Equivalent & Substitute Parts for AA4040SGC

Part Overview

The AA4040SGC is an active, surface-mount right-angle green LED indicator manufactured by Kingbright. This component is a 2-SMD boomerang-style LED with a clear lens, designed for discrete indication applications. The part operates at 2.2V forward voltage with a 20mA test current and delivers 25 millicandela luminous intensity at a 90-degree viewing angle. Substitute parts are identified to address inventory availability, extended lead times, or specific application requirements while maintaining electrical and mechanical compatibility within defined parameter tolerances.

Substiute Parts

AA4040SGC

KingbrightIn Stock: 3469AA4040SGC Datasheet

Current PartRFQ

AA4040SGS

KingbrightIn Stock: 1184AA4040SGS Datasheet

DirectRFQ

SML-LXR44GC-TR

Lumex Opto/Components Inc.In Stock: 2494SML-LXR44GC-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AA4040SGC are qualified based on strict alignment with critical electrical and mechanical parameters. The substitution logic is structured as follows:

Critical Parameters (Must Match Exactly):

• Color: Green
• Lens Transparency: Clear
• Voltage - Forward (Vf) Typical: 2.2V
• Current - Test: 20mA
• Mounting Type: Surface Mount, Right Angle
• Package / Case: 2-SMD, Boomerang
• Size / Dimension: 4.00mm L x 3.60mm W
• Height (Max): 4.00mm

Important Parameters (Must Be Compatible):

• Wavelength - Peak: 565nm (acceptable range for green indication)
• Lens Size: 2.40mm Dia
• RoHS Status: ROHS3 Compliant

Application-Dependent Parameters (May Vary Within Limits):

• Millicandela Rating: 25mcd baseline; higher values acceptable if circuit design permits
• Viewing Angle: 90° baseline; wider angles acceptable for broader visibility requirements
• Moisture Sensitivity Level (MSL): 4 (72 Hours) baseline; lower MSL values (higher moisture resistance) acceptable

All substitute parts listed maintain active product status and REACH unaffected compliance.

Parameter Comparison

Engineering Selection Recommendations

AA4040SGS (Kingbright): This substitute is electrically and mechanically identical to the AA4040SGC with two notable variations. The millicandela rating is increased to 30mcd, providing 20% higher luminous intensity. The viewing angle is expanded to 120 degrees, offering a wider visibility cone compared to the 90-degree baseline. The moisture sensitivity level is improved to MSL 3 (168 Hours), providing extended moisture resistance during storage and handling. This part is suitable for applications where increased brightness or wider viewing angle is beneficial and the circuit design accommodates the higher luminous intensity. All regulatory compliance certifications remain equivalent.

SML-LXR44GC-TR (Lumex Opto/Components Inc.): This substitute maintains identical electrical characteristics and physical dimensions to the AA4040SGC. The millicandela rating and viewing angle match the baseline specifications exactly. The moisture sensitivity level is equivalent at MSL 4 (72 Hours). This part represents a cross-manufacturer alternative from Lumex Opto/Components Inc., maintaining full ROHS3 compliance and REACH unaffected status. Selection of this substitute is appropriate when Kingbright supply is constrained and Lumex Opto/Components Inc. inventory is available, with no performance trade-offs relative to the original specification.

Frequently Asked Questions (FAQ)

Q: Can AA4040SGS be used as a direct replacement for AA4040SGC?

A: Yes. The AA4040SGS is electrically and mechanically compatible. The primary differences are increased brightness (30mcd versus 25mcd) and wider viewing angle (120° versus 90°). These variations are acceptable in most applications. The improved moisture sensitivity (MSL 3 versus MSL 4) provides additional handling margin. Verify that the circuit design can accommodate the higher luminous intensity if brightness is a concern.

Q: What is the difference between AA4040SGC and SML-LXR44GC-TR?

A: Both parts share identical electrical specifications (2.2V forward voltage, 20mA test current) and physical dimensions (4.00mm L x 3.60mm W, 4.00mm height). The primary difference is the manufacturer: Kingbright versus Lumex Opto/Components Inc. The SML-LXR44GC-TR maintains the same brightness (25mcd) and viewing angle (90°) as the AA4040SGC. This is a true cross-manufacturer equivalent suitable for supply chain diversification.

Q: Are all three parts interchangeable on the same PCB?

A: Yes. All three parts share identical mounting type (Surface Mount, Right Angle), package style (2-SMD, Boomerang), and physical dimensions (4.00mm L x 3.60mm W, 4.00mm maximum height). PCB footprints and placement are identical. No design modifications are required for substitution.

Q: Does the higher millicandela rating of AA4040SGS affect circuit design?

A: The AA4040SGS operates at the same forward voltage (2.2V) and test current (20mA) as the AA4040SGC. The increased brightness (30mcd versus 25mcd) results from improved LED die efficiency, not from higher operating current. Existing current-limiting resistor values remain valid. However, if the application is light-sensitive or requires precise brightness matching, the increased intensity should be considered.

Q: What is the significance of the viewing angle difference?

A: The AA4040SGC and SML-LXR44GC-TR both feature 90-degree viewing angles, providing a standard cone of visibility. The AA4040SGS offers a 120-degree viewing angle, expanding the horizontal and vertical visibility range. For applications requiring visibility from wider angles, the AA4040SGS is advantageous. For applications with specific directional requirements, the 90-degree angle may be preferred.

Q: How does moisture sensitivity level (MSL) affect part selection?

A: MSL rating indicates moisture absorption resistance during storage. The AA4040SGC and SML-LXR44GC-TR are rated MSL 4 (72 Hours), requiring baking before reflow if exposed to moisture for extended periods. The AA4040SGS is rated MSL 3 (168 Hours), providing extended moisture resistance and reduced baking requirements. For high-volume production or extended storage, the AA4040SGS offers operational convenience.

Q: Are all parts ROHS3 compliant?

A: Yes. All three parts (AA4040SGC, AA4040SGS, and SML-LXR44GC-TR) are ROHS3 compliant and REACH unaffected. They meet all applicable environmental and regulatory requirements for commercial and industrial applications.

Q: What is the wavelength specification, and why does it matter?

A: The peak wavelength for all parts is 565nm, which defines the green spectrum. The AA4040SGC specifies a dominant wavelength of 568nm, while the SML-LXR44GC-TR does not specify dominant wavelength. The peak wavelength of 565nm is the controlling specification for color matching and is identical across all parts. This ensures consistent green indication across all three substitutes.