DST4-28B22 Equivalent & Substitute Parts

Part Overview

The DST4-28B22 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 115V or 230V primary input with configurable secondary output of 14V parallel or 28V series. The part is currently active in production with RoHS compliance and 2500Vrms isolation rating. Substitute parts are identified to provide alternative sourcing options when the primary manufacturer part is unavailable or when inventory requirements necessitate alternative suppliers.

Substiute Parts

DST4-28B22

Pulse ElectronicsIn Stock: 766DST4-28B22 Datasheet

Current PartRFQ

FS28-200

Triad MagneticsIn Stock: 913FS28-200 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FS28-200 manufactured by Triad Magnetics qualifies as a direct substitute for the DST4-28B22 based on the following critical parameters:

• Identical power rating: 6VA
• Matching primary voltage configuration: 115V, 230V dual primary
• Matching secondary voltage outputs: 14V parallel, 28V series
• Matching secondary current capacity: 400mA parallel, 200mA 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
• Comparable physical dimensions and weight within acceptable tolerance

Both parts are active products with current production status and full RoHS compliance, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Both the DST4-28B22 and FS28-200 are suitable for direct substitution in applications requiring 6VA laminated core transformers with dual primary and secondary winding configurations. Selection between these parts should be based on:

• Supplier availability and lead time requirements
• Inventory levels at authorized distributors
• Compliance certifications: Both parts meet RoHS requirements; the FS28-200 carries ROHS3 certification while the DST4-28B22 carries standard RoHS compliance
• Physical dimensions: Dimensional variance is minimal (within 0.12mm length and 0.05mm width), presenting no functional impact for standard through-hole PCB mounting applications
• Series designation: DST4-28B22 belongs to the Split Bobbin Plug-In series; FS28-200 belongs to the Split Pack™ series

Both parts maintain identical electrical performance specifications and isolation ratings, ensuring equivalent circuit behavior.

Frequently Asked Questions (FAQ)

Q: Can the FS28-200 be used as a direct replacement for the DST4-28B22 in existing designs?

A: Yes. The FS28-200 matches all critical electrical parameters including power rating, voltage configurations, current capacity, winding configuration, and isolation voltage. Physical dimensions are within acceptable tolerance for through-hole PCB mounting.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS compliant and REACH unaffected. The FS28-200 carries ROHS3 certification while the DST4-28B22 carries standard RoHS compliance. Both meet the regulatory requirements for their respective product lines.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching: power rating (6VA), primary voltage configuration (115V/230V dual), secondary voltage outputs (14V parallel, 28V series), secondary current capacity (400mA parallel, 200mA series), winding configuration (dual primary and secondary), core type (laminated), mounting type (through hole), termination style (PC pin), and isolation voltage (2500Vrms).

Q: Are there dimensional considerations for PCB layout?

A: Dimensional differences are minimal. The FS28-200 measures 41.28mm L x 33.32mm W compared to the DST4-28B22 at 41.40mm L x 33.27mm W. These variations are within standard manufacturing tolerances and do not impact standard through-hole PCB footprint compatibility.

Q: Which part should be selected for new designs?

A: Selection should be based on supplier availability, inventory levels, and lead time requirements. Both parts are active products with equivalent electrical and mechanical specifications. No technical preference exists between them.