C77 0.5 Ohm (0R5) Metal Film Resistor - 1/2 Watt (4PCS)

This is a 0.5 Ohm high-precision resistor. Resistors with such low values are often used as "shunt" resistors for current sensing or in power supply circuits where minimal voltage drop is required.

Product Specifications

Color Code Breakdown

This is a 5-band resistor, which allows for higher precision:

1. 1st Band (Black): 0

2. 2nd Band (Green): 5

3. 3rd Band (Silver): Multiplier (10−2 or 0.01)

4. 4th Band (Gold): Tolerance ($\pm 5\%$) — Note: In some high-precision series, the final blue band indicates a tighter tolerance of $\pm 0.25\%$.

Calculation: $05\times 0.01=0.5\mathbf{\Omega }$

Key Features

• Low Resistance: Ideal for measuring current by monitoring the small voltage drop across the component.

• Metal Film Construction: Offers superior temperature stability compared to standard carbon film resistors.

• Compact Design: Fits easily into PCB layouts for power management modules.

Common Applications

• Current Sensing: Used in battery chargers and motor controllers to monitor power consumption.

• Voltage Regulation: Acts as a feedback component in switching power supplies.

• Audio Amplifiers: Frequently found in the output stages of high-fidelity audio equipment.

• Protection Circuits: Can act as a fusable element in specific low-power applications.