Tamura 3FL34-75 Equivalent & Substitute Parts

Part Overview

The Tamura 3FL34-75 is a laminated core power transformer rated at 2.5VA with dual primary and secondary windings. It features selectable output configurations through series/parallel winding connections, supporting both 115V and 230V primary inputs. The transformer is designed for through-hole mounting with PC pin termination and is currently in active production status. Equivalent parts are identified when identical electrical specifications and mechanical compatibility are maintained across alternative manufacturers.

Substiute Parts

3FL34-75

TamuraIn Stock: 7773FL34-75 Datasheet

Current PartRFQ

FP34-75

Triad MagneticsIn Stock: 1202FP34-75 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Tamura 3FL34-75 is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Primary voltage ratings (115V, 230V), secondary voltage outputs in both parallel (17V) and series (34V) configurations, and maximum output current ratings (150mA parallel, 75mA series) must be identical. Power rating of 2.5VA is non-negotiable.

Winding Configuration: Dual primary and dual secondary windings are required to maintain functional compatibility with applications designed for series/parallel switching capability.

Mechanical Compatibility: Through-hole mounting type and PC pin termination style must be preserved. Physical dimensions must remain within acceptable tolerance ranges for PCB footprint compatibility.

Isolation & Safety: Minimum isolation voltage of 1500Vrms is the baseline requirement. Higher isolation ratings do not disqualify a substitute.

Regulatory Compliance: RoHS compliance status must be active or equivalent (RoHS3 acceptable). ECCN and HTSUS classifications remain consistent across qualified substitutes.

The Triad Magnetics FP34-75 meets all substitution criteria through complete electrical equivalence and compatible mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The Tamura 3FL34-75 remains the baseline reference component with active production status and full RoHS compliance certification.

Substitute Eligibility: The Triad Magnetics FP34-75 qualifies as a direct electrical and mechanical equivalent. All critical electrical parameters match exactly. Physical dimensions fall within acceptable PCB footprint tolerances. The FP34-75 provides enhanced isolation voltage (2000Vrms versus 1500Vrms), which represents an improvement in safety margin without introducing incompatibility.

Compliance Considerations: Both components carry equivalent regulatory certifications (RoHS/ROHS3, EAR99, HTSUS 8504.31.4035). The FP34-75 includes REACH Unaffected status, providing additional regulatory clarity for European applications.

Production Status: Both components are in active production, ensuring long-term availability and supply chain stability.

Packaging Consideration: The Tamura 3FL34-75 is supplied in bulk packaging, while the Triad Magnetics FP34-75 is supplied in box packaging. This distinction affects inventory management but does not impact functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Triad Magnetics FP34-75 be used as a direct replacement for the Tamura 3FL34-75 in existing designs?

A: Yes. The FP34-75 is electrically and mechanically equivalent. All primary and secondary voltage ratings, current outputs, winding configurations, and mounting specifications are identical. Physical dimensions are within acceptable tolerance ranges for standard PCB footprints.

Q: What is the significance of the higher isolation voltage rating on the FP34-75?

A: The FP34-75 provides 2000Vrms isolation compared to the 3FL34-75's 1500Vrms. This represents an enhanced safety margin and does not create incompatibility. Applications designed for 1500Vrms isolation operate safely with the higher-rated substitute.

Q: Are there any differences in series/parallel winding operation between these two transformers?

A: No. Both transformers feature identical dual primary and dual secondary winding configurations, enabling the same series/parallel switching functionality. Output specifications are identical: 17V at 150mA (parallel) and 34V at 75mA (series).

Q: How do the packaging differences affect component selection?

A: Packaging (bulk versus box) affects inventory management and handling procedures but does not impact electrical performance or PCB integration. Selection should be based on supply chain and inventory requirements.

Q: Are both components RoHS compliant?

A: Yes. The Tamura 3FL34-75 carries RoHS Compliant certification. The Triad Magnetics FP34-75 carries ROHS3 Compliant certification. Both meet current RoHS requirements and are suitable for applications requiring lead-free component compliance.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by: identical power rating (2.5VA), matching primary voltages (115V, 230V), matching secondary voltages (17V parallel, 34V series), matching output currents (150mA parallel, 75mA series), identical winding configuration (dual primary, dual secondary), compatible mounting type (through-hole), matching termination style (PC pin), and minimum isolation voltage of 1500Vrms.