FD7-12 Equivalent & Substitute Parts Reference

Part Overview

The FD7-12 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 (12.6V). This chassis-mount transformer is designed for applications requiring isolated AC power conversion with flexible input voltage selection. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when inventory constraints, lead time requirements, or supply chain disruptions necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

FD7-12

Triad MagneticsIn Stock: 1016FD7-12 Datasheet

Current PartRFQ

DP-241-7-12

Signal TransformerIn Stock: 1062DP-241-7-12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD7-12 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Identical power rating: 56VA
• Matching primary voltage configuration: Dual winding 115V/230V
• Matching secondary voltage: 12.6V at full load
• Matching secondary current capacity: 4A maximum
• Identical center tap configuration: Present
• Matching isolation voltage: 2500VAC/Vrms

Mechanical Equivalence Requirements:

• Identical mounting type: Chassis Mount
• Compatible termination style: Solder and Quick Connect 0.187" (4.7mm)
• Acceptable dimensional variance: Within standard manufacturing tolerances for laminated core transformers
• Matching core type: Laminated

Compliance Equivalence Requirements:

• RoHS3 Compliant status maintained
• REACH Unaffected designation maintained
• Identical ECCN and HTSUS classifications

The DP-241-7-12 manufactured by Signal Transformer satisfies all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (FD7-12): The FD7-12 maintains Active product status with 981 units in current inventory. This part is RoHS3 compliant and REACH unaffected, meeting all regulatory requirements for industrial and commercial applications. Selection of the primary part is appropriate when supply availability is confirmed and lead times are acceptable.

Substitute Part Selection (DP-241-7-12): The DP-241-7-12 is classified as a direct electrical and mechanical equivalent with identical electrical specifications, core type, winding configuration, and compliance certifications. This part is manufactured by Signal Transformer under the Two-4-One™ series designation and maintains 1008 units in inventory. Dimensional variations (width: 49.20mm vs. 46.02mm; height: 57.80mm vs. 57.15mm) remain within standard manufacturing tolerances for laminated core transformers and do not affect functional compatibility in chassis-mount applications. The substitute part is suitable for direct replacement in applications where the FD7-12 is specified, provided mechanical mounting clearances accommodate the minor dimensional differences.

Compliance Basis: Both parts maintain identical regulatory classifications (RoHS3, REACH Unaffected, EAR99, HTSUS 8504.31.4065), ensuring substitution does not introduce compliance risks in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can the DP-241-7-12 be used as a direct replacement for the FD7-12 in existing designs?

A: Yes. The DP-241-7-12 is electrically and mechanically equivalent across all critical parameters: identical 56VA power rating, dual 115V/230V primary windings, 12.6V center-tapped secondary, 4A output current, laminated core construction, 2500VAC isolation voltage, and chassis-mount configuration. Dimensional tolerances (width and height variations of approximately 3mm and 0.65mm respectively) are within acceptable ranges for chassis-mount transformer applications and do not affect functional compatibility.

Q: Are there any compliance differences between FD7-12 and DP-241-7-12?

A: No. Both parts maintain identical compliance designations: RoHS3 Compliant, REACH Unaffected, ECCN EAR99, and HTSUS 8504.31.4065. Substitution introduces no regulatory or certification risks.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution eligibility is determined by: power rating (56VA), primary voltage configuration (115V/230V dual winding), secondary voltage (12.6V), secondary current capacity (4A), center tap presence, isolation voltage (2500VAC), and core type (laminated). The DP-241-7-12 matches all these parameters.

Q: Are the termination styles compatible between FD7-12 and DP-241-7-12?

A: Yes. Both parts feature Solder and Quick Connect termination with 0.187" (4.7mm) connector specifications, ensuring direct compatibility in wiring and connection applications.

Q: What dimensional considerations apply when substituting the DP-241-7-12 for the FD7-12?

A: The DP-241-7-12 has slightly larger width (49.20mm vs. 46.02mm) and height (57.80mm vs. 57.15mm) dimensions. These variations are within standard manufacturing tolerances for laminated core transformers. Verify that chassis mounting clearances and enclosure space accommodate these minor differences before installation.

Q: Do both parts have the same weight and physical characteristics?

A: Yes. Both parts weigh 1.7 lbs (771.1 g) and feature identical laminated core construction, dual primary windings, single center-tapped secondary winding, and chassis-mount configuration. Length dimensions are nearly identical (93.65mm vs. 93.70mm).

Q: What inventory status should influence part selection?

A: FD7-12 has 981 units in stock; DP-241-7-12 has 1008 units in stock. Both parts maintain adequate inventory levels. Selection should be based on lead time requirements, supply chain preferences, and design specifications rather than availability constraints.