# Quick Answer: What Is The Max Voltage For An LED?

## What is the maximum voltage a LED can withstand?

about 3.0 voltsThe maximum voltage applied it a single white LED is about 3.0 volts.

Several LEDs in series can match a higher voltage supply, or a resistor (or other current limiting circuit) can be used to limit the current..

## Can high voltage damage LED lights?

The reason why a power-line has high voltage and low current is that power-lines are super long, which increases its resistance. … LEDs have a tolerance of a specific amount of reverse voltage that it can withstand but once this is exceeded, the LED can be damaged.

## Is 9v too much for an LED?

A 9V battery can’t supply very much current, but without series resistor the current may still be too much for the LEDs. … In theory you could do without resistor, but the LEDs are never exactly 4.5V and your battery is never exactly 9V.

## What resistor do I need for LED 12v?

For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/. 010=860 ohms. To use several LEDs in parallel, sum the current values.

## How do I know what voltage my LED is?

How to find voltage and current of LEDThe easiest way is to look it up in the datasheet.You could find the LED voltage by using a multimeter with diode function.You could connect a battery to the LED and a potentiometer. Start with a high resistance on the potentiometer and gradually decrease it until you have an nice brightness.

## What voltage can an LED take?

Typically, the forward voltage of an LED is between 1.8 and 3.3 volts. It varies by the color of the LED. A red LED typically drops around 1.7 to 2.0 volts, but since both voltage drop and light frequency increase with band gap, a blue LED may drop around 3 to 3.3 volts.

## What happens if you put too much voltage through an LED?

The answer to your title question is: The LED will light up. … Too much current will blow the LED. You limit the current to your desired value (often 15 to 20mA) by putting the correct resistance into the circuit. Use Ohm’s law to work that out.

## How many LEDs can a 12v battery power?

The answer should be the source voltage divided by the voltage drop of 1 LED. So if your source is 12v, and your LEDs have a voltage drop of 3.5, 12/3.5v, gives you 3 LEDs. If the the forward voltage drop of the LEDs was exactly 3 volts, you’d be able to drive 4 of them, and would not need a current limiting resistor.

## How do I protect my led from High Voltage?

A metal oxide varistor (MOV) placed across the input helps to provide overvoltage protection in the LED module. The device may also be placed after the MOV. Many equipment manufacturers prefer protection circuits combining resettable overcurrent protection devices with upstream fail-safe protection.

## Does voltage matter for LED?

does the supply voltage matter, as long as the correctly calculated current limiting resistor value is used? No. … The voltage at the LED itself will be the diode’s voltage drop, which will depend a little on the current through the diode, but mostly on the composition of the diode.

## Are LEDs voltage sensitive?

LEDs are current-sensitive devices. However, although slight changes in current, such as the 5% mentioned above, do not affect LEDs nearly as much as similar changes in voltage affect filaments in bulbs, it is still important that designers consider transient peak currents when implementing LED driver circuits.

## Will low voltage damage LED lights?

Underdriving will not damage the LED, in fact will increase its lifetime. One cannot underdrive an LED with too low of a voltage, since the LED will simply give off no light if the voltage is too low. (The difference in voltage needed for lowering the light output is very small.

## Do LEDs get brighter with more voltage?

Adjusting the voltage lower or higher will change the brightness, but only because it also changes the current- higher voltage means the current will increase in an LED.

## What is reverse voltage in LED?

LED Basics The “Forward Voltage” rating of a diode will determine the minimum voltage difference between the anode and cathode to allow current to flow. … However, reversing the voltages to apply 0 volts to the anode and +1V to the cathode, prevents current from flowing!