APA1606SGC Equivalent & Substitute Parts

Part Overview

The APA1606SGC is an active-status green LED indication component manufactured by Kingbright, designed for surface mount right-angle applications. This 2-SMD, no-lead chip LED operates at a forward voltage of 2.2V with a test current of 20mA and emits light at a dominant wavelength of 568nm. The component features a clear colorless lens with a rectangular flat-top design measuring 1.20mm x 0.60mm, mounted in a tape and reel packaging format. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while meeting the same application requirements.

Substiute Parts

APA1606SGC

KingbrightIn Stock: 1239APA1606SGC Datasheet

Current PartRFQ

LTST-S270GKT

Lite-On Inc.In Stock: 2226LTST-S270GKT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the APA1606SGC is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Color specification: Green
• Wavelength range: Dominant wavelength within acceptable tolerance of 568nm
• Forward voltage: Nominal 2.2V operation at 20mA test current
• Millicandela rating: Brightness output suitable for indication applications
• Viewing angle: Optical performance characteristics
• Lens dimensions and style: Physical compatibility with 1.20mm x 0.60mm rectangular flat-top design
• Mounting configuration: Surface mount, right-angle orientation
• Package type: 2-SMD or equivalent no-lead configuration
• Height constraint: Maximum 0.60mm to maintain PCB assembly compatibility
• Regulatory compliance: ROHS3 compliance and MSL rating equivalence

The LTST-S270GKT from Lite-On Inc. qualifies as a substitute based on matching color, green wavelength emission, comparable forward voltage, equivalent test current, compatible lens dimensions, right-angle surface mount configuration, and identical regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

APA1606SGC Selection Basis: The APA1606SGC remains the primary component choice when Kingbright sourcing is established and inventory availability meets production schedules. This component maintains active product status with 1138 units in current stock. ROHS3 compliance and EAR99 export classification support standard procurement workflows. The 12mcd brightness rating and 110° viewing angle define the baseline optical performance for green indication applications.

LTST-S270GKT Substitution Basis: The LTST-S270GKT qualifies as a direct substitute when APA1606SGC availability is constrained. Lite-On Inc. manufacturing maintains identical ROHS3 compliance and MSL rating. The 2200-unit inventory availability provides supply continuity. Forward voltage operates at 2.1V versus 2.2V, representing a 0.1V reduction within typical LED operating tolerance. The 10mcd brightness rating is 2mcd lower than the primary part, acceptable for indication-only applications where absolute brightness is not critical. The 130° viewing angle exceeds the primary part specification, providing enhanced visibility across wider observation angles. Dimensional compatibility is confirmed across all critical mechanical parameters including lens size, height, and mounting configuration.

Regulatory and Compliance Alignment: Both components maintain identical ROHS3 compliance status, MSL rating of 3 (168 Hours), REACH unaffected status, and EAR99 export classification. No additional compliance verification is required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can LTST-S270GKT replace APA1606SGC in existing designs without PCB modification?

A: Yes. Both components share identical mounting type (surface mount, right angle), lens dimensions (1.20 x 0.60mm), maximum height (0.60mm), and package footprint compatibility. The 1.60 x 1.15mm dimension of LTST-S270GKT versus 1.60 x 1.20mm of APA1606SGC represents a 0.05mm width reduction, which does not affect PCB layout or assembly processes.

Q: What is the impact of the 0.1V forward voltage difference between these components?

A: The APA1606SGC operates at 2.2V typical forward voltage while LTST-S270GKT operates at 2.1V. This 0.1V difference is within standard LED operating tolerance and does not require circuit redesign. Current-limiting resistor values calculated for 2.2V operation remain valid for 2.1V operation in indication applications.

Q: How does the 2mcd brightness difference affect application performance?

A: The APA1606SGC provides 12mcd brightness while LTST-S270GKT provides 10mcd. For indication-only applications where the LED serves as a status signal rather than illumination source, this 2mcd reduction does not impact functional performance. Applications requiring specific brightness thresholds should verify the 10mcd rating meets minimum visibility requirements.

Q: Are there package or tape format differences between these components?

A: Both components are supplied in tape and reel (TR) packaging format. The APA1606SGC uses a 2-SMD, no-lead package designation while LTST-S270GKT uses 0603 (1608 Metric) package designation. Despite different nomenclature, both represent equivalent physical configurations suitable for automated pick-and-place assembly.

Q: What is the significance of the 20° viewing angle difference?

A: The APA1606SGC specifies 110° viewing angle while LTST-S270GKT specifies 130°. The wider 130° viewing angle of the substitute part provides enhanced visibility across a broader observation range. This represents an improvement over the primary part specification and does not create compatibility issues.

Q: Do both components require identical moisture handling procedures?

A: Yes. Both components carry MSL rating 3 (168 Hours), indicating identical moisture sensitivity levels and storage requirements. Standard MSL 3 handling procedures apply to both components without differentiation.

Q: Can these components be mixed within the same production batch?

A: Yes. Identical regulatory compliance (ROHS3, REACH unaffected, EAR99), matching MSL ratings, and compatible electrical/mechanical parameters support mixed-component assembly within single production runs. Component sourcing should be documented for traceability purposes.