DST-4-48 Equivalent & Substitute Parts

Part Overview

The DST-4-48 is a laminated core power transformer manufactured by Signal Transformer, rated at 6VA with dual primary and secondary windings. The device supports selectable output configurations: 24V parallel or 48V series, with corresponding maximum output currents of 250mA and 125mA respectively. This through-hole mounted transformer is designed for applications requiring isolated AC power conversion with 2500Vrms isolation voltage. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications are maintained across alternative manufacturers.

Substiute Parts

DST-4-48

Signal TransformerIn Stock: 951DST-4-48 Datasheet

Current PartRFQ

FS48-125

Triad MagneticsIn Stock: 723FS48-125 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DST-4-48 is determined by strict equivalence across the following parameters:

• Power rating: 6VA
• Primary voltage options: 115V and 230V dual configuration
• Secondary voltage outputs: 24V (parallel) and 48V (series)
• Maximum output currents: 250mA (parallel) and 125mA (series)
• Core construction: Laminated
• Mounting method: Through hole
• Termination style: PC pin
• Isolation voltage: 2500Vrms
• Compliance: ROHS3 compliant

The FS48-125 manufactured by Triad Magnetics meets all specified electrical and mechanical parameters within the dimensional tolerances provided.

Parameter Comparison

Engineering Selection Recommendations

Both the DST-4-48 and FS48-125 are active production components with identical electrical specifications and mechanical compatibility. Selection between these parts may be based on:

• Availability: DST-4-48 has 881 units in stock; FS48-125 has 672 units in stock
• Packaging format: DST-4-48 supplied in bulk; FS48-125 supplied in box
• Manufacturer preference: Signal Transformer versus Triad Magnetics
• Compliance requirements: Both meet ROHS3 and REACH standards

Dimensional variance is negligible (±0.02mm across all axes), confirming mechanical interchangeability in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can FS48-125 replace DST-4-48 in existing designs?

A: Yes. The FS48-125 meets all electrical and mechanical specifications of the DST-4-48. Dimensional differences are within ±0.02mm, confirming PCB footprint compatibility for through-hole mounting.

Q: Are there differences in output current capacity between these parts?

A: No. Both parts deliver identical maximum output currents: 250mA in parallel configuration and 125mA in series configuration at their respective voltage outputs.

Q: Do both parts support the same primary voltage inputs?

A: Yes. Both DST-4-48 and FS48-125 accept 115V or 230V primary inputs with dual winding configuration.

Q: What is the significance of the packaging difference?

A: DST-4-48 is supplied in bulk packaging, while FS48-125 is supplied in box packaging. This affects handling and storage but does not impact electrical or mechanical performance.

Q: Are isolation voltage ratings identical?

A: Yes. Both parts provide 2500Vrms isolation voltage between primary and secondary windings.

Q: Do both parts comply with environmental regulations?

A: Yes. Both DST-4-48 and FS48-125 are ROHS3 compliant and REACH unaffected.