LED Circuit Board Indicator 5554004 Equivalent & Substitute Parts

Part Overview

The Dialight 5554004 is a LED Circuit Board Indicator (CBI) featuring a 4-wide red LED configuration rated for 5V operation. This component is designed for through-hole, right-angle mounting applications requiring visual status indication on circuit boards. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

5554004

DialightIn Stock: 9405554004 Datasheet

Current PartRFQ

AM2520EF/4ID5V

KingbrightIn Stock: 891AM2520EF/4ID5V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Dialight 5554004 are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Configuration: 4-wide LED array
• Color: Red (x 4)
• Voltage Rating: 5V
• Mounting Type: Through Hole
• Lens Style: Round with Domed Top
• Viewing Angle: 40°

Secondary Considerations:

• Current rating within acceptable operating range (17-18mA)
• Wavelength in red spectrum (627-650nm acceptable)
• Lens diameter (1.80-2.00mm acceptable with mechanical verification)
• RoHS compliance status for new designs

The Kingbright AM2520EF/4ID5V qualifies as a substitute based on matching configuration, voltage rating, color, mounting type, and optical characteristics. Differences in lens diameter (1.80mm vs 2.00mm) and current rating (18mA vs 17mA) are within acceptable tolerances for circuit board indicator applications.

Parameter Comparison

Engineering Selection Recommendations

The Kingbright AM2520EF/4ID5V is an active production substitute for the obsolete Dialight 5554004. Selection of this alternative is supported by:

Product Status: The substitute part is in active production, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance: The Kingbright part is ROHS3 compliant, meeting current regulatory requirements for new designs and manufacturing. The original Dialight part is RoHS non-compliant, which may restrict its use in new applications subject to RoHS directives.

Functional Equivalence: Both parts share identical voltage rating (5V), configuration (4-wide), color (red), viewing angle (40°), and lens style (round with domed top). Current ratings differ by 1mA (17mA vs 18mA), which is operationally insignificant in typical circuit board indicator applications.

Optical Characteristics: The substitute provides higher brightness (8mcd vs 5.2mcd) with a slightly shorter wavelength (627nm vs 650nm), both within acceptable parameters for red LED indicators. The diffused, tinted lens type of the substitute may produce slightly different visual appearance compared to the original part.

Mechanical Considerations: Lens diameter differs by 0.20mm (1.80mm vs 2.00mm). Mechanical fit verification in the target PCB layout is required before final design release.

Frequently Asked Questions (FAQ)

Q: Can the Kingbright AM2520EF/4ID5V be used as a direct replacement for the Dialight 5554004?

A: The Kingbright part is functionally equivalent based on voltage rating, configuration, color, and optical viewing angle. Mechanical verification of the 0.20mm lens diameter difference in the PCB layout is required. The substitute is recommended for new designs due to active production status and RoHS3 compliance.

Q: What are the key differences between these two parts?

A: Primary differences are product status (obsolete vs active), RoHS compliance (non-compliant vs ROHS3 compliant), lens diameter (2.00mm vs 1.80mm), current rating (17mA vs 18mA), brightness (5.2mcd vs 8mcd), and lens type (standard vs diffused/tinted). All other critical parameters match.

Q: Does the higher brightness of the substitute part affect circuit design?

A: The substitute's higher brightness (8mcd vs 5.2mcd) does not require circuit modifications. The current rating difference (1mA) is negligible in typical indicator applications. Existing current-limiting resistor values remain valid.

Q: Are there mounting differences between these parts?

A: Both parts use through-hole mounting. The original specifies right-angle mounting, while the substitute specifies through-hole without explicit right-angle designation. PCB layout compatibility must be verified based on specific mounting requirements.

Q: What is the impact of the wavelength difference (650nm vs 627nm)?

A: Both wavelengths are within the red spectrum. The 23nm difference is visually imperceptible in typical circuit board indicator applications. The substitute's diffused, tinted lens may produce a slightly different visual appearance.

Q: Is the Kingbright part suitable for designs requiring RoHS compliance?

A: Yes. The Kingbright AM2520EF/4ID5V is ROHS3 compliant, making it suitable for applications and markets requiring RoHS certification. The original Dialight part is RoHS non-compliant.