# 2 ohm 1/2 watt 5% Resistor - Replacement

Thanks,

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How it Works »New Instructable »I'm trying to find what 2 resistors I could use in parallel to replace a single 2 ohm 1/2 watt 5% resistor. E24 series. Red/Black/Gold/Gold

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Also some resistors a carbon composite and others are metal or carbon film.

If the size is the same and the measured resistance by ohmeter is the same

it should work.

I don't remember you telling us what the board does ?

Two identical resistors in parallel will be half the resistance.

So what value divided by two results in

2 Ohmsand since the 1/2 Watt is now distributed across two identical resistors

they are only 1/4 Watt each.

_{Four ohms 1/4 W in parallel with another four ohms 1/4 W is two ohms at a 1/2 watt..}:¬oYou want to ether replace the 2 ohm with a 2 ohm or you want to take out the other 2 ohm and install three 3 ohm 1/2 watt resistors.

Orange for 3 Black for 0 Gold for multiply by 0.1 and Gold for 5% tolerance 1/2 watt.

You started with two 2 ohm 1/2 watt resistors in parallel making the circuit 1 ohm 1 watt.

You could also use one 1 ohm 1 watt 1 or 2% tolerance.

Brown for 1 Black for 0 Gold for multiply by 0.1 and Brown for 1% tolerance or Red for 2% 1 watt.

An odd thing happens when you parallel resistors they get more precise, manufactures do it because precise resistors are expensive.

By the way a short cut to calculating resistors in parallel of the same value is to take the value of one of the resistors and divide it by the number of resistors.

Joe

Red for 2 Black for 0 Gold for multiply by 0.1 and Gold for 5% tolerance.

To put two in parallel and get the same impedance you double your resistance and half the wattage so you want two 4 ohm 1/4 watt 5% tolerance resistors.

Yellow for 4 Black for 0 Gold for multiply by 0.1 and Gold for 5% tolerance.

2, Yellow, Black, Gold, Gold, 1/4 watt 5% tolerance resistors.

Joe

Thanks