SLR-56DC3F LED Orange Clear T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The SLR-56DC3F is an orange LED indicator from Rohm Semiconductor designed for discrete indication applications. This T-1 3/4 through-hole component operates at 2V forward voltage with 25mcd brightness and a 605nm dominant wavelength. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts may be required due to inventory constraints, regional availability, or specific application requirements where alternative wavelengths or brightness levels are acceptable within system design parameters.

Substiute Parts

SLR-56DC3F

Rohm SemiconductorIn Stock: 1252SLR-56DC3F Datasheet

Current PartRFQ

HLMP-3451

Broadcom LimitedIn Stock: 20873HLMP-3451 Datasheet

SimilarRFQ

HLMP-3451-D0000

Broadcom LimitedIn Stock: 22968HLMP-3451-D0000 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

Substitution eligibility for the SLR-56DC3F is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Lens Size: 5mm, T-1 3/4 (physical form factor)
• Mounting Type: Through Hole (circuit board integration)
• Package / Case: Radial (lead configuration)
• Voltage - Forward (Vf): 2V nominal (circuit compatibility)
• Current - Test: 10mA or 20mA (driver circuit tolerance)

Application-Dependent Parameters:

• Color: Orange (visual indication function)
• Wavelength - Dominant: 605nm (spectral requirement)
• Millicandela Rating: 25mcd (brightness level)
• Lens Transparency: Clear (optical clarity)

The substitute parts listed below maintain the mandatory compatibility parameters. However, they differ in color (yellow wavelength), brightness (3.6mcd to 80mcd range), and test current specifications. These differences require circuit design verification to confirm acceptability within the target application.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active production status and ROHS3 compliance, meeting regulatory requirements equivalent to the SLR-56DC3F.

HLMP-3451 and HLMP-3451-D0000 (Broadcom): These parts share identical electrical specifications (2V forward voltage, 10mA test current) with the main part. However, they operate at 585nm yellow wavelength with significantly reduced brightness (3.6mcd versus 25mcd). The diffused lens transparency differs from the clear lens of the SLR-56DC3F. The reduced height (6.35mm) may affect mechanical fit in applications with height constraints. Selection requires confirmation that yellow indication is functionally acceptable and that reduced brightness meets visibility requirements.

SSL-LX5093YT (Lumex Opto/Components Inc.): This part operates at 2.1V forward voltage with 20mA test current, requiring circuit design adjustment from the 2V/10mA specification of the SLR-56DC3F. Brightness is elevated to 40mcd with clear lens transparency. The 585nm peak wavelength provides yellow indication. Height specification (8.60mm) is compatible with the original part's mechanical envelope.

WP7113YT (Kingbright): This part also requires 2.1V forward voltage and 20mA test current operation. It provides the highest brightness among substitutes at 80mcd with clear lens transparency and 588nm dominant wavelength. Height (8.60mm) is mechanically compatible. The narrower viewing angle (20° versus 40° of the original) may affect application suitability.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SLR-56DC3F with HLMP-3451 without circuit modification?

A: HLMP-3451 shares the same 2V forward voltage and 10mA test current specifications, allowing direct electrical substitution. However, the color change from orange (605nm) to yellow (585nm) and the reduced brightness (3.6mcd versus 25mcd) require functional validation that the application accepts yellow indication and reduced luminous intensity.

Q: What circuit changes are needed to use SSL-LX5093YT or WP7113YT?

A: Both parts operate at 2.1V forward voltage and 20mA test current, compared to the SLR-56DC3F specification of 2V and 10mA. Current-limiting resistor values must be recalculated to accommodate the higher test current. Forward voltage adjustment may be required depending on circuit topology and power supply specifications.

Q: Are the substitute parts physically compatible with the original PCB footprint?

A: All substitute parts use the same 5mm T-1 3/4 through-hole radial package. HLMP-3451 and HLMP-3451-D0000 have reduced maximum height (6.35mm versus 8.90mm), which may affect mechanical clearance in applications with tight vertical spacing. SSL-LX5093YT and WP7113YT have heights (8.60mm) within 0.3mm of the original, providing better mechanical compatibility.

Q: Does the lens transparency difference affect optical performance?

A: HLMP-3451 and HLMP-3451-D0000 feature diffused lenses, which scatter light over a wider area compared to the clear lenses of the SLR-56DC3F, SSL-LX5093YT, and WP7113YT. Diffused lenses reduce peak brightness but improve light distribution. Clear lenses concentrate light intensity in the specified viewing angle. Application requirements determine which transparency type is appropriate.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental and regulatory status of the SLR-56DC3F.

Q: What is the impact of different viewing angles on substitution?

A: The SLR-56DC3F specifies a 40° viewing angle. HLMP-3451 and HLMP-3451-D0000 provide 50° viewing angles due to diffused lens design. SSL-LX5093YT provides 30° and WP7113YT provides 20° viewing angles. Narrower viewing angles concentrate light intensity but reduce peripheral visibility. Application placement and visibility requirements determine acceptability.