Equivalent & Substitute Parts for 3FS-516 Laminated Power Transformer

Part Overview

The 3FS-516 is a 12VA laminated core power transformer manufactured by Tamura, designed for through-hole mounting applications. It features a single primary winding at 115V and dual secondary windings capable of parallel (8V, 1.6A) or series (16V, 800mA) configurations. The transformer is RoHS Compliant and maintains 2500Vrms isolation voltage, making it suitable for industrial and commercial power supply applications where component substitution may be required due to inventory availability, lead time constraints, or design flexibility requirements.

Substiute Parts

3FS-516

TamuraIn Stock: 8863FS-516 Datasheet

Current PartRFQ

ST-5-16

Signal TransformerIn Stock: 2931ST-5-16 Datasheet

DirectRFQ

F16-800

Triad MagneticsIn Stock: 870F16-800 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3FS-516 is determined by strict electrical and mechanical parameter matching across the following criteria:

Electrical Parameters (Mandatory Match):

• Power rating: 12VA
• Primary voltage: 115V
• Secondary voltage configuration: Parallel 8V / Series 16V
• Output current capability: Parallel 1.6A / Series 800mA
• Isolation voltage: 2500Vrms
• Winding configuration: Single primary, dual secondary, no center tap

Mechanical Parameters (Mandatory Match):

• Core type: Laminated
• Mounting type: Through hole
• Termination style: PC pin

Compliance Parameters:

• RoHS compliance status (RoHS Compliant or ROHS3 Compliant acceptable)
• ECCN and HTSUS classification alignment

The substitute parts ST-5-16 (Signal Transformer) and F16-800 (Triad Magnetics) meet all mandatory electrical and mechanical parameters. Dimensional variations within manufacturing tolerances do not affect functional substitution.

Parameter Comparison

Engineering Selection Recommendations

3FS-516 (Tamura): Active product status with 857 units in stock. RoHS Compliant certification. Suitable for applications requiring the original specified design.

ST-5-16 (Signal Transformer): Active product status with 2843 units in stock. ROHS3 Compliant certification. Highest inventory availability. Dimensions are 0.7mm shorter in length and 1.92mm narrower in width compared to 3FS-516, with 1.1mm reduction in seated height. Packaging in box format.

F16-800 (Triad Magnetics): Active product status with 827 units in stock. ROHS3 Compliant certification. Part of Split Pack™ series with Class 2/3 rating. Dimensions are 0.87mm shorter in length and 1.85mm narrower in width compared to 3FS-516, with 1.5mm reduction in seated height. Packaging in box format.

All three transformers satisfy the electrical and mechanical requirements for direct substitution. Selection should be based on inventory availability, packaging preference, and dimensional constraints within the target application's PCB layout.

Frequently Asked Questions (FAQ)

Q: Can ST-5-16 be used as a direct replacement for 3FS-516?

A: Yes. ST-5-16 meets all mandatory electrical parameters (12VA, 115V primary, 8V/16V secondary, 1.6A/800mA output, 2500Vrms isolation) and mechanical parameters (laminated core, through-hole mounting, PC pin termination). Dimensional differences (0.7mm length, 1.92mm width, 1.1mm height reduction) are within acceptable tolerances for most through-hole applications.

Q: Can F16-800 be used as a direct replacement for 3FS-516?

A: Yes. F16-800 meets all mandatory electrical parameters (12VA, 115V primary, 8V/16V secondary, 1.6A/800mA output, 2500Vrms isolation) and mechanical parameters (laminated core, through-hole mounting, PC pin termination). Dimensional differences (0.87mm length, 1.85mm width, 1.5mm height reduction) are within acceptable tolerances for most through-hole applications.

Q: What are the key differences between the three transformers?

A: All three transformers are electrically identical. Primary differences are manufacturer (Tamura, Signal Transformer, Triad Magnetics), packaging format (tube vs. box), inventory levels, and minor dimensional variations. ST-5-16 offers the highest inventory availability (2843 units). Dimensional variations are less than 2mm across all axes.

Q: Are there compliance differences between these parts?

A: 3FS-516 carries RoHS Compliant certification. ST-5-16 and F16-800 carry ROHS3 Compliant certification. Both compliance levels are acceptable for equivalent substitution. All three share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications.

Q: Does packaging format affect substitution eligibility?

A: No. Packaging format (tube vs. box) does not affect electrical or mechanical substitution eligibility. It may impact handling, storage, and logistics considerations but does not affect component functionality or PCB integration.

Q: What is the significance of the dimensional differences?

A: Dimensional variations between the three transformers are minor (less than 2mm across all axes). These differences are within standard manufacturing tolerances for laminated transformers. Substitution is valid provided the target PCB layout accommodates the maximum dimensions of the substitute part.