LED Circuit Board Indicator 5503605F Equivalent & Substitute Parts

Part Overview

The Dialight 5503605F is a LED Circuit Board Indicator (CBI) featuring a 5mm T-1 3/4 through-hole right-angle configuration with dual color capability (Green/Yellow). This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations. The part delivers 4.2mcd (Green) and 2.1mcd (Yellow) output with a 65° viewing angle and diffused lens design suitable for panel-mount applications.

Substiute Parts

5503605F

DialightIn Stock: 10875503605F Datasheet

Current PartRFQ

WP59BL/GYW

KingbrightIn Stock: 1625WP59BL/GYW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Kingbright WP59BL/GYW qualifies as a substitute for the Dialight 5503605F based on the following alignment of critical parameters:

Mechanical Compatibility:

• Identical lens size (5mm, T-1 3/4)
• Matching lens style (Round with Domed Top)
• Identical mounting type (Through Hole, Right Angle)
• Dual color configuration (Green/Yellow)

Electrical Compatibility:

• Matching color wavelengths (565nm Green, 590nm Yellow vs. 565nm Green, 583nm Yellow)
• Compatible voltage ratings (2.2V Green / 2.1V Yellow vs. 2.1V)
• Diffused lens type maintained

Regulatory Compliance:

• RoHS3 Compliant (exceeds original RoHS requirement)
• REACH Unaffected (matching status)
• Identical HTSUS classification (8541.41.0000)

Parameter Comparison

Engineering Selection Recommendations

The Kingbright WP59BL/GYW serves as a direct mechanical and electrical substitute for the obsolete Dialight 5503605F. Both components share identical footprints, mounting configurations, and core electrical characteristics necessary for PCB integration.

The substitute part exceeds compliance requirements, offering ROHS3 certification against the original RoHS Compliant specification. Both parts maintain REACH Unaffected status and identical moisture sensitivity ratings (MSL 1).

Key design considerations for substitution:

Current ratings on the Kingbright part (25mA Green, 30mA Yellow) exceed the original specification (10mA). Circuit designs must accommodate these higher current requirements through appropriate series resistor sizing or current-limiting driver configurations.

Brightness output increases substantially (100mcd Green vs. 4.2mcd; 40mcd Yellow vs. 2.1mcd). Applications sensitive to luminous intensity must evaluate whether the increased output affects visual perception or creates unintended contrast in multi-indicator arrays.

Viewing angle narrows from 65° to 30°. Applications requiring wide-angle visibility must assess whether the reduced viewing angle impacts operational requirements.

Frequently Asked Questions (FAQ)

Q: Can the Kingbright WP59BL/GYW be used as a direct replacement without PCB modifications?

A: Mechanical and mounting compatibility is direct. However, electrical circuit design must be evaluated. The substitute part's higher current ratings (25mA/30mA vs. 10mA) require verification that existing current-limiting resistors or driver circuits can accommodate the increased current draw.

Q: What is the impact of the 30° viewing angle versus the original 65°?

A: The narrower viewing angle concentrates light output within a tighter cone. Applications where indicators must be visible from wide angles or oblique viewing positions should evaluate whether this characteristic affects system usability.

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

A: The Kingbright substitute meets ROHS3 Compliant status, which exceeds the original RoHS Compliant requirement. Both parts maintain identical REACH Unaffected and MSL 1 ratings. No regulatory barriers exist for substitution.

Q: How do the brightness differences affect circuit design?

A: The Kingbright part delivers significantly higher luminous intensity (100mcd Green, 40mcd Yellow vs. 4.2mcd and 2.1mcd). Existing series resistor values may need adjustment to prevent over-driving the LED or to maintain consistent brightness perception in multi-indicator designs.

Q: Is the wavelength difference (583nm vs. 590nm Yellow) significant?

A: The 7nm difference in yellow wavelength falls within acceptable tolerance for visual perception and is not considered a functional incompatibility. Both wavelengths produce yellow light suitable for standard indicator applications.

Q: What packaging format is available for the Kingbright substitute?

A: The WP59BL/GYW is supplied in Bulk packaging, compared to the original part's standard packaging. Procurement quantities and handling procedures should reflect this packaging format.