WP63YT Yellow LED T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The WP63YT is an active-status yellow LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This T-1 3/4 form factor component operates at 2.1V forward voltage with a 70mcd brightness rating and 588nm dominant wavelength. The part is RoHS3 compliant and REACH unaffected, suitable for standard indication circuits requiring yellow light output.

Substitute parts are necessary when the primary part experiences inventory constraints, extended lead times, or when design requirements permit operation within the specified parameter tolerances of alternative manufacturers' offerings.

Substiute Parts

WP63YT

KingbrightIn Stock: 857WP63YT Datasheet

Current PartRFQ

WP7113YT

KingbrightIn Stock: 15396WP7113YT Datasheet

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HLMP-3451

Broadcom LimitedIn Stock: 20873HLMP-3451 Datasheet

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LTL-307YE

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

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SLR-56DC3F

Rohm SemiconductorIn Stock: 1252SLR-56DC3F Datasheet

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SLR-56YC3F

Rohm SemiconductorIn Stock: 1709SLR-56YC3F Datasheet

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SSL-LX5093YT

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

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP63YT are grouped based on strict parameter compatibility within the following criteria:

Primary Compatibility Parameters:

• Color: Yellow (588nm wavelength range)
• Lens Transparency: Clear
• Lens Size: 5mm, T-1 3/4
• Mounting Type: Through Hole
• Package / Case: Radial
• Voltage - Forward (Vf): 2.1V ±0.1V tolerance
• RoHS3 Compliance: Required

Secondary Consideration Parameters:

• Millicandela Rating: Brightness variation acceptable within application tolerance
• Viewing Angle: Directional characteristics may vary
• Height (Max): Physical clearance constraints

Parts meeting all primary parameters are classified as direct substitutes. Parts with variations in secondary parameters remain functionally equivalent for standard indication applications but may require circuit or mechanical design verification.

Parameter Comparison

Engineering Selection Recommendations

WP7113YT (Kingbright) — Direct substitute with higher brightness output (80mcd vs. 70mcd). Identical electrical parameters (2.1V, 20mA, 588nm). Narrower viewing angle (20° vs. 30°). Increased height (8.60mm vs. 6.00mm) requires PCB clearance verification. RoHS3 compliant. Highest inventory availability (15343 pcs).

LTL-307YE (Lite-On Inc.) — Functionally equivalent with reduced brightness (40mcd vs. 70mcd). Identical electrical parameters (2.1V, 20mA, 588nm). Wider viewing angle (40° vs. 30°). Increased height (8.60mm vs. 6.00mm) requires PCB clearance verification. RoHS3 compliant. Suitable for applications where lower brightness is acceptable.

SLR-56YC3F (Rohm Semiconductor) — Functionally equivalent with reduced brightness (25mcd vs. 70mcd) and lower test current (10mA vs. 20mA). Wavelength 587nm (within yellow spectrum). Wider viewing angle (40° vs. 30°). Increased height (8.90mm vs. 6.00mm) requires PCB clearance verification. RoHS3 compliant. Lower inventory (1687 pcs).

SSL-LX5093YT (Lumex Opto/Components Inc.) — Functionally equivalent with reduced brightness (40mcd vs. 70mcd). Identical electrical parameters (2.1V, 20mA). Matching viewing angle (30°). Increased height (8.60mm vs. 6.00mm) requires PCB clearance verification. RoHS3 compliant. Good inventory availability (12279 pcs).

HLMP-3451 (Broadcom Limited) — Not recommended as primary substitute. Diffused lens (vs. clear), significantly reduced brightness (3.6mcd vs. 70mcd), lower forward voltage (2V vs. 2.1V), lower test current (10mA vs. 20mA), different wavelength (585nm), wider viewing angle (50° vs. 30°). Suitable only for applications with fundamentally different optical requirements.

Frequently Asked Questions (FAQ)

Q: Can WP7113YT replace WP63YT in all applications?

A: WP7113YT meets all primary electrical and mechanical compatibility parameters. The increased brightness (80mcd vs. 70mcd) and narrower viewing angle (20° vs. 30°) are secondary variations. Verify PCB clearance for the increased height (8.60mm vs. 6.00mm). No circuit modifications required.

Q: What is the impact of different millicandela ratings?

A: Millicandela rating determines perceived brightness. Lower ratings (LTL-307YE at 40mcd, SLR-56YC3F at 25mcd) produce dimmer indication. Higher ratings (WP7113YT at 80mcd) produce brighter indication. Select based on application visibility requirements and ambient lighting conditions.

Q: Are height differences critical?

A: WP63YT has maximum height of 6.00mm. Substitutes range from 8.60mm to 8.90mm. Verify PCB layout clearance above component mounting area. Height differences do not affect electrical function but may impact mechanical assembly and enclosure design.

Q: Why is HLMP-3451 listed as a substitute if it has different specifications?

A: HLMP-3451 is included in the original substitute list but does not meet primary compatibility criteria due to diffused lens, significantly lower brightness, and different wavelength. It is not recommended for direct substitution unless application requirements specifically permit diffused optics and reduced brightness.

Q: What viewing angle differences mean for circuit design?

A: Viewing angle determines the cone of light emission. Narrower angles (20°) concentrate light in a specific direction; wider angles (40-50°) distribute light over a broader area. Select based on observer position relative to the LED and desired visibility range. No circuit modifications required; this is an optical characteristic only.

Q: Are all substitutes RoHS3 compliant?

A: All listed substitutes are RoHS3 compliant and REACH unaffected, matching the WP63YT compliance status. No environmental or regulatory restrictions apply to substitution.

Q: Can I use SLR-56YC3F with lower test current (10mA vs. 20mA)?

A: SLR-56YC3F is specified at 10mA test current, producing 25mcd brightness. If circuit design permits operation at 20mA, brightness output will increase proportionally. Verify component thermal rating and circuit current capacity before increasing operating current above specification.