WP63SRT LED Red Clear T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The WP63SRT is a red LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This component features a clear lens with 5mm T-1 3/4 form factor and 250mcd brightness rating at 20mA test current. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs. Substitute parts must maintain compatibility with through-hole mounting, radial package configuration, and the specified electrical operating parameters.

Substiute Parts

WP63SRT

KingbrightIn Stock: 1002WP63SRT Datasheet

Current PartRFQ

WP63SURDK

KingbrightIn Stock: 2726WP63SURDK Datasheet

MFR RecommendedRFQ

SSL-LX5063SRD

Lumex Opto/Components Inc.In Stock: 829SSL-LX5063SRD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP63SRT are selected based on the following compatibility criteria:

Primary Compatibility Parameters:

• Color: Red
• Lens Size: 5mm, T-1 3/4
• Mounting Type: Through Hole
• Package Configuration: Radial
• Current - Test: 20mA
• RoHS Compliance: ROHS3 Compliant

Secondary Consideration Parameters:

• Voltage - Forward (Vf): Range 1.7V to 1.95V acceptable
• Millicandela Rating: 250mcd to 700mcd range
• Wavelength - Peak: 645nm to 660nm range
• Viewing Angle: 30° to 60° range

Substitutes are grouped into two categories: MFR Recommended (manufacturer-endorsed direct replacement) and Similar (functionally equivalent with parameter variations within acceptable ranges).

Parameter Comparison

Engineering Selection Recommendations

WP63SURDK (MFR Recommended Substitute):

The WP63SURDK is the manufacturer-recommended replacement for the obsolete WP63SRT. Both components are manufactured by Kingbright and share identical mechanical form factors (5mm T-1 3/4 through-hole radial package). The WP63SURDK maintains active product status and full ROHS3 compliance. Primary differences include lens transparency (diffused versus clear) and increased brightness (700mcd versus 250mcd). Forward voltage is 1.95V compared to 1.85V, representing a 0.1V increase within typical LED operating tolerances. The expanded 60° viewing angle accommodates broader light distribution applications. This substitute is suitable for direct replacement in applications where increased brightness and wider viewing angle are acceptable or beneficial.

SSL-LX5063SRD (Similar Substitute):

The SSL-LX5063SRD from Lumex Opto/Components Inc. provides an alternative substitute option with active product status and ROHS3 compliance. This component maintains the 5mm T-1 3/4 through-hole radial package configuration. The SSL-LX5063SRD operates at 1.7V forward voltage (0.15V lower than the main part) and provides 300mcd brightness with 60° viewing angle. Peak wavelength is 660nm, within the acceptable red spectrum range. This substitute is applicable in applications where lower forward voltage operation is advantageous or where the diffused lens and moderate brightness level align with system requirements.

Frequently Asked Questions (FAQ)

Q: Can the WP63SURDK directly replace the WP63SRT without circuit modifications?

A: The WP63SURDK is mechanically and electrically compatible for direct replacement in through-hole applications. The forward voltage difference (1.95V versus 1.85V) is within standard LED operating tolerances and does not require circuit redesign. However, the increased brightness (700mcd versus 250mcd) and diffused lens may alter visual appearance in the application. Verify that increased brightness is acceptable for your specific use case.

Q: What is the primary difference between the WP63SRT and WP63SURDK?

A: The main differences are lens transparency (clear versus diffused), brightness rating (250mcd versus 700mcd), and viewing angle (30° versus 60°). Both maintain identical 5mm T-1 3/4 form factor, through-hole mounting, and radial package configuration. Forward voltage increases from 1.85V to 1.95V.

Q: Is the SSL-LX5063SRD suitable for applications requiring the original WP63SRT specifications?

A: The SSL-LX5063SRD is mechanically compatible and maintains the 5mm T-1 3/4 through-hole radial package. It operates at lower forward voltage (1.7V) and provides comparable brightness (300mcd). The diffused lens and 60° viewing angle differ from the original clear lens and 30° angle. This substitute is suitable where these parameter variations are acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The WP63SURDK and SSL-LX5063SRD are both ROHS3 compliant, matching the compliance status of the original WP63SRT component.

Q: What packaging format is available for the WP63SURDK?

A: The WP63SURDK is supplied in Tape & Reel (TR) packaging format, differing from the main part's standard packaging designation. Verify that tape and reel format is compatible with your assembly process.

Q: Can I use the SSL-LX5063SRD in applications sensitive to forward voltage variation?

A: The SSL-LX5063SRD operates at 1.7V forward voltage, which is 0.15V lower than the WP63SRT (1.85V). If your circuit design includes current-limiting resistors calculated for the original voltage, the lower forward voltage will result in slightly higher LED current at the same supply voltage. Recalculate current-limiting resistor values if precise current control is required.