SLR-343YCT32 Equivalent & Substitute Parts

Part Overview

The SLR-343YCT32 is a yellow LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This T-1 radial LED operates at 2.1V forward voltage with a 16mcd brightness rating and 585nm peak wavelength. The product is active and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while meeting the same application requirements.

Substiute Parts

SLR-343YCT32

Rohm SemiconductorIn Stock: 973SLR-343YCT32 Datasheet

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151031YS06000

Würth ElektronikIn Stock: 2948151031YS06000 Datasheet

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HLMP-Y901-J0000

Broadcom LimitedIn Stock: 842HLMP-Y901-J0000 Datasheet

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LTL1CHKFKNN

Lite-On Inc.In Stock: 44532LTL1CHKFKNN Datasheet

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LTL1CHKSKNN

Lite-On Inc.In Stock: 1610LTL1CHKSKNN Datasheet

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WP710A10NC

KingbrightIn Stock: 22224WP710A10NC Datasheet

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WP710A10YC

KingbrightIn Stock: 2999WP710A10YC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-343YCT32 is determined by the following criteria:

Primary Substitution Criteria:

• Mounting Type: Through Hole (radial configuration)
• Package / Case: Radial
• Supplier Device Package: T-1 or equivalent 3mm round form factor
• Voltage - Forward (Vf): 2.0V to 2.1V range
• Color: Yellow (primary) or functionally equivalent wavelength in yellow spectrum (585nm–592nm)
• Lens Transparency: Clear or diffused (both acceptable for indication applications)
• RoHS Status: ROHS3 Compliant
• Product Status: Active

Secondary Compatibility Parameters:

• Lens Size: 3.0mm to 3.10mm diameter
• Height (Max): 5.20mm to 5.90mm
• Current - Test: 10mA to 20mA operational range

Parts meeting these criteria are classified as direct substitutes. Parts with different colors (orange) or significantly different electrical parameters are listed for reference but require application-level verification before substitution.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Yellow, Clear Lens, T-1 Package):

WP710A10YC (Kingbright) and LTL1CHKSKNN (Lite-On Inc.) are functionally equivalent substitutes for the SLR-343YCT32. Both maintain yellow color specification, clear lens transparency, T-1 radial package configuration, and ROHS3 compliance. Forward voltage remains within acceptable range (2.05V–2.1V). Brightness ratings are higher (30mcd and 320mcd respectively), which is acceptable for indication applications where the main part operates at 16mcd. All parts are active products with unlimited moisture sensitivity rating.

Alternative Substitute (Yellow, Diffused Lens, 3mm Round Package):

151031YS06000 (Würth Elektronik) provides yellow LED functionality with diffused lens transparency and equivalent electrical performance (2V forward voltage). The diffused lens characteristic alters light distribution compared to the clear lens main part. This part maintains T-1 equivalent form factor and ROHS3 compliance. Selection of this part requires confirmation that diffused lens behavior is acceptable for the application.

Reference Parts (Different Color - Orange):

HLMP-Y901-J0000 (Broadcom Limited) and WP710A10NC (Kingbright) are orange LEDs with different wavelength characteristics (605nm–611nm range). These parts are listed in the substitute database but represent a color change from the main part specification. Orange wavelength is outside the yellow specification range and requires explicit application-level approval before substitution.

Frequently Asked Questions (FAQ)

Q: Can WP710A10YC replace SLR-343YCT32 directly?

A: Yes. WP710A10YC meets all primary substitution criteria: yellow color, clear lens, T-1 radial package, 2.1V forward voltage, ROHS3 compliance, and active product status. The higher brightness rating (30mcd vs. 16mcd) is acceptable for indication applications.

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

A: Clear lens (SLR-343YCT32, WP710A10YC, LTL1CHKSKNN) provides focused light output with defined viewing angle. Diffused lens (151031YS06000) scatters light over a wider area with reduced peak intensity. Selection depends on application visibility requirements and viewing angle specifications.

Q: Are orange LED parts (HLMP-Y901-J0000, WP710A10NC) acceptable substitutes?

A: Orange LEDs operate at different wavelengths (605nm–611nm) compared to the yellow specification (585nm–592nm). These parts are mechanically and electrically compatible but represent a color change. Substitution requires application-level verification that orange indication is functionally equivalent to yellow in the target circuit.

Q: What is the significance of the 10mA vs. 20mA test current difference?

A: The main part (SLR-343YCT32) is specified at 10mA test current, while most substitutes operate at 20mA. Both values fall within standard LED operating ranges. The higher test current in substitutes results in higher brightness ratings. Circuit design must confirm that the selected part's brightness and current requirements are compatible with the application's power budget and visibility needs.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts in this comparison—SLR-343YCT32, WP710A10YC, LTL1CHKSKNN, 151031YS06000, HLMP-Y901-J0000, and WP710A10NC—are ROHS3 compliant and maintain REACH unaffected status where specified.

Q: Can height differences (5.20mm to 5.90mm) affect PCB layout?

A: Yes. Height variation of up to 0.70mm may impact PCB clearance, component spacing, and enclosure fit. Verify that the selected substitute's maximum height (5.20mm for LTL1CHKSKNN to 5.90mm for WP710A10YC) is compatible with the original design's mechanical constraints before final selection.

Q: What inventory considerations apply to these substitutes?

A: WP710A10YC (2,910 pcs), LTL1CHKSKNN (1,500 pcs), and 151031YS06000 (2,929 pcs) have comparable availability to the main part (867 pcs). HLMP-Y901-J0000 (817 pcs) and WP710A10NC (22,150 pcs) offer alternative availability profiles. Inventory levels should be confirmed at time of procurement.