3FL40-150 Equivalent & Substitute Parts

Part Overview

The 3FL40-150 is a laminated core power transformer manufactured by Tamura, rated at 6VA with dual primary and secondary windings. This through-hole mounted component features selectable output configurations: 20V at 300mA in parallel mode or 40V at 150mA in series mode, with primary voltage options of 115V or 230V. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Substiute Parts

3FL40-150

TamuraIn Stock: 12143FL40-150 Datasheet

Current PartRFQ

FP40-150

Triad MagneticsIn Stock: 1030FP40-150 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3FL40-150 is determined by strict electrical and mechanical parameter matching. The following criteria establish functional equivalence:

Electrical Parameters (Required Match):

• Power rating: 6VA
• Primary voltage options: 115V and 230V
• Secondary voltage configurations: Parallel 20V / Series 40V
• Output current capacity: Parallel 300mA / Series 150mA
• Winding configuration: Dual primary and dual secondary
• Core type: Laminated

Mechanical Parameters (Required Match):

• Mounting type: Through Hole
• Termination style: PC Pin
• Physical dimensions: Within manufacturing tolerance (±0.5mm acceptable for L/W; ±1mm for height)

Compliance Parameters:

• ECCN classification: EAR99
• HTSUS code: 8504.31.4035

The FP40-150 from Triad Magnetics meets all electrical and mechanical requirements for direct substitution. Dimensional variations (47.63mm vs 47.60mm L; 39.67mm vs 39.60mm W; 22.23mm vs 21.60mm height) remain within acceptable manufacturing tolerances for through-hole PCB mounting. Isolation voltage enhancement (2000Vrms vs 1500Vrms) provides additional safety margin without affecting circuit compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: FP40-150 (Triad Magnetics)

The FP40-150 is the direct functional equivalent for the obsolete 3FL40-150. Selection of this substitute is based on:

1. Electrical Equivalence: All voltage, current, and power specifications match exactly. Dual primary and secondary winding configurations are identical, ensuring compatibility with existing circuit designs without modification.

2. Mechanical Compatibility: Through-hole mounting and PC pin termination are identical. Dimensional variations fall within standard manufacturing tolerances for PCB assembly, requiring no layout redesign.

3. Product Status Advantage: The FP40-150 is classified as active, ensuring long-term availability and supply chain continuity compared to the obsolete 3FL40-150.

4. Compliance Alignment: Both parts share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications, maintaining regulatory consistency.

5. Enhanced Isolation: The FP40-150 provides 2000Vrms isolation versus 1500Vrms on the original part, offering improved safety margin without affecting circuit operation.

6. Packaging: The FP40-150 is supplied in box packaging, standard for component distribution and inventory management.

Frequently Asked Questions (FAQ)

Q: Can the FP40-150 be used as a direct replacement for the 3FL40-150 without circuit modification?

A: Yes. The FP40-150 matches all electrical specifications (6VA, 115V/230V primary, 20V/40V secondary, 300mA/150mA output) and mechanical parameters (through-hole, PC pin termination, compatible dimensions). No circuit redesign is required.

Q: What is the significance of the dimension differences between the two parts?

A: The FP40-150 dimensions (47.63mm L × 39.67mm W × 22.23mm H) differ slightly from the 3FL40-150 (47.60mm L × 39.60mm W × 21.60mm H). These variations are within standard manufacturing tolerances for through-hole transformers and do not affect PCB mounting or circuit operation.

Q: Why does the FP40-150 have higher isolation voltage (2000Vrms vs 1500Vrms)?

A: The enhanced isolation specification on the FP40-150 represents an improvement in safety margin and dielectric strength. This does not affect circuit compatibility and provides additional protection against voltage transients.

Q: Are there any compliance or regulatory differences between the two parts?

A: No. Both parts share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications, ensuring equivalent regulatory treatment for export, import, and tariff purposes.

Q: What is the availability status of each part?

A: The 3FL40-150 is classified as obsolete with 1116 units in current inventory. The FP40-150 is active with 965 units in stock, providing assured long-term availability for new designs and ongoing production support.

Q: Are the winding configurations identical between the two parts?

A: Yes. Both parts feature dual primary windings and dual secondary windings with no center tap, enabling identical voltage and current configuration options (parallel or series operation).