SSF-LXH475SGC LED Circuit Board Indicator Equivalent & Substitute Parts

Part Overview

The SSF-LXH475SGC is a 3mm LED Circuit Board Indicator manufactured by Lumex Opto/Components Inc., configured as a 4-high green LED assembly with clear lens and domed top. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement continuity. The part operates at 2.2V with 20mA current rating and 200mcd brightness output, designed for through-hole mounting applications in circuit board indicator applications.

Due to the obsolete status of the SSF-LXH475SGC, sourcing active equivalent components is essential for new production runs, design revisions, and long-term supply chain management.

Substiute Parts

SSF-LXH475SGC

Lumex Opto/Components Inc.In Stock: 867SSF-LXH475SGC Datasheet

Current PartRFQ

WP934SB/4GD

KingbrightIn Stock: 3890WP934SB/4GD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SSF-LXH475SGC is evaluated based on strict parameter matching within allowable tolerances for LED Circuit Board Indicator components. The following parameters establish substitution validity:

Critical Parameters (Must Match):

• Lens Size: 3mm, T-1 form factor
• Configuration: 4-high multi-LED assembly
• Color: Green wavelength family
• Wavelength - Peak: 565nm nominal
• Voltage Rating: 2.2V operating voltage
• RoHS Compliance: ROHS3 Compliant status

Allowable Parameter Variations:

• Current Rating: Substitute may operate at higher current (25mA vs. 20mA) provided circuit design accommodates increased power consumption
• Millicandela Rating: Substitute may have lower brightness (25mcd vs. 200mcd) for applications where reduced visibility is acceptable
• Viewing Angle: Substitute may have wider viewing angle (40° vs. 30°) without functional degradation
• Lens Type: Substitute may have diffused or tinted lens variant, altering optical appearance while maintaining functional indication capability
• Mounting Type: Substitute may feature right-angle configuration as alternative to standard through-hole orientation

The identified substitute WP934SB/4GD meets all critical parameters while introducing allowable variations in current, brightness, viewing angle, lens type, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The WP934SB/4GD is a valid substitute for the SSF-LXH475SGC based on matching critical electrical and optical parameters. Both components share identical lens size (3mm T-1), configuration (4-high), color (green), wavelength (565nm), and voltage rating (2.2V). Both maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Key Considerations:

1. Product Status: The SSF-LXH475SGC is obsolete; the WP934SB/4GD is active and currently in production with 3814 units in stock, ensuring procurement availability.

2. Current Rating Difference: The WP934SB/4GD operates at 25mA versus the original 20mA specification. Circuit designs must accommodate this 5mA increase in current consumption. Existing current-limiting resistor values should be recalculated to maintain proper LED operation within the substitute's rated parameters.

3. Brightness Output: The WP934SB/4GD provides 25mcd versus the original 200mcd. This represents a significant reduction in brightness output. Applications requiring the original 200mcd brightness level may experience reduced visibility with this substitute. Brightness-critical applications should evaluate whether the lower output meets functional requirements.

4. Optical Characteristics: The WP934SB/4GD features a diffused, tinted lens compared to the clear lens of the original part. This alters the optical appearance and light transmission characteristics. The wider 40° viewing angle (versus 30°) provides broader visibility range.

5. Mounting Configuration: The WP934SB/4GD offers right-angle mounting as an alternative to standard through-hole orientation. PCB layout modifications may be required if the right-angle configuration is selected.

6. Compliance: Both components maintain equivalent environmental and regulatory compliance (ROHS3, REACH Unaffected, MSL 1).

Selection Criteria:

• Select WP934SB/4GD when circuit design can accommodate 25mA current and reduced 25mcd brightness output is acceptable for the application.
• Verify PCB layout compatibility with right-angle mounting option if selected.
• Recalculate current-limiting resistor values for the 25mA rated current.
• Evaluate visual appearance impact of diffused, tinted lens versus clear lens in the application environment.

Frequently Asked Questions (FAQ)

Q: Can the WP934SB/4GD directly replace the SSF-LXH475SGC without circuit modifications?

A: Direct replacement is not recommended without circuit review. The WP934SB/4GD operates at 25mA versus the original 20mA specification. Current-limiting resistor values must be recalculated to ensure proper operation within the substitute's rated parameters. Additionally, the reduced brightness output (25mcd vs. 200mcd) may impact application visibility requirements.

Q: What is the impact of the brightness difference between the two parts?

A: The SSF-LXH475SGC provides 200mcd brightness output, while the WP934SB/4GD provides 25mcd. This represents an 87.5% reduction in brightness. Applications where indicator visibility is critical should evaluate whether the lower output meets functional requirements. In low-light environments or applications requiring high visibility, this difference may be significant.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both components use 3mm T-1 lens size with round domed top configuration. However, the WP934SB/4GD offers right-angle mounting as an alternative to standard through-hole orientation. PCB layout compatibility should be verified if the right-angle configuration is selected.

Q: What is the significance of the diffused, tinted lens on the WP934SB/4GD?

A: The WP934SB/4GD features a diffused, tinted lens compared to the clear lens of the SSF-LXH475SGC. This alters light transmission and optical appearance. The diffused lens scatters light more broadly, while the tinted lens may affect color perception. The wider 40° viewing angle (versus 30°) provides broader visibility range but may reduce peak brightness intensity in the direct viewing direction.

Q: Are both parts RoHS compliant?

A: Yes. Both the SSF-LXH475SGC and WP934SB/4GD are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: What packaging is supplied with the WP934SB/4GD?

A: The WP934SB/4GD is supplied in tube packaging. The original SSF-LXH475SGC packaging specification was not provided in the component data.

Q: Is the WP934SB/4GD currently available for procurement?

A: Yes. The WP934SB/4GD is classified as active product status with 3814 units in stock. The SSF-LXH475SGC is obsolete, making the WP934SB/4GD the recommended active alternative for new procurement.

Q: Can I use the WP934SB/4GD in applications requiring 200mcd brightness?

A: No. The WP934SB/4GD provides only 25mcd brightness output, insufficient for applications requiring the original 200mcd specification. Alternative substitute parts with higher brightness ratings should be evaluated for brightness-critical applications.

Q: What circuit modifications are required for the WP934SB/4GD?

A: Current-limiting resistor values must be recalculated for the 25mA rated current (versus the original 20mA). The calculation method remains identical; only the target current value changes. Verify that the power supply and circuit design can accommodate the increased current consumption.