AA4040QBS/D

Overview

The Kingbright AA4040QBS/D is a single-color blue surface-mount LED belonging to the KA-4040 series. It features a rectangular lens with dimensions of 4.0 x 4.0 mm and a water-clear, dome-shaped cover. The component emits light at a peak wavelength of 460 nm or 470 nm, depending on specific binning. Electrical characteristics include a forward voltage of 3.3 V at a test current of 20 mA, with a maximum power dissipation of 120 mW. The device offers a viewing angle of 120 degrees and provides an optical intensity ranging from 150 to 220 mcd. It operates within a temperature range of -40 °C to +85 °C.

Feature Summary

• Utilizes a compact 4.0 x 4.0 mm PLCC-2 package for dense circuit board layouts
• Features a water-clear dome lens to optimize light transmission and viewing angles
• Designed for high reliability with RoHS compliance and moisture sensitivity handling

Applications

• Indicator lights in consumer electronics
• Status displays in industrial control panels
• Backlighting for membrane switches
• General purpose illumination in automotive interiors

Procurement Notes

Verify the exact peak wavelength (460 nm vs 470 nm) and luminous intensity bin during procurement, as these parameters vary by manufacturing lot. Confirm moisture sensitivity level requirements for storage and reflow soldering processes. Ensure the ordering suffix matches the desired packaging format, such as tape and reel or cut tape, to align with automated assembly equipment specifications.

Selection Notes

Select this component when a standard blue SMD LED with a 120-degree viewing angle is required. Consider the 3.3 V forward voltage drop for driver circuit design. Evaluate the 150–220 mcd brightness range against visibility needs. Check thermal management capabilities given the 120 mW power rating. Compare against alternative wavelengths if color consistency across assemblies is critical.

Part Context

This part belongs to the Kingbright KA-4040 series, which represents a generation of surface-mount LEDs designed for improved material durability and electrical reliability. The series supports various colors and intensities within a standardized 4x4 mm footprint, facilitating easy integration into modern electronic designs requiring compact form factors.

Replacement Considerations

Direct substitutes may include other Kingbright parts within the same 4x4 mm PLCC-2 family, such as the AA4040QBS/D-AMT, provided wavelength and intensity bins are compatible. Verify pinout compatibility and physical dimensions before substitution.