Dialight 5510403F LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5510403F is an active production LED Circuit Board Indicator featuring a single red diffused lens in 3mm T-1 form factor with right-angle through-hole mounting. This component operates at 2V with 10mA current consumption and delivers 10 millicandela output at 650nm peak wavelength. The part is ROHS3 compliant with unlimited moisture sensitivity rating, making it suitable for standard industrial and commercial circuit board applications.

Substitute parts are necessary when addressing inventory constraints, lead time requirements, or when design specifications allow for alternative optical or electrical characteristics within the same functional category.

Substiute Parts

5510403F

DialightIn Stock: 10415510403F Datasheet

Current PartRFQ

5510404F

DialightIn Stock: 19365510404F Datasheet

DirectRFQ

5510407010F

DialightIn Stock: 21715510407010F Datasheet

DirectRFQ

5510407F

DialightIn Stock: 36605510407F Datasheet

DirectRFQ

5510409F

DialightIn Stock: 33085510409F Datasheet

DirectRFQ

WP934RS/ID

KingbrightIn Stock: 1681WP934RS/ID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5510403F is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Lens size (3mm, T-1)
• Mounting type (Through Hole, Right Angle)
• Voltage rating (2V)
• Color (Red)
• Lens style (Round with Domed Top)
• Lens type (Diffused, Tinted)
• Configuration (Single)

Allowable Variation Parameters:

• Current rating (10mA baseline; higher ratings acceptable if circuit design permits)
• Millicandela rating (10mcd baseline; variations acceptable based on application brightness requirements)
• Viewing angle (45° baseline; variations acceptable if application field-of-view requirements are met)
• Wavelength peak (650nm baseline; minor variations within red spectrum acceptable)
• Manufacturer (cross-manufacturer substitution permitted when all other parameters align)

The substitute parts listed below maintain compatibility across all mandatory parameters while offering variations in optical output characteristics.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full ROHS3 compliance with unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the primary 5510403F component.

Dialight Series 551 Substitutes (5510404F, 5510407010F, 5510407F, 5510409F): These parts share identical electrical and mechanical specifications with the 5510403F across voltage, current, lens configuration, and mounting characteristics. Selection among these Dialight variants depends on inventory availability and viewing angle requirements where specified.

Cross-Manufacturer Substitute (WP934RS/ID - Kingbright): The Kingbright WP934RS/ID operates at 30mA with 30mcd output, representing a higher-brightness alternative. This part maintains compatibility across physical form factor, mounting type, voltage rating, and lens characteristics. The 627nm wavelength represents a minor shift within the red spectrum. Selection of this substitute requires confirmation that the circuit design accommodates the increased current draw and that the higher brightness output aligns with application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5510403F be directly replaced with any of the listed substitutes?

A: Direct replacement is possible only when the circuit design accommodates the electrical and optical characteristics of the substitute part. All Dialight Series 551 variants (5510404F, 5510407010F, 5510407F, 5510409F) share identical 10mA current and 10mcd output ratings with the 5510403F. The Kingbright WP934RS/ID requires circuit verification due to its 30mA current rating and 30mcd output.

Q: What is the significance of the viewing angle specification?

A: Viewing angle determines the cone of light distribution from the LED. The 5510403F specifies 45°. The Kingbright WP934RS/ID specifies 40°, representing a slightly narrower distribution. Application requirements for indicator visibility across different viewing positions must be evaluated before substitution.

Q: Are there differences in wavelength between the main part and substitutes?

A: The 5510403F and all Dialight substitutes operate at 650nm peak wavelength. The Kingbright WP934RS/ID operates at 627nm, a minor variation within the red spectrum. Both wavelengths are suitable for standard red indicator applications.

Q: What does the viewing angle specification of "Not Specified" for 5510404F indicate?

A: The 5510404F does not provide a documented viewing angle value in the available specifications. When this part is selected as a substitute, the actual viewing angle performance should be confirmed through the manufacturer's detailed technical documentation or application testing.

Q: How does the 30mA current rating of the Kingbright WP934RS/ID affect circuit design?

A: The WP934RS/ID requires three times the current of the 5510403F (30mA versus 10mA). Circuit current-limiting resistor values and power supply capacity must be recalculated to accommodate this higher current draw. The circuit design must be verified to ensure adequate current sourcing capability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts, including the Kingbright WP934RS/ID, maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility with the primary 5510403F component.

Q: What is the difference between the Dialight substitutes in terms of part numbering?

A: The Dialight substitutes represent variations within the Series 551 product line. Each part number corresponds to a specific configuration variant. All maintain compatibility with the 5510403F across mandatory parameters including lens size, mounting type, voltage, and color.