Dialight 5855527 LED Cluster T3 1/4 37.5V Equivalent & Substitute Parts

Part Overview

The Dialight 5855527 is an LED lamp replacement cluster in T-3 1/4 form factor rated at 37.5V with a yellow midget flange base. This component is classified as obsolete, making identification of compatible substitute parts essential for system maintenance and component sourcing. The part was designed for general purpose lighting applications requiring midget flange base configuration.

Substiute Parts

5855527

DialightIn Stock: 8445855527 Datasheet

Current PartRFQ

5855527F

DialightIn Stock: 10445855527F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Dialight 5855527 is determined by the following critical parameters:

• Voltage Rating: 37.5V forward voltage (Vf) is the primary electrical constraint
• Form Factor: T-3 1/4 size dimension must be maintained
• Color: Yellow wavelength specification
• Configuration: Single LED configuration
• Series Compatibility: 585 series designation

The substitute part 5855527F maintains electrical compatibility through identical voltage rating and form factor. However, the base type differs from the original midget flange configuration, changing from Midget Flange to Miniature Bayonet (BA9S). This represents a mechanical interface change that must be evaluated for socket compatibility in the target application.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5855527F serves as the active substitute for the obsolete 5855527. Both parts share identical electrical specifications (37.5V) and form factor (T-3 1/4), with matching yellow color and single configuration.

The primary consideration for substitution is the base type change from Midget Flange to Miniature Bayonet (BA9S). This mechanical difference requires socket compatibility verification in the target application. The 5855527F offers the advantage of active product status and ROHS3 compliance, compared to the obsolete, RoHS non-compliant status of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 5855527F directly replace the 5855527 in all applications?

A: Electrical compatibility is confirmed through matching 37.5V ratings and T-3 1/4 form factor. However, the base type change from Midget Flange to Miniature Bayonet (BA9S) requires verification that the receiving socket accommodates the BA9S configuration.

Q: What is the significance of the product status change from Obsolete to Active?

A: The 5855527F is an active product with current manufacturing and availability, whereas the 5855527 is obsolete. This affects long-term sourcing capability and supply chain reliability.

Q: How does RoHS compliance differ between these parts?

A: The original 5855527 is RoHS non-compliant, while the 5855527F meets ROHS3 compliance standards. This distinction is relevant for applications subject to RoHS regulatory requirements.

Q: Are the electrical specifications identical between the two parts?

A: Yes. Both parts are rated at 37.5V forward voltage, feature yellow color, single configuration, and T-3 1/4 dimensions. The electrical performance parameters are equivalent.

Q: What packaging options are available for the substitute part?

A: The 5855527F is supplied in bulk packaging, with 1028 pieces available in current inventory.