SLI-343YCT32 Equivalent & Substitute Parts

Part Overview

The SLI-343YCT32 is a yellow LED indicator from Rohm Semiconductor designed for through-hole applications. This T-1 package discrete LED operates at 1.9V forward voltage with a 350mcd brightness rating and 587nm dominant wavelength. The product is currently active and widely used in indication circuits requiring standard yellow light output with clear lens transparency.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements allow for alternative specifications within acceptable electrical and mechanical tolerances.

Substiute Parts

SLI-343YCT32

Rohm SemiconductorIn Stock: 776SLI-343YCT32 Datasheet

Current PartRFQ

WP710A10SYT

KingbrightIn Stock: 2039WP710A10SYT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLI-343YCT32 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Yellow
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Package / Case: Radial (T-1 configuration)
• Current - Test: 20mA
• RoHS Status: ROHS3 Compliant
• Product Status: Active

Allowable Variation Parameters:

• Voltage - Forward (Vf): ±0.2V tolerance acceptable for series-limited circuit designs
• Millicandela Rating: Brightness variations permitted based on application requirements
• Wavelength - Dominant: Yellow spectrum range (587nm–590nm) acceptable
• Viewing Angle: Variations permitted based on optical design requirements
• Height (Max): Physical height within T-1 package standard

The WP710A10SYT from Kingbright meets all primary compatibility criteria and operates within allowable variation parameters for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the SLI-343YCT32 and WP710A10SYT are active products with ROHS3 compliance and REACH unaffected status, making them suitable for current production designs.

SLI-343YCT32 Selection Criteria:

• Primary choice when forward voltage specification of 1.9V is critical to circuit design
• Applications requiring 350mcd brightness level
• Designs optimized for 40° viewing angle
• Rohm Semiconductor supply chain preference

WP710A10SYT Selection Criteria:

• Alternative when SLI-343YCT32 availability is constrained
• Applications tolerating 2V forward voltage in series-limited designs
• Designs benefiting from higher brightness output (1200mcd)
• Designs tolerating 34° viewing angle
• Kingbright supply chain availability

Both parts maintain identical mounting type, package configuration, and test current specifications. Forward voltage difference of 0.1V is manageable in standard LED indicator circuits using current-limiting resistors.

Frequently Asked Questions (FAQ)

Q: Can WP710A10SYT directly replace SLI-343YCT32 in existing PCB designs?

A: Physical and electrical compatibility is confirmed for through-hole mounting. The 0.1V forward voltage difference requires circuit verification if the design uses fixed voltage supplies without current-limiting resistors. The higher brightness (1200mcd vs 350mcd) may require optical design review for applications with specific brightness requirements.

Q: What is the wavelength difference between these parts?

A: SLI-343YCT32 operates at 587nm dominant wavelength, while WP710A10SYT operates at 590nm. Both wavelengths fall within the yellow spectrum and are visually indistinguishable in standard indication applications.

Q: Are there packaging differences between these parts?

A: Both parts use T-1 radial through-hole packages. Maximum height differs by 0.3mm (5.60mm vs 5.90mm), which is within standard PCB clearance tolerances for most applications.

Q: Do both parts meet current compliance requirements?

A: Both SLI-343YCT32 and WP710A10SYT are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What is the viewing angle impact of substitution?

A: SLI-343YCT32 provides 40° viewing angle while WP710A10SYT provides 34°. This 6° difference may affect applications requiring wide-angle visibility. Standard indicator applications typically tolerate this variation.