WP1503IT Red LED T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The WP1503IT is an active production red LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This T-1 3/4 form factor LED operates at 2V forward voltage with a 50mcd brightness rating and 617nm dominant wavelength. The component is RoHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and consumer electronics applications.

Equivalent and substitute parts are identified based on matching mechanical form factor (T-1 3/4, 5mm diameter through-hole radial package), electrical operating parameters (forward voltage, test current), and optical characteristics (red spectrum wavelength, lens configuration). Substitutes maintain compatibility with standard LED circuit designs while accommodating minor variations in brightness and wavelength specifications.

Substiute Parts

WP1503IT

KingbrightIn Stock: 859WP1503IT Datasheet

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HLMP-D155

Broadcom LimitedIn Stock: 9365HLMP-D155 Datasheet

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SLR-56VC3F

Rohm SemiconductorIn Stock: 3145SLR-56VC3F Datasheet

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SSL-LX5093HT

Lumex Opto/Components Inc.In Stock: 1666SSL-LX5093HT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP1503IT are qualified based on the following criteria:

Mechanical Compatibility: All substitutes maintain the T-1 3/4 form factor with 5mm diameter lens and through-hole radial mounting configuration, ensuring direct PCB footprint compatibility.

Electrical Operating Range: Substitutes operate within acceptable forward voltage tolerance (1.7V to 2V) and test current specifications (1mA to 20mA), allowing integration into standard LED indicator circuits without circuit redesign.

Optical Characteristics: All substitutes emit red spectrum light (dominant wavelength 617nm to 640nm, peak wavelength 627nm to 700nm) with clear lens transparency, maintaining visual indication functionality across the red spectrum range.

Regulatory Compliance: All substitutes carry RoHS3 compliance, REACH unaffected status, and MSL 1 rating, matching the environmental and handling requirements of the primary part.

Product Status: All substitutes maintain active production status, ensuring ongoing availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

SSL-LX5093HT (Lumex Opto/Components Inc.): This substitute provides the closest electrical and optical match to the WP1503IT. Both parts operate at 2V forward voltage with 20mA test current, 25mcd brightness rating, and identical 30° viewing angle. Physical dimensions are equivalent (8.60mm height). This substitute is recommended for direct replacement in applications where brightness and wavelength specifications are non-critical.

SLR-56VC3F (Rohm Semiconductor): This substitute operates at matching 2V forward voltage with 10mA test current. The 25mcd brightness rating and 40° viewing angle provide wider light distribution compared to the primary part. Height specification (8.90mm) remains within acceptable PCB clearance tolerances. This substitute is suitable for applications requiring wider viewing angle characteristics.

HLMP-D155 (Broadcom Limited): This substitute operates at reduced forward voltage (1.7V) with significantly lower test current (1mA) and brightness rating (10mcd). The 12.44mm maximum height exceeds the primary part specification and may present PCB layout constraints. This substitute is applicable only in applications where lower brightness and reduced power consumption are acceptable design parameters, and where increased height does not conflict with mechanical constraints.

All substitutes maintain RoHS3 compliance, REACH unaffected status, and active production status, ensuring regulatory alignment and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the HLMP-D155 be used as a direct replacement for the WP1503IT?

A: The HLMP-D155 maintains mechanical compatibility (T-1 3/4 package, 5mm lens, through-hole mounting) and regulatory compliance (RoHS3, REACH unaffected). However, the 12.44mm maximum height exceeds the WP1503IT specification (8.60mm), which may create PCB clearance issues. Additionally, the 1.7V forward voltage and 1mA test current differ from the primary part, requiring circuit verification. The 10mcd brightness rating is significantly lower than the 50mcd primary specification.

Q: Which substitute provides the best brightness match?

A: The SSL-LX5093HT and SLR-56VC3F both provide 25mcd brightness ratings, which is lower than the WP1503IT (50mcd). The WP1503IT remains the highest brightness option among the listed parts. Substitutes should be selected based on application brightness requirements rather than brightness matching.

Q: Are all substitutes suitable for the same circuit design?

A: The SSL-LX5093HT and SLR-56VC3F operate at 2V forward voltage, matching the WP1503IT circuit design. The HLMP-D155 operates at 1.7V forward voltage and 1mA test current, which may require circuit current-limiting resistor recalculation. Circuit verification is necessary when substituting the HLMP-D155.

Q: What is the primary difference in wavelength between these parts?

A: The WP1503IT features 617nm dominant wavelength (627nm peak). Substitutes range from 630nm to 640nm dominant wavelength (660nm to 700nm peak). All parts emit red spectrum light suitable for standard red LED indicator applications. Wavelength differences may produce subtle color variations in visual appearance.

Q: Do all substitutes maintain the same viewing angle?

A: The WP1503IT and SSL-LX5093HT both specify 30° viewing angle. The SLR-56VC3F provides 40° viewing angle for wider light distribution. The HLMP-D155 specifies 24° viewing angle for narrower light distribution. Viewing angle selection depends on application requirements for light beam spread.

Q: Are height differences significant for PCB layout?

A: The WP1503IT, SSL-LX5093HT, and SLR-56VC3F maintain heights between 8.60mm and 8.90mm, suitable for standard PCB clearance designs. The HLMP-D155 (12.44mm height) may exceed clearance specifications in compact designs. Height verification against PCB layout constraints is necessary before substitution.