Equivalent & Substitute Parts for AA3528ASECK Orange SMD LED

Part Overview

The AA3528ASECK is an orange surface-mount LED manufactured by Kingbright, designed for indication applications with a dominant wavelength of 601nm and peak wavelength of 610nm. This component operates at a forward voltage of 2.1V with a test current of 20mA and delivers 300 millicandela brightness in a 2-PLCC package with 120° viewing angle.

The AA3528ASECK is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute components must maintain compatibility across electrical characteristics, mechanical dimensions, and mounting specifications.

Key Parameters

Parameter	Value	Unit	Significance for Substitution
Color	Orange	-	Determines visual indication function
Wavelength - Dominant	601nm	nm	Defines color specification and application compatibility
Wavelength - Peak	610nm	nm	Specifies peak emission characteristics
Voltage - Forward (Vf) Typical	2.1V	V	Critical for circuit design and current limiting resistor calculation
Current - Test	20mA	mA	Establishes rated operating condition
Millicandela Rating	300mcd	mcd	Brightness specification for indication visibility
Viewing Angle	120°	degrees	Determines visibility range in application
Lens Style	Round with Flat Top	-	Mechanical and optical compatibility
Lens Size	2.40mm Dia	mm	Physical dimension for PCB layout
Package / Case	2-PLCC	-	Footprint and mounting compatibility
Size / Dimension	3.20mm L x 2.80mm W	mm	PCB footprint specification
Height (Max)	2.10mm	mm	Clearance and assembly compatibility
Mounting Type	Surface Mount	-	Assembly process compatibility
RoHS Status	ROHS3 Compliant	-	Regulatory compliance requirement
MSL Rating	4 (72 Hours)	-	Moisture handling and storage requirements

Substitute Part Grouping Explanation

Substitute parts for the AA3528ASECK are classified into two categories based on substitution criteria:

Direct Manufacturer Substitutes maintain identical or near-identical electrical and mechanical specifications from the same manufacturer (Kingbright). These parts satisfy all critical parameters including color, wavelength range, forward voltage, test current, package type, and physical dimensions.

Similar Manufacturer Substitutes are sourced from alternative manufacturers (Rohm Semiconductor, Lite-On Inc., Lumex Opto/Components Inc.) and maintain compatibility across the following key parameters:

Color specification (orange or functionally equivalent wavelength)
Package type (2-PLCC)
Mounting type (Surface Mount)
Physical dimensions (3.20mm L x 2.80mm W footprint)
Forward voltage range (1.9V to 2.1V)
Test current (20mA to 50mA)
Lens style (Round with Flat Top)
Lens size (2.40mm Dia)
RoHS3 compliance
HTSUS classification (8541.41.0000)

Substitution is valid when the substitute part operates within the circuit's voltage and current design parameters and maintains the required optical characteristics for the intended indication function.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength - Dominant (nm)	Wavelength - Peak (nm)	Vf Typical (V)	Current - Test (mA)	Millicandela (mcd)	Viewing Angle (°)	Package	Dimensions (mm)	Height Max (mm)	Product Status	MSL Rating
AA3528ASECK	Kingbright	Orange	601	610	2.1	20	300	120	2-PLCC	3.20 x 2.80	2.10	Obsolete	4 (72H)
AA3528SESK	Kingbright	Orange	601	610	2.1	20	230	120	2-PLCC	3.20 x 2.80	2.10	Active	3 (168H)
SML-Z14DTT86A	Rohm Semiconductor	Orange	605	-	1.9	20	280	-	2-PLCC	3.20 x 2.80	2.05	Active	4 (72H)
SML-Z14D4TT86	Rohm Semiconductor	Orange	605	-	2.0	50	710	-	2-PLCC	3.20 x 2.80	2.05	Active	4 (72H)
SML-LX2832SOC-TR	Lumex Opto/Components Inc.	Orange	-	610	2.0	20	300	120	2-PLCC	3.20 x 2.80	2.10	Active	3 (168H)
LTST-B680QSKT	Lite-On Inc.	Yellow	590	591	2.1	20	785	120	2-PLCC	3.20 x 2.80	1.90	Active	3 (168H)
SML-Z14YTT86A	Rohm Semiconductor	Yellow	589	-	2.0	20	280	-	2-PLCC	3.20 x 2.80	2.05	Active	4 (72H)
SML-Z14Y4TT86	Rohm Semiconductor	Yellow	590	-	2.1	50	710	-	2-PLCC	3.20 x 2.80	2.05	Active	4 (72H)

Engineering Selection Recommendations

Primary Substitute (Direct Replacement):

AA3528SESK is the recommended direct substitute for AA3528ASECK. Both parts are manufactured by Kingbright, share identical package specifications (2-PLCC), physical dimensions (3.20mm x 2.80mm), and electrical operating parameters (2.1V forward voltage, 20mA test current). The AA3528SESK is currently in active production status, ensuring long-term supply availability. The brightness difference (230mcd versus 300mcd) is acceptable for indication applications where the primary function is status signaling rather than high-intensity illumination. Both parts maintain ROHS3 compliance and identical HTSUS classification. The AA3528SESK features improved moisture sensitivity (MSL 3 versus MSL 4), providing superior handling characteristics during storage and assembly.

