Equivalent & Substitute Parts: F4-20 Laminated Power Transformer

Part Overview

The Triad Magnetics F4-20 is a laminated core power transformer rated for 6VA with a 115V primary and 20V secondary output. This chassis mount transformer features a center tap configuration and is designed for applications requiring isolated AC power conversion with a maximum output current of 300mA. The part is actively manufactured and maintained in production inventory, with ROHS3 compliance and REACH unaffected status. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to support procurement flexibility and supply chain continuity.

Substiute Parts

F4-20

Triad MagneticsIn Stock: 749F4-20 Datasheet

Current PartRFQ

241-4-20

Signal TransformerIn Stock: 916241-4-20 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F4-20 is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Primary voltage (115V), secondary voltage (20V), power rating (6VA), maximum output current (300mA), and isolation voltage (2500VAC/Vrms) must match exactly.

Winding Configuration: Single primary winding, single secondary winding, and center tap presence must be identical.

Mechanical Compatibility: Mounting type (chassis mount) and termination style (solder and quick connect) must be compatible with the application footprint.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status ensure substitutes meet the same environmental and safety standards.

The Signal Transformer 241-4-20 meets all substitution criteria and is classified as a direct equivalent based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the F4-20 and 241-4-20 are actively manufactured and carry identical regulatory certifications (ROHS3 compliant, REACH unaffected). Selection between these parts should be based on:

Availability: The 241-4-20 maintains 822 units in stock compared to 721 units for the F4-20, providing additional supply assurance.

Packaging: The F4-20 is supplied in bulk packaging, while the 241-4-20 is supplied in box packaging. Procurement requirements may favor one format over the other.

Dimensional Tolerance: Physical dimensions vary slightly (F4-20: 60.33mm L × 31.75mm W × 34.93mm H; 241-4-20: 60.30mm L × 33.30mm W × 36.20mm H). Verify mechanical fit within the application enclosure before final selection.

Termination Compatibility: Both parts feature solder and quick connect termination. The F4-20 specifies 0.187" (4.7mm) quick connect sizing; confirm compatibility with existing harnesses.

Frequently Asked Questions (FAQ)

Q: Can the 241-4-20 directly replace the F4-20 in an existing design?

A: Yes, the 241-4-20 is electrically equivalent to the F4-20 across all critical parameters: 6VA power rating, 115V primary, 20V secondary, 300mA maximum output current, center tap configuration, and 2500VAC isolation voltage. Mechanical fit must be verified due to minor dimensional differences.

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

A: The primary differences are manufacturer (Triad Magnetics vs. Signal Transformer), series designation (Quick Pack vs. Two-4-One™), packaging format (bulk vs. box), and minor dimensional variations. Electrical performance and regulatory compliance are identical.

Q: Are both parts RoHS3 compliant?

A: Yes, both the F4-20 and 241-4-20 are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations.

Q: Does the center tap configuration differ between these parts?

A: No, both transformers include a center tap on the secondary winding, enabling split-rail power supply configurations or center-referenced output applications.

Q: What is the isolation voltage rating for both parts?

A: Both transformers provide 2500VAC (or 2500Vrms) isolation voltage between primary and secondary windings, suitable for safety-critical applications requiring galvanic isolation.

Q: Can I use either part interchangeably in production?

A: Electrical and regulatory specifications are interchangeable. Verify mechanical fit, termination connector compatibility, and packaging requirements for your specific production environment before implementing a substitution.