DP-241-4-28 Equivalent & Substitute Parts

Part Overview

The DP-241-4-28 is a laminated core power transformer manufactured by Signal Transformer, rated at 6VA with dual primary windings (115V/230V) and a single center-tapped secondary winding (28V, 200mA output). This chassis-mount transformer is designed for applications requiring isolated AC power conversion with flexible input voltage selection. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in the target application.

Substiute Parts

DP-241-4-28

Signal TransformerIn Stock: 936DP-241-4-28 Datasheet

Current PartRFQ

FD4-28

Triad MagneticsIn Stock: 917FD4-28 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The FD4-28 manufactured by Triad Magnetics qualifies as a direct substitute for the DP-241-4-28 based on the following electrical and mechanical equivalence criteria:

Electrical Equivalence:

• Identical power rating (6VA)
• Matching primary voltage configuration (115V/230V dual)
• Identical secondary voltage (28V)
• Matching output current specification (200mA maximum)
• Identical secondary winding configuration (single with center tap)
• Equivalent isolation voltage (2500VAC vs. 2500Vrms)
• Identical core type (laminated)

Mechanical Compatibility:

• Same mounting type (chassis mount)
• Compatible termination styles (both feature solder and quick connect options)
• Similar physical dimensions and weight (0.44 lb for both)
• Equivalent regulatory compliance (ROHS3, REACH unaffected, EAR99)

Parameter Comparison

Engineering Selection Recommendations

Both the DP-241-4-28 and FD4-28 are active production parts with identical electrical specifications and equivalent mechanical form factors. Selection between these parts should be based on:

Availability and Lead Time: The FD4-28 currently has 865 units in stock compared to 836 units for the DP-241-4-28, providing equivalent supply assurance.

Packaging Consideration: The DP-241-4-28 is supplied in bulk packaging, while the FD4-28 is supplied in box packaging. Packaging selection depends on procurement volume and handling requirements.

Regulatory Compliance: Both parts meet identical compliance requirements (ROHS3, REACH unaffected, EAR99 classification), ensuring no regulatory constraints on substitution.

Physical Dimensions: Minor dimensional variations exist (DP-241-4-28: 60.30mm L × 33.30mm W × 36.20mm H; FD4-28: 65.07mm L × 31.75mm W × 34.93mm H). Verify chassis cutout and mounting clearances in the target application before final selection.

Frequently Asked Questions (FAQ)

Q: Can the FD4-28 directly replace the DP-241-4-28 in existing designs?

A: Yes. Both transformers meet identical electrical specifications (6VA, 115V/230V primary, 28V secondary, 200mA output, center-tapped configuration) and share equivalent isolation voltage, core type, and mounting method. Physical dimensions differ slightly; verify mounting clearances in your specific application.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99. Regulatory requirements do not constrain substitution.

Q: What is the significance of the center tap on the secondary winding?

A: The center tap allows the secondary winding to be used in three configurations: full 28V output, or split into two 14V outputs with the center tap as reference. Both the DP-241-4-28 and FD4-28 provide this functionality identically.

Q: How do the termination styles differ between these parts?

A: Both parts offer solder and quick connect termination options. The FD4-28 specifies quick connect as 0.187" (4.7mm) connectors. Verify connector compatibility with your PCB or wiring harness design.

Q: What are the primary reasons to consider a substitute part?

A: Substitute parts are selected based on supply availability, lead time, packaging format, or minor dimensional preferences when electrical specifications and compliance requirements are identical. Both parts are currently active; selection depends on procurement logistics and physical fit within your application.