AA3020ASRC Equivalent & Substitute Parts

Part Overview

The AA3020ASRC is a red LED indication component manufactured by Kingbright, configured as a 2-SMD J-Lead surface mount device. This part features a 640nm dominant wavelength with 120mcd brightness rating and operates at 1.85V forward voltage. The AA3020ASRC is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across optical, electrical, and mechanical parameters while meeting current supply chain availability.

Substiute Parts

AA3020ASRC

KingbrightIn Stock: 1192AA3020ASRC Datasheet

Current PartRFQ

AA3021SURSK

KingbrightIn Stock: 11022AA3021SURSK Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute identification for the AA3020ASRC is based on the following allowable parameter tolerances and compatibility criteria:

Critical Matching Parameters:

• Color: Red (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 2-SMD, J-Lead (exact match required)
• PCB Footprint: 2.70mm L x 2.00mm W (exact match required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Allowable Variation Parameters:

• Wavelength - Dominant: Red spectrum range (630nm to 660nm acceptable for red indication applications)
• Voltage - Forward (Vf): ±0.10V tolerance (1.75V to 1.95V acceptable)
• Millicandela Rating: ±30% variation acceptable for indication applications
• Viewing Angle: ±35° variation acceptable
• Height (Max): ±0.15mm variation acceptable for clearance
• Moisture Sensitivity Level: Equal or lower MSL value acceptable

The AA3021SURSK qualifies as a substitute based on these criteria, maintaining identical mounting configuration, footprint, and compliance status while operating within acceptable electrical and optical parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AA3021SURSK

The AA3021SURSK is the qualified substitute for the obsolete AA3020ASRC. Selection rationale is based on the following engineering factors:

Compliance & Availability:

• AA3021SURSK maintains active product status with 10,948 units in stock, compared to the obsolete AA3020ASRC with limited remaining inventory
• Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Both components carry identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications

Electrical Compatibility:

• Forward voltage differential of +0.10V (1.85V to 1.95V) falls within acceptable circuit design tolerance for LED indication applications
• Test current specification remains constant at 20mA, ensuring equivalent power dissipation characteristics
• Wavelength shift from 640nm to 630nm remains within the red spectrum range for indication purposes

Mechanical & Optical Compatibility:

• Identical footprint (2.70mm L x 2.00mm W) and package configuration (2-SMD, J-Lead) ensure direct PCB layout compatibility
• Height reduction of 0.15mm improves clearance margins without creating assembly conflicts
• Brightness reduction of 25% (120mcd to 90mcd) is acceptable for indication applications; viewing angle expansion to 125° provides improved visibility distribution
• Improved moisture sensitivity level (MSL 3 vs. MSL 4) enhances storage and handling reliability

Recommendation: Direct substitution of AA3021SURSK for AA3020ASRC is supported for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q: Can AA3021SURSK be used as a direct replacement for AA3020ASRC in existing PCB designs?

A: Yes. The AA3021SURSK maintains identical footprint dimensions (2.70mm L x 2.00mm W) and package configuration (2-SMD, J-Lead), enabling direct PCB layout compatibility without design modifications. No trace routing or pad repositioning is required.

Q: What is the impact of the 10nm wavelength shift from 640nm to 630nm?

A: Both wavelengths fall within the red spectrum range for LED indication applications. The 640nm to 630nm shift represents a 1.6% change in dominant wavelength and does not alter the perceived color for human visual indication purposes. Peak wavelength shifts from 660nm to 645nm, a 2.3% change, which is within acceptable optical performance parameters.

Q: How does the 25% brightness reduction (120mcd to 90mcd) affect circuit design?

A: The brightness reduction is offset by the expanded viewing angle (90° to 125°), resulting in improved visibility distribution across a wider spatial range. For indication applications, the 90mcd brightness level remains sufficient for standard visual feedback. If maximum brightness is a critical requirement, circuit design modifications may be necessary; however, this is not a typical constraint for indication LEDs.

Q: Is the +0.10V forward voltage increase problematic for circuit compatibility?

A: No. The forward voltage increase from 1.85V to 1.95V represents a 5.4% change and falls within standard LED circuit design tolerance. Current-limiting resistor values may require minor adjustment to maintain precise 20mA test current, but this is a routine design parameter optimization and does not prevent substitution.

Q: What is the significance of the improved MSL rating (MSL 3 vs. MSL 4)?

A: The AA3021SURSK carries MSL 3 (168 hours) compared to AA3020ASRC MSL 4 (72 hours), indicating improved moisture resistance and extended shelf life. This improvement reduces risk during storage and handling, particularly in humid environments. No negative impact results from this specification improvement.

Q: Are there any packaging differences between the two parts?

A: The AA3020ASRC is supplied in standard packaging (-), while AA3021SURSK is supplied in Tape & Reel (TR) format. Both maintain identical component specifications and footprints. Tape & Reel packaging is standard for high-volume surface mount assembly and does not affect component performance or compatibility.

Q: Can the AA3021SURSK be used in applications requiring the exact 640nm wavelength specification?

A: No. If the application requires strict adherence to 640nm dominant wavelength specification, the AA3021SURSK (630nm) does not meet this requirement. In such cases, alternative red LED components with 640nm specification must be sourced. However, for standard indication applications where red spectrum compliance is sufficient, the 630nm wavelength is acceptable.