3FL12-950 Equivalent & Substitute Parts

Part Overview

The 3FL12-950 is a laminated core power transformer manufactured by Tamura, rated at 12VA with dual primary and secondary windings. This through-hole mounted component is designed for applications requiring 115V or 230V primary input with configurable secondary output of 6.3V (parallel) or 12.6V (series). The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

3FL12-950

TamuraIn Stock: 12013FL12-950 Datasheet

Current PartRFQ

FP12-950

Triad MagneticsIn Stock: 794FP12-950 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3FL12-950 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Identical power rating: 12VA
• Matching primary voltage options: 115V and 230V
• Matching secondary voltage configurations: Parallel 6.3V and Series 12.6V
• Matching output current specifications: Parallel 1.9A and Series 950mA
• Equivalent isolation voltage: minimum 1500Vrms

Mechanical Equivalence Requirements:

• Identical core type: Laminated
• Matching winding configuration: Dual primary and dual secondary
• Identical mounting type: Through Hole
• Matching termination style: PC Pin
• Compatible dimensions and height within manufacturing tolerances

The FP12-950 manufactured by Triad Magnetics meets all electrical and mechanical equivalence criteria and is classified as an active product, making it a direct functional substitute for the obsolete 3FL12-950.

Parameter Comparison

Engineering Selection Recommendations

The FP12-950 from Triad Magnetics is a direct functional equivalent to the obsolete 3FL12-950. Selection of the FP12-950 is supported by the following engineering factors:

Product Status: The FP12-950 is classified as active, ensuring ongoing availability and manufacturer support, whereas the 3FL12-950 is obsolete and subject to supply discontinuation.

Electrical Compatibility: All primary and secondary voltage specifications, output current ratings, and isolation voltage requirements are met or exceeded by the FP12-950. The substitute provides 2000Vrms isolation compared to the 1500Vrms specification of the original part, offering enhanced dielectric performance.

Mechanical Compatibility: Dimensions and mounting characteristics are equivalent, with seated height differing by only 0.08mm, well within standard manufacturing tolerances for through-hole transformers.

Regulatory Compliance: The FP12-950 carries ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements. Both parts share identical ECCN and HTSUS classifications.

Packaging: The FP12-950 is supplied in box packaging, suitable for standard component handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the FP12-950 be used as a direct replacement for the 3FL12-950 without circuit modifications?

A: Yes. The FP12-950 meets all electrical and mechanical specifications of the 3FL12-950. Primary voltage options, secondary voltage configurations, output current ratings, winding configurations, mounting type, and termination style are identical. The substitute can be installed in existing PCB layouts without design changes.

Q: What is the significance of the higher isolation voltage in the FP12-950?

A: The FP12-950 provides 2000Vrms isolation compared to the 1500Vrms specification of the 3FL12-950. This represents enhanced dielectric performance and does not create incompatibility. Higher isolation voltage is a superset of the original requirement and improves safety margins in the application.

Q: Are there any height clearance concerns when substituting the FP12-950?

A: The seated height difference is 0.08mm (3FL12-950: 27.05mm maximum; FP12-950: 26.97mm maximum). This variation is within standard manufacturing tolerances for through-hole transformers and does not present clearance issues in typical PCB assemblies.

Q: Why is the 3FL12-950 classified as obsolete?

A: Obsolescence indicates that the manufacturer (Tamura) has discontinued production and support for this part. The FP12-950 provides functional continuity for applications requiring 12VA laminated core transformers with dual primary and secondary windings.

Q: Does the FP12-950 carry environmental compliance certifications?

A: Yes. The FP12-950 is ROHS3 compliant and REACH unaffected, meeting current environmental regulations. The original 3FL12-950 does not specify these certifications, making the substitute advantageous for applications subject to environmental compliance requirements.

Q: Are the primary and secondary winding configurations identical between the two parts?

A: Yes. Both the 3FL12-950 and FP12-950 feature dual primary windings and dual secondary windings with no center tap. This configuration allows for series or parallel connection of secondary windings to achieve 12.6V (series) or 6.3V (parallel) output.

Q: What is the packaging difference between the two parts?

A: The 3FL12-950 packaging is not specified in available documentation. The FP12-950 is supplied in box packaging, which is standard for through-hole transformer components and compatible with automated and manual assembly processes.