LP24-250B9 Equivalent & Substitute Parts

Part Overview

The LP24-250B9 is a 6VA semi-toroidal power transformer manufactured by Pulse Electronics, designed for through-hole mounting applications. It features dual primary and secondary windings with output configurations of parallel 12V/500mA or series 24V/250mA. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LP24-250B9

Pulse ElectronicsIn Stock: 761LP24-250B9 Datasheet

Current PartRFQ

3FL24-250

TamuraIn Stock: 24133FL24-250 Datasheet

DirectRFQ

LP-24-250

Signal TransformerIn Stock: 1029LP-24-250 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP24-250B9 are qualified based on the following critical parameters:

• Identical power rating of 6VA
• Matching secondary voltage outputs in both parallel (12V) and series (24V) configurations
• Equivalent current output specifications (parallel 500mA, series 250mA)
• Dual primary and dual secondary winding architecture
• Through-hole mounting with PC pin termination
• 1500Vrms isolation voltage
• Compatible physical dimensions within manufacturing tolerances
• RoHS compliance status

The two identified substitutes meet all these criteria while offering active product status and improved availability compared to the obsolete main part.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain full electrical and mechanical compatibility with the LP24-250B9 specification. Selection between alternatives should be based on the following factors:

3FL24-250 (Tamura): Features a laminated core construction with active product status and established inventory availability. RoHS compliance is confirmed. This option provides a direct functional replacement with alternative core technology.

LP-24-250 (Signal Transformer): Maintains semi-toroidal core construction identical to the original part, ensuring electromagnetic performance characteristics. ROHS3 compliance provides enhanced regulatory alignment. This option offers the closest design continuity with the obsolete part.

Both parts satisfy REACH compliance and EAR99 export classification requirements. Physical dimensions are within acceptable manufacturing tolerances for through-hole PCB mounting applications.

Frequently Asked Questions (FAQ)

Q: Can the 3FL24-250 replace the LP24-250B9 despite different core types?

A: Yes. Both semi-toroidal and laminated core transformers meeting the specified 6VA power rating, dual winding configuration, and identical secondary voltage/current outputs are functionally equivalent for this application. Core type differences do not affect electrical compatibility when all performance parameters match.

Q: Are there any physical mounting differences between these parts?

A: Physical dimensions are within manufacturing tolerances. All three parts are specified for through-hole mounting with PC pin termination. PCB layout compatibility is maintained across all substitutes.

Q: What is the significance of ROHS3 compliance on the LP-24-250?

A: ROHS3 represents an updated compliance designation. Both RoHS and ROHS3 compliant parts meet the same environmental and hazardous substance restrictions. The LP-24-250 designation indicates compliance with the current regulatory standard.

Q: Can I use these substitutes interchangeably in existing designs?

A: Yes, provided the PCB layout accommodates the specified through-hole pin configuration and physical dimensions. All three parts deliver identical electrical performance within the stated parameters.

Q: Why is the LP24-250B9 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Pulse Electronics. The identified substitutes from Tamura and Signal Transformer provide active, in-stock alternatives with equivalent specifications.