Equivalent & Substitute Parts for 3FS-316

Part Overview

The 3FS-316 is a laminated core power transformer manufactured by Tamura, rated at 2.4VA with through-hole mounting and PC pin termination. This transformer features a single primary winding (115V) and dual secondary windings capable of parallel (8V, 300mA) or series (16V, 150mA) configurations. The part is currently active in production status with RoHS compliance and 2500Vrms isolation voltage rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across alternative manufacturers.

Substiute Parts

3FS-316

TamuraIn Stock: 7723FS-316 Datasheet

Current PartRFQ

ST-3-16

Signal TransformerIn Stock: 1530ST-3-16 Datasheet

DirectRFQ

F16-150

Triad MagneticsIn Stock: 872F16-150 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3FS-316 are classified based on strict electrical and mechanical parameter matching:

Direct Substitutes: Parts that maintain identical electrical specifications (primary voltage, secondary voltage configurations, output current ratings, power rating, isolation voltage) and compatible mechanical form factors (through-hole mounting, PC pin termination, comparable dimensions).

Similar Substitutes: Parts that maintain identical electrical specifications with minor variations in power rating (within 0.1VA tolerance) and comparable mechanical compatibility.

The following parameters determine substitution eligibility:

• Primary voltage: 115V (required match)
• Secondary voltage configurations: Parallel 8V and Series 16V (required match)
• Output current ratings: Parallel 300mA and Series 150mA (required match)
• Isolation voltage: 2500Vrms (required match)
• Core type: Laminated (required match)
• Winding configuration: Single primary, dual secondary, no center tap (required match)
• Mounting and termination: Through hole with PC pin (required match)

Parameter Comparison

Engineering Selection Recommendations

ST-3-16 (Signal Transformer): This part is a direct electrical equivalent to the 3FS-316 with identical power rating (2.4VA) and all electrical specifications. The ST-3-16 is ROHS3 compliant and currently active in production. Mechanical dimensions are slightly smaller (34.90mm L x 28.60mm W x 30.80mm H) compared to the 3FS-316 (35.56mm L x 31.00mm W x 32.10mm H), which may provide advantages in space-constrained applications. Both parts maintain the same through-hole PC pin termination and 2500Vrms isolation rating.

F16-150 (Triad Magnetics): This part maintains identical electrical specifications for voltage and current ratings with a marginally higher power rating of 2.5VA compared to the 3FS-316 at 2.4VA. The F16-150 is ROHS3 compliant and active in production. Mechanical dimensions are comparable to the ST-3-16 (34.93mm L x 28.58mm W x 30.15mm H). The slightly increased power capacity provides additional thermal margin in applications operating near maximum rated current.

Both substitute parts are active products with current RoHS compliance certifications and equivalent electrical performance for the specified dual secondary winding configuration.

Frequently Asked Questions (FAQ)

Q: Can the ST-3-16 be used as a direct replacement for the 3FS-316?

A: Yes. The ST-3-16 maintains identical electrical specifications including primary voltage (115V), secondary voltage configurations (parallel 8V, series 16V), output current ratings (parallel 300mA, series 150mA), power rating (2.4VA), isolation voltage (2500Vrms), and winding configuration (single primary, dual secondary). Both parts use through-hole mounting with PC pin termination and laminated core construction.

Q: What are the dimensional differences between these parts?

A: The 3FS-316 measures 35.56mm L x 31.00mm W x 32.10mm H. The ST-3-16 measures 34.90mm L x 28.60mm W x 30.80mm H. The F16-150 measures 34.93mm L x 28.58mm W x 30.15mm H. The substitute parts are slightly more compact, which may affect PCB layout considerations.

Q: Is the F16-150 suitable for applications designed for the 3FS-316?

A: Yes. The F16-150 provides identical voltage and current specifications with a marginally higher power rating (2.5VA versus 2.4VA). This additional capacity does not create incompatibility; it provides increased thermal margin. All electrical and mechanical parameters for dual secondary winding operation remain equivalent.

Q: What compliance certifications apply to these parts?

A: The 3FS-316 is RoHS Compliant. Both substitute parts (ST-3-16 and F16-150) are ROHS3 Compliant. All three parts carry EAR99 ECCN classification and 8504.31.4035 HTSUS code.

Q: Are there packaging differences between the main part and substitutes?

A: The 3FS-316 is supplied in tube packaging. The ST-3-16 and F16-150 are supplied in box packaging. This affects order quantities and storage considerations but does not impact electrical or mechanical compatibility.

Q: What is the isolation voltage rating for all three parts?

A: All three parts (3FS-316, ST-3-16, and F16-150) maintain a 2500Vrms isolation voltage rating between primary and secondary windings.