Current Limiter Resistor Calculator

Calculate Current Limiting Resistor





Formula

The formula to calculate the value of a current limiting resistor is:

\[ R = \frac{V - V_f}{I_f} \]

Where:

What is a Current Limiter Resistor?

A Current Limiter Resistor is a component used in electrical circuits to control or limit the amount of current flowing through the circuit. It works by providing a specific amount of resistance, which in turn reduces the current to a safe level. This is crucial in preventing damage to sensitive components within the circuit that may not be able to handle high levels of current. The value of the resistor is chosen based on the desired current limit and the voltage across it.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ R = \frac{12 - 2}{0.02} = 500 \text{ Ohms} \]

The current limiting resistor value is 500 Ohms.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ R = \frac{9 - 1.5}{0.015} = 500 \text{ Ohms} \]

The current limiting resistor value is 500 Ohms.