AA4040YS

LED Indication - Discrete Overview

The AA4040YS is a single-color yellow surface-mount LED manufactured by Kingbright. It features a PLCC-2 package with dimensions of 4 mm height, 3.6 mm length, and 4 mm width. The component emits light at a peak wavelength of 588 nm with a water clear dome lens. Electrical characteristics include a forward current of 20 mA, a forward voltage of 2.1 V, and a power rating of 75 mW. Optical performance specifies an intensity of 15 mcd and a viewing angle of 120 degrees. It operates within a temperature range of -40°C to +85°C.

LED Indication - Discrete Feature Summary

• Yellow emission with water clear dome lens for high visibility
• Standard PLCC-2 SMD package for automated assembly
• Wide viewing angle for broad indicator applications

LED Indication - Discrete Applications

• Panel status indicators
• Equipment power indicators
• Control board signaling

LED Indication - Discrete Procurement Notes

Verify the specific datasheet version for the AA4040YS to confirm RoHS compliance details and moisture sensitivity level prior to ordering. Ensure that the supplier documentation matches the manufacturer's official specifications for electrical parameters and physical dimensions. Cross-reference the Mouser number 604-AA4040YS or Kingbright part number KA-4040YS if applicable to confirm exact component identity.

LED Indication - Discrete Selection Notes

Select this component when a standard yellow indication is required in a compact PLCC-2 footprint. Consider the 15 mcd intensity suitable for general panel visibility rather than high-brightness requirements. Verify compatibility with the target circuit's forward voltage of 2.1 V at 20 mA. Ensure the operating environment stays within the specified -40°C to +85°C range.

LED Indication - Discrete Part Context

This component belongs to the Kingbright AA4040 series of single-color LEDs. The series utilizes a standard PLCC-2 form factor widely adopted in surface mount technology. Other variants in this family offer different colors such as red, green, and orange, sharing similar mechanical dimensions but varying in optical output and electrical characteristics.

LED Indication - Discrete Replacement Considerations

The part number alias KA-4040YS represents the same component. When sourcing substitutes, verify that the replacement maintains the PLCC-2 package, 588 nm wavelength, and compatible forward voltage to ensure direct fitment without circuit modification.