SSL-LX203CSIT Equivalent & Substitute Parts

Part Overview

The SSL-LX203CSIT is a red LED indication component manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This part features a 2mm T-2 ceramic stem package with a clear lens and 12mcd brightness rating. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain compatibility with the original electrical specifications and through-hole mounting requirements while accommodating available inventory from active product lines.

Substiute Parts

SSL-LX203CSIT

Lumex Opto/Components Inc.In Stock: 907SSL-LX203CSIT Datasheet

Current PartRFQ

WP4060ID

KingbrightIn Stock: 3010WP4060ID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SSL-LX203CSIT are identified based on the following critical parameters:

Mandatory Matching Criteria:

• Color: Red
• Mounting Type: Through Hole
• Package Type: Radial lead configuration
• RoHS Compliance: ROHS3 Compliant
• Voltage - Forward (Vf): Within acceptable operating range (1.9V to 2.2V)
• Current - Test: 20mA standard specification

Allowable Variation Parameters:

• Millicandela Rating: Brightness may vary within application tolerance
• Viewing Angle: May differ based on lens design
• Lens Transparency: Clear or diffused acceptable depending on application requirements
• Wavelength - Peak: Red spectrum range (610nm to 640nm acceptable)
• Physical dimensions: Minor variations acceptable if through-hole compatibility maintained

The WP4060ID from Kingbright qualifies as a substitute based on matching color, through-hole mounting, radial package configuration, RoHS3 compliance, and compatible forward voltage specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Product Status: The SSL-LX203CSIT is classified as obsolete. The WP4060ID is an active product from an established manufacturer, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: The forward voltage difference of 0.1V (2.1V vs 2.0V) is within standard circuit design tolerance and does not require modification to series resistor calculations for typical 20mA operation. Both parts operate at identical test current specifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Performance Differences: The WP4060ID exhibits lower brightness (8mcd vs 12mcd) and narrower viewing angle (70° vs 160°). These differences must be evaluated against specific application requirements. Applications requiring wide-angle visibility or high brightness may require circuit-level compensation or alternative solutions.

Optical Characteristics: The wavelength difference (627nm vs 636nm) results in a slightly different red hue. The WP4060ID features a diffused lens compared to the clear lens of the SSL-LX203CSIT, affecting light distribution and appearance.

Packaging and Assembly: Both parts use radial lead through-hole configuration compatible with standard PCB assembly processes. Physical dimension variations are minor and do not impact standard mounting practices.

Frequently Asked Questions (FAQ)

Q: Can the WP4060ID directly replace the SSL-LX203CSIT without circuit modifications?

A: The WP4060ID is electrically compatible for direct substitution in most applications. The 0.1V forward voltage difference does not require resistor recalculation for standard 20mA operation. However, applications with strict brightness or viewing angle requirements must evaluate the performance differences before implementation.

Q: What is the impact of the 4mcd brightness difference?

A: The WP4060ID provides 8mcd compared to the SSL-LX203CSIT's 12mcd, representing a 33% reduction in brightness. For applications where visibility is critical or where the LED operates in high ambient light conditions, this difference may be significant. Application-specific testing is necessary to determine acceptability.

Q: Why does the WP4060ID have a narrower viewing angle?

A: The viewing angle difference (70° vs 160°) results from different lens design and optical characteristics. The WP4060ID's narrower angle concentrates light output, which may be advantageous for directed indication but limits visibility from off-axis positions. Application layout and viewing requirements determine acceptability.

Q: Are there differences in lens appearance between these parts?

A: Yes. The SSL-LX203CSIT features a clear lens, while the WP4060ID has a diffused lens. This affects light distribution and the visual appearance of the illuminated LED. The diffused lens provides more uniform light distribution but may appear less bright due to light scattering.

Q: Is the WP4060ID suitable for all applications using the SSL-LX203CSIT?

A: The WP4060ID is suitable for applications where the lower brightness and narrower viewing angle are acceptable. Applications with specific visibility, brightness, or optical distribution requirements must be individually evaluated. Both parts maintain identical electrical operating specifications and regulatory compliance.

Q: What is the lead configuration difference between these parts?

A: Both parts use radial lead through-hole configuration. Physical dimensions differ slightly, but both are compatible with standard through-hole PCB assembly processes. Lead spacing and mounting hole requirements should be verified against specific PCB designs.

Q: Are there supply chain advantages to using the WP4060ID?

A: Yes. The WP4060ID is an active product with higher current inventory (2923 pcs vs 888 pcs). As an active product line, long-term availability and consistent supply are assured, whereas the SSL-LX203CSIT is obsolete with limited remaining stock.