Dialight 5505307 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5505307 is a 5mm yellow LED circuit board indicator designed for through-hole, right-angle mounting applications. This component features a diffused lens with domed top, rated for 20mA operation at 2.2V, and delivers 34 millicandela at a 50° viewing angle. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing production support and design continuity.

Substiute Parts

5505307

DialightIn Stock: 8885505307 Datasheet

Current PartRFQ

H178CSYD

Bivar Inc.In Stock: 1093H178CSYD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bivar Inc. H178CSYD qualifies as a functional substitute for the Dialight 5505307 based on the following critical parameters:

Matching Parameters:

• Color: Yellow
• Configuration: Single
• Current Rating: 20mA
• Lens Type: Diffused
• Lens Style: Round with Domed Top
• Mounting Type: Through Hole, Right Angle
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

• Voltage Rating: 2.2V (main part) vs. 2V (substitute) — within acceptable tolerance for LED forward voltage specifications
• Wavelength - Peak: 585nm (main part) vs. 590nm (substitute) — both within yellow spectrum range
• Viewing Angle: 50° (main part) vs. 45° (substitute) — minor difference in light distribution
• Millicandela Rating: 34mcd (main part) vs. 300mcd (substitute) — substitute provides higher brightness
• Lens Size: 5.00mm Dia (main part) vs. 5mm, T-1 3/4 (substitute) — equivalent mechanical form factor

Parameter Comparison

Engineering Selection Recommendations

The Bivar H178CSYD is an active production component suitable for replacing the obsolete Dialight 5505307. The substitute maintains electrical compatibility through matching current and near-equivalent forward voltage specifications. The H178CSYD provides enhanced brightness (300mcd vs. 34mcd) and carries ROHS3 compliance certification, supporting modern manufacturing and environmental standards.

Selection of the H178CSYD eliminates obsolescence risk while maintaining mechanical and electrical compatibility with existing through-hole, right-angle PCB mounting designs. The higher millicandela rating provides improved visibility margin in circuit board indicator applications.

Frequently Asked Questions (FAQ)

Q: Can the Bivar H178CSYD directly replace the Dialight 5505307 in existing designs?

A: Yes. Both components share identical mounting type (through-hole, right-angle), lens configuration (diffused, round with domed top), and current rating (20mA). Forward voltage differs by 0.2V (2.2V vs. 2V), which is within standard LED tolerance ranges and does not affect circuit compatibility when properly current-limited.

Q: What is the significance of the higher millicandela rating in the substitute?

A: The H178CSYD delivers 300mcd compared to the original 34mcd. This increased brightness is a performance enhancement that improves indicator visibility without affecting electrical or mechanical compatibility. Applications requiring the original brightness level can implement optical attenuation if necessary.

Q: Are there packaging differences between these components?

A: The Dialight 5505307 packaging is not specified in available data. The Bivar H178CSYD is supplied in tray packaging. Both components use identical through-hole, right-angle mounting and 5mm form factors, ensuring PCB compatibility regardless of packaging format.

Q: Does the substitute meet current compliance requirements?

A: The Bivar H178CSYD carries ROHS3 certification. The original Dialight part's RoHS status is not specified. Both components have MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints for storage or handling.

Q: What is the viewing angle difference between these parts?

A: The original part specifies 50° viewing angle; the substitute specifies 45°. This 5° difference represents a minor variation in light distribution characteristics. Both angles are typical for diffused 5mm LED indicators and do not affect standard circuit board indicator applications.