AA3528ASGC Equivalent & Substitute Parts

Part Overview

The AA3528ASGC is a green surface-mount LED indicator manufactured by Kingbright, featuring a 2.40mm diameter round lens with flat top in a 2-PLCC package. This component operates at 2.2V forward voltage with a 25mcd brightness rating and 568nm dominant wavelength, designed for discrete LED indication applications. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

AA3528ASGC

KingbrightIn Stock: 1155AA3528ASGC Datasheet

Current PartRFQ

AA3528SGS

KingbrightIn Stock: 15242AA3528SGS Datasheet

Parametric EquivalentRFQ

SML-Z14M4TT86

Rohm SemiconductorIn Stock: 4227SML-Z14M4TT86 Datasheet

SimilarRFQ

SML-Z14MTT86A

Rohm SemiconductorIn Stock: 3116SML-Z14MTT86A Datasheet

SimilarRFQ

QBLP670-YG1

QT Brightek (QTB)In Stock: 2823QBLP670-YG1 Datasheet

Parametric EquivalentRFQ

SML-LX2832GC-TR

Lumex Opto/Components Inc.In Stock: 3266SML-LX2832GC-TR Datasheet

Parametric EquivalentRFQ

SML-LX2832SGC-TR

Lumex Opto/Components Inc.In Stock: 1170SML-LX2832SGC-TR Datasheet

Parametric EquivalentRFQ

VFHG1104LS-TR

Stanley Electric CoIn Stock: 1198VFHG1104LS-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AA3528ASGC is determined by strict alignment of the following critical parameters:

Mechanical Compatibility:

• Package type: 2-PLCC (mandatory)
• Mounting type: Surface Mount (mandatory)
• Lens size: 2.40mm diameter (mandatory)
• Lens style: Round with Flat Top (mandatory)
• Physical dimensions: 3.20mm L x 2.80mm W (mandatory)
• Height maximum: 2.10mm (allowable tolerance range)

Electrical Compatibility:

• Color: Green (mandatory)
• Lens transparency: Clear (mandatory)
• Forward voltage (Vf): 2.0V to 2.2V (allowable range)
• Test current: 20mA (standard reference)
• Viewing angle: 120° (preferred, not mandatory)
• Wavelength - Dominant: 565nm to 572nm (green spectrum range)

Regulatory Compliance:

• RoHS3 Compliant (mandatory)
• REACH Unaffected (mandatory)

Substitute parts are classified as parametric equivalents when all mechanical and electrical parameters fall within specified tolerances. Similar parts are identified where minor parameter variations exist but functional compatibility is maintained within the application context.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent - Primary Substitutes:

AA3528SGS (Kingbright) is the direct parametric equivalent to AA3528ASGC. This part maintains identical electrical specifications (2.2V forward voltage, 20mA test current, 25mcd brightness) and mechanical dimensions. The primary distinction is product status: AA3528SGS is active with Tape & Reel packaging, whereas AA3528ASGC is obsolete. Moisture sensitivity level differs (MSL 3 versus MSL 4), indicating improved moisture resistance. This part is recommended as the primary replacement for direct substitution.

QBLP670-YG1 (QT Brightek) and SML-LX2832GC-TR (Lumex Opto/Components) are parametric equivalents meeting all mechanical and electrical compatibility criteria. Both maintain 2.40mm lens diameter, 2-PLCC package, 120° viewing angle, and 20mA test current. Forward voltage is 2.1V (within acceptable range), and brightness ratings are 28mcd and 25mcd respectively. Both are active products with ROHS3 compliance.

SML-LX2832SGC-TR (Lumex Opto/Components) provides parametric equivalence with 28mcd brightness and 2.1V forward voltage. This part offers superior moisture sensitivity (MSL 2, 1 Year) compared to the main part.

Similar Substitutes - Application-Dependent:

SML-Z14M4TT86 (Rohm Semiconductor) operates at 2.1V forward voltage with 50mA test current and 224mcd brightness. While mechanical dimensions and package type are identical, the elevated brightness and test current represent a higher-performance variant suitable for applications requiring increased luminous intensity.

