FD7-24 Equivalent & Substitute Parts Reference

Part Overview

The FD7-24 is a laminated core power transformer manufactured by Triad Magnetics, rated at 56VA with dual primary windings (115V/230V) and a single center-tapped secondary winding (24V, 2.4A maximum output). This chassis-mount transformer is designed for applications requiring isolated AC power conversion with selectable primary voltage input. The part maintains Active product status with full RoHS3 compliance and 2500VAC isolation rating. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance are maintained across alternative manufacturers.

Substiute Parts

FD7-24

Triad MagneticsIn Stock: 1216FD7-24 Datasheet

Current PartRFQ

DP-241-7-24

Signal TransformerIn Stock: 1109DP-241-7-24 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD7-24 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Power rating: 56VA
• Primary voltage configuration: Dual winding supporting 115V and 230V
• Secondary voltage: 24V
• Secondary current capacity: 2.4A minimum
• Center tap presence: Required
• Isolation voltage: 2500VAC minimum

Mechanical Equivalence Requirements:

• Core type: Laminated
• Mounting configuration: Chassis mount
• Termination compatibility: Solder and Quick Connect terminals

Regulatory Equivalence Requirements:

• RoHS3 compliance
• REACH unaffected status
• ECCN classification: EAR99

The DP-241-7-24 from Signal Transformer satisfies all substitution criteria, maintaining identical electrical ratings, compatible mechanical dimensions within tolerance, and equivalent regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (FD7-24): The FD7-24 maintains Active product status with 1107 units in current inventory. This part is suitable for new designs and ongoing production requiring immediate availability and established supply chain relationships with Triad Magnetics.

Substitute Part Selection (DP-241-7-24): The DP-241-7-24 is qualified as a direct substitute based on complete electrical and mechanical equivalence. This part maintains Active product status with 1048 units in inventory. Selection of this substitute is appropriate when supply chain diversification is required, when Signal Transformer's Two-4-One™ series availability is preferred, or when alternative sourcing reduces procurement risk.

Compliance Basis: Both parts satisfy RoHS3 compliance requirements and maintain REACH unaffected status, supporting deployment in regulated markets. Both carry EAR99 classification under export control regulations. Isolation voltage specifications (2500VAC/2500Vrms) are equivalent and support the same application safety requirements.

Mechanical Compatibility: Dimensional variations between the two parts (width difference of 3.18mm, height difference of 0.65mm) remain within standard chassis mount tolerance ranges and do not affect interchangeability in standard mounting configurations. Termination styles are compatible across both Solder and Quick Connect connection methods.

Frequently Asked Questions (FAQ)

Q: Can the DP-241-7-24 be used as a direct replacement for the FD7-24 in existing designs?

A: Yes. The DP-241-7-24 is electrically and mechanically equivalent to the FD7-24. Both transformers provide identical 56VA power rating, dual 115V/230V primary windings, 24V center-tapped secondary output at 2.4A maximum current, and laminated core construction. Chassis mount configurations and termination styles are compatible. No circuit modifications are required.

Q: Are there any dimensional constraints when substituting the DP-241-7-24 for the FD7-24?

A: Dimensional differences are minimal and within standard tolerance ranges. The DP-241-7-24 is 3.18mm wider and 0.65mm taller than the FD7-24. These variations are typical for equivalent transformer designs from different manufacturers and do not affect standard chassis mount applications. Verify available mounting space in your specific enclosure design.

Q: Do both transformers support the same primary voltage selection?

A: Yes. Both the FD7-24 and DP-241-7-24 feature dual primary windings supporting 115V and 230V operation. Primary voltage selection is determined by winding configuration in your circuit design and is identical between both parts.

Q: What is the significance of the center tap in both transformers?

A: The center tap on the secondary winding allows the 24V output to be configured as either a single 24V supply or as dual 12V supplies (12V between center tap and each end of the secondary winding). This feature is present in both the FD7-24 and DP-241-7-24, providing identical functional flexibility.

Q: Are regulatory certifications equivalent between the two parts?

A: Yes. Both transformers maintain RoHS3 compliance, REACH unaffected status, and EAR99 export classification. Isolation voltage ratings are equivalent (2500VAC and 2500Vrms are equivalent specifications). Both parts satisfy the same regulatory requirements for deployment in controlled markets.

Q: What termination options are available on both transformers?

A: Both the FD7-24 and DP-241-7-24 support Solder and Quick Connect termination styles. The Quick Connect terminals on both parts are 0.187" (4.7mm) spade connectors, ensuring compatibility with standard connector systems. Terminal selection depends on your assembly process requirements.

Q: How do I determine which substitute part to select?

A: Selection between the FD7-24 and DP-241-7-24 is based on supply chain availability, inventory status, and sourcing preferences. Both parts are functionally equivalent. The FD7-24 offers 1107 units in stock (Triad Magnetics), while the DP-241-7-24 offers 1048 units in stock (Signal Transformer). Choose based on lead time requirements and preferred supplier relationships.