Secondary Substitutes (Cross-Manufacturer Alternatives):

SML-Z14DTT86A (Rohm Semiconductor) provides electrical compatibility with a forward voltage of 1.9V and test current of 20mA, matching the AA3528ASECK operating point. This part maintains identical package type, physical dimensions, and mechanical compatibility. The wavelength specification (605nm dominant) falls within acceptable orange LED range. Brightness (280mcd) is comparable to the primary substitute.

SML-LX2832SOC-TR (Lumex Opto/Components Inc.) offers parametric equivalence with identical brightness (300mcd), viewing angle (120°), and peak wavelength (610nm) to the original part. Forward voltage is 2.0V with 20mA test current, providing near-identical circuit behavior. Physical dimensions and package type are fully compatible.

Color-Variant Alternatives:

Yellow LED substitutes (LTST-B680QSKT, SML-Z14YTT86A, SML-Z14Y4TT86) are listed as available alternatives only when application requirements permit color change from orange to yellow indication. These parts maintain identical package specifications and mounting compatibility but serve different functional roles due to wavelength differences.

Brightness-Enhanced Alternative:

SML-Z14D4TT86 (Rohm Semiconductor) provides significantly higher brightness (710mcd) at the cost of elevated test current (50mA). This part is suitable only for applications where increased visibility is required and the circuit design accommodates the higher current demand.

All recommended substitutes maintain ROHS3 compliance, surface-mount compatibility, and HTSUS classification 8541.41.0000, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can AA3528SESK directly replace AA3528ASECK without circuit modification?

A: Yes. Both parts operate at 2.1V forward voltage with 20mA test current and share identical 2-PLCC package specifications. No circuit redesign is required. The brightness difference (230mcd versus 300mcd) does not necessitate resistor recalculation for standard indication applications.

Q: What is the significance of the MSL rating difference between AA3528ASECK (MSL 4) and AA3528SESK (MSL 3)?

A: MSL 4 allows 72 hours of exposure to moisture before reflow soldering, while MSL 3 allows 168 hours. AA3528SESK provides extended handling time during storage and assembly, reducing risk of moisture-induced defects. Both ratings are suitable for standard manufacturing environments with proper moisture control.

Q: Are Rohm Semiconductor SML-Z14 series parts fully compatible with the AA3528ASECK footprint?

A: Yes. SML-Z14DTT86A and SML-Z14D4TT86 maintain identical physical dimensions (3.20mm L x 2.80mm W) and 2-PLCC package type. Height specifications (2.05mm versus 2.10mm) are within acceptable tolerance for PCB assembly. Electrical parameters (forward voltage 1.9V to 2.0V, test current 20mA to 50mA) require verification against circuit design limits.

Q: Can SML-LX2832SOC-TR be used as a drop-in replacement?

A: Yes. SML-LX2832SOC-TR matches the original part's brightness (300mcd), viewing angle (120°), and peak wavelength (610nm). Physical dimensions and package type are identical. Forward voltage is 2.0V (versus 2.1V), representing a 4.8% reduction that is typically acceptable in indication circuits with standard current-limiting resistor designs.

Q: What is the primary difference between direct manufacturer substitutes and similar manufacturer substitutes?

A: Direct manufacturer substitutes (AA3528SESK) are produced by the original manufacturer (Kingbright) and maintain identical design specifications. Similar manufacturer substitutes (Rohm, Lumex, Lite-On) are produced by alternative manufacturers and may exhibit minor variations in wavelength, brightness, or electrical characteristics while maintaining functional compatibility across package, mounting, and primary electrical parameters.

Q: Are yellow LED alternatives (LTST-B680QSKT, SML-Z14YTT86A) suitable for orange LED applications?

A: Yellow LED substitutes are not suitable for applications requiring orange indication. Wavelength differences (590nm yellow versus 601nm orange) produce visually distinct colors. Yellow alternatives are listed only for reference in applications where color change is acceptable or required by design modification.

Q: How do I determine which substitute is appropriate for my specific application?

A: Verify three critical parameters: (1) Forward voltage compatibility with your circuit's current-limiting resistor design, (2) Brightness requirement (millicandela rating) for visibility in your application environment, (3) Viewing angle requirement for the intended mounting location. All listed substitutes maintain identical package type and physical dimensions, ensuring mechanical compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance, REACH unaffected status, and ECCN EAR99 classification. HTSUS code 8541.41.0000 applies uniformly across all parts, ensuring consistent tariff and regulatory treatment.

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