LTL2R3QYK Equivalent & Substitute Parts

Part Overview

The LTL2R3QYK is an amber LED indicator manufactured by Lite-On Inc., designed for through-hole applications in T-1 3/4 (5mm) form factor. This part operates at 2V forward voltage with 700mcd brightness and a 592nm dominant wavelength. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

LTL2R3QYK

Lite-On Inc.In Stock: 869LTL2R3QYK Datasheet

Current PartRFQ

LTL2R3KYK

Lite-On Inc.In Stock: 941LTL2R3KYK Datasheet

Parametric EquivalentRFQ

WP7113SYCK

KingbrightIn Stock: 2617WP7113SYCK Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: lens size (5mm T-1 3/4), mounting type (through hole), package configuration (radial), lens transparency (clear), and electrical characteristics (forward voltage, test current, and wavelength range).

The LTL2R3QYK has one parametric equivalent and one manufacturer-recommended substitute:

Parametric Equivalent: LTL2R3KYK maintains identical mechanical form factor, lens specifications, and electrical operating parameters within acceptable tolerance. Forward voltage differs by 0.05V (2.05V vs 2V), which is within standard LED tolerance ranges for this category.

Manufacturer-Recommended Substitute: WP7113SYCK is a Kingbright alternative with identical mechanical compatibility and package form factor. This substitute differs in color (yellow vs amber) and wavelength (590nm vs 592nm), representing a functional alternative for applications where amber-to-yellow color substitution is acceptable.

Parameter Comparison

Engineering Selection Recommendations

LTL2R3KYK is the primary substitute for LTL2R3QYK. Both parts are from Lite-On Inc. and share identical mechanical and optical specifications. The LTL2R3KYK is currently in active production status and carries ROHS3 compliance, addressing regulatory requirements that the obsolete LTL2R3QYK does not meet. Forward voltage tolerance (2.05V vs 2V) is within acceptable operating margins for standard LED applications.

WP7113SYCK is a secondary alternative when color substitution from amber to yellow is acceptable within the application design. This Kingbright part maintains mechanical compatibility and radial package configuration. The increased brightness rating (3000mcd vs 700mcd) and narrower viewing angle (20° vs 30°) represent functional differences that must be evaluated against specific application requirements. ROHS3 compliance is confirmed for this substitute.

Frequently Asked Questions (FAQ)

Q: Can LTL2R3KYK be used as a direct replacement for LTL2R3QYK?

A: Yes. Both parts share identical lens size (5mm T-1 3/4), mounting type (through hole), color (amber), wavelength (592nm dominant), brightness (700mcd), and viewing angle (30°). Forward voltage differs by 0.05V (2.05V vs 2V), which is within standard LED tolerance specifications for this category.

Q: What is the primary advantage of LTL2R3KYK over the obsolete LTL2R3QYK?

A: LTL2R3KYK is in active production and carries ROHS3 compliance certification, whereas LTL2R3QYK is obsolete and RoHS non-compliant. This ensures long-term supply availability and regulatory compliance for new designs.

Q: When should WP7113SYCK be considered instead of LTL2R3KYK?

A: WP7113SYCK is applicable only when the application can accommodate a color change from amber to yellow (590nm vs 592nm wavelength). The increased brightness (3000mcd vs 700mcd) and reduced viewing angle (20° vs 30°) must be compatible with the intended application.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts use the 5mm T-1 3/4 form factor with radial through-hole mounting and identical maximum height (8.70mm for LTL2R3QYK and LTL2R3KYK). WP7113SYCK height is not specified but maintains the same package standard.

Q: What are the RoHS compliance differences?

A: LTL2R3QYK is RoHS non-compliant. Both LTL2R3KYK and WP7113SYCK are ROHS3 compliant, making them suitable for applications requiring regulatory compliance.