Equivalent & Substitute Parts: Tamura 3FS-556

Part Overview

The Tamura 3FS-556 is a laminated core power transformer rated at 12VA with a single primary winding (115V) and dual secondary windings (28V parallel / 56V series configuration). This through-hole mounted component is designed for PC pin termination and operates with 2500Vrms isolation. The part is Active in product status and RoHS Compliant, making it suitable for applications requiring regulated power distribution in industrial and commercial electronics.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturers while accommodating application-specific requirements such as inventory availability or packaging preferences.

Substiute Parts

3FS-556

TamuraIn Stock: 11223FS-556 Datasheet

Current PartRFQ

F56-220

Triad MagneticsIn Stock: 675F56-220 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Tamura 3FS-556 is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Identical power rating (12VA)
• Matching primary voltage (115V)
• Matching secondary voltage configuration (Parallel 28V, Series 56V)
• Isolation voltage rating (2500Vrms minimum)
• Dual secondary winding configuration
• Single primary winding configuration

Mechanical Compatibility Requirements:

• Through-hole mounting type
• PC pin termination style
• Laminated core construction

Regulatory Compliance:

• Active product status
• RoHS compliance or equivalent environmental certification

The Triad Magnetics F56-220 meets all electrical equivalence and mechanical compatibility criteria. While secondary output current ratings differ (F56-220 provides higher current capacity: 440mA parallel / 220mA series versus 3FS-556: 200mA parallel / 100mA series), this represents a superset capability that maintains full compatibility with applications designed for the 3FS-556 specifications.

Parameter Comparison

Engineering Selection Recommendations

Tamura 3FS-556 Selection Criteria:

• Primary choice when tube packaging is required for automated assembly processes
• Specified when exact current output limits of 200mA parallel / 100mA series are design constraints
• Preferred when Tamura component qualification is mandated by design documentation or supply chain agreements
• Active product status with RoHS Compliance ensures regulatory alignment for current production

Triad Magnetics F56-220 Selection Criteria:

• Suitable substitute when higher secondary current capacity (440mA parallel / 220mA series) provides design margin without circuit modification
• Box packaging accommodates manual assembly or stock management preferences
• ROHS3 Compliance meets equivalent environmental standards
• Active product status maintains supply chain continuity
• Electrical and mechanical parameters ensure direct functional replacement in through-hole PC pin applications

Both parts maintain identical electrical specifications for voltage transformation, isolation rating, and winding configuration. Selection between them depends on packaging requirements, current capacity margin needs, and manufacturer qualification status rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can the Triad Magnetics F56-220 directly replace the Tamura 3FS-556 in existing designs?

A: Yes. The F56-220 provides equivalent primary voltage (115V), secondary voltage configuration (28V parallel / 56V series), isolation rating (2500Vrms), core type (laminated), winding configuration (single primary, dual secondary), mounting type (through-hole), and termination style (PC pin). The higher secondary current capacity of the F56-220 does not create incompatibility with circuits designed for the 3FS-556 specifications.

Q: What is the significance of the different secondary current ratings?

A: The Tamura 3FS-556 is rated for 200mA parallel / 100mA series output current. The Triad Magnetics F56-220 is rated for 440mA parallel / 220mA series output current. Both transformers deliver the same voltage transformation and power rating (12VA). The F56-220 provides higher current capacity, which represents a superset of the 3FS-556 capability. Applications designed for the lower current ratings of the 3FS-556 operate within the F56-220 specifications without modification.

Q: How do packaging differences affect component selection?

A: The Tamura 3FS-556 is supplied in tube packaging, while the Triad Magnetics F56-220 is supplied in box packaging. Tube packaging is typically used for automated pick-and-place assembly systems. Box packaging is used for manual assembly or bulk storage. Packaging selection depends on manufacturing process requirements rather than electrical or mechanical performance.

Q: Are both parts RoHS compliant?

A: Yes. The Tamura 3FS-556 is RoHS Compliant. The Triad Magnetics F56-220 is ROHS3 Compliant. Both certifications meet current environmental and hazardous substance restrictions for electronic components.

Q: What isolation voltage rating applies to both transformers?

A: Both the Tamura 3FS-556 and Triad Magnetics F56-220 are rated for 2500Vrms isolation voltage, ensuring equivalent electrical safety and insulation performance between primary and secondary windings.

Q: Are there dimensional differences between these transformers?

A: Yes. The Tamura 3FS-556 measures 48.50mm L x 41.52mm W x 38.00mm H (seated). The Triad Magnetics F56-220 measures 47.63mm L x 39.67mm W x 36.50mm H (seated). These dimensional variations are minor and do not affect through-hole mounting compatibility on standard PCB layouts. Verify clearance in space-constrained applications.

Q: What is the product status of both parts?

A: Both the Tamura 3FS-556 and Triad Magnetics F56-220 are Active products, indicating current manufacturing and availability through authorized distributors.