156120RS75000

Overview

The Würth Elektronik 156120RS75000 is a single-color surface-mount LED from the WL-SMRW series, designed for bottom entry installation. It emits red light with a peak wavelength of 632 nm and a dominant wavelength of 624 nm. The component features a rectangular lens with a flat top, housed in a 1206 (3216 metric) package measuring 3.20 mm in length, 1.60 mm in width, and a maximum height of 1.40 mm. Electrical characteristics include a typical forward voltage of 2 V at a test current of 20 mA, resulting in a power rating of 48 mW. The device provides an optical intensity of 60 mcd and offers a wide viewing angle of 140 degrees.

Feature Summary

• Bottom entry configuration facilitates specific PCB layout requirements
• Wide 140-degree viewing angle ensures broad visibility
• Rectangular lens with flat top design for uniform light distribution

Applications

• General purpose indicator lighting on electronic circuit boards
• Status indication in consumer electronics devices
• Control panel illumination for industrial equipment

Procurement Notes

Verify the exact ordering suffix to confirm the specific wavelength and luminous intensity variant, as the base part number may correspond to multiple optical configurations within the WL-SMRW family. Confirm moisture sensitivity level (MSL 3) compliance and reflow soldering profile requirements prior to assembly. Ensure that the bottom entry terminal style matches the target footprint design to prevent mounting errors during production.

Selection Notes

Select this component when a standard 1206 footprint is required alongside a bottom entry terminal style rather than side terminals. Consider the 140-degree viewing angle suitable for applications requiring wide-area visibility. Evaluate the 2 V forward voltage drop against the system supply rail to determine appropriate current-limiting resistor values. Verify that the 60 mcd intensity meets the ambient light conditions of the intended enclosure.

Part Context

This component belongs to the Würth Elektronik WL-SMRW series of surface-mount LEDs. The series offers various colors and intensities within the 1206 package form factor. The 156120RS75000 specifically addresses the need for red indicators with bottom-entry contacts, distinguishing it from side-entry variants like the 156120VS series or dome-lens versions.

Replacement Considerations

Direct substitutes within the same manufacturer line include other WL-SMRW variants such as 156120BS75000 for blue or 156120VS75000 for green, provided the bottom entry interface is maintained. Cross-manufacturer replacements must match the 3.2 x 1.6 mm outline, 1.4 mm max height, and bottom-terminal pin configuration to ensure mechanical compatibility.