LED Cluster T3 1/4 37.5V (Dialight 5855327)

Part Overview

The Dialight 5855327 is an LED cluster lamp replacement designed for general purpose lighting applications. It features a T-3 1/4 form factor with a midget flange base, operating at 37.5V forward voltage, and emits green light. The product is currently obsolete, making identification of suitable substitute components essential for maintenance and replacement applications where this lamp type is specified in existing installations.

Substiute Parts

5855327

DialightIn Stock: 11675855327 Datasheet

Current PartRFQ

5855327F

DialightIn Stock: 10945855327F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Dialight 5855327 is determined by the following critical parameters:

• Voltage - Forward (Vf): 37.5V (exact match required)
• Color: Green (exact match required)
• Size / Dimension: T - 3 1/4 (exact match required)
• Configuration: Single (exact match required)
• Series: 585 (same product family)

The substitute part 5855327F maintains identical electrical and optical specifications (voltage, color, and configuration) and the same physical form factor. However, it differs in base type: the original uses a midget flange base, while the substitute uses a miniature bayonet (BA9S) base. This base type difference is the primary distinction between the two parts and must be evaluated against the mechanical requirements of the target application.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5855327F is the direct substitute for the obsolete 5855327. Both parts share identical electrical specifications (37.5V forward voltage), optical properties (green color), and physical dimensions (T-3 1/4 form factor). The 5855327F is currently in active production status, ensuring availability for replacement applications.

The primary consideration for substitution is the base type difference: the original part uses a midget flange base, while the substitute uses a miniature bayonet (BA9S) base. Mechanical compatibility with the socket or fixture must be confirmed before selection.

The 5855327F offers improved compliance status, meeting ROHS3 requirements compared to the non-compliant original part. Both parts maintain identical moisture sensitivity ratings and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Can the 5855327F directly replace the 5855327 in all applications?

A: Electrical and optical compatibility is confirmed. However, the base type differs: the original uses midget flange, while the substitute uses miniature bayonet (BA9S). Mechanical compatibility with the fixture socket must be verified before installation.

Q: What are the key parameters that determine substitution eligibility?

A: Voltage (37.5V), color (green), physical size (T-3 1/4), and configuration (single) must match exactly. The base type is a secondary consideration dependent on fixture compatibility.

Q: Why is the original part obsolete?

A: The 5855327 is listed as obsolete by the manufacturer. The 5855327F represents the current active production alternative within the same product series.

Q: Are there compliance differences between the two parts?

A: Yes. The 5855327F is ROHS3 compliant, while the original 5855327 is RoHS non-compliant. Both maintain identical REACH unaffected status and moisture sensitivity ratings.

Q: What is the inventory status of these parts?

A: The original 5855327 has 1085 pieces in stock (obsolete status). The substitute 5855327F has 1032 pieces available in bulk packaging (active status).