LTST-C155GYKT Equivalent & Substitute Parts

Part Overview

The LTST-C155GYKT is a dual-color surface mount LED indicator manufactured by Lite-On Inc., featuring independent green and yellow light emission in a 1210 (3225 Metric) package format. This component is designed for LED indication applications requiring simultaneous green and yellow color capability. The part maintains Active product status and is RoHS3 compliant with REACH unaffected classification. Substitute parts are identified to address inventory availability, packaging format preferences, or specific performance parameter requirements while maintaining functional compatibility within the 1210 package category.

Substiute Parts

LTST-C155GYKT

Lite-On Inc.In Stock: 2436LTST-C155GYKT Datasheet

Current PartRFQ

HSMF-C156

Broadcom LimitedIn Stock: 28851HSMF-C156 Datasheet

MFR RecommendedRFQ

SML-LX1210YGC-TR

Lumex Opto/Components Inc.In Stock: 5584SML-LX1210YGC-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTST-C155GYKT is determined by the following mandatory parameters:

• Package / Case: 1210 (3225 Metric) form factor
• Color Configuration: Green and Yellow independent operation
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Product Status: Active

The identified substitute parts meet all mandatory substitution criteria. Variations in forward voltage (Vf), test current, millicandela rating, viewing angle, lens transparency, and moisture sensitivity level represent allowable parameter ranges within the 1210 dual-color LED category. These variations do not preclude functional substitution when circuit design accommodates the specified electrical characteristics of the selected part.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and full RoHS3 compliance with REACH unaffected classification, establishing baseline regulatory equivalence.

HSMF-C156 (Broadcom Limited) operates at elevated forward voltage (2.2V Green) and test current (20mA) compared to the LTST-C155GYKT baseline. This part delivers increased millicandela output (15mcd Green, 8mcd Yellow) and wider viewing angle (170°) with diffused lens transparency. Selection of this part requires circuit design accommodation for higher current draw and forward voltage specifications.

SML-LX1210YGC-TR (Lumex Opto/Components Inc.) operates at 2.2V forward voltage (Green) and 20mA test current, matching the Broadcom electrical profile. This part maintains clear lens transparency consistent with the LTST-C155GYKT and delivers intermediate millicandela output (10mcd Green, 10mcd Yellow) with 140° viewing angle. Tape & Reel packaging format aligns with the original part specification.

Selection between substitute parts depends on circuit current capacity, desired luminous intensity, viewing angle requirements, and packaging format compatibility with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can HSMF-C156 directly replace LTST-C155GYKT without circuit modification?

A: HSMF-C156 operates at higher forward voltage (2.2V Green vs. 2.1V Green) and elevated test current (20mA vs. 10mA). Circuit design must accommodate these electrical parameter differences. Direct substitution without current-limiting circuit adjustment may result in excessive component stress.

Q: What is the primary difference between clear and diffused lens options?

A: Clear lens (LTST-C155GYKT, SML-LX1210YGC-TR) provides directional light emission with narrower viewing angles. Diffused lens (HSMF-C156) scatters light across a wider viewing angle (170°) with reduced intensity concentration. Selection depends on application viewing geometry requirements.

Q: Are all substitute parts available in the same packaging format?

A: LTST-C155GYKT and SML-LX1210YGC-TR are supplied in Tape & Reel (TR) format. HSMF-C156 is supplied in Cut Tape (CT) & Digi-Reel® format. Packaging format compatibility must be verified against assembly equipment specifications.

Q: What does Moisture Sensitivity Level (MSL) indicate for component handling?

A: MSL rating specifies maximum exposure time to ambient moisture before component degradation. LTST-C155GYKT and SML-LX1210YGC-TR are rated MSL 3 (168 Hours). HSMF-C156 is rated MSL 2A (4 Weeks). Lower MSL ratings require more stringent moisture control during storage and assembly processes.

Q: Can these parts be used interchangeably in high-brightness applications?

A: HSMF-C156 and SML-LX1210YGC-TR deliver higher millicandela output than LTST-C155GYKT. Application requirements for luminous intensity must be evaluated against each part's specified millicandela rating to ensure adequate brightness performance.