Dialight 5555303 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5555303 is a LED Circuit Board Indicator featuring a 4-wide green configuration with a 2.00mm diameter clear lens and domed top design. This through-hole mounted component operates at 5V with a current draw of 4.7mA and delivers 2.5 millicandela at a 40° viewing angle. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications.

Substiute Parts

5555303

DialightIn Stock: 9515555303 Datasheet

Current PartRFQ

5555303F

DialightIn Stock: 10355555303F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Dialight 5555303 is determined by the following critical parameters that must remain consistent:

• Configuration: 4-wide LED arrangement
• Color: Green (x 4) with 565nm peak wavelength
• Voltage Rating: 5V operation
• Current: 4.7mA per specification
• Millicandela Rating: 2.5mcd brightness level
• Viewing Angle: 40° field of view
• Mounting Type: Through-hole connection method

The substitute part 5555303F maintains all critical electrical and functional parameters while introducing a diffused lens type in place of the clear lens. This modification affects light distribution characteristics but preserves the core operational specifications required for circuit board indicator applications.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5555303F serves as the direct substitute for the obsolete 5555303. Both parts maintain identical electrical specifications, configuration, and mounting characteristics. The primary distinction is the lens type: the substitute features a diffused lens compared to the clear lens of the original part.

The 5555303F offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, the substitute achieves ROHS3 compliance, addressing regulatory requirements that the original non-compliant part does not satisfy. Both parts share identical REACH status and ECCN classification.

Selection between these parts should be based on application requirements regarding light distribution. The clear lens of the original part provides focused light output, while the diffused lens of the substitute distributes light more uniformly across a wider area. Electrical performance, brightness output, and operational parameters remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 5555303F directly replace the 5555303 in existing designs?

A: Yes, the 5555303F is electrically and mechanically compatible. Both parts operate at 5V, draw 4.7mA, deliver 2.5mcd brightness, and mount through-hole. The diffused lens of the substitute provides broader light distribution compared to the clear lens of the original.

Q: What is the primary difference between these two parts?

A: The lens type differs. The 5555303 features a clear lens for focused light output, while the 5555303F uses a diffused lens for distributed light output. All electrical parameters, brightness ratings, and mounting specifications remain identical.

Q: Why should I consider the 5555303F over the 5555303?

A: The 5555303 is obsolete, while the 5555303F maintains active product status. The substitute also achieves ROHS3 compliance, supporting modern regulatory requirements.

Q: Are there any compatibility concerns with the diffused lens substitution?

A: Compatibility depends on application-specific light distribution requirements. The diffused lens alters the light pattern but maintains the same brightness output and viewing angle. Evaluate whether the broader light distribution of the diffused lens suits your circuit board indicator application.

Q: Do both parts share the same mounting footprint?

A: Yes, both parts are through-hole mounted with identical configuration and electrical interface. Physical board layout compatibility is maintained.

Q: What certifications apply to each part?

A: The 5555303 is RoHS non-compliant and REACH unaffected. The 5555303F achieves ROHS3 compliance while maintaining REACH unaffected status. Both parts carry EAR99 ECCN classification.