SSF-LXH475LGD LED Circuit Board Indicator Equivalent & Substitute Parts

Part Overview

The SSF-LXH475LGD is a quad high LED circuit board indicator manufactured by Lumex Opto/Components Inc. This component features four integrated green LEDs in a 3mm T-1 through-hole right-angle configuration with diffused green lens and domed top design. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and mechanical compatibility for ongoing production and maintenance applications.

Substiute Parts

SSF-LXH475LGD

Lumex Opto/Components Inc.In Stock: 896SSF-LXH475LGD Datasheet

Current PartRFQ

WP934SB/4GD

KingbrightIn Stock: 3890WP934SB/4GD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSF-LXH475LGD is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Configuration: 4 High
• Color: Green (x 4)
• Wavelength - Peak: 565nm
• Current Rating: 25mA
• Voltage Rating: 2.2V
• Lens Size: 3mm, T-1
• Mounting Type: Through Hole, Right Angle
• Lens Style: Round with Domed Top

Allowable Variation Parameters:

• Millicandela Rating: Substitute may differ within acceptable brightness tolerance
• Viewing Angle: Substitute may differ based on application requirements
• Lens Type: Diffused variants (green or tinted) are acceptable
• Manufacturer: Different manufacturers permitted if all mandatory parameters align

The WP934SB/4GD from Kingbright satisfies all mandatory parameters and is classified as an active product, making it a valid substitute for the obsolete SSF-LXH475LGD.

Parameter Comparison

Engineering Selection Recommendations

The WP934SB/4GD from Kingbright is the qualified substitute for the obsolete SSF-LXH475LGD. Selection is based on the following engineering criteria:

Product Status: The WP934SB/4GD maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete SSF-LXH475LGD.

Compliance Alignment: Both components maintain ROHS3 compliance and identical MSL ratings (1 - Unlimited), ensuring equivalent environmental and handling requirements.

Functional Equivalence: All critical electrical and mechanical parameters align between the two components, including configuration, color, wavelength, current, voltage, and mounting specifications.

Parameter Variations: The WP934SB/4GD exhibits reduced millicandela rating (25mcd versus 30mcd) and narrower viewing angle (40° versus 60°). These variations are within acceptable tolerance for circuit board indicator applications and do not compromise functional compatibility.

Inventory Availability: The WP934SB/4GD is available in higher stock quantities (3814 units) compared to the SSF-LXH475LGD (787 units), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can the WP934SB/4GD directly replace the SSF-LXH475LGD in existing circuit board designs?

A: Yes. Both components share identical mounting type (through-hole, right-angle), lens size (3mm T-1), voltage rating (2.2V), and current rating (25mA). No circuit modifications are required for direct substitution.

Q: What is the significance of the 5mcd brightness difference between the two parts?

A: The SSF-LXH475LGD provides 30mcd while the WP934SB/4GD provides 25mcd. This 5mcd reduction represents approximately 17% lower brightness. For circuit board indicator applications where relative brightness comparison is the primary function, this variation is acceptable. Applications requiring specific brightness thresholds should evaluate this parameter against design requirements.

Q: How does the 20° viewing angle reduction affect compatibility?

A: The SSF-LXH475LGD offers 60° viewing angle while the WP934SB/4GD offers 40° viewing angle. The narrower viewing angle of the substitute part restricts the angular range for optimal LED visibility. Applications requiring wide-angle visibility should evaluate this parameter. For standard circuit board indicator applications with fixed viewing positions, this variation is typically acceptable.

Q: Are there differences in lens appearance between the two parts?

A: The SSF-LXH475LGD features a diffused green lens, while the WP934SB/4GD features a diffused tinted lens. Both maintain the same round domed top style and 3mm size. The tinted lens variant may produce slightly different color perception but maintains the 565nm peak wavelength specification.

Q: What compliance certifications apply to both parts?

A: Both the SSF-LXH475LGD and WP934SB/4GD are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8541.41.0000. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both components.

Q: Why is the SSF-LXH475LGD classified as obsolete?

A: The SSF-LXH475LGD is listed as obsolete by the manufacturer. The WP934SB/4GD from Kingbright is an active product with equivalent specifications, making it the appropriate substitute for ongoing applications and new designs.