DST3-36B25 Equivalent & Substitute Parts

Part Overview

The DST3-36B25 is a laminated core power transformer manufactured by Pulse Electronics, designed for through-hole mounting applications. This 2.4VA transformer features dual primary and secondary windings, supporting input voltages of 115V or 230V with configurable output voltages of 18V (parallel) or 36V (series). The component is actively produced and maintains RoHS compliance, making it suitable for modern electronic equipment requiring isolated power conversion in compact form factors.

Equivalent and substitute parts become necessary when the primary manufacturer part experiences supply constraints, extended lead times, or when design flexibility permits component sourcing from alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

DST3-36B25

Pulse ElectronicsIn Stock: 945DST3-36B25 Datasheet

Current PartRFQ

162E36

Hammond ManufacturingIn Stock: 860162E36 Datasheet

DirectRFQ

DST-3-36

Signal TransformerIn Stock: 1390DST-3-36 Datasheet

DirectRFQ

3FD-336

TamuraIn Stock: 9953FD-336 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DST3-36B25 is determined by strict electrical and mechanical parameter matching across the following criteria:

Electrical Parameters (Mandatory Match):

• Power rating: 2.4VA
• Primary voltage options: 115V, 230V
• Secondary voltage configuration: Parallel 18V / Series 36V
• Output current capacity: Parallel 130mA / Series 65mA
• Winding configuration: Dual primary, dual secondary
• Isolation voltage: 2500Vrms
• Core type: Laminated

Mechanical Parameters (Mandatory Match):

• Mounting type: Through hole
• Termination style: PC pin
• Physical dimensions: Within acceptable tolerance ranges
• Height seated: Compatibility with PCB assembly requirements

Compliance Parameters:

• RoHS status: Compliant or ROHS3 compliant
• REACH status: Unaffected
• ECCN classification: EAR99

All substitute parts listed below satisfy these criteria without exception.

Parameter Comparison

Engineering Selection Recommendations

All four parts listed maintain active production status and comply with applicable environmental regulations (RoHS and REACH). Selection among these equivalents should be based on the following factors:

Direct Equivalents (162E36, DST-3-36): These parts demonstrate dimensional compatibility within standard PCB assembly tolerances. The Hammond 162E36 and Signal Transformer DST-3-36 are functionally and mechanically interchangeable with the DST3-36B25. Both maintain ROHS3 compliance and are currently in stock with adequate inventory levels.

Similar Equivalent (3FD-336): The Tamura 3FD-336 satisfies all electrical specifications and maintains RoHS compliance. Physical dimensions show minor variations in width (31.00mm vs. 28.70mm) and height (32.10mm vs. 30.23mm). These dimensional differences require verification against specific PCB layout constraints before selection.

Compliance Considerations: All parts carry EAR99 ECCN classification and REACH unaffected status, permitting unrestricted use in standard commercial applications. RoHS and ROHS3 compliance certifications are equivalent for component-level substitution purposes.

Frequently Asked Questions (FAQ)

Q: Can the 162E36 directly replace the DST3-36B25 in existing designs?

A: Yes. The Hammond 162E36 matches all electrical parameters (2.4VA, dual primary/secondary windings, 115V/230V input, 18V/36V output) and maintains compatible physical dimensions (34.93mm L × 28.58mm W × 30.15mm H). PC pin termination and through-hole mounting are identical.

Q: What are the dimensional constraints when selecting between these substitutes?

A: The DST3-36B25, 162E36, and DST-3-36 maintain consistent length (approximately 35mm) and width (approximately 28.6mm) dimensions. The 3FD-336 exhibits a 2.3mm width increase and 1.87mm height increase. PCB layout verification is required if space constraints are critical.

Q: Are there compliance differences between these parts?

A: The DST3-36B25 and 3FD-336 carry RoHS Compliant certification. The 162E36 and DST-3-36 carry ROHS3 Compliant certification. Both certifications satisfy RoHS directive requirements and are functionally equivalent for component selection.

Q: Which substitute offers the best inventory availability?

A: The Signal Transformer DST-3-36 maintains the highest inventory level at 1334 pieces. The Tamura 3FD-336 provides 971 pieces, and the Hammond 162E36 provides 755 pieces. The original DST3-36B25 maintains 857 pieces in stock.

Q: Can the 3FD-336 be used in space-constrained applications?

A: The 3FD-336 dimensions (35.56mm L × 31.00mm W × 32.10mm H) exceed the original part in width and height. Applications with strict spatial requirements should confirm PCB layout compatibility before substitution.

Q: Do all substitutes support both 115V and 230V primary inputs?

A: Yes. All listed parts support dual primary voltage configuration (115V or 230V) and dual secondary voltage configuration (18V parallel or 36V series), maintaining identical electrical flexibility.