LED Midget Flange Base 6V Red 5851111 Equivalent & Substitute Parts

Part Overview

The Dialight 5851111 is an LED lamp replacement designed for midget flange base applications operating at 6V with red color output (630nm wavelength). This component is classified as obsolete, making substitute parts necessary for ongoing system maintenance and new production requirements. The 5851111 series provides incandescent lamp replacement functionality for indicator light applications across various industrial and commercial equipment.

Substiute Parts

5851111

DialightIn Stock: 8065851111 Datasheet

Current PartRFQ

5851111F

DialightIn Stock: 9135851111F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5851111 is determined by strict equivalence across the following critical parameters:

• Base Type: Midget Flange (mechanical compatibility requirement)
• Size / Dimension: T - 1 3/4 (form factor requirement)
• Voltage - Forward (Vf): 6V (electrical compatibility requirement)
• Color: Red (functional requirement)
• Wavelength: 630nm (optical specification requirement)
• Millicandela Rating: 37mcd (brightness specification requirement)
• Configuration: Single (electrical configuration requirement)

The substitute part 5851111F maintains identical specifications across all critical parameters, ensuring direct functional and mechanical compatibility with applications originally designed for the 5851111.

Parameter Comparison

Engineering Selection Recommendations

The 5851111F serves as the direct active production equivalent for the obsolete 5851111. Selection of the 5851111F is appropriate for applications requiring:

• Continued supply of midget flange base red LED lamps at 6V
• ROHS3 compliance for new production or regulated applications
• Active manufacturer support and ongoing availability

The 5851111 remains suitable for legacy system maintenance where RoHS compliance is not a requirement and existing inventory is available. The 5851111F provides identical electrical and optical performance with improved regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can the 5851111F directly replace the 5851111 in existing applications?

A: Yes. The 5851111F maintains identical specifications for base type, size, voltage, color, wavelength, and brightness rating. Direct mechanical and electrical compatibility is confirmed.

Q: What is the primary difference between these parts?

A: The 5851111F is the active production part with ROHS3 compliance, while the 5851111 is obsolete and RoHS non-compliant. Functional performance is identical.

Q: Are there packaging differences between the two parts?

A: The 5851111F is supplied in bulk packaging, while the 5851111 packaging specification is not defined. This does not affect component functionality or compatibility.

Q: Which part should be selected for new designs?

A: The 5851111F should be selected for new designs due to its active product status and ROHS3 compliance.

Q: Do these parts have different moisture sensitivity requirements?

A: The 5851111F has an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. The 5851111 MSL is not applicable. This does not affect substitution compatibility for standard applications.