Equivalent & Substitute Parts for 3FS-236 Laminated Power Transformer

Part Overview

The 3FS-236 is a laminated core power transformer manufactured by Tamura, rated at 1.1VA with a 115V primary voltage and dual secondary windings configured for either 18V parallel or 36V series output. This through-hole mounted component is designed for Class 2/3 applications requiring electrical isolation and is currently in active production status with RoHS compliance certification.

Substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility within the defined parameter tolerances for this transformer category.

Substiute Parts

3FS-236

TamuraIn Stock: 8693FS-236 Datasheet

Current PartRFQ

F28-1300

Triad MagneticsIn Stock: 776F28-1300 Datasheet

SimilarRFQ

F36-030

Triad MagneticsIn Stock: 950F36-030 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3FS-236 are classified based on strict electrical and mechanical parameter alignment:

Direct Electrical Equivalents: Parts that maintain identical primary voltage (115V), secondary voltage outputs (18V parallel / 36V series), output current ratings (60mA parallel / 30mA series), power rating (1.1VA), core type (laminated), and isolation voltage (2500Vrms).

Mechanical Compatibility: Parts must feature through-hole mounting with PC pin termination to ensure PCB integration compatibility.

Qualifying Criteria for Substitution:

• Primary voltage: 115V (exact match required)
• Secondary voltage parallel: 18V (exact match required)
• Secondary voltage series: 36V (exact match required)
• Output current parallel: 60mA (exact match required)
• Output current series: 30mA (exact match required)
• Power rating: 1.1VA (exact match required)
• Core type: Laminated (exact match required)
• Mounting: Through hole (exact match required)
• Termination: PC pin (exact match required)
• Isolation voltage: 2500Vrms (exact match required)
• Dual secondary windings (exact match required)

Parameter Comparison

Engineering Selection Recommendations

F36-030 (Triad Magnetics) - Direct Equivalent:

The F36-030 meets all electrical and mechanical parameters of the 3FS-236. Both transformers feature identical primary voltage (115V), secondary voltage configurations (18V parallel / 36V series), output current ratings (60mA parallel / 30mA series), power rating (1.1VA), laminated core construction, through-hole mounting, PC pin termination, and 2500Vrms isolation voltage. Both parts maintain active production status with current RoHS compliance certifications (RoHS Compliant vs. ROHS3 Compliant). Physical dimensions differ slightly (3FS-236: 35.56mm L × 31.00mm W × 25.40mm H; F36-030: 34.93mm L × 28.58mm W × 23.80mm H), remaining within acceptable PCB layout tolerances for through-hole applications. Current inventory availability is 931 units for F36-030 versus 786 units for 3FS-236.

F28-1300 (Triad Magnetics) - Non-Equivalent:

The F28-1300 does not qualify as a direct substitute. While it shares the same primary voltage (115V), core type (laminated), mounting method (through hole), termination style (PC pin), isolation voltage (2500Vrms), and dual secondary winding configuration, it deviates significantly in electrical output specifications. The F28-1300 is rated at 36VA with secondary voltages of 14V parallel and 28V series, and output currents of 2.6A parallel and 1.3A series. These parameters do not align with the 3FS-236 requirements and represent a different power class transformer unsuitable for direct substitution in applications designed for 1.1VA, 18V/36V, 60mA/30mA specifications.

Frequently Asked Questions (FAQ)

Q: Can the F36-030 be used as a direct replacement for the 3FS-236 in existing circuit designs?

A: Yes. The F36-030 maintains identical electrical specifications across all critical parameters: 115V primary input, 18V parallel and 36V series secondary outputs, 60mA parallel and 30mA series output currents, 1.1VA power rating, 2500Vrms isolation, laminated core construction, through-hole mounting, and PC pin termination. Physical dimensions are comparable and suitable for standard PCB through-hole layouts.

Q: Why is the F28-1300 listed as a substitute if it has different electrical specifications?

A: The F28-1300 is listed in the provided substitute data but does not meet the substitution criteria for the 3FS-236. It is included in this reference for completeness of the source data. The F28-1300 is not electrically compatible due to different secondary voltages (14V/28V vs. 18V/36V), output currents (2.6A/1.3A vs. 60mA/30mA), and power rating (36VA vs. 1.1VA).

Q: What are the key parameters that determine if a transformer can substitute for the 3FS-236?

A: Substitution requires exact matching of: primary voltage (115V), secondary voltage parallel configuration (18V), secondary voltage series configuration (36V), output current parallel rating (60mA), output current series rating (30mA), power rating (1.1VA), core type (laminated), mounting type (through hole), termination style (PC pin), isolation voltage (2500Vrms), and secondary winding configuration (dual).

Q: Are there physical dimension differences between the 3FS-236 and F36-030?

A: Yes. The 3FS-236 measures 35.56mm L × 31.00mm W × 25.40mm H, while the F36-030 measures 34.93mm L × 28.58mm W × 23.80mm H. These differences are minor and typically accommodated within standard through-hole PCB design tolerances.

Q: Do both the 3FS-236 and F36-030 meet current environmental compliance standards?

A: Yes. The 3FS-236 is RoHS Compliant, and the F36-030 is ROHS3 Compliant. Both meet current environmental regulations for restricted substances in electrical and electronic equipment.

Q: What is the difference in packaging between these transformers?

A: The 3FS-236 is supplied in tube packaging, while the F36-030 is supplied in box packaging. This affects handling and storage but does not impact electrical or mechanical compatibility in the application.