SSF-EX2573YD-TR Yellow LED Equivalent & Substitute Parts

Part Overview

The SSF-EX2573YD-TR is a yellow diffused LED manufactured by Lumex Opto/Components Inc., designed for discrete indication applications. This through-hole component features a rectangular lens (5.00mm x 2.00mm) with a flat top and operates at a forward voltage of 2.1V with a test current of 20mA. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Substiute Parts

SSF-EX2573YD-TR

Lumex Opto/Components Inc.In Stock: 1180SSF-EX2573YD-TR Datasheet

Current PartRFQ

WP113YDT

KingbrightIn Stock: 3596WP113YDT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SSF-EX2573YD-TR is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Color: Yellow
• Lens Transparency: Diffused
• Lens Style: Rectangle with Flat Top
• Lens Size: 5.00mm x 2.00mm
• Voltage - Forward (Vf) (Typ): 2.1V
• Current - Test: 20mA
• Mounting Type: Through Hole
• Package / Case: Radial
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Millicandela Rating: Variation permitted within discrete indication application tolerance
• Viewing Angle: Variation permitted based on circuit design requirements
• Wavelength - Peak: Variation within yellow spectrum (580nm–590nm range)
• Height (Max): Minor variation acceptable within mechanical envelope constraints

The WP113YDT from Kingbright meets all mandatory matching criteria and is classified as an active product, making it a direct substitute for the obsolete SSF-EX2573YD-TR.

Parameter Comparison

Engineering Selection Recommendations

The WP113YDT from Kingbright is a direct functional equivalent for the obsolete SSF-EX2573YD-TR. Selection of this substitute is supported by the following engineering criteria:

Product Status & Supply Continuity: The SSF-EX2573YD-TR is classified as obsolete, creating supply risk for ongoing production and field service applications. The WP113YDT is an active product with confirmed inventory availability (3532 units in stock), ensuring reliable procurement for current and future requirements.

Electrical Compatibility: Both components operate at identical forward voltage (2.1V) and test current (20mA), ensuring direct circuit compatibility without modification to current-limiting resistor networks or power supply specifications.

Mechanical & Optical Compatibility: Identical lens dimensions (5.00mm x 2.00mm), lens style (rectangle with flat top), and mounting type (through-hole radial) ensure mechanical interchangeability within existing PCB layouts and mechanical assemblies. Height variation (7.20mm vs. 7.00mm) is within acceptable tolerance for standard through-hole applications.

Regulatory & Compliance Alignment: Both components maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

Optical Performance Considerations: The WP113YDT operates at 590nm peak wavelength (compared to 585nm for the original part), remaining within the yellow spectrum. The increased viewing angle (110° vs. 80°) provides broader visibility, while the reduced millicandela rating (4mcd vs. 10mcd) is acceptable for discrete indication applications where brightness variation is within acceptable tolerance.

Frequently Asked Questions (FAQ)

Q: Can the WP113YDT be used as a direct replacement for the SSF-EX2573YD-TR without PCB modifications?

A: Yes. Both components share identical electrical specifications (2.1V forward voltage, 20mA test current), mechanical dimensions (5.00mm x 2.00mm lens, 7.00–7.20mm height), and mounting type (through-hole radial). No circuit modifications are required.

Q: What is the difference in brightness between these two LEDs?

A: The SSF-EX2573YD-TR is rated at 10mcd, while the WP113YDT is rated at 4mcd. This difference is acceptable for discrete indication applications where the LED serves as a status indicator rather than a primary light source. Circuit design should account for this variation if brightness is a critical parameter.

Q: Are there differences in the wavelength output?

A: The SSF-EX2573YD-TR operates at 585nm peak wavelength, while the WP113YDT operates at 590nm peak wavelength. Both wavelengths fall within the yellow spectrum and are visually indistinguishable in standard indication applications.

Q: Does the increased viewing angle of the WP113YDT affect compatibility?

A: No. The WP113YDT provides a wider viewing angle (110° vs. 80°), which is a performance enhancement for indication applications. This does not create compatibility issues and may improve visibility in certain mounting orientations.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the SSF-EX2573YD-TR and WP113YDT are ROHS3 compliant and REACH unaffected, ensuring compatibility with current environmental and regulatory requirements.

Q: What is the inventory status of the substitute part?

A: The WP113YDT is an active product with 3532 units in stock, providing reliable supply availability. The original SSF-EX2573YD-TR is obsolete with limited remaining inventory (1092 units).

Q: Can the WP113YDT be used in high-temperature applications?

A: Operating temperature specifications are not provided in the available technical parameters. Thermal performance requirements should be evaluated against the complete datasheet specifications for both components.

Q: Is the WP113YDT available in alternative packaging options?

A: The WP113YDT is supplied in bulk packaging. The original SSF-EX2573YD-TR packaging specification is not detailed in the available parameters. Packaging requirements should be confirmed with the supplier.