ST-6-48 Equivalent & Substitute Parts

Part Overview

The ST-6-48 is a laminated core power transformer manufactured by Signal Transformer, rated at 20VA with dual secondary windings capable of parallel (24V, 800mA) or series (48V, 400mA) output configurations. The primary winding operates at 115V single-phase input. This through-hole mounted component is designed for PC pin termination and maintains 2500Vrms isolation voltage. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Equivalent substitute parts are identified to provide procurement flexibility and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

ST-6-48

Signal TransformerIn Stock: 910ST-6-48 Datasheet

Current PartRFQ

F48-400

Triad MagneticsIn Stock: 1168F48-400 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The F48-400 manufactured by Triad Magnetics qualifies as a direct substitute for the ST-6-48 based on strict electrical and mechanical parameter equivalence. Substitution is valid when the following criteria are met:

• Identical power rating: 20VA
• Identical primary voltage: 115V single-phase
• Identical secondary voltage configurations: Parallel 24V/800mA and Series 48V/400mA
• Identical core type: Laminated
• Identical winding configuration: Single primary, dual secondary
• Identical mounting and termination: Through hole with PC pin termination
• Identical isolation voltage: 2500Vrms
• Equivalent physical dimensions within manufacturing tolerance
• Matching regulatory compliance: ROHS3 compliant, REACH unaffected

The F48-400 maintains dimensional compatibility with maximum variance of 0.05mm in length, 0.03mm in width, and 0.40mm in height, all within acceptable PCB assembly tolerances.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-6-48 and F48-400 are active production components with identical regulatory compliance profiles. Selection between these parts is based on procurement availability and supply chain requirements rather than technical performance differentiation. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent environmental and regulatory requirements. The F48-400 is available in box packaging with higher inventory levels (1102 units), while the ST-6-48 is supplied in bulk packaging with 840 units in stock. For applications requiring immediate substitution or where the primary part is unavailable, the F48-400 provides direct functional and mechanical equivalence without design modification.

Frequently Asked Questions (FAQ)

Q: Can the F48-400 be used as a direct replacement for the ST-6-48 in existing designs?

A: Yes. The F48-400 is electrically and mechanically equivalent to the ST-6-48. All electrical parameters, winding configurations, isolation voltage, and physical dimensions are identical or within manufacturing tolerance. No circuit modifications are required.

Q: Are there any dimensional differences that could affect PCB assembly?

A: Dimensional differences are minimal and within standard PCB assembly tolerances. The F48-400 is 0.05mm shorter in length, 0.03mm wider, and 0.40mm shorter in height compared to the ST-6-48. These variations do not impact through-hole mounting or component placement.

Q: Do both parts support the same voltage configurations?

A: Yes. Both the ST-6-48 and F48-400 support identical dual secondary winding configurations: parallel connection at 24V/800mA or series connection at 48V/400mA from a 115V primary input.

Q: What is the difference between bulk and box packaging?

A: Bulk packaging (ST-6-48) and box packaging (F48-400) represent different distribution formats. Box packaging typically provides individual component protection and is suitable for smaller order quantities, while bulk packaging is optimized for larger volume procurement. Electrical and mechanical specifications remain identical.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the ST-6-48 and F48-400 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.