3mm Three Hole LED Indicator

3mm Three Hole LED Indicator is designed for equipment builders that need a compact and repeatable LED status display on the same PCB. The integrated black housing keeps the 3 led positions aligned, improves visual contrast on the front panel and reduces the mechanical variation that can occur when separate indicator lamps are mounted one by one. This makes the component useful for overseas OEM projects where clear appearance, stable assembly and consistent operator visibility are important.

The product uses a 15.3*4.45*8.9 housing and 3mm LED lamp positions with IF=20mA reference current. The available color range covers Red+Red+Yellow, Red+Red+Green, Red+Red+Blue, Red+Green+Blue, giving engineers practical choices for power, run, fault, communication, alarm, mode and service indication. Red and yellow are commonly used for warning or alarm states, green is widely used for normal operation, and blue or purple can be selected for special equipment logic or brand-specific signal design.

In industrial control panels and PLC systems, a grouped LED indicator array helps maintenance teams read equipment status quickly. It can be placed near terminal blocks, switch interfaces, communication ports or diagnostic labels to show channel state without requiring a large separate display. For power distribution cabinets and telecommunications equipment, the compact array format supports dense layouts while keeping the front view organized and easy to inspect during installation, service and field troubleshooting.

From an engineering perspective, the main selection points are package size, color combination, wavelength, luminous intensity, forward voltage, viewing angle and packaging method. The specification table below converts the supplied KINGBRIGHT source data into an HTML table so purchasing teams and engineers can compare the options directly. The 10-90 deg viewing angle range is suitable for typical panel viewing distances, while the black housing helps separate each signal position visually.

KINGBRIGHT can support quotation, sample confirmation, brightness discussion and OEM customization review for LED indicator array projects. If your equipment requires a specific LED order, customized color logic, special brightness range, PCB integration support or export packing requirement, please share your drawing, circuit condition, target quantity and application environment. Our sales engineer can help confirm the best indicator configuration before prototype and mass production.