Dialight 5851425 LED Yellow Midget Flange 28V - Equivalent & Substitute Parts

Part Overview

The Dialight 5851425 is an LED-based yellow indicator lamp with a midget flange base designed for 28V operation. This component functions as a direct replacement for incandescent midget flange base lamps in indicator light applications. The part is classified as obsolete, making identification of suitable substitute components essential for system maintenance and new design implementations. Equivalent parts must maintain compatibility with the midget flange base form factor and support the same voltage and color specifications.

Substiute Parts

5851425

DialightIn Stock: 9295851425 Datasheet

Current PartRFQ

5851411F

DialightIn Stock: 6525851411F Datasheet

Parametric EquivalentRFQ

VC1510145UY3

Visual Communications Company - VCCIn Stock: 1218VC1510145UY3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Dialight 5851425 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Base Type: Midget Flange (mechanical fit requirement)
• Size / Dimension: T - 1 3/4 (form factor requirement)
• Color: Yellow (optical specification)
• Voltage - Forward (Vf): 28V (electrical requirement)
• Configuration: Single (circuit configuration)

Substitution Categories:

Parametric Equivalent (5851411F): This Dialight part shares the same manufacturer lineage, identical base type, size, color, and wavelength. The primary difference is voltage rating (6V vs. 28V), which disqualifies it as a direct substitute for 28V applications but qualifies it as an equivalent for 6V systems using the same mechanical and optical specifications.

Similar Equivalent (VC1510145UY3): This Visual Communications Company part maintains all critical compatibility parameters: midget flange base, T - 1 3/4 size, yellow color, and 28V voltage rating. The wavelength specification (587nm vs. 585nm) falls within acceptable yellow LED spectrum tolerances. This part is functionally compatible for direct substitution in 28V yellow indicator lamp applications.

Parameter Comparison

Engineering Selection Recommendations

For 28V Yellow Indicator Lamp Applications:

The VC1510145UY3 (Visual Communications Company) is the appropriate substitute for the obsolete Dialight 5851425. This part maintains voltage compatibility (28V), identical mechanical form factor (T - 1 3/4 midget flange base), and color specification (yellow). The part carries active product status and ROHS3 compliance certification, supporting modern procurement and environmental regulatory requirements.

For 6V Yellow Indicator Lamp Applications:

The 5851411F (Dialight) serves as the equivalent part for systems operating at 6V. This part maintains the same base type, size, and color specifications while offering ROHS3 compliance and active product status.

Compliance Considerations:

Both substitute parts (5851411F and VC1510145UY3) are ROHS3 compliant, whereas the original 5851425 is RoHS non-compliant. Systems requiring RoHS compliance must transition to one of the active substitute parts. The VC1510145UY3 is recommended for new designs and replacements in 28V systems due to its active status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5851411F replace the 5851425 in a 28V circuit?

A: No. The 5851411F is rated for 6V operation, while the 5851425 requires 28V. Voltage mismatch will result in component failure or inadequate illumination. Use only voltage-rated equivalents for your specific application.

Q: What is the difference between the 585nm and 587nm wavelengths?

A: Both wavelengths fall within the yellow LED spectrum range. The 2nm difference is within standard yellow LED color tolerances and does not affect visual appearance or functional compatibility in indicator light applications.

Q: Why is the VC1510145UY3 rated at 280mcd while the 5851425 is only 20mcd?

A: The millicandela rating indicates luminous intensity. The VC1510145UY3 provides significantly higher brightness. Verify that your application circuit can accommodate the higher light output, or confirm that increased brightness is acceptable for your indicator function.

Q: Are both substitute parts available in the same packaging as the original?

A: The 5851425 was supplied in standard packaging. Both substitute parts (5851411F and VC1510145UY3) are available in bulk packaging. Confirm packaging requirements with your procurement specification before ordering.

Q: Does the midget flange base fit all indicator lamp sockets?

A: The midget flange base is a standardized form factor. All parts listed (5851425, 5851411F, and VC1510145UY3) use identical midget flange base specifications and are mechanically interchangeable in sockets designed for this base type.

Q: Which part should I select for new equipment designs?

A: For 28V applications, select the VC1510145UY3. For 6V applications, select the 5851411F. Both parts carry active product status and ROHS3 compliance, meeting current regulatory and procurement standards.