APED3528SEC/J4 Equivalent & Substitute Parts Reference

Part Overview

The APED3528SEC/J4 is an orange 605nm LED indication component manufactured by Kingbright in a 1411 (3528 Metric) surface mount package. This discrete LED operates at 2.2V forward voltage with a 20mA test current and delivers 1800mcd luminous intensity through a clear, domed round lens. The component is Active status and ROHS3 compliant, suitable for indicator applications requiring orange wavelength output.

Substitute parts are necessary when primary component availability is limited, when alternative packaging formats are required for design optimization, or when performance parameters within acceptable tolerances can be achieved through alternative manufacturers while maintaining functional equivalence.

Substiute Parts

APED3528SEC/J4

KingbrightIn Stock: 840APED3528SEC/J4 Datasheet

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SML-Z14D4TT86

Rohm SemiconductorIn Stock: 2985SML-Z14D4TT86 Datasheet

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SML-Z14DTT86A

Rohm SemiconductorIn Stock: 2464SML-Z14DTT86A Datasheet

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SML-Z14Y4TT86

Rohm SemiconductorIn Stock: 16500SML-Z14Y4TT86 Datasheet

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SML-Z14YTT86A

Rohm SemiconductorIn Stock: 950SML-Z14YTT86A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the APED3528SEC/J4 is based on the following criteria:

Primary Substitutes (Orange 605nm, Same Operating Current):

• SML-Z14D4TT86 and SML-Z14DTT86A are orange LEDs with 605nm dominant wavelength
• Both operate at surface mount configuration with 2-PLCC package format
• Forward voltage ranges from 1.9V to 2.0V, within acceptable tolerance of the 2.2V specification
• SML-Z14D4TT86 operates at 50mA test current; SML-Z14DTT86A operates at 20mA test current (matching APED3528SEC/J4)
• Brightness ratings (710mcd and 280mcd respectively) differ from the 1800mcd specification
• Package dimensions differ: 3.20mm L x 2.80mm W versus 3.50mm L x 2.80mm W
• Height reduced to 2.05mm maximum versus 3.20mm

Secondary Substitutes (Yellow Wavelength, Alternative Color):

• SML-Z14Y4TT86 and SML-Z14YTT86A are yellow LEDs with 590nm and 589nm dominant wavelengths respectively
• These components are functionally equivalent in electrical and mechanical characteristics but provide yellow output instead of orange
• Selection of yellow substitutes requires application acceptance of color change
• SML-Z14Y4TT86 operates at 50mA; SML-Z14YTT86A operates at 20mA

Common Compliance Across All Parts:

• All substitute parts are ROHS3 compliant
• All are Active status products
• All are surface mount configuration
• All have colorless, clear lens design

Parameter Comparison

Engineering Selection Recommendations

For Direct Orange 605nm Substitution with 20mA Operating Point:

SML-Z14DTT86A is the closest functional equivalent to APED3528SEC/J4. Both components operate at 20mA test current and maintain 605nm dominant wavelength output. Forward voltage is 1.9V versus 2.2V, representing a 0.3V reduction that is acceptable in most indicator circuit designs. The 280mcd brightness is significantly lower than the 1800mcd specification; this reduction must be evaluated against application visibility requirements.

For Direct Orange 605nm Substitution with 50mA Operating Point:

SML-Z14D4TT86 provides 605nm orange output at higher brightness (710mcd) but requires 50mA test current. This component is suitable only when circuit design accommodates the increased current draw. Forward voltage of 2.0V is closer to the original 2.2V specification than SML-Z14DTT86A.

Package and Physical Constraints:

All Rohm SML-Z14 series substitutes use 2-PLCC package format with reduced dimensions (3.20mm L x 2.80mm W versus 3.50mm L x 2.80mm W) and lower profile (2.05mm maximum height versus 3.20mm). These physical differences require PCB layout verification to confirm compatibility with existing footprints and clearance requirements.

Moisture Sensitivity Consideration:

APED3528SEC/J4 specifies MSL 3 (168 Hours); all Rohm substitutes specify MSL 4 (72 Hours). This represents a more stringent moisture handling requirement for substitute parts, necessitating shorter exposure times during storage and assembly.

Yellow Wavelength Alternatives:

SML-Z14Y4TT86 and SML-Z14YTT86A provide yellow output (590nm and 589nm respectively) with electrical characteristics similar to their orange counterparts. These components are suitable only when application design permits color substitution from orange to yellow.

Regulatory and Compliance Status:

All substitute parts maintain ROHS3 compliance and Active product status, ensuring regulatory equivalence with the original component.

Frequently Asked Questions (FAQ)

Q: Can SML-Z14D4TT86 directly replace APED3528SEC/J4 without circuit modification?

A: SML-Z14D4TT86 requires 50mA test current versus the 20mA specification of APED3528SEC/J4. Direct substitution without circuit modification is not recommended. Current-limiting resistor values must be recalculated to accommodate the 50mA operating point. Forward voltage difference (2.0V versus 2.2V) may also require circuit adjustment depending on supply voltage and design margins.

Q: What is the impact of the 2-PLCC package format versus the 1411 (3528 Metric) package?

A: The 2-PLCC package has different physical dimensions (3.20mm L x 2.80mm W versus 3.50mm L x 2.80mm W) and reduced height (2.05mm versus 3.20mm). Existing PCB footprints designed for 1411 (3528 Metric) package will not accommodate 2-PLCC components. PCB redesign is required for substitution with Rohm SML-Z14 series parts.

Q: Is SML-Z14DTT86A suitable for applications requiring 1800mcd brightness?

A: No. SML-Z14DTT86A provides 280mcd brightness, approximately 15.6% of the 1800mcd specification of APED3528SEC/J4. This component is suitable only for applications where reduced brightness is acceptable or where circuit design compensates through increased viewing angle or lens design modifications.

Q: Can yellow LED substitutes (SML-Z14Y4TT86 or SML-Z14YTT86A) be used in place of the orange APED3528SEC/J4?

A: Yellow substitutes are electrically and mechanically compatible but provide different wavelength output (590nm or 589nm versus 605nm). Substitution is possible only when application design permits color change from orange to yellow. Visual appearance and color-coding requirements must be verified before implementation.

Q: What are the moisture handling differences between APED3528SEC/J4 and Rohm substitutes?

A: APED3528SEC/J4 specifies MSL 3 (168 Hours), allowing 168 hours of exposure to 85% relative humidity at 85°C before baking is required. All Rohm SML-Z14 substitutes specify MSL 4 (72 Hours), requiring baking after 72 hours of exposure. Substitute parts require more stringent moisture control during storage and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. APED3528SEC/J4 and all listed substitute parts (SML-Z14D4TT86, SML-Z14DTT86A, SML-Z14Y4TT86, SML-Z14YTT86A) are ROHS3 compliant. Regulatory equivalence is maintained across all options.

Q: What is the viewing angle difference between APED3528SEC/J4 and substitute parts?

A: APED3528SEC/J4 specifies 40° viewing angle. Rohm SML-Z14 series substitute parts do not provide viewing angle specifications in the available data. Optical performance differences may exist due to lens style variation (domed top versus flat top). Application-specific visibility requirements must be verified through testing or manufacturer consultation.

Q: Which substitute part is most compatible with the original APED3528SEC/J4 specification?

A: SML-Z14DTT86A provides the closest electrical match, operating at identical 20mA test current and maintaining 605nm orange wavelength. Forward voltage difference (1.9V versus 2.2V) is minimal. However, package format and physical dimensions differ significantly, requiring PCB redesign. Brightness reduction (280mcd versus 1800mcd) must be evaluated for application suitability.