FD7-48 Equivalent & Substitute Parts Reference

Part Overview

The FD7-48 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 (48V, 1.2A maximum output). This chassis-mount transformer is designed for applications requiring isolated AC power conversion with selectable primary voltage input. The part is currently active in production with full RoHS3 compliance and 2500VAC isolation rating. Substitute parts are identified when inventory constraints, lead time requirements, or packaging preferences necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

FD7-48

Triad MagneticsIn Stock: 976FD7-48 Datasheet

Current PartRFQ

DP-241-7-48

Signal TransformerIn Stock: 1199DP-241-7-48 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD7-48 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Power rating: 56VA (exact match)
• Primary voltage configuration: Dual 115V/230V (exact match)
• Secondary voltage: 48V (exact match)
• Secondary current capacity: 1.2A minimum (exact match)
• Center tap presence: Required (exact match)
• Core type: Laminated (exact match)
• Isolation voltage: 2500VAC minimum (exact match)

Mechanical Equivalence Requirements:

• Mounting type: Chassis Mount (exact match)
• Termination style: Solder and Quick Connect compatible (exact match)
• Physical dimensions: Within tolerance for chassis integration
• Weight: Consistent with core and winding design

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status required
• ECCN EAR99 classification maintained

The DP-241-7-48 from Signal Transformer meets all electrical, mechanical, and compliance criteria for direct substitution with the FD7-48.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (FD7-48): The FD7-48 from Triad Magnetics is the specified component with 902 units in current inventory. This part maintains active production status with full RoHS3 compliance and REACH unaffected designation. Selection of the primary part is appropriate when standard lead times and box packaging are acceptable.

Substitute Part Selection (DP-241-7-48): The DP-241-7-48 from Signal Transformer is a direct electrical and mechanical equivalent with 1099 units available in bulk packaging. This substitute is appropriate when bulk packaging reduces cost, when inventory availability of the primary part is constrained, or when lead time optimization is required. The substitute maintains identical electrical performance, isolation voltage rating, and compliance certifications. Dimensional variations (width +3.18mm, height +0.65mm) remain within acceptable tolerance for standard chassis-mount applications and do not affect electrical performance or safety characteristics.

Both parts are classified as active products with current manufacturing support and identical compliance profiles (RoHS3, REACH unaffected, EAR99).

Frequently Asked Questions (FAQ)

Q: Can the DP-241-7-48 be used as a direct replacement for the FD7-48 in existing designs?

A: Yes. The DP-241-7-48 is electrically and mechanically equivalent to the FD7-48. All critical electrical parameters (56VA, 115V/230V primary, 48V secondary, 1.2A output, center tap, 2500VAC isolation) are identical. Chassis-mount configuration and termination compatibility are maintained. Dimensional variations are within tolerance for standard mounting applications.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Triad Magnetics vs. Signal Transformer), packaging format (box vs. bulk), inventory availability, and minor dimensional variations. The DP-241-7-48 is 3.18mm wider and 0.65mm taller than the FD7-48. These dimensional differences do not affect electrical performance or standard chassis integration.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the FD7-48 and DP-241-7-48 are RoHS3 compliant and REACH unaffected. Both carry EAR99 export classification.

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

A: The center tap on the secondary winding allows the 48V output to be configured as either a single 48V supply or as dual ±24V supplies. This feature is present on both the FD7-48 and DP-241-7-48.

Q: Can these transformers be used with either 115V or 230V primary input?

A: Yes. Both transformers feature dual primary windings that support 115V or 230V input selection. The secondary output remains 48V regardless of primary voltage selection.

Q: What is the maximum continuous output current?

A: Both transformers are rated for 1.2A maximum output current at full load on the secondary winding.

Q: Are there any packaging considerations when switching between these parts?

A: The FD7-48 is supplied in box packaging, while the DP-241-7-48 is supplied in bulk packaging. Bulk packaging may require additional handling procedures for component protection and inventory management.