SSL-LX203CUSBT Equivalent & Substitute Parts

Part Overview

The SSL-LX203CUSBT is a blue LED indication component manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This discrete 3.3V radial LED features a 2mm T-2 ceramic stem package with a clear domed lens and 240mcd brightness rating. The component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and production continuity.

Substiute Parts

SSL-LX203CUSBT

Lumex Opto/Components Inc.In Stock: 781SSL-LX203CUSBT Datasheet

Current PartRFQ

SSL-LX3054USBD

Lumex Opto/Components Inc.In Stock: 5684SSL-LX3054USBD Datasheet

SimilarRFQ

5218053F

DialightIn Stock: 10135218053F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LX203CUSBT is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Blue
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Package / Case: Radial
• Current - Test: 20mA
• Forward Voltage Range: 3.3V to 3.5V (acceptable tolerance for discrete LED indication circuits)
• RoHS3 Compliance: Required
• REACH Unaffected Status: Required

Secondary Considerations:

• Lens Size and physical dimensions may vary based on application space constraints
• Millicandela rating variations are acceptable provided the substitute meets minimum brightness requirements for the intended indication function
• Viewing angle differences accommodate different circuit board layout requirements

The identified substitute parts meet the primary compatibility criteria and maintain regulatory compliance status equivalent to the main part.

Parameter Comparison

Engineering Selection Recommendations

SSL-LX3054USBD (Lumex Opto/Components Inc.)

This substitute maintains identical forward voltage (3.3V) and test current (20mA) specifications to the main part. Both components are manufactured by Lumex Opto/Components Inc., ensuring design continuity. The SSL-LX3054USBD is active in production with 5583 units in stock, providing supply security. The increased millicandela rating (1100mcd versus 240mcd) and reduced viewing angle (35° versus 130°) represent the primary electrical differences. This part is suitable for applications where higher brightness and narrower viewing angle are acceptable or beneficial. RoHS3 and REACH compliance status matches the original specification.

5218053F (Dialight)

This substitute is manufactured by Dialight and operates at 3.5V forward voltage, representing a 0.2V increase from the original specification. The 600mcd brightness rating provides intermediate brightness between the main part and the SSL-LX3054USBD. The 1.80mm lens size is the smallest among the three options, accommodating space-constrained applications. This part is active in production with 921 units in stock. RoHS3 and REACH compliance status matches the original specification. The 0.2V forward voltage difference requires circuit verification to confirm compatibility with existing current-limiting resistor designs.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3054USBD be used as a direct replacement for SSL-LX203CUSBT?

A: SSL-LX3054USBD meets the core electrical requirements (3.3V forward voltage, 20mA test current, blue color, clear lens, through-hole radial package, RoHS3 compliance). Physical dimensions differ: SSL-LX3054USBD is 3mm diameter with 5.25mm maximum height compared to 2mm diameter with 2.50mm maximum height for SSL-LX203CUSBT. Verify printed circuit board layout accommodates the larger package size before implementation.

Q: What is the impact of the 0.2V forward voltage difference with the 5218053F substitute?

A: The 5218053F operates at 3.5V forward voltage versus 3.3V for the original part. This 0.2V difference affects current-limiting resistor calculations. Existing resistor values designed for 3.3V operation will deliver slightly reduced current through the 5218053F. Recalculate resistor values based on the 3.5V specification to maintain intended brightness levels. Verify the power supply voltage margin accommodates the higher forward voltage requirement.

Q: How do brightness differences affect circuit performance?

A: The SSL-LX203CUSBT provides 240mcd brightness. SSL-LX3054USBD delivers 1100mcd, and 5218053F delivers 600mcd. Higher brightness values increase visibility but do not affect electrical circuit operation. Select brightness based on application visibility requirements and ambient lighting conditions. All three parts operate at identical 20mA test current.

Q: Are there viewing angle considerations for substitution?

A: SSL-LX203CUSBT provides 130° viewing angle (wide angle). SSL-LX3054USBD provides 35° viewing angle (narrow angle), and 5218053F provides 30° viewing angle (narrow angle). Narrow-angle substitutes concentrate light intensity in a smaller cone, increasing brightness perception in the primary viewing direction. Verify the application does not require wide-angle visibility before selecting narrow-angle substitutes.

Q: Do all substitute parts meet regulatory compliance requirements?

A: Yes. SSL-LX3054USBD and 5218053F are both RoHS3 compliant and REACH unaffected, matching the original SSL-LX203CUSBT compliance status. Both parts are suitable for applications requiring regulatory compliance documentation.

Q: What is the inventory status of substitute parts?

A: SSL-LX3054USBD has 5583 units in stock. 5218053F has 921 units in stock. Both parts are active in production, providing supply continuity for the obsolete SSL-LX203CUSBT.