APTD1608LSYCK Yellow LED 0603 (1608 Metric) Equivalent & Substitute Parts

Part Overview

The APTD1608LSYCK is an active-status yellow LED indicator component manufactured by Kingbright, designed for surface mount applications in the 0603 (1608 Metric) package format. This discrete LED operates at 1.85V forward voltage with a dominant wavelength of 590nm and delivers 55 millicandela brightness at 2mA test current. The component features a clear, domed round lens with 60° viewing angle and is ROHS3 compliant with MSL 3 moisture sensitivity rating.

Identifying equivalent and substitute parts is necessary when managing inventory constraints, ensuring supply chain continuity, or optimizing procurement across multiple production batches. Substitute parts must maintain identical electrical performance, mechanical compatibility, and regulatory compliance to ensure direct interchangeability without circuit redesign.

Substiute Parts

APTD1608LSYCK

KingbrightIn Stock: 1013APTD1608LSYCK Datasheet

Current PartRFQ

APTD1608LSYCK/J3-PF

KingbrightIn Stock: 1436APTD1608LSYCK/J3-PF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the APTD1608LSYCK is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Forward voltage (1.85V), test current (2mA), millicandela rating (55mcd), dominant wavelength (590nm), and viewing angle (60°) must be identical to ensure circuit compatibility and consistent visual indication performance.

Mechanical Parameters: Package format (0603/1608 Metric), mounting type (Surface Mount), lens style (Round with Domed Top), lens size (0.70mm Dia), and maximum height (1.10mm) must match to ensure PCB footprint compatibility and assembly process compatibility.

Regulatory Parameters: RoHS3 compliance and MSL 3 rating must be maintained to satisfy environmental and manufacturing requirements.

Packaging Format: Tape & Reel (TR) packaging is the specified delivery format; substitute parts must be available in equivalent packaging configurations.

The substitute part APTD1608LSYCK/J3-PF meets all these criteria and is therefore a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both APTD1608LSYCK and APTD1608LSYCK/J3-PF are active-status products manufactured by Kingbright with full ROHS3 compliance and identical MSL 3 moisture sensitivity ratings. The parts are electrically and mechanically equivalent across all specified parameters.

Selection between these parts should be based on inventory availability and packaging configuration requirements. APTD1608LSYCK/J3-PF is available in higher inventory quantity (1,425 pcs versus 925 pcs) and is designated with the HELI2 series identifier and 2-SMD supplier device package designation, indicating a packaging or tape configuration variant. Both parts maintain identical electrical performance and physical form factor.

For applications requiring immediate availability or higher volume procurement, APTD1608LSYCK/J3-PF is the preferred selection. For applications with existing supply chain documentation referencing the base APTD1608LSYCK part number, either variant is acceptable without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can APTD1608LSYCK/J3-PF be used as a direct replacement for APTD1608LSYCK in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent. All critical parameters including forward voltage (1.85V), brightness (55mcd), wavelength (590nm), package format (0603/1608 Metric), and regulatory compliance (ROHS3, MSL 3) are identical. No circuit redesign or PCB layout modification is required.

Q: What does the "/J3-PF" suffix indicate?

A: The "/J3-PF" suffix designates a specific packaging or tape configuration variant from Kingbright. The part is identified as HELI2 series with 2-SMD supplier device package format. This represents a packaging variant of the base APTD1608LSYCK part number while maintaining identical electrical and mechanical specifications.

Q: Are there any differences in brightness or color between these parts?

A: No. Both parts deliver 55 millicandela brightness at 2mA test current with identical dominant wavelength of 590nm. Visual indication performance is equivalent.

Q: What is the significance of the MSL 3 rating?

A: MSL 3 (Moisture Sensitivity Level 3) indicates the component requires controlled moisture exposure during storage and handling. Both parts must be stored in dry conditions and have a maximum floor life of 168 hours after moisture exposure. This rating applies equally to both APTD1608LSYCK and APTD1608LSYCK/J3-PF.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts are functionally and mechanically identical and can be used interchangeably in the same assembly without affecting performance or reliability.

Q: What is the viewing angle specification and how does it affect application placement?

A: Both parts have a 60° viewing angle, meaning the LED maintains specified brightness within a 60-degree cone from the optical axis. This parameter determines visibility range and should be considered during PCB placement and enclosure design to ensure adequate visibility from intended viewing positions.