Dialight 5581201801 LED Panel Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5581201801 is a yellow LED panel snap-in indicator designed for 0.16" (4.06mm) round panel cutouts. This component features a diffused lens with 60° viewing angle, operating at 1.8V and 7mA maximum current. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The active substitute maintains identical electrical and mechanical specifications while offering improved compliance status.

Substiute Parts

5581201801

DialightIn Stock: 8115581201801 Datasheet

Current PartRFQ

5581201801F

DialightIn Stock: 10905581201801F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5581201801 is determined by strict equivalence across the following critical parameters:

• Electrical specifications: 1.8V forward voltage and 7mA maximum current
• Optical characteristics: Yellow lamp color, 585nm peak wavelength, 1.4mcd brightness, 60° viewing angle
• Mechanical compatibility: 3mm T-1 lens size, round domed top lens style, diffused lens transparency
• Panel interface: Round cutout shape with 0.16" (4.06mm) dimensions

The substitute part 5581201801F meets all these criteria while differing only in termination style documentation and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5581201801F is the direct substitute for the obsolete 5581201801. Both components share identical electrical ratings, optical performance, and mechanical dimensions. The primary distinction is product status: the 5581201801 is obsolete while the 5581201801F is active in production.

For new designs and ongoing production, the 5581201801F is the appropriate selection. This part maintains full compatibility with existing panel cutout specifications and circuit designs while offering ROHS3 compliance, addressing regulatory requirements that the original part does not meet.

Frequently Asked Questions (FAQ)

Q: Can the 5581201801F directly replace the 5581201801 in existing assemblies?

A: Yes. Both parts are electrically and mechanically identical. The 5581201801F operates at the same 1.8V forward voltage and 7mA maximum current, fits the same 0.16" (4.06mm) round panel cutout, and produces identical optical output at 1.4mcd and 585nm wavelength.

Q: What is the difference between these two part numbers?

A: The 5581201801F is the active production variant of the obsolete 5581201801. Electrical and optical specifications are identical. The substitute offers ROHS3 compliance, whereas the original is RoHS non-compliant.

Q: Are there packaging differences between these parts?

A: The 5581201801 is specified with "-" packaging notation, while the 5581201801F is supplied in Bulk packaging. This reflects the production status difference but does not affect component functionality or panel mounting compatibility.

Q: What panel cutout dimensions are required for installation?

A: Both parts require a 0.16" (4.06mm) round panel cutout. The domed top lens style and diffused transparency are consistent across both part numbers.

Q: Are compliance certifications identical?

A: Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99). The 5581201801F provides ROHS3 compliance, which the original 5581201801 does not meet.