DST4-48B30 Equivalent & Substitute Parts

Part Overview

The DST4-48B30 is a laminated core power transformer manufactured by Pulse Electronics, rated at 6VA with dual primary and secondary windings. This through-hole mounted component is designed for applications requiring switchable voltage configurations through series/parallel winding arrangements. The part is active in production with full RoHS compliance and 2500Vrms isolation rating. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

DST4-48B30

Pulse ElectronicsIn Stock: 1209DST4-48B30 Datasheet

Current PartRFQ

3FD-448

TamuraIn Stock: 9663FD-448 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The DST4-48B30 has one identified equivalent substitute: the 3FD-448 manufactured by Tamura. Substitution eligibility is determined by the following critical parameters:

• Identical power rating (6VA)
• Matching primary voltage inputs (115V, 230V)
• Matching secondary voltage outputs in both parallel (24V) and series (48V) configurations
• Identical output current specifications (250mA parallel, 125mA series)
• Dual primary and dual secondary winding architecture
• Laminated core construction
• Through-hole mounting with PC pin termination
• Equivalent isolation voltage (2500Vrms)
• Matching regulatory compliance (RoHS compliant, EAR99 classification)

The 3FD-448 meets all electrical and mechanical substitution criteria for the DST4-48B30 within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

Both the DST4-48B30 and 3FD-448 are active production components with identical electrical specifications and regulatory compliance profiles. Selection between these parts should be based on:

• Availability and lead time requirements
• Packaging format preference (DST4-48B30 supplied in standard packaging; 3FD-448 supplied in tube packaging)
• Physical dimensions tolerance requirements (DST4-48B30: 41.40mm L × 33.27mm W × 33.27mm H; 3FD-448: 41.50mm L × 34.83mm W × 38.00mm H)
• Supply chain and procurement logistics
• Cost considerations

Both parts maintain full RoHS compliance and equivalent isolation performance for applications requiring dual-voltage transformer functionality.

Frequently Asked Questions (FAQ)

Q: Can the 3FD-448 directly replace the DST4-48B30 in existing designs?

A: Yes, provided that the physical dimensions of the 3FD-448 (41.50mm L × 34.83mm W × 38.00mm H) are compatible with the PCB layout and enclosure constraints of the original design. The electrical specifications are identical.

Q: Are there differences in winding configuration between these parts?

A: No. Both parts feature dual primary windings and dual secondary windings with identical voltage and current ratings in series and parallel configurations.

Q: What is the significance of the series/parallel voltage capability?

A: The dual winding architecture allows the secondary to be configured as either 24V at 250mA (parallel connection) or 48V at 125mA (series connection), providing design flexibility for different application voltage requirements.

Q: Do both parts meet the same isolation and safety standards?

A: Yes. Both the DST4-48B30 and 3FD-448 are rated at 2500Vrms isolation voltage and carry identical RoHS compliance and EAR99 export classification.

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

A: The DST4-48B30 is supplied in standard packaging, while the 3FD-448 is supplied in tube packaging. This affects handling, storage, and automated assembly considerations.

Q: Are there any weight or material differences?

A: The DST4-48B30 is specified at 0.44 lb (199.58 g). Weight data for the 3FD-448 is not provided in the available specifications.