LP16-350B5 Equivalent & Substitute Parts

Part Overview

The LP16-350B5 is a 6VA semi-toroidal power transformer manufactured by Pulse Electronics, designed for through-hole mounting applications. This component features dual primary and secondary windings with configurable output voltage (8V parallel or 16V series) and corresponding current ratings (700mA parallel or 350mA series). The part is classified as obsolete, necessitating identification of active equivalent models to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

LP16-350B5

Pulse ElectronicsIn Stock: 839LP16-350B5 Datasheet

Current PartRFQ

3FL16-350

TamuraIn Stock: 8973FL16-350 Datasheet

DirectRFQ

LP-16-350

Signal TransformerIn Stock: 1091LP-16-350 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP16-350B5 is determined by strict equivalence across the following critical parameters:

• Power rating: 6VA
• Secondary voltage configuration: Parallel 8V, Series 16V
• Secondary current capacity: Parallel 700mA, Series 350mA
• Primary winding configuration: Dual
• Secondary winding configuration: Dual
• Mounting type: Through Hole
• Termination style: PC Pin
• Isolation voltage: 1500Vrms

Two active substitute parts meet these criteria. The LP-16-350 (Signal Transformer) maintains identical semi-toroidal construction. The 3FL16-350 (Tamura) employs laminated core construction but delivers equivalent electrical performance across all specified parameters. Both substitutes are currently in active production status with confirmed inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both LP-16-350 and 3FL16-350 are qualified substitutes for the obsolete LP16-350B5 based on electrical parameter equivalence and regulatory compliance.

The LP-16-350 (Signal Transformer) is the preferred direct replacement, maintaining identical semi-toroidal core construction and RoHS3 compliance. Physical dimensions are within 0.13mm on length and 0.07mm on width, ensuring PCB layout compatibility. Current inventory of 1047 units supports immediate procurement.

The 3FL16-350 (Tamura) provides an alternative with laminated core construction. While core type differs, electrical specifications remain equivalent across all critical parameters. This part is RoHS compliant and maintains dimensional compatibility. Current inventory of 858 units is available.

Both substitutes carry identical ECCN and HTSUS classifications, confirming regulatory equivalence to the original part.

Frequently Asked Questions (FAQ)

Q: Can the LP-16-350 directly replace the LP16-350B5 without circuit modification?

A: Yes. The LP-16-350 maintains electrical equivalence across all specified parameters: 6VA power rating, dual primary and secondary windings, 1500Vrms isolation voltage, and identical secondary voltage/current configurations. Physical dimensions are within manufacturing tolerance, supporting direct PCB substitution.

Q: What is the difference between semi-toroidal and laminated core construction?

A: Semi-toroidal and laminated core designs represent different magnetic core geometries. Both configurations in this comparison deliver equivalent electrical performance at the specified 6VA rating and isolation voltage. Core type selection depends on application-specific requirements such as EMI characteristics or thermal performance, which are not differentiated in the provided specifications.

Q: Are there any compliance differences between the substitutes?

A: The LP-16-350 carries ROHS3 compliance, while both the LP16-350B5 and 3FL16-350 carry RoHS compliance. All three parts share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications, confirming regulatory equivalence for export and procurement purposes.

Q: What are the dimensional tolerances for PCB layout compatibility?

A: The LP-16-350 and 3FL16-350 maintain dimensions within 0.13mm length and 0.07mm width of