SLI-343YC3F Equivalent & Substitute Parts

Part Overview

The SLI-343YC3F is a yellow LED indicator from Rohm Semiconductor designed for through-hole applications. This component operates at 1.9V forward voltage with a 350mcd brightness rating and features a 587nm dominant wavelength. The part is classified as "Not For New Designs," making identification of functionally equivalent alternatives essential for ongoing production support and design updates.

Substiute Parts

SLI-343YC3F

Rohm SemiconductorIn Stock: 1646SLI-343YC3F Datasheet

Current PartRFQ

WP710A10SET

KingbrightIn Stock: 1039WP710A10SET Datasheet

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WP710A10SYT

KingbrightIn Stock: 2039WP710A10SYT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLI-343YC3F are identified based on the following critical parameters:

• Color Match: Yellow wavelength range (587nm–590nm)
• Mounting Configuration: Through-hole radial package, T-1 form factor
• Electrical Compatibility: Forward voltage and test current within acceptable operating ranges
• Mechanical Compatibility: Lens style (round domed top), package dimensions, and form factor
• Compliance: RoHS3 compliance and REACH unaffected status

The WP710A10SYT from Kingbright meets these criteria as a direct functional equivalent. Both parts operate as yellow LED indicators in T-1 through-hole packages with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The WP710A10SYT is the primary substitute for the SLI-343YC3F. Both components are RoHS3 compliant and REACH unaffected, meeting regulatory requirements. The WP710A10SYT carries an Active product status, ensuring long-term availability and supply chain stability compared to the SLI-343YC3F's "Not For New Designs" classification.

The WP710A10SYT operates at 2V forward voltage versus the SLI-343YC3F's 1.9V, representing a 0.1V increase within typical LED operating tolerances. The substitute provides higher brightness (1200mcd versus 350mcd) and operates at a narrower viewing angle (34° versus 40°). These electrical and optical differences must be evaluated against specific circuit requirements and application constraints.

Frequently Asked Questions (FAQ)

Q: Can the WP710A10SYT directly replace the SLI-343YC3F without circuit modifications?

A: Both parts share identical mounting type (through-hole radial T-1), lens style (round domed top), and test current (20mA). The forward voltage difference (2V versus 1.9V) and brightness increase (1200mcd versus 350mcd) require circuit evaluation. Series resistor values may require adjustment to maintain consistent current limiting and brightness levels in the application.

Q: What are the key differences between these parts?

A: The primary differences are forward voltage (1.9V versus 2V), brightness rating (350mcd versus 1200mcd), viewing angle (40° versus 34°), and product status (Not For New Designs versus Active). Dominant wavelengths are closely matched (587nm versus 590nm), both within the yellow spectrum.

Q: Are both parts compliant with current regulations?

A: Yes. Both the SLI-343YC3F and WP710A10SYT are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the significance of the product status difference?

A: The SLI-343YC3F is marked "Not For New Designs," indicating Rohm Semiconductor is not recommending this part for new applications. The WP710A10SYT carries an Active status, confirming Kingbright's ongoing support and supply commitment for this component.

Q: Are the physical dimensions compatible?

A: Both parts use T-1 through-hole radial packages with round domed tops. Lens diameters are 3.10mm (SLI-343YC3F) and 3mm (WP710A10SYT), and maximum heights are 5.60mm and 5.90mm respectively. These minor dimensional variations are within standard PCB design tolerances for through-hole LED applications.