The 330Ω resistor is a popular choice for limiting current through standard red and green LEDs when driven from a 5V supply. The typical forward voltage of a red LED is about 2V, so (5V - 2V) / 330Ω = 9mA — a safe, visible brightness without exceeding most LED maximum ratings. Beyond LEDs, 330Ω appears in pull-up networks for I²C buses running at 3.3V (where 330Ω is a strong pull-up) and as damping resistors for clock lines. The QUADRIOS 22P044 provides 100 pieces of precision 330Ω metal film resistors.

Key Specifications

The 1% tolerance ensures that the actual LED current stays within a narrow range, producing consistent brightness across multiple indicators. The 0.25W rating allows continuous current up to 27.5mA, well above the typical 10-20mA used for LEDs.

Mechanical and Application Notes

Axial leaded, 6 mm body length, 2.3 mm diameter. Compatible with breadboards, perforated boards, and PCB through-holes. Easy to hand-solder and desolder, making them suitable for prototyping and low-volume production. The bag contains 100 pieces.