Equivalent & Substitute Parts for AA4040CGSK

Part Overview

The AA4040CGSK is an active green LED indication component manufactured by Kingbright, designed for surface mount right-angle applications. This 2-SMD boomerang package LED operates at 2.1V forward voltage with a 90mcd brightness rating and 570nm dominant wavelength. The component is ROHS3 compliant and maintains active product status with 3200 units in current inventory. Substitute parts are identified to address inventory availability, lead time requirements, or specific application performance parameters while maintaining mechanical and electrical compatibility within defined tolerance ranges.

Substiute Parts

AA4040CGSK

KingbrightIn Stock: 3285AA4040CGSK Datasheet

Current PartRFQ

SML-LXR44SUGC-TR

Lumex Opto/Components Inc.In Stock: 29319SML-LXR44SUGC-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AA4040CGSK is determined by strict alignment with the following critical parameters:

Mechanical Compatibility Requirements:

• Package type must be 2-SMD, Boomerang configuration
• Mounting type must be Surface Mount, Right Angle
• Lens size must be 2.40mm diameter
• Overall dimensions must be 4.00mm L x 3.60mm W
• Maximum height must not exceed 4.00mm

Optical Requirements:

• Color must be Green
• Lens transparency must be Clear
• Peak wavelength must be 574nm

Electrical Compatibility:

• Forward voltage (Vf) must be within acceptable circuit design range (2.1V to 2.2V typical)
• Test current specification of 20mA establishes operating condition reference

Regulatory and Compliance:

• RoHS3 compliance is mandatory
• Moisture Sensitivity Level must be MSL 3 or lower
• REACH unaffected status required

The substitute part SML-LXR44SUGC-TR meets all critical mechanical, optical, and regulatory requirements. Variations in millicandela rating (210mcd vs 90mcd) and viewing angle (90° vs 120°) represent performance enhancements rather than incompatibilities, as these parameters do not affect physical or electrical substitutability.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

The AA4040CGSK remains the specified component when original manufacturer continuity and exact performance parameters are required. Kingbright maintains active product status with 3200 units in current inventory, ensuring supply chain stability.

Substitution Conditions:

The SML-LXR44SUGC-TR (Lumex) is electrically and mechanically interchangeable with the AA4040CGSK. Both components are ROHS3 compliant, carry identical MSL ratings, and share identical mechanical footprints and mounting characteristics. The 0.1V forward voltage difference (2.2V vs 2.1V) falls within typical circuit design tolerance ranges for LED indication applications and does not constitute an incompatibility.

Performance Considerations:

The Lumex substitute provides increased brightness (210mcd vs 90mcd) and operates within a narrower viewing angle (90° vs 120°). These characteristics represent performance enhancements for applications requiring higher luminous intensity or more directional light output. Applications with existing brightness or viewing angle constraints should evaluate whether these differences align with circuit requirements.

Compliance Status:

Both components maintain identical regulatory compliance: ROHS3 compliant, REACH unaffected, and EAR99 classification. No compliance barriers exist for substitution.

Frequently Asked Questions (FAQ)

Q: Can SML-LXR44SUGC-TR be used as a direct replacement for AA4040CGSK on existing PCBs?

A: Yes. Both components share identical mechanical dimensions (4.00mm L x 3.60mm W x 4.00mm H max), lens size (2.40mm diameter), and 2-SMD boomerang package configuration. PCB footprints are compatible without modification.

Q: What is the significance of the 0.1V forward voltage difference?

A: The AA4040CGSK operates at 2.1V typical forward voltage while the SML-LXR44SUGC-TR operates at 2.2V typical. This 0.1V difference is within standard LED circuit design tolerance and does not require circuit redesign for typical indication applications operating at 20mA test current.

Q: How do the brightness ratings differ between these parts?

A: The AA4040CGSK is rated at 90mcd while the SML-LXR44SUGC-TR is rated at 210mcd at 20mA test current. The Lumex substitute provides approximately 2.3 times greater luminous intensity. Applications with specific brightness requirements should confirm whether increased output is acceptable or requires current limiting adjustment.

Q: What is the difference in viewing angle specifications?

A: The AA4040CGSK has a 120° viewing angle while the SML-LXR44SUGC-TR has a 90° viewing angle. The Lumex substitute provides more directional light output. Applications requiring wide-angle light distribution should confirm that the narrower 90° angle meets visibility requirements.

Q: Are both components suitable for the same environmental conditions?

A: Yes. Both components carry identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours), indicating equivalent handling and storage requirements. Both are ROHS3 compliant and REACH unaffected.

Q: Which component should be selected for new designs?

A: Component selection depends on application-specific requirements. The AA4040CGSK is appropriate when exact brightness and viewing angle specifications are critical. The SML-LXR44SUGC-TR is appropriate when higher brightness or more directional output provides design advantages. Both are active products with established supply chains.

Q: Are there any package or assembly differences?

A: No. Both components use identical 2-SMD boomerang package configuration and surface mount right-angle mounting type. Assembly processes and equipment compatibility are identical.