SLR-56YCT32 Equivalent & Substitute Parts

Part Overview

The SLR-56YCT32 is a yellow LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This T-1 3/4 radial LED operates at 2.1V forward voltage with a 25mcd brightness rating and features a clear lens for direct light emission at 587nm wavelength. The part is currently active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

SLR-56YCT32

Rohm SemiconductorIn Stock: 918SLR-56YCT32 Datasheet

Current PartRFQ

HLMP-3451

Broadcom LimitedIn Stock: 20873HLMP-3451 Datasheet

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HLMP-3451-D0000

Broadcom LimitedIn Stock: 22968HLMP-3451-D0000 Datasheet

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LTL-307YE

Lite-On Inc.In Stock: 7691LTL-307YE Datasheet

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SSL-LX5093YT

Lumex Opto/Components Inc.In Stock: 12329SSL-LX5093YT Datasheet

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WP7113YT

KingbrightIn Stock: 15396WP7113YT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLR-56YCT32 are qualified based on the following criteria:

Primary Compatibility Parameters:

• Color: Yellow
• Mounting Type: Through Hole (Radial configuration)
• Supplier Device Package: T-1 3/4
• Voltage - Forward (Vf): 2.0V to 2.1V range
• Lens Size: 5mm diameter
• RoHS3 Compliance: Required
• Product Status: Active

Secondary Consideration Parameters:

• Wavelength range: 583nm to 590nm (yellow spectrum)
• Lens Transparency: Clear or Diffused acceptable
• Current - Test: 10mA to 20mA operating range
• Viewing Angle: 20° to 50°
• Millicandela Rating: 3.6mcd to 80mcd

Substitutes are grouped into two categories: direct equivalents with clear lens transparency matching the original specification, and functional alternatives with diffused lens transparency that maintain electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active production status and full RoHS3 compliance, ensuring regulatory and supply chain continuity with the original SLR-56YCT32 specification.

Clear Lens Direct Equivalents: LTL-307YE, SSL-LX5093YT, and WP7113YT maintain the clear lens transparency of the original part. These substitutes operate within the 2.1V forward voltage specification and preserve the yellow wavelength range (585nm to 590nm). Height specifications remain compatible with 8.60mm maximum dimension, within 0.30mm of the original 8.90mm specification.

Diffused Lens Alternatives: HLMP-3451 and HLMP-3451-D0000 provide functional substitution with diffused lens transparency. These parts operate at 2V forward voltage, within acceptable tolerance of the 2.1V specification. The 6.35mm maximum height represents a 2.55mm reduction from the original specification, suitable for applications with vertical space constraints. The 50° viewing angle provides wider light distribution compared to the original 40° specification.

Brightness Considerations: Substitute parts span a brightness range from 3.6mcd to 80mcd. The original SLR-56YCT32 operates at 25mcd. Selection should account for application-specific brightness requirements and circuit current limitations.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3451 or HLMP-3451-D0000 be used as direct replacements for SLR-56YCT32?

A: These Broadcom parts are electrically compatible within the 2V to 2.1V forward voltage range and maintain T-1 3/4 through-hole radial mounting. The primary difference is lens transparency: HLMP-3451 and HLMP-3451-D0000 feature diffused lenses compared to the clear lens of SLR-56YCT32. This affects light distribution characteristics. The 6.35mm maximum height is 2.55mm shorter than the original 8.90mm specification, which may impact PCB layout in space-constrained designs.

Q: What is the brightness difference between SLR-56YCT32 and its substitutes?

A: The original SLR-56YCT32 operates at 25mcd. Substitute options range from 3.6mcd (HLMP-3451 series) to 80mcd (WP7113YT). Circuit design must account for these variations. Lower brightness substitutes (3.6mcd) require applications tolerant of reduced light output. Higher brightness substitutes (40mcd to 80mcd) may require current limiting adjustments to prevent over-driving the LED.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts—HLMP-3451, HLMP-3451-D0000, LTL-307YE, SSL-LX5093YT, and WP7113YT—maintain ROHS3 compliance matching the original SLR-56YCT32 specification.

Q: What is the difference between LTL-307YE, SSL-LX5093YT, and WP7113YT?

A: All three parts maintain clear lens transparency and 2.1V forward voltage matching the original specification. Differences exist in brightness rating and viewing angle. LTL-307YE and SSL-LX5093YT both operate at 40mcd with 40° and 30° viewing angles respectively. WP7113YT provides 80mcd brightness with a narrower 20° viewing angle. Selection depends on application requirements for light intensity and beam spread.

Q: Can substitute parts with different test currents (10mA vs 20mA) be used interchangeably?

A: Test current specifications indicate the measurement condition for brightness rating, not a requirement for circuit operation. All parts operate within the yellow LED forward voltage range (2V to 2.1V) and can be used in circuits designed for standard LED operation. Circuit current limiting must be independently calculated based on supply voltage and desired operating point.

Q: What is the significance of wavelength differences between parts?

A: All substitute parts operate within the yellow spectrum range (583nm to 590nm), with dominant wavelengths between 585nm and 588nm. These variations are imperceptible to human vision and do not affect functional compatibility in indication applications. Wavelength selection becomes relevant only in applications requiring specific spectral characteristics for optical filtering or sensor compatibility.