Equivalent & Substitute Parts for Tamura 3FS-248

Part Overview

The Tamura 3FS-248 is a laminated core power transformer rated at 1.1VA with a single primary winding (115V) and dual secondary windings (24V parallel / 48V series configuration). This through-hole mounted component is designed for Class 2/3 applications requiring galvanic isolation at 2500Vrms. The part is currently in active production status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

3FS-248

TamuraIn Stock: 11253FS-248 Datasheet

Current PartRFQ

F48-023

Triad MagneticsIn Stock: 1174F48-023 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Tamura 3FS-248 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match exactly:

Electrical Parameters (Non-Negotiable):

• Power rating: 1.1VA
• Primary voltage: 115V
• Secondary voltage configuration: Parallel 24V and Series 48V dual output
• Maximum output current: Parallel 46mA and Series 23mA
• Isolation voltage: 2500Vrms
• Winding configuration: Single primary, dual secondary, no center tap

Mechanical Parameters (Non-Negotiable):

• Core type: Laminated
• Mounting: Through hole
• Termination: PC pin

Compliance Parameters:

• RoHS compliance status (either RoHS or ROHS3 acceptable)
• ECCN and HTSUS classification alignment

The Triad Magnetics F48-023 meets all substitution criteria and is classified as an equivalent part for the 3FS-248.

Parameter Comparison

Engineering Selection Recommendations

Tamura 3FS-248 Selection Criteria:

• Primary choice when tube packaging is required for automated assembly or specific handling requirements
• RoHS compliant status suitable for all regulated markets
• Active production status ensures long-term availability
• Current inventory: 1072 pieces

Triad Magnetics F48-023 Selection Criteria:

• Functionally equivalent substitute with identical electrical specifications
• ROHS3 compliance provides enhanced regulatory coverage
• Slightly smaller physical footprint (approximately 2-3% reduction in length and width dimensions)
• Box packaging suitable for manual assembly or kit-based applications
• Current inventory: 1090 pieces
• REACH unaffected status provides additional supply chain assurance

Both parts share identical electrical performance, isolation voltage, and winding configuration. Selection between these two transformers should be based on packaging requirements, physical space constraints, and supply chain preferences. Both maintain active production status and full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the Triad Magnetics F48-023 be used as a direct replacement for the Tamura 3FS-248 in existing designs?

A: Yes. The F48-023 is electrically and functionally equivalent. All critical parameters including power rating, voltage configuration, current output, isolation voltage, and winding topology are identical. Physical dimensions are similar with minor variations (approximately 2-3% smaller). Through-hole PC pin termination is identical, allowing direct PCB mounting compatibility.

Q: What are the key differences between these two transformers?

A: The primary differences are manufacturer identity, packaging format (tube versus box), and minor physical dimensions. The Tamura 3FS-248 is packaged in tubes; the Triad Magnetics F48-023 is packaged in boxes. The F48-023 is approximately 0.6mm shorter in length and 2.4mm narrower in width. All electrical specifications are identical.

Q: Are there any compliance or regulatory differences?

A: Both parts are RoHS compliant. The Tamura 3FS-248 carries RoHS certification; the Triad Magnetics F48-023 carries ROHS3 certification. Both share identical ECCN (EAR99) and HTSUS (8504.31.4035) classifications. The F48-023 includes REACH unaffected status documentation.

Q: Which transformer should be selected for new designs?

A: Selection should be based on packaging preference and supply chain strategy. For automated assembly requiring tube packaging, select the Tamura 3FS-248. For manual assembly or kit-based applications, the Triad Magnetics F48-023 with box packaging may be preferred. Both are active production parts with stable inventory levels.

Q: Are the physical dimension differences significant for PCB layout?

A: The dimension differences are minor (0.6mm length reduction, 2.4mm width reduction, 1.6mm height reduction). These variations are unlikely to impact PCB layout in most applications. However, designs with tight spatial constraints should verify clearance before substitution.

Q: What is the moisture sensitivity level for these transformers?

A: The Tamura 3FS-248 has MSL 1 (unlimited). The Triad Magnetics F48-023 lists MSL as not applicable. Both transformers are suitable for standard storage and handling without special moisture control requirements.