Dialight 5219918 LED Blue Clear 3MM T/H - Equivalent & Substitute Parts

Part Overview

The Dialight 5219918 is a blue 470nm LED indication component designed for through-hole mounting in 3mm form factor applications. This part operates at 4.6V forward voltage with a 20mA test current and delivers 460mcd luminous intensity. The main part number 5219918 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Active alternatives are available from both Dialight and third-party manufacturers that maintain electrical and mechanical compatibility within specified parameters.

Substiute Parts

5219918

DialightIn Stock: 11685219918 Datasheet

Current PartRFQ

5219918F

DialightIn Stock: 21185219918F Datasheet

DirectRFQ

5219918801F

DialightIn Stock: 11475219918801F Datasheet

Parametric EquivalentRFQ

SSL-LX3044USBC

Lumex Opto/Components Inc.In Stock: 10667SSL-LX3044USBC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Dialight 5219918 are classified into two categories based on substitution type:

Direct Manufacturer Equivalent (5219918F): This part maintains identical electrical specifications including forward voltage (4.6V), test current (20mA), wavelength characteristics (470nm dominant, 464nm peak), millicandela rating (460mcd), viewing angle (50°), and mechanical form factor (3mm radial through-hole). The primary difference is packaging format (bulk versus original packaging) and product status (active versus obsolete). This part is a direct functional replacement with no circuit redesign required.

Parametric Equivalent (5219918801F): This Dialight part also maintains identical electrical and mechanical parameters as the main part number, including all wavelength, voltage, current, and luminous intensity specifications. Like 5219918F, it differs in packaging and product status while providing complete electrical compatibility.

Similar Manufacturer Alternative (SSL-LX3044USBC): This Lumex Opto/Components Inc. part shares the same blue color, 4.6V forward voltage, 20mA test current, and through-hole radial mounting. However, it differs in the following parameters: millicandela rating (1000mcd versus 460mcd), viewing angle (30° versus 50°), lens size designation (3mm T-1 versus 2.92mm), and maximum height (4.60mm versus 6.35mm). This part is suitable only when higher luminous intensity and narrower viewing angle are acceptable for the application.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification): Select either Dialight 5219918F or 5219918801F. Both parts are active products with identical electrical and mechanical specifications to the obsolete 5219918. Both achieve ROHS3 compliance, addressing regulatory requirements that the original part does not meet. Inventory availability is sufficient for both options (2108 pcs and 1096 pcs respectively). These parts require no circuit redesign and can be substituted on a one-to-one basis.

For Applications Tolerating Parameter Variation: The Lumex Opto/Components Inc. SSL-LX3044USBC is suitable only when the application can accommodate higher luminous intensity (1000mcd versus 460mcd) and a narrower viewing angle (30° versus 50°). The reduced maximum height (4.60mm versus 6.35mm) may provide mechanical advantages in space-constrained designs. This part is ROHS3 compliant and maintains the same forward voltage and test current. Selection of this part requires verification that the increased brightness and reduced viewing angle do not negatively impact the intended application.

Frequently Asked Questions (FAQ)

Q: Can 5219918F and 5219918801F be used interchangeably with the obsolete 5219918?

A: Yes. Both parts maintain identical electrical specifications (4.6V forward voltage, 20mA test current, 470nm dominant wavelength, 460mcd luminous intensity, 50° viewing angle) and mechanical form factor (3mm radial through-hole, 6.35mm maximum height). No circuit modification is required. The primary differences are packaging format and product status (both are active).

Q: What are the key differences between the Dialight and Lumex alternatives?

A: The Lumex SSL-LX3044USBC differs in three critical parameters: luminous intensity (1000mcd versus 460mcd), viewing angle (30° versus 50°), and maximum height (4.60mm versus 6.35mm). Forward voltage and test current remain identical at 4.6V and 20mA. Selection depends on whether the application requires the higher brightness and narrower beam angle of the Lumex part.

Q: Are all substitute parts RoHS compliant?

A: The Dialight 5219918F and 5219918801F are ROHS3 compliant. The Lumex SSL-LX3044USBC is also ROHS3 compliant. The original 5219918 is RoHS non-compliant. If RoHS compliance is a regulatory requirement, use only the active substitute parts.

Q: What is the difference between direct equivalent and parametric equivalent?

A: Both 5219918F and 5219918801F are functionally equivalent to the main part. The distinction reflects different classification methodologies in component databases. From an engineering perspective, both parts are suitable direct replacements with identical electrical and mechanical parameters.

Q: Can the SSL-LX3044USBC be used in applications designed for the 5219918?

A: The SSL-LX3044USBC can be used only if the application tolerates higher luminous intensity (1000mcd versus 460mcd) and a narrower viewing angle (30° versus 50°). The reduced maximum height may also affect mechanical fit. Verify that these parameter differences do not compromise the intended function before substitution.

Q: What is the moisture sensitivity level for these parts?

A: All parts listed (5219918, 5219918F, 5219918801F, and SSL-LX3044USBC) have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no special moisture handling or storage requirements.