SLB-25YY3F Yellow LED Through-Hole Equivalent & Substitute Parts

Part Overview

The SLB-25YY3F is a yellow diffused through-hole LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 587nm. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support, maintenance, and design continuity. The part operates at a forward voltage of 2.1V with a test current of 10mA and features a rectangular lens configuration measuring 5.00mm x 2.00mm.

Substiute Parts

SLB-25YY3F

Rohm SemiconductorIn Stock: 944SLB-25YY3F Datasheet

Current PartRFQ

5219452F

DialightIn Stock: 57565219452F Datasheet

DirectRFQ

LTL-433Y

Lite-On Inc.In Stock: 761LTL-433Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLB-25YY3F are identified based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

• 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: 10mA
• Mounting Type: Through Hole
• Package / Case: Radial
• Wavelength - Dominant: 587nm to 590nm (yellow spectrum range)
• RoHS Status: ROHS3 Compliant

Two substitute parts meet these criteria and are classified as direct or similar equivalents based on parameter alignment.

Parameter Comparison

Engineering Selection Recommendations

5219452F (Dialight) qualifies as a direct substitute. This part maintains identical electrical specifications (2.1V forward voltage, 10mA test current), mechanical form factor (5.00mm x 2.00mm rectangular diffused lens), and mounting configuration (through-hole radial package). The dominant wavelength of 588nm remains within the yellow spectrum range. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. The maximum height of 7.50mm is 0.20mm lower than the original, which is within acceptable mechanical tolerance for through-hole applications. Inventory availability is 5691 pieces.

LTL-433Y (Lite-On Inc.) qualifies as a similar substitute. This part matches all critical electrical and mechanical parameters, with a dominant wavelength of 590nm remaining within acceptable yellow spectrum range. The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Maximum height is 7.50mm. Inventory availability is 724 pieces.

Both substitute parts exhibit higher millicandela ratings (3.7mcd) compared to the original SLB-25YY3F (1mcd), indicating increased luminous intensity. Both substitute parts have a viewing angle of 140° compared to the original 160°, representing a narrower field of view.

Frequently Asked Questions (FAQ)

Q: Can 5219452F and LTL-433Y be used interchangeably with SLB-25YY3F?

A: Both parts meet the core electrical and mechanical substitution criteria. They share identical forward voltage (2.1V), test current (10mA), lens configuration (5.00mm x 2.00mm rectangular diffused), and mounting type (through-hole radial). Wavelength values (588nm and 590nm respectively) remain within the yellow spectrum range. Circuit-level compatibility is established through these parameters.

Q: What are the differences in viewing angle between the main part and substitutes?

A: The SLB-25YY3F has a viewing angle of 160°, while both 5219452F and LTL-433Y have viewing angles of 140°. This represents a 20° reduction in horizontal viewing range. Applications requiring wide-angle light distribution should account for this difference in optical performance.

Q: How do the millicandela ratings differ?

A: The SLB-25YY3F is rated at 1mcd, while both 5219452F and LTL-433Y are rated at 3.7mcd. The substitute parts deliver approximately 3.7 times greater luminous intensity at the same test current (10mA). Applications sensitive to brightness levels should evaluate this increase in light output.

Q: Are there mechanical height differences?

A: The SLB-25YY3F has a maximum height of 7.70mm, while both substitute parts have maximum heights of 7.50mm. This 0.20mm difference is within standard mechanical tolerance for through-hole PCB applications and does not affect mounting compatibility.

Q: Do all parts meet current compliance standards?

A: Yes. The SLB-25YY3F, 5219452F, and LTL-433Y are all ROHS3 compliant with moisture sensitivity level 1 (unlimited). All parts carry REACH unaffected status and EAR99 ECCN classification.

Q: What is the wavelength difference between parts?

A: The SLB-25YY3F has a dominant wavelength of 587nm, 5219452F has 588nm, and LTL-433Y has 590nm. All values fall within the yellow spectrum range (typically 570nm to 590nm). The 3nm maximum variation is imperceptible to human vision in indication applications.