Dialight 5581601003 LED Panel Indicator Yellow - Equivalent & Substitute Parts

Part Overview

The Dialight 5581601003 is a snap-in LED panel indicator featuring a yellow lens with clear transparency, designed for 2.1V operation at 20mA maximum current. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing production and maintenance applications. The part belongs to the Dialight 558 series and utilizes a 3mm T-1 round domed lens configuration with wire leads measuring 6 inches (152.40mm) in length.

Key Parameters

Parameter	Value
Manufacturer	Dialight
Series	558
Lamp Color	Yellow
Lens Color	Yellow
Lens Transparency	Clear
Voltage (Vf Typ)	2.1V
Current (If Max)	20mA
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Panel Cutout Shape	Round
Panel Cutout Dimensions	0.16" (4.06mm)
Millicandela Rating	70mcd
Wavelength - Peak	585nm
Viewing Angle	45°
Termination Style	Wire Leads - 6" (152.40mm)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5581601003 is determined by strict equivalence across the following critical parameters: lamp color (yellow), lens color (yellow), lens transparency (clear), electrical ratings (2.1V forward voltage, 20mA maximum current), optical characteristics (70mcd brightness, 585nm peak wavelength, 45° viewing angle), mechanical form factor (3mm T-1 round domed lens), panel cutout specifications (0.16" round), and termination configuration (6-inch wire leads).

The identified substitute parts maintain complete parametric alignment with the original component across all specified electrical, optical, and mechanical dimensions. Substitution is based solely on these matching parameters and does not introduce additional technical criteria.

Parameter Comparison

Parameter	5581601003 (Original)	5581601003F (Direct Substitute)	5581601023F (Parametric Equivalent)
Manufacturer	Dialight	Dialight	Dialight
Series	558	558	558
Product Status	Obsolete	Active	Active
Lamp Color	Yellow	Yellow	Yellow
Lens Color	Yellow	Yellow	Yellow
Lens Transparency	Clear	Clear	Clear
Voltage (Vf Typ)	2.1V	2.1V	2.1V
Current (If Max)	20mA	20mA	20mA
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top
Panel Cutout Shape	Round	Round	Round
Panel Cutout Dimensions	0.16" (4.06mm)	0.16" (4.06mm)	0.16" (4.06mm)
Millicandela Rating	70mcd	70mcd	70mcd
Wavelength - Peak	585nm	585nm	585nm
Viewing Angle	45°	45°	45°
Termination Style	Wire Leads - 6" (152.40mm)	Wire Leads - 6" (152.40mm)	Wire Leads - 6" (152.40mm)
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts (5581601003F and 5581601023F) are active products manufactured by Dialight and maintain complete electrical and mechanical equivalence to the obsolete 5581601003. The primary distinction between alternatives is regulatory compliance status.

The 5581601003F represents a direct substitute with active product status and ROHS3 compliance certification. The 5581601023F provides parametric equivalence with identical electrical and optical specifications, active product status, and ROHS3 compliance, with the additional designation of PVC-free construction.

Selection between these alternatives should be based on supply chain availability, packaging requirements (both offered in bulk), and any specific material composition requirements for the end application. Both parts satisfy the complete parametric requirements of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 5581601003F and 5581601023F be used interchangeably with the original 5581601003?

A: Yes. Both substitute parts maintain identical electrical ratings (2.1V, 20mA), optical characteristics (70mcd, 585nm, 45° viewing angle), and mechanical specifications (3mm T-1 round domed lens, 0.16" round panel cutout, 6-inch wire leads). Substitution is direct without circuit modification.

Q: What is the difference between the two substitute parts?

A: The 5581601003F and 5581601023F are parametrically equivalent across all electrical, optical, and mechanical parameters. The 5581601023F includes PVC-free material designation. Both are ROHS3 compliant and available in bulk packaging.

Q: Why is the original 5581601003 listed as obsolete?

A: The original part is classified as obsolete by the manufacturer. The active substitute parts (5581601003F and 5581601023F) provide continued availability of the same functional specification within the Dialight 558 series.

Q: Are there any compliance differences between the original and substitute parts?

A: The original 5581601003 is RoHS non-compliant. Both substitute parts (5581601003F and 5581601023F) are ROHS3 compliant. All three parts are REACH Unaffected and classified under ECCN EAR99.

Q: What packaging options are available for the substitute parts?

A: Both substitute parts are available in bulk packaging. The original part was supplied with standard packaging designation.

Q: Are the wire lead lengths identical across all three parts?

A: Yes. All three parts feature wire leads measuring 6 inches (152.40mm) in length.

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