Dialight 5581201801F LED Panel Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5581201801F is an LED snap-in panel indicator featuring a yellow diffused lens with 60° viewing angle. This T-1 3mm LED is designed for panel-mount applications requiring low-voltage operation at 1.8V and 7mA maximum current. The component is Active status and ROHS3 compliant, making it suitable for current production environments. Equivalent parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

5581201801F

DialightIn Stock: 10905581201801F Datasheet

Current PartRFQ

5581201001F

DialightIn Stock: 13005581201001F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5581201801F is determined by strict parametric matching across all critical electrical and mechanical specifications. The following parameters must align identically for a part to function as a direct equivalent:

Electrical Parameters: Voltage (1.8V), Current (7mA), Wavelength (585nm), and Millicandela Rating (1.4mcd) must be identical.

Mechanical Parameters: Lens size (3mm T-1), lens style (round with domed top), panel cutout shape (round), and panel cutout dimensions (0.16" / 4.06mm) must match exactly.

Optical Parameters: Lamp color (yellow), lens color (yellow), lens transparency (diffused), and viewing angle (60°) must be identical.

Compliance Parameters: RoHS status, REACH status, and MSL rating must be equivalent or superior.

The substitute part 5581201001F meets all these criteria and is classified as a parametric equivalent within the Dialight 558 series.

Parameter Comparison

Engineering Selection Recommendations

Both the Dialight 5581201801F and 5581201001F are Active status components with identical electrical, mechanical, and optical specifications. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current production applications. Selection between these parts may be based on inventory availability, lead time, or procurement source, as all functional and compliance parameters are equivalent. The MSL rating of 1 (Unlimited) indicates both parts have minimal moisture sensitivity and require standard handling practices.

Frequently Asked Questions (FAQ)

Q: Can 5581201001F be used as a direct replacement for 5581201801F?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (1.8V, 7mA), optical properties (yellow diffused lens, 60° viewing angle, 585nm wavelength), mechanical dimensions (3mm T-1 round lens, 0.16" panel cutout), and compliance certifications (ROHS3, REACH unaffected).

Q: Are there any differences in panel mounting between these parts?

A: No. Both parts feature identical panel cutout specifications: round shape with 0.16" (4.06mm) diameter. Physical installation is interchangeable.

Q: Do both parts have the same brightness rating?

A: Yes. Both parts are rated at 1.4 millicandela (mcd), providing identical luminous intensity.

Q: What is the significance of the MSL rating for these components?

A: Both parts carry MSL 1 (Unlimited), indicating they have no moisture sensitivity limitations and do not require special dry-pack storage or handling procedures.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status, making them suitable for equivalent use in regulated applications.