DST4-24B18 Equivalent & Substitute Parts

Part Overview

The DST4-24B18 is a laminated core power transformer manufactured by Pulse Electronics, rated at 6VA with dual primary and secondary windings. This through-hole mounted component operates at 115V or 230V primary voltage with configurable secondary output of 12V parallel or 24V series. The transformer is actively produced and RoHS compliant, making it suitable for industrial and commercial power supply applications requiring galvanic isolation and voltage conversion.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturers while preserving form factor and termination characteristics.

Substiute Parts

DST4-24B18

Pulse ElectronicsIn Stock: 1013DST4-24B18 Datasheet

Current PartRFQ

FS24-250

Triad MagneticsIn Stock: 1615FS24-250 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FS24-250 manufactured by Triad Magnetics qualifies as a direct substitute for the DST4-24B18 based on the following critical parameters:

• Identical power rating: 6VA
• Matching primary voltage configuration: 115V, 230V dual input
• Matching secondary voltage configuration: 12V parallel, 24V series
• Identical output current specifications: 500mA parallel, 250mA series
• Identical core type: Laminated
• Matching winding configuration: Dual primary, dual secondary, no center tap
• Identical mounting type: Through hole with PC pin termination
• Equivalent isolation voltage: 2500Vrms
• Compatible physical dimensions within manufacturing tolerance
• Equivalent regulatory compliance: RoHS and REACH unaffected status

Parameter Comparison

Engineering Selection Recommendations

Both the DST4-24B18 and FS24-250 are active production components with equivalent electrical and mechanical specifications. Selection between these parts should be based on:

Availability and lead time requirements. The FS24-250 currently maintains higher inventory levels (1532 pcs vs. 953 pcs), which may influence procurement timelines.

Regulatory compliance requirements. The FS24-250 carries RoHS3 certification, providing enhanced compliance documentation for applications requiring the latest RoHS iteration. The DST4-24B18 maintains RoHS compliance suitable for standard industrial applications.

Packaging format. The DST4-24B18 is supplied in standard packaging, while the FS24-250 is packaged in boxes, which may affect handling and storage procedures.

Manufacturer preference and supply chain strategy. Both components are from established transformer manufacturers with equivalent product reliability records.

Frequently Asked Questions (FAQ)

Q: Can the FS24-250 be used as a direct replacement for the DST4-24B18 in existing designs?

A: Yes. Both transformers share identical electrical specifications including power rating, voltage configuration, current capacity, and isolation voltage. Physical dimensions are equivalent within standard manufacturing tolerances. PC pin termination is identical, allowing direct PCB mounting compatibility.

Q: Are there any differences in performance between these two transformers?

A: No performance differences exist. Both transformers meet the same electrical requirements: 6VA power rating, dual primary windings supporting 115V or 230V input, dual secondary windings providing 12V at 500mA or 24V at 250mA, and 2500Vrms isolation voltage.

Q: What is the significance of the RoHS3 certification on the FS24-250?

A: RoHS3 represents the current iteration of the Restriction of Hazardous Substances directive. Both components are RoHS compliant. The FS24-250's RoHS3 designation indicates compliance with the latest regulatory requirements, which may be required for applications subject to current EU directives or equivalent standards.

Q: Do the physical dimension differences affect PCB layout?

A: The dimensional variations are minimal and within standard manufacturing tolerances. The DST4-24B18 measures 41.40mm L × 33.27mm W × 33.27mm H, while the FS24-250 measures 41.28mm L × 33.32mm W × 33.32mm H. These differences are negligible for standard through-hole PCB applications and do not require layout modifications.

Q: Which transformer should be selected for new designs?

A: Selection should be based on supply chain availability, inventory levels, and specific regulatory compliance documentation required by the application. Both transformers are equally suitable for new designs meeting the specified electrical and mechanical requirements.

Q: Are moisture sensitivity considerations different between these parts?

A: The DST4-24B18 carries MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. The FS24-250 lists MSL as Not Applicable, indicating equivalent or superior moisture tolerance. Both transformers are suitable for standard storage and handling conditions without special moisture control measures.