PF24-10 Semi-Toroidal Power Transformer Equivalent & Substitute Parts

Part Overview

The PF24-10 is a semi-toroidal power transformer manufactured by Tamura, rated at 24VA with dual primary and secondary windings. This transformer operates at 115V or 230V primary input and delivers parallel 5V or series 10V secondary output. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

PF24-10

TamuraIn Stock: 1007PF24-10 Datasheet

Current PartRFQ

LP-10-2400

Signal TransformerIn Stock: 1205LP-10-2400 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PF24-10 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Power rating of 24VA
• Primary voltage options of 115V and 230V
• Secondary voltage configuration delivering parallel 5V and series 10V
• Maximum output current of parallel 4.8A and series 2.4A
• Dual primary and dual secondary winding architecture
• Isolation voltage of 1500Vrms

Mechanical and Installation Requirements:

• Semi-toroidal transformer type
• Through-hole mounting configuration
• PC pin termination style
• Physical dimensions compatible with 72mm length and 58mm width envelope
• Maximum seated height of 31.80mm

The LP-10-2400 manufactured by Signal Transformer meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent for the obsolete PF24-10.

Parameter Comparison

Engineering Selection Recommendations

The LP-10-2400 is the appropriate substitute for the obsolete PF24-10 based on the following factors:

Electrical Equivalence: All primary and secondary voltage specifications, current ratings, winding configurations, and isolation voltage requirements are identical between the two parts.

Mechanical Compatibility: Both transformers share the same semi-toroidal form factor, through-hole mounting configuration, PC pin termination, and maximum seated height. Dimensional variations (72.90mm vs 72.00mm length; 57.20mm vs 58.00mm width) fall within typical PCB layout tolerances for through-hole mounted components.

Product Status and Compliance: The LP-10-2400 is classified as active, ensuring ongoing availability and supply chain continuity. The Signal Transformer part carries ROHS3 compliance certification, meeting current environmental and regulatory standards. Both parts share identical ECCN and HTSUS classifications, confirming regulatory equivalence.

Regulatory Alignment: The LP-10-2400 maintains the same export control classification (EAR99) and tariff code (8504.31.4035) as the original PF24-10, supporting seamless procurement and documentation.

Frequently Asked Questions (FAQ)

Q: Can the LP-10-2400 be used as a direct replacement for the PF24-10 without circuit modifications?

A: Yes. The LP-10-2400 meets all specified electrical parameters including power rating, primary and secondary voltages, output current ratings, winding configurations, and isolation voltage. Mechanical compatibility is confirmed through identical mounting type, termination style, and maximum seated height. Minor dimensional variations are within standard PCB layout tolerances.

Q: What is the significance of the PF24-10 being classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Tamura and existing inventory will eventually deplete. The LP-10-2400 provides a functionally equivalent alternative from an active manufacturer, ensuring long-term component availability for system maintenance and new production builds.

Q: Are there compliance differences between the PF24-10 and LP-10-2400?

A: Both parts share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications. The LP-10-2400 carries ROHS3 compliance certification, which represents current environmental standards. This compliance status does not affect electrical or mechanical substitution compatibility.

Q: How do the physical dimensions compare between these two transformers?

A: The LP-10-2400 measures 72.90mm length and 57.20mm width, compared to the PF24-10 at 72.00mm length and 58.00mm width. Both share identical maximum seated height of 31.80mm. These dimensional variations are within standard tolerances for through-hole mounted semi-toroidal transformers and do not impact PCB layout compatibility.

Q: What packaging format is available for the LP-10-2400?

A: The LP-10-2400 is supplied in bulk packaging, compared to the PF24-10 which does not specify packaging format. Bulk packaging is standard for through-hole mounted transformers and does not affect component functionality or installation procedures.