SML-Z14MTT86A (Rohm Semiconductor) operates at 2.0V forward voltage with 20mA test current and 90mcd brightness. This part provides intermediate brightness between standard and high-intensity variants.

VFHG1104LS-TR (Stanley Electric) operates at 2.0V forward voltage with 561nm dominant wavelength. This part maintains all mechanical compatibility and 20mA test current. The wavelength shift toward shorter wavelengths (561nm versus 568nm) represents a perceptible color shift within the green spectrum.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can AA3528SGS directly replace AA3528ASGC without circuit modification?

A: Yes. AA3528SGS is a parametric equivalent with identical forward voltage (2.2V), test current (20mA), brightness (25mcd), and mechanical dimensions. No circuit modification is required. The primary difference is product status (active versus obsolete) and packaging format (Tape & Reel).

Q: What is the significance of the forward voltage range (2.0V to 2.2V) among substitute parts?

A: Forward voltage determines the voltage drop across the LED during operation. Parts rated at 2.0V or 2.1V require slightly lower supply voltage than the 2.2V main part. In series-resistor-limited circuits, this difference is typically compensated by the resistor value. In constant-current circuits, the voltage difference is absorbed by the current source. Verify circuit topology before selection.

Q: Are the Rohm Semiconductor SML-Z14 series parts suitable for direct replacement?

A: SML-Z14M4TT86 and SML-Z14MTT86A are mechanically compatible but differ in electrical performance. SML-Z14M4TT86 operates at 50mA test current (versus 20mA) and delivers 224mcd brightness (versus 25mcd), making it unsuitable for direct replacement in current-limited circuits. SML-Z14MTT86A operates at 20mA with 90mcd brightness and 2.0V forward voltage, making it suitable for applications tolerating higher brightness and lower forward voltage.

Q: What is the impact of lens color and transparency on substitution?

A: All listed substitute parts feature colorless lenses with clear transparency, matching the main part specification. This ensures consistent optical transmission and color appearance. Substitution with parts having different lens colors or transparency levels would alter the perceived brightness and color characteristics.

Q: How does package type (2-PLCC) affect substitution compatibility?

A: The 2-PLCC package defines the physical footprint, pin configuration, and mounting interface. All substitute parts listed use identical 2-PLCC packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes. Package type is a mandatory substitution criterion.

Q: What is the difference between wavelength-dominant and wavelength-peak specifications?

A: Wavelength-dominant represents the perceived color wavelength to the human eye. Wavelength-peak represents the spectral peak of the LED's emission curve. Both parameters define the green color characteristics. Substitute parts with wavelength-dominant values between 561nm and 572nm remain within the green spectrum and are visually compatible.

Q: Are there brightness differences among the substitute parts?

A: Yes. Brightness varies from 25mcd (AA3528SGS, SML-LX2832GC-TR, VFHG1104LS-TR) to 224mcd (SML-Z14M4TT86). Parts with identical brightness (25mcd) are direct equivalents. Parts with higher brightness (90mcd, 224mcd) are suitable only for applications where increased luminous intensity is acceptable or required.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: MSL indicates the maximum time a component can be exposed to ambient moisture before soldering. AA3528ASGC has MSL 4 (72 hours), while most substitutes have MSL 3 (168 hours) or better. Higher MSL ratings provide longer shelf life and greater tolerance to humid storage conditions. This difference does not affect functional compatibility but influences storage and handling procedures.

Q: Can VFHG1104LS-TR be used as a direct replacement despite the 561nm wavelength?

A: VFHG1104LS-TR is mechanically and electrically compatible but exhibits a perceptible color shift toward shorter wavelengths (561nm versus 568nm). Both wavelengths are within the green spectrum, but the visual appearance differs. Use this part only in applications where color consistency is not critical or where the shorter wavelength is acceptable.

Q: What viewing angle considerations apply to substitute selection?

A: The main part and most substitutes specify 120° viewing angle. SML-Z14M4TT86 and SML-Z14MTT86A do not specify viewing angle. In applications where viewing angle is critical, prioritize parts with documented 120° specification. Undocumented viewing angles may differ from the original specification.