LTST-5630VSWT Yellow LED SMD Equivalent & Substitute Parts

Part Overview

The LTST-5630VSWT is a yellow 590nm LED indication component manufactured by Lite-On Inc., configured as a 4-SMD device with flat leads. This part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity. The component operates at a forward voltage of 2.3V with a test current of 120mA and features a 120° viewing angle in a diffused lens configuration.

Substiute Parts

LTST-5630VSWT

Lite-On Inc.In Stock: 1060LTST-5630VSWT Datasheet

Current PartRFQ

LTW-5630SD590

Lite-On Inc.In Stock: 925LTW-5630SD590 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTST-5630VSWT is determined by the following critical parameters:

• Wavelength matching at 590nm (dominant) to maintain color consistency in indication applications
• Forward voltage compatibility within the 2.3V to 2.5V range to ensure circuit design compatibility
• Surface mount configuration with 4-SMD flat lead package to maintain PCB layout compatibility
• Viewing angle of 120° for consistent light distribution characteristics
• Moisture sensitivity level MSL 3 for equivalent handling and storage requirements
• Physical dimensions of 5.30mm x 3.00mm footprint for PCB placement compatibility

The substitute part LTW-5630SD590 meets these criteria as an active product from the same manufacturer, providing direct functional equivalence while maintaining mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LTW-5630SD590 is the recommended substitute for the obsolete LTST-5630VSWT based on the following factors:

The substitute part maintains active product status with Lite-On Inc., ensuring long-term availability and supply chain continuity. Both components share identical wavelength specifications at 590nm, equivalent viewing angles at 120°, and matching MSL ratings of 3 (168 Hours). The forward voltage differential of 0.2V (2.3V to 2.5V) and current test increase from 120mA to 150mA fall within acceptable design tolerance ranges for indication LED applications. The substitute features an exposed pad configuration in the 4-SMD package, which provides improved thermal performance compared to the original flat lead design. Physical footprint compatibility is maintained with identical 5.30mm x 3.00mm dimensions, with a maximum height increase of 0.07mm (0.90mm to 0.97mm) that remains within typical PCB assembly clearance specifications.

The LTW-5630SD590 carries RoHS3 compliance status, providing enhanced environmental and regulatory alignment compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the LTW-5630SD590 be used as a direct replacement in existing designs?

A: The LTW-5630SD590 is mechanically and electrically compatible with the LTST-5630VSWT for indication applications. The identical 5.30mm x 3.00mm footprint and 4-SMD package configuration allow direct PCB placement without layout modifications. The forward voltage increase from 2.3V to 2.5V requires circuit verification to confirm the design operates within acceptable current and power dissipation limits.

Q: What is the significance of the exposed pad in the LTW-5630SD590 package?

A: The exposed pad configuration in the LTW-5630SD590 provides enhanced thermal dissipation compared to the flat lead design of the LTST-5630VSWT. This improves heat transfer from the LED junction to the PCB, supporting higher current operation (150mA vs. 120mA) and extended operational life in thermal-constrained applications.

Q: Are there any compliance differences between these parts?

A: The LTW-5630SD590 carries RoHS3 compliance certification, while the obsolete LTST-5630VSWT does not specify this status. Both parts maintain identical MSL 3 (168 Hours) moisture sensitivity ratings and EAR99 ECCN classifications. The substitute part provides improved regulatory alignment for new designs and procurement.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by wavelength matching at 590nm, forward voltage compatibility in the 2.3V to 2.5V range, identical 120° viewing angle, 4-SMD flat lead package configuration, 5.30mm x 3.00mm footprint, and MSL 3 moisture sensitivity level. These parameters ensure functional and mechanical equivalence in indication LED applications.

Q: Is the 0.07mm height difference significant for PCB assembly?

A: The height increase from 0.90mm to 0.97mm is negligible for standard PCB assembly processes. This difference remains well within typical component clearance specifications and does not require design modifications to existing PCB layouts or assembly fixtures.