DST5-28B23 Equivalent & Substitute Parts

Part Overview

The DST5-28B23 is a laminated core power transformer manufactured by Pulse Electronics, rated at 12VA with dual primary and secondary windings. This through-hole mounted component is designed for applications requiring 115V or 230V primary input with configurable secondary output of 14V (parallel) or 28V (series). The part is currently active in production with 849 units in stock inventory.

Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements permit functional alternatives.

Substiute Parts

DST5-28B23

Pulse ElectronicsIn Stock: 919DST5-28B23 Datasheet

Current PartRFQ

FS28-420

Triad MagneticsIn Stock: 1483FS28-420 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FS28-420 manufactured by Triad Magnetics qualifies as a direct substitute for the DST5-28B23 based on the following critical parameters:

• Identical power rating: 12VA
• Matching primary voltage options: 115V, 230V
• Identical secondary voltage configuration: 14V (parallel), 28V (series)
• Matching output current specifications: 840mA (parallel), 420mA (series)
• Identical winding configuration: Dual primary, dual secondary
• Matching core type: Laminated
• Identical mounting and termination: Through hole with PC pin termination
• Equivalent isolation voltage: 2500Vrms
• Mechanical dimensions within acceptable tolerance for through-hole PCB mounting

Both parts are active products with RoHS compliance and REACH unaffected status, confirming regulatory alignment for current manufacturing standards.

Parameter Comparison

Engineering Selection Recommendations

Both the DST5-28B23 and FS28-420 are active production components with full regulatory compliance. The FS28-420 carries ROHS3 certification, representing the current RoHS standard, while the DST5-28B23 maintains RoHS compliance. Both parts are REACH unaffected and classified under identical HTSUS and ECCN codes.

Mechanical dimensions are equivalent within manufacturing tolerance, with maximum variation of 0.39mm in length and 0.05mm in width. Height variation is negligible at 0.08mm. These dimensional differences do not impact through-hole PCB mounting compatibility.

Selection between these parts should be based on supply availability, lead time requirements, and procurement cost. Both parts satisfy identical electrical and mechanical specifications for applications requiring 12VA laminated core transformers with dual winding configuration and 2500Vrms isolation.

Frequently Asked Questions (FAQ)

Q: Can FS28-420 be used as a direct replacement for DST5-28B23 in existing designs?

A: Yes. Both parts share identical electrical specifications including power rating, voltage ratings, current ratings, winding configuration, and isolation voltage. Mechanical dimensions are equivalent within standard manufacturing tolerance for through-hole mounting.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS compliant and REACH unaffected. The FS28-420 carries ROHS3 certification, which represents the current RoHS standard. Both meet current regulatory requirements for electronic component manufacturing.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by matching power rating (12VA), primary voltage options (115V/230V), secondary voltage configuration (14V parallel, 28V series), output current specifications (840mA parallel, 420mA series), winding configuration (dual primary and secondary), core type (laminated), mounting type (through hole), termination style (PC pin), and isolation voltage (2500Vrms).

Q: Do the dimensional differences affect PCB layout?

A: No. Dimensional variations are less than 0.4mm across all axes and fall within standard manufacturing tolerance for through-hole components. PCB footprints designed for either part will accommodate both without modification.

Q: Which part should be selected for new designs?

A: Selection should be based on supply chain availability, lead time, and cost. Both parts are functionally equivalent and meet current manufacturing standards. Verify current inventory and delivery schedules with your component supplier.