datasheet it says that for AC-3 loads (1) the ...
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2answers
32 views

Using an LIS3DH at LiPo Voltages

The LIS3DH 3-axis accelerometer specifies that it's supply voltage should be between 1.71 V and 3.6 V. For most applications, this just means you are using either 1.8 V or 3.3 V as your main rail. ...
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61 views

Is rated current supposed to vary based on voltage?

Recently I have been reading a lot of datasheets and noticed that many manufacturers specify a current rating for their products (especially connectors) without specifying at what voltage the current ...
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1answer
70 views

What is a safe max rated current percentage for a 1A, 5V positive voltage regulator like a 7805?

I have a simple circuit comprised of seven 5V relays and eight 5mm LEDs, if the supply is 5V, it will draw a max of 660mA DC. I was planning to use a 7805 positive voltage regulator rated for 1A, so ...
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1answer
109 views

What is the actual ratings of this limit switch?

I'm going to use this microswitches as the limit cut off for motorized locking system for sliding door of my store room under the stair case. Upon checking it properly, the Indonesian made Omron ...
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2k views

Does the wattage of a resistor factor into the resistance of a resistor?

Resistors come in a variety of different ratings based on wattage. As a rule, lower wattage resistors are smaller than higher wattage resistors. I understand the wattage determines roughly how much ...
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1answer
504 views

What is Maximum Average Forward Rectified Current? (1N4001 Diode)

I am wondering if someone can explain what Maximum Average Forward Rectified Current means for a diode. I see that this is marked as 1 Amp in the datasheet for the 1N4001. I have not been able to find ...
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1answer
116 views

Is it appropriate to use a 300V RMS CAT I rated oscilloscope to measure 230V RMS of a power inverter?

Yesterday I decided to look at the waveform of my portable power inverter. The inverter specs are the following: Input: 12 V DC Output: 230 V RMS Rated power: 300 W I powered my inverter from a ...
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96 views

Use of a connector beyond OEM's voltage rating

I've been looking for some time for a suitable connector for my device, and happened upon a seemingly perfect option. It has the right number of pins, the right mix between signal and power pins, the ...
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2answers
81 views

Can Micro-controller bear the voltage at its pins more than its rated voltage?

I have a micro-controller, for which i have a datasheet specifying the ac/dc characteristics of that mcu. But in this datasheet there are no absolute maximum ratings only the operating conditions are ...
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39 views

How to measure max current of a power supply 2

I have some power supplies of unknown rating. In a short answer from Rafal Powierski in How to measure max current of a power supply "How to measure max current of a power supply" (Since I cannot ...
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44 views

KUKA LBR iiwa Robot_Reducing the carried amperage by merging wires

Based on KUKA IIWA specification I can connect an 8A power supply to X651 (input) which is connected to two outputs (X36 and X32). Each output can provide (Max) 4A. My problem is that I need to power ...
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62 views

How to properly select a transformer in terms of thermal rise

I'm trying to reach a decision selecting a small transformer for a task, from an overseas company (which only significant because of the language barrier). I thought the selection would be easy ...
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1answer
80 views

How do i determine max voltage for a custom BLDC [closed]

I would like to know the process that you would go through to determine the voltage rating on a BLDC. I imagine that it has something to do with how the coils are wrapped and the how many coils there ...
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2answers
41 views

Power ratings for micro JST

I am just trying to figure out the max current which i could expose my new micro JST cables to. It says here that they are rated for 1A and 50V. Converted to power that would be 50W. that sounds very ...
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1answer
72 views

Understanding IC max current in Datasheets

I'm hoping someone can help a noob out here. I've been reading a lot of data sheets of late looking for chips that will work for a small project. In short I need to drive a number of outputs (mainly ...
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2answers
50 views

Can I use a DC power pack (12dcv 3a) with an inline connector rated at 24dcv 2a?

I have a power pack that is 12v 3a, I want to buy an inline switch so it can be turned off without having to unplug it. The following image is of the inline switch. It is rated for 24v at 2amp. If my ...
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1answer
51 views

How do manufacturers rate the voltage of light bulb or any types of load?

How manufacturer make light bulb or switch for a specific voltage? How it is determined that the light bulb will work at the maximum specific voltage?
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36 views

TCXO specification ambiguity

I am going through datasheet of TXKTPCSANF-32.000000. I require a clipped sine-wave TCXO with 1.8 Vpp maximum. However, the datasheet of the TCXO doesn't state the ...
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309 views

What is the maximum charging current of the MAX1737?

