SSL-LX25783USBD Equivalent & Substitute Parts

Part Overview

The SSL-LX25783USBD is a blue diffused through-hole LED manufactured by Lumex Opto/Components Inc., designed for discrete indication applications. This component operates at a forward voltage of 3.5V with a test current of 20mA and delivers 50 millicandela of luminous intensity. The part features a rectangular lens (7.00mm x 2.30mm) with diffused transparency and a 110° viewing angle.

The SSL-LX25783USBD is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

SSL-LX25783USBD

Lumex Opto/Components Inc.In Stock: 784SSL-LX25783USBD Datasheet

Current PartRFQ

EALP02TRABA0

Everlight Electronics Co LtdIn Stock: 792EALP02TRABA0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LX25783USBD is determined by the following critical parameters:

Color and Wavelength Compatibility: The substitute part must emit blue light at a peak wavelength of 470nm to maintain optical consistency in indication applications.

Electrical Characteristics: Forward voltage (Vf) and test current must be compatible with existing circuit designs. The SSL-LX25783USBD operates at 3.5V with 20mA test current; substitute parts operating at 3.3V with the same 20mA test current are acceptable within standard circuit tolerance ranges.

Optical Performance: Lens transparency (diffused) and viewing angle (110°) define the light distribution characteristics. Substitutes must maintain diffused lens properties for consistent visual indication.

Mechanical Compatibility: Through-hole radial mounting is required. Physical dimensions and height must accommodate existing PCB layouts and mechanical assemblies.

Regulatory Compliance: Both parts must maintain ROHS3 compliance and MSL 1 rating to satisfy environmental and reliability requirements.

Luminous Intensity: The 50mcd rating of the SSL-LX25783USBD establishes the baseline brightness requirement. Substitute parts with equal or higher millicandela ratings (such as 80mcd) provide equivalent or improved optical performance.

Parameter Comparison

Engineering Selection Recommendations

The EALP02TRABA0 (Everlight Electronics Co Ltd) qualifies as a functional substitute for the obsolete SSL-LX25783USBD based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, satisfying environmental and reliability standards.

Electrical Compatibility: The forward voltage difference of 0.2V (3.5V vs. 3.3V) falls within standard circuit design tolerances. Both components operate at identical 20mA test current, ensuring compatibility with existing current-limiting resistor calculations.

Optical Equivalence: Peak wavelength values of 470nm and 468nm are visually indistinguishable in blue indication applications. The EALP02TRABA0 delivers 80mcd compared to the SSL-LX25783USBD's 50mcd, providing 60% higher luminous intensity while maintaining diffused lens transparency.

Mechanical Fit: Both components use through-hole radial mounting with compatible package configurations. The EALP02TRABA0 height of 8.30mm versus the SSL-LX25783USBD height of 9.25mm represents a 0.95mm reduction, which accommodates standard PCB clearance requirements.

Production Status: The EALP02TRABA0 is in active production with confirmed inventory availability (747 pieces), ensuring long-term supply chain reliability compared to the obsolete SSL-LX25783USBD.

Design Consideration: The EALP02TRABA0 features a 100° viewing angle compared to the SSL-LX25783USBD's 110°, representing a 10° reduction in horizontal light distribution. This difference is acceptable for standard indication applications but should be verified if the original design depends on the wider 110° viewing angle for specific optical coverage requirements.

Frequently Asked Questions (FAQ)

Q: Can the EALP02TRABA0 directly replace the SSL-LX25783USBD in existing circuit designs?

A: Yes. Both components operate at compatible forward voltages (3.5V vs. 3.3V) and identical test current (20mA). The 0.2V difference is within standard circuit tolerance ranges and does not require resistor recalculation. Through-hole radial mounting is identical, and both maintain ROHS3 compliance.

Q: What is the significance of the 30mcd brightness difference between these parts?

A: The EALP02TRABA0 delivers 80mcd versus the SSL-LX25783USBD's 50mcd. This 60% increase in luminous intensity provides brighter indication without requiring circuit modifications. For applications where the original 50mcd brightness is specified as a maximum limit, the higher brightness of the substitute should be evaluated against design constraints.

Q: How does the 10° viewing angle reduction affect application performance?

A: The EALP02TRABA0 provides a 100° viewing angle compared to the SSL-LX25783USBD's 110°. This 10° reduction narrows the horizontal light distribution cone. For standard indication applications where the LED is viewed from directly ahead or within ±50°, this difference is negligible. Applications requiring wide-angle visibility from extreme side angles should verify that 100° viewing angle meets optical coverage requirements.

Q: Are the lens dimensions compatible between these parts?

A: No. The SSL-LX25783USBD features a rectangular lens (7.00mm x 2.30mm), while the EALP02TRABA0 features a 2.00mm diameter round lens. Both use through-hole radial mounting, but the different lens geometries may affect mechanical fit in lens apertures or light guides. Verify that the round 2.00mm lens accommodates existing mechanical assemblies designed for the rectangular 7.00mm x 2.30mm lens.

Q: What is the wavelength difference between 470nm and 468nm?

A: The 2nm difference is imperceptible to human vision. Both components emit blue light within the same spectral range and are visually equivalent for indication applications. This difference does not affect color matching or optical performance in practical applications.

Q: Are both parts available for immediate procurement?

A: Yes. The SSL-LX25783USBD has 731 pieces in stock (obsolete status), and the EALP02TRABA0 has 747 pieces in stock (active production status). The EALP02TRABA0 offers superior long-term supply chain reliability due to its active production status.

Q: What compliance certifications apply to both components?

A: Both the SSL-LX25783USBD and EALP02TRABA0 are ROHS3 compliant and REACH unaffected. Both carry MSL 1 (Unlimited) moisture sensitivity ratings and EAR99 export classification. Compliance requirements are identical between the two components.