DST4-56B34 Equivalent & Substitute Parts

Part Overview

The DST4-56B34 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 28V (parallel) or 56V (series). The part maintains Active product status with full RoHS compliance and 2500Vrms isolation rating, making it suitable for industrial and commercial electronic equipment requiring galvanic isolation and voltage transformation.

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

DST4-56B34

Pulse ElectronicsIn Stock: 993DST4-56B34 Datasheet

Current PartRFQ

3FD-456

TamuraIn Stock: 8663FD-456 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DST4-56B34 are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or remain within acceptable tolerances for functional substitution:

• Power rating: 6VA
• Primary voltage configuration: 115V, 230V dual input
• Secondary voltage outputs: 28V (parallel) and 56V (series)
• Output current capacity: 220mA (parallel) and 110mA (series)
• Core construction: Laminated
• Winding configuration: Dual primary and dual secondary
• Mounting method: Through hole with PC pin termination
• Isolation voltage: 2500Vrms minimum
• Regulatory compliance: RoHS compliant

The Tamura 3FD-456 meets all electrical specifications and maintains identical functional parameters. Physical dimensions show minor variations within acceptable manufacturing tolerances for through-hole mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the DST4-56B34 and 3FD-456 are Active products with full RoHS compliance and identical electrical specifications. Selection between these parts should be based on:

• Availability and lead time requirements
• PCB layout constraints, as the 3FD-456 has a maximum seated height of 38.00mm compared to 33.27mm for the DST4-56B34
• Packaging preference: DST4-56B34 is available in standard packaging, while 3FD-456 is supplied in tube packaging
• Inventory status and procurement cost

Both parts satisfy the same electrical and isolation requirements for applications requiring 6VA laminated core transformers with dual voltage inputs and configurable secondary outputs.

Frequently Asked Questions (FAQ)

Q: Can the 3FD-456 be used as a direct replacement for the DST4-56B34?

A: Yes, the 3FD-456 provides electrical equivalence with identical power rating, voltage configurations, current capacity, and isolation specifications. Physical dimensions differ slightly; verify PCB layout clearance, particularly the maximum seated height of 38.00mm for the 3FD-456.

Q: What are the critical parameters for transformer substitution?

A: For this product category, substitution requires matching: power rating (6VA), primary voltage inputs (115V/230V), secondary voltage outputs (28V parallel, 56V series), output current capacity (220mA parallel, 110mA series), core type (laminated), winding configuration (dual primary and secondary), mounting method (through hole), and isolation voltage (2500Vrms).

Q: Are there differences in packaging between these parts?

A: The DST4-56B34 uses standard packaging, while the 3FD-456 is supplied in tube packaging. This affects handling, storage, and automated assembly processes but does not impact electrical performance.

Q: Do both parts meet the same compliance standards?

A: Yes, both the DST4-56B34 and 3FD-456 are RoHS compliant with EAR99 ECCN classification and identical HTSUS codes (8504.31.4035).

Q: What is the significance of the 2500Vrms isolation rating?

A: The 2500Vrms isolation voltage specifies the maximum voltage that can be safely applied between primary and secondary windings without electrical breakdown. Both parts maintain this specification, ensuring equivalent safety and performance in isolation applications.