Equivalent & Substitute Parts for Tamura 3FD-356 Laminated Power Transformer

Part Overview

The Tamura 3FD-356 is a laminated core power transformer rated at 2.4VA with dual primary and secondary windings. It supports input voltages of 115V or 230V and delivers output configurations of 28V parallel (90mA) or 56V series (45mA). The component is designed for through-hole mounting with PC pin termination and maintains 2500Vrms isolation voltage. This transformer is currently in active production status with RoHS compliance certification. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, lead time considerations, or design flexibility needs.

Substiute Parts

3FD-356

TamuraIn Stock: 8503FD-356 Datasheet

Current PartRFQ

FS56-045

Triad MagneticsIn Stock: 947FS56-045 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Tamura 3FD-356 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Primary voltage options must include both 115V and 230V
• Secondary voltage outputs must support both 28V parallel and 56V series configurations
• Output current ratings must match: 90mA parallel and 45mA series
• Isolation voltage must be 2500Vrms or greater
• Power rating must be 2.4VA or higher

Mechanical Equivalence Requirements:

• Core type must be laminated
• Mounting configuration must be through-hole
• Termination must be PC pin style
• Physical dimensions must accommodate PCB layout constraints
• Dual primary and dual secondary winding configuration required

Compliance Requirements:

• Active product status
• RoHS compliance certification

The Triad Magnetics FS56-045 meets all substitution criteria with identical electrical specifications and compatible mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (Tamura 3FD-356): The Tamura 3FD-356 is the specified component with active production status, RoHS compliance, and full inventory availability (832 pieces). This part is suitable for new designs and production builds where the original specification is maintained.

Substitute Part Selection (Triad Magnetics FS56-045): The Triad Magnetics FS56-045 is a qualified substitute with identical electrical performance across all critical parameters. The FS56-045 provides a 0.1VA power rating advantage (2.5VA vs. 2.4VA), which offers additional design margin. Physical dimensions are slightly smaller, resulting in a lower seated height (30.15mm vs. 32.10mm), which may provide PCB layout advantages. Both parts maintain 2500Vrms isolation voltage and support identical voltage/current configurations. The FS56-045 carries ROHS3 compliance certification and is actively produced with 932 pieces in inventory.

Compliance Basis: Both parts are RoHS compliant and actively produced. Selection between these parts is based on availability, packaging preference (Tube vs. Box), and dimensional constraints specific to the application circuit board layout.

Frequently Asked Questions (FAQ)

Q: Can the Triad Magnetics FS56-045 directly replace the Tamura 3FD-356 in existing designs?

A: Yes. The FS56-045 provides identical electrical specifications for primary voltage (115V/230V), secondary voltage outputs (28V parallel, 56V series), and current ratings (90mA parallel, 45mA series). Both parts feature dual primary and secondary windings with PC pin termination and 2500Vrms isolation. The FS56-045 has a slightly lower seated height (30.15mm vs. 32.10mm), which is compatible with through-hole PCB mounting.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution requires matching on: (1) Primary voltage options (115V and 230V), (2) Secondary voltage configurations (28V parallel and 56V series), (3) Output current ratings (90mA parallel and 45mA series), (4) Isolation voltage (2500Vrms), (5) Power rating (2.4VA minimum), and (6) Winding configuration (dual primary, dual secondary, no center tap).

Q: Are there packaging differences between these parts?

A: Yes. The Tamura 3FD-356 is supplied in Tube packaging, while the Triad Magnetics FS56-045 is supplied in Box packaging. Both are through-hole mounted components with PC pin termination. Packaging selection depends on assembly process requirements and inventory handling procedures.

Q: Do both parts meet current RoHS requirements?

A: Yes. The Tamura 3FD-356 is RoHS Compliant, and the Triad Magnetics FS56-045 is ROHS3 Compliant. Both parts satisfy RoHS directive requirements for new designs and production applications.

Q: What is the physical size difference between these transformers?

A: The Tamura 3FD-356 measures 35.56mm L × 31.00mm W × 32.10mm H (seated). The Triad Magnetics FS56-045 measures 34.93mm L × 28.58mm W × 30.15mm H (seated). The FS56-045 has a smaller footprint and lower profile, which may provide advantages in space-constrained PCB layouts.

Q: Is the higher power rating of the FS56-045 (2.5VA vs. 2.4VA) significant?

A: The 0.1VA difference represents approximately 4% additional capacity. This provides additional design margin but does not change the functional equivalence for applications designed to the 2.4VA specification. Both parts deliver identical output current ratings of 90mA (parallel) and 45mA (series).