FKY3C64X-H Yellow LED Equivalent & Substitute Parts

Part Overview

The FKY3C64X-H is a yellow LED indication component manufactured by Stanley Electric Co., designed for through-hole mounting applications. This discrete LED operates at 2.3V forward voltage with a 1000mcd brightness rating and features a clear round domed lens at 3.10mm diameter. The component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

FKY3C64X-H

Stanley Electric CoIn Stock: 691FKY3C64X-H Datasheet

Current PartRFQ

SSL-LX3044SYC

Lumex Opto/Components Inc.In Stock: 1741SSL-LX3044SYC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FKY3C64X-H is determined by the following critical parameters:

Color and Wavelength Compatibility: The substitute must emit yellow light within the 590nm dominant wavelength range to maintain optical consistency in indication applications.

Electrical Characteristics: Forward voltage (Vf) and test current must be compatible with existing circuit designs. The FKY3C64X-H operates at 2.3V typical; substitutes with forward voltages within ±0.3V are functionally compatible in standard LED indication circuits.

Brightness Level: The 1000mcd rating establishes the minimum luminous intensity requirement. Substitutes must maintain this brightness specification for equivalent visual indication performance.

Mechanical Form Factor: Through-hole radial mounting with round domed lens geometry ensures physical compatibility with PCB layouts and mechanical assemblies designed for the original component.

Regulatory Compliance: RoHS and REACH compliance status must be maintained to satisfy environmental and regulatory requirements in target markets.

The SSL-LX3044SYC from Lumex Opto/Components Inc. meets these substitution criteria across all critical parameters.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The FKY3C64X-H is classified as obsolete. The SSL-LX3044SYC is classified as active, ensuring long-term availability and supply chain continuity for new designs and ongoing production requirements.

Compliance Verification: Both components maintain RoHS and REACH compliance status, satisfying environmental regulatory requirements. The SSL-LX3044SYC achieves ROHS3 compliance, representing the current regulatory standard.

Electrical Compatibility: The SSL-LX3044SYC operates at 2.1V forward voltage compared to the FKY3C64X-H at 2.3V. This 0.2V difference is within acceptable tolerance for standard LED indication circuits and does not require circuit redesign.

Physical Integration: The SSL-LX3044SYC height of 4.60mm is lower than the FKY3C64X-H at 6.10mm. This dimensional difference must be verified against PCB layout constraints and mechanical assembly requirements in the target application.

Brightness Equivalence: Both components deliver 1000mcd brightness at 20mA test current, ensuring equivalent visual indication performance in end-use applications.

Frequently Asked Questions (FAQ)

Q: Can the SSL-LX3044SYC directly replace the FKY3C64X-H without circuit modification?

A: The SSL-LX3044SYC is electrically compatible with the FKY3C64X-H. The 0.2V forward voltage difference (2.1V vs. 2.3V) falls within standard LED circuit tolerance and does not require circuit redesign. Physical PCB layout must be verified to accommodate the lower component height (4.60mm vs. 6.10mm).

Q: What is the significance of the lens color difference between the two parts?

A: The FKY3C64X-H features a yellow lens, while the SSL-LX3044SYC features a colorless lens. Both emit yellow light at 590nm peak wavelength. The colorless lens in the SSL-LX3044SYC provides equivalent optical performance for yellow indication applications.

Q: Are both components suitable for new design implementations?

A: The FKY3C64X-H is obsolete and not recommended for new designs. The SSL-LX3044SYC is active and suitable for new design implementations, offering long-term supply availability and current regulatory compliance.

Q: What packaging options are available for the SSL-LX3044SYC?

A: The SSL-LX3044SYC is supplied in bulk packaging. The base product number is SSL-LX3044, classified as T-1 package type for through-hole radial mounting.

Q: How do the brightness ratings compare between these components?

A: Both the FKY3C64X-H and SSL-LX3044SYC deliver 1000mcd brightness at 20mA test current, providing equivalent luminous intensity for indication applications.

Q: What is the moisture sensitivity level difference between these parts?

A: The FKY3C64X-H has MSL 2 (1 Year storage), while the SSL-LX3044SYC has MSL 1 (Unlimited storage). The SSL-LX3044SYC offers superior moisture resistance and longer shelf life.