3FL16-350 Equivalent & Substitute Parts Reference

Part Overview

The 3FL16-350 is a laminated core power transformer manufactured by Tamura, rated at 6VA with through-hole mounting and PC pin termination. This transformer features dual primary and secondary windings, supporting input voltages of 115V or 230V with output configurations of 8V parallel (700mA) or 16V series (350mA). The component is RoHS compliant and maintains an isolation voltage of 1500Vrms. As an active product with current inventory availability, equivalent substitute parts may be required for supply chain optimization, design flexibility, or application-specific performance requirements.

Substiute Parts

3FL16-350

TamuraIn Stock: 8973FL16-350 Datasheet

Current PartRFQ

FP16-375

Triad MagneticsIn Stock: 1517FP16-375 Datasheet

DirectRFQ

LP-16-350

Signal TransformerIn Stock: 1091LP-16-350 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3FL16-350 are qualified based on the following critical parameters that determine functional equivalence:

Mandatory Matching Parameters:

• Power rating: 6VA
• Primary voltage options: 115V, 230V
• Secondary voltage configuration: 8V parallel and 16V series
• Output current capability: 700mA parallel, 350mA series
• Dual primary and dual secondary winding configuration
• Through-hole mounting with PC pin termination
• Isolation voltage: minimum 1500Vrms

Allowable Variations:

• Core type (laminated, semi-toroidal, or flat pack designs)
• Physical dimensions within PCB layout tolerance
• Packaging format (bulk or box)
• Enhanced isolation voltage ratings
• RoHS compliance variants (RoHS Compliant or ROHS3 Compliant)

The two substitute parts listed below meet all mandatory parameters while offering design alternatives in core construction and isolation performance.

Parameter Comparison

Engineering Selection Recommendations

3FL16-350 (Tamura - Original Part)

Select this part for applications requiring the original laminated core design with standard 1500Vrms isolation. Suitable for general-purpose power supply applications where the specified isolation voltage is sufficient. RoHS compliant for environmental regulations. Current inventory of 858 units supports immediate procurement.

FP16-375 (Triad Magnetics - Flat Pack™ Series)

This substitute offers enhanced isolation voltage at 2000Vrms, providing additional safety margin for high-voltage isolation requirements. The Flat Pack™ design delivers slightly higher output current capability (375mA series, 750mA parallel) compared to the original specification. ROHS3 compliance indicates updated environmental standards. Height dimension increases to 22.22mm; verify PCB clearance before selection. Inventory of 1434 units ensures supply availability. Select this part when enhanced isolation performance is required.

LP-16-350 (Signal Transformer - Semi-Toroidal)

This substitute maintains identical electrical specifications to the original part (350mA series, 700mA parallel) with semi-toroidal core construction. Dimensions closely match the original (47.50mm L x 39.60mm W x 21.60mm H), minimizing PCB layout modifications. ROHS3 compliance and REACH unaffected status provide regulatory assurance. Inventory of 1047 units supports procurement. Select this part for direct form-fit-function replacement with alternative core technology.

Frequently Asked Questions (FAQ)

Q: Can FP16-375 be used as a direct replacement for 3FL16-350?

A: FP16-375 is electrically compatible with 3FL16-350 for all standard applications. The higher output current rating (375mA vs. 350mA series) and enhanced isolation voltage (2000Vrms vs. 1500Vrms) provide performance headroom. Verify PCB height clearance, as FP16-375 seated height is 22.22mm compared to 21.60mm for the original part.

Q: What is the difference between laminated and semi-toroidal core designs?

A: Both core types are provided in the substitute options. Laminated cores (3FL16-350 and FP16-375) use stacked steel laminations. Semi-toroidal cores (LP-16-350) use a toroidal geometry with reduced height profile. Core type selection depends on application-specific requirements for EMI performance, size constraints, and thermal characteristics. All three parts meet the specified 6VA power rating and voltage/current parameters.

Q: Are all three parts RoHS compliant?

A: Yes. The original 3FL16-350 is RoHS Compliant. Both substitutes (FP16-375 and LP-16-350) are ROHS3 Compliant, indicating compliance with the updated RoHS 3 directive. All parts are suitable for applications requiring environmental compliance.

Q: What is the isolation voltage difference, and does it matter?

A: The original 3FL16-350 and LP-16-350 provide 1500Vrms isolation. FP16-375 provides 2000Vrms isolation. Higher isolation voltage provides additional safety margin in applications with high-voltage input or where enhanced electrical isolation is required. For standard applications operating within 1500Vrms specifications, all three parts are equivalent.

Q: Can I use LP-16-350 as a drop-in replacement?

A: LP-16-350 is a form-fit-function equivalent with nearly identical dimensions (47.50mm L x 39.60mm W x 21.60mm H). The semi-toroidal core design offers an alternative to the laminated core without electrical performance changes. This part is suitable for direct PCB replacement with minimal or no layout modifications.

Q: What packaging differences exist between these parts?

A: 3FL16-350 and LP-16-350 are supplied in bulk packaging. FP16-375 is supplied in box packaging. Bulk packaging is typically used for high-volume manufacturing, while box packaging may include additional documentation or protective materials. Packaging format does not affect electrical or mechanical compatibility.