Equivalent & Substitute Parts for R5YD

Part Overview

The R5YD is a yellow diffused LED indicator manufactured by Bivar Inc., designed for through-hole mounting applications requiring discrete 2V radial configuration. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance requirements. The R5YD delivers 8mcd brightness with a 120° viewing angle and operates at 20mA test current, suitable for standard LED indication circuits.

Substiute Parts

R5YD

Bivar Inc.In Stock: 812R5YD Datasheet

Current PartRFQ

XSUY18D

SunLEDIn Stock: 18460XSUY18D Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the R5YD are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Yellow
• Lens Transparency: Diffused
• Lens Style: Rectangle with Flat Top
• Mounting Type: Through Hole
• Package Configuration: Radial
• Wavelength Range: 588nm–590nm (peak)
• Height (Max): 7.00mm
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Forward Voltage (Vf): 1.95V–2V range
• Test Current: 10mA–20mA range
• Viewing Angle: 110°–120° range
• Millicandela Rating: 4mcd–8mcd range

The XSUY18D from SunLED meets all primary compatibility criteria and operates within acceptable secondary parameter ranges, qualifying it as a direct substitute for the obsolete R5YD.

Parameter Comparison

Engineering Selection Recommendations

The XSUY18D from SunLED is a qualified substitute for the obsolete R5YD based on the following engineering factors:

Compliance and Regulatory Status: The XSUY18D holds active product status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory alignment for current manufacturing standards. Both parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications.

Functional Compatibility: Both components operate within compatible electrical ranges. The XSUY18D forward voltage of 1.95V is within 0.05V of the R5YD specification, and the test current of 10mA represents a 50% reduction from the original 20mA, resulting in lower power consumption while maintaining indicator functionality.

Physical and Optical Characteristics: Identical mounting type (through hole), package configuration (radial), and maximum height (7.00mm) ensure mechanical compatibility with existing PCB designs. Both components feature diffused rectangular lenses with matching wavelength specifications at 590nm peak. The XSUY18D lens dimensions (5.00mm x 2.00mm) are marginally larger than the R5YD (4.90mm x 1.90mm), remaining within acceptable tolerance for standard through-hole applications.

Brightness Consideration: The XSUY18D millicandela rating of 4mcd is 50% lower than the R5YD at 8mcd. This reduction is offset by the lower test current requirement and remains suitable for standard indication applications where the original 8mcd specification was not a critical design constraint.

Inventory and Availability: The XSUY18D maintains substantial active inventory (18,395 pcs), providing supply continuity for the obsolete R5YD.

Frequently Asked Questions (FAQ)

Q: Can the XSUY18D directly replace the R5YD without circuit modifications?

A: The XSUY18D is electrically and mechanically compatible with the R5YD for standard through-hole LED indication circuits. The forward voltage difference of 0.05V and reduced test current of 10mA (versus 20mA) are within acceptable operating ranges for typical current-limiting resistor designs. No circuit modifications are required for basic substitution.

Q: What is the impact of the reduced millicandela rating (4mcd vs. 8mcd)?

A: The XSUY18D provides 50% of the original brightness. This reduction is acceptable for standard LED indication applications where the indicator serves as a status light rather than a high-visibility warning element. Applications requiring the original 8mcd brightness specification should evaluate alternative parts with higher millicandela ratings.

Q: Are there physical mounting differences between the R5YD and XSUY18D?

A: Both components use identical through-hole radial mounting with 7.00mm maximum height. The XSUY18D lens dimensions (5.00mm x 2.00mm) are slightly larger than the R5YD (4.90mm x 1.90mm), but this difference does not affect PCB hole compatibility or standard mounting practices.

Q: What is the viewing angle difference, and does it affect functionality?

A: The XSUY18D viewing angle is 110° compared to the R5YD at 120°. This 10° reduction represents a minor narrowing of the visible light cone. For applications where the indicator is viewed from directly in front of the component, this difference is negligible. Applications requiring wide-angle visibility should evaluate the specific viewing geometry.

Q: Does the XSUY18D meet current regulatory requirements?

A: Yes. The XSUY18D holds ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory standards. The R5YD, classified as obsolete, may not meet current manufacturing directives.

Q: What is the packaging difference between the two parts?

A: The R5YD packaging is listed as a dash (not specified), while the XSUY18D is supplied in bulk packaging with rectangular 2mmx5mm supplier device package designation. Both use radial through-hole configuration suitable for standard PCB assembly.