I am currently trying to choose a charger IC for Lithium-ion cells batteries and thereby came across the datasheet for the MAX1737: https://datasheets.maximintegrated.com/en/ds/MAX1737.pdf The ...
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3answers
3k views

Max Voltage for Speaker of Given Power Rating

I have been looking into the design of loudspeaker drivers and would like to know how to determine the maximum voltage which can be delivered to a given speaker. From Ohm's law we know that P = V^2 / ...
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1answer
26 views

What will be case if buck regulator (TPS62067) load current increases the rated current?

This is buck regulator I am using for 1.8 V output: TPS62067. Input Voltage = 3.3 V Maximum rated current = 2 A. How the regulator will behaving if the load current increases more than 2 A ? My ...
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1answer
230 views

Why do manufacturers strongly discourage using X7R capacitors in AC signal and mains filtering applications?

Recently I've seen notes in datasheets from capacitor manufacturers Kemet and AVX that recommend designers not use X7R capacitors for applications in which they will be placed across mains or used for ...
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11k views

Are LEDs better than we think?

Conventional wisdom about LEDs says their maximum reverse voltage \$V_{R(max)}\$ is quite limited, usually in the 5V-8V range. So, for experimentation purposes, I wanted to bring an LED into ...
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0answers
53 views

Calculating max peak current at different conditions

I have an IR LED (IR383), and I want to power it with 5v@38KHz. I'm actually calculating the resistor so I need the LED's maximum current. In the datasheet, it says that it accepts 100mA continuous ...
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1answer
89 views

Absolute maximum ratings interpretation

I have a datasheet of a CD74HCT86E XOR gate. Under Absolute Maximum Ratings, it says DC Output Source or Sink Current per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . ....
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2answers
206 views

How do I know what power rating pots need?

EE novice here. In this post on reddit, the author wonders if 125mW-rated potentiometers are usable in the MFOS Noise Toaster. The Noise Toaster drives analog audio circuitry off a single 9V battery ...
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2answers
457 views

What determines the continous ratings of electric motors?

I've seen variations of this torque-speed curve for brushless DC motor performance, and I'm curious what criteria determine the rated torque and speed of permanent magnet DC motors in general. Does ...
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3answers
918 views

I/O voltage slightly greater than VCC

I'm trying to perform communication with a Motorola MPC5606B microcontroller using a cable that I already had previously. Using this cable will make things easier in my lab because everyone has one ...
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4answers
232 views

Effect of switching spikes (400ns duration) on capacitor rated voltage

I have a motor drive which uses 63V electrolytic capacitors, which are the part with lowest-rated voltage on the drive's DC link. I measured the switching spikes on the DC link voltage (carefully, ...
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1answer
316 views

Switch Current Rating - Current Maximum

I've searched through a lot of threads regarding this and found some answers, however, the data sheet I am provided has some information which is causing some confusion. I have a switch with the ...
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3answers
106 views

Characterization of RF Amplifier Chain

I am using a 3 Amplifiers chain for a Receiver system. The required Output is -32dBm while the sensitivity of the system is -55 dBm, I am able to achieve this. But the maximum I/P power for the ...
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1answer
101 views

Is there any way to calculate the voltage & current rating on an unmarked component?

I just acquired an assortment of electronic components, many of which either have no way of identifying ratings at all (ie resistors) and some ie (transistors) where there has either been no printed ...
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1answer
350 views

Inductor Inrush Current Rating

I am experimenting with the simple circuit shown below and was wondering how to ensure that the inductor used would handle the inrush current. My reasoned solution is the following: I solved for ...
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1answer
257 views

Is maximum BJT VEBO rating exceeded in this miller effect compensation circuit?

I have an switching circuit containing a transistor to switch the inductive load. There is a miller effect compensation capacitor (C1) in parallel with a base resistor. (The values of the two ...
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2answers
257 views

How to guess voltage ratings and current ratings in capacitor and inductor?

I have a list of values of capacitors and i also know their material types! But i don't know how to figure out their voltage rating? "Ratings have been removed in the capacitors for this purpose" ...
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48 views

employing a series resistor to mitigate an absolute maximum voltage rating

I am trying to run an IC with an absolute maximum voltage spec of 3.6 V. The linear voltage regulator that feeds the whole board specifies a maximum output voltage of 3.63 V. For a given input current ...
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1answer
2k views

Do FETs have a Maximum Gate-Drain voltage?

I know FETs have a Absolute max \$|V_{gs}|\$, and a max \$V_{ds}\$. So can we assume, say for an N type, that: $$\text{max}|V_{gd}| = V_{ds} + |V_{gs}|\\$$