Dialight 5219054 Neon Lamp Equivalent & Substitute Parts

Part Overview

The Dialight 5219054 is a neon lamp designed for indicator and signaling applications requiring 125V operation. This component features a clear lens with round domed top configuration and miniature bayonet lead style, classified as RT-3 1/4 size. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing maintenance and new design implementations where this lamp type is specified.

Substiute Parts

5219054

DialightIn Stock: 11315219054 Datasheet

Current PartRFQ

B2A

CEC IndustriesIn Stock: 946B2A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for neon lamps is determined by compatibility across the following critical parameters:

• Voltage Rating: Operating voltage must match or be within acceptable tolerance for the application circuit
• Lens Size: Physical dimensions must accommodate the lamp socket and optical requirements
• Lead Style: Bayonet configuration must be compatible with existing socket connections
• Type: Neon lamp category must remain consistent
• Color: Clear lens specification must be maintained for optical consistency

The CEC Industries B2A neon lamp is listed as a substitute based on comparable neon lamp construction and bayonet base configuration. However, voltage rating and lens size parameters differ from the Dialight 5219054 and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5219054 is discontinued, requiring alternative sourcing for replacement and new applications. The CEC Industries B2A is listed as a substitute option; however, the following parameter differences require circuit-level evaluation:

• Voltage differential: The B2A operates at 105V versus the 5219054 specification of 125V. This 20V difference affects lamp brightness and operational characteristics and must be validated against circuit design parameters.
• Lens size designation: RT-3 1/4 versus T-3.25 represent different physical and optical specifications. Mechanical fit and optical performance must be confirmed for the target application.
• Lead configuration: Both use bayonet connections but differ in contact configuration (miniature versus BA9S single contact). Socket compatibility must be verified.

Selection of the B2A as a substitute should be based on documented compatibility with the specific application circuit and mechanical assembly, not on parameter similarity alone.

Frequently Asked Questions (FAQ)

Q: Can the CEC Industries B2A directly replace the Dialight 5219054?

A: Direct replacement requires verification of three factors: circuit voltage tolerance (105V versus 125V operation), mechanical socket compatibility (miniature bayonet versus BA9S bayonet), and optical requirements (lens size and color). These parameters must be confirmed against your specific application before substitution.

Q: What does the voltage rating difference mean for operation?

A: The Dialight 5219054 is rated for 125V operation, while the CEC Industries B2A is rated for 105V. Operating a 105V lamp at 125V may reduce lamp life or cause premature failure. Operating a 125V lamp at 105V may result in reduced brightness. Circuit design must accommodate the selected lamp's voltage rating.

Q: Are the lens sizes interchangeable?

A: RT-3 1/4 and T-3.25 are different lens size designations. While numerically similar, they represent distinct physical specifications. Mechanical fit within the lamp socket and optical performance characteristics may differ. Physical verification is required.

Q: What is the significance of the bayonet lead style difference?

A: The Dialight 5219054 uses miniature bayonet leads, while the CEC Industries B2A uses BA9S bayonet with single contact configuration. These are different mechanical interfaces. Socket compatibility must be confirmed before substitution.

Q: Does RoHS compliance affect substitution decisions?

A: The Dialight 5219054 is ROHS3 compliant. RoHS compliance status for the CEC Industries B2A is not specified in available data. If RoHS compliance is a requirement for your application, this must be verified with the manufacturer before selection.