FD6-20 Equivalent & Substitute Parts Reference

Part Overview

The FD6-20 is a 30VA laminated core power transformer manufactured by Triad Magnetics, designed for chassis mount applications. This transformer features dual primary windings (115V/230V selectable) and a single secondary winding with center tap, delivering 20V at 1.5A maximum output current. The part is Active status and ROHS3 compliant, making it suitable for industrial and commercial electronic equipment requiring isolated power conversion.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while preserving core functionality in the target application.

Substiute Parts

FD6-20

Triad MagneticsIn Stock: 731FD6-20 Datasheet

Current PartRFQ

DP-241-6-20

Signal TransformerIn Stock: 927DP-241-6-20 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The FD6-20 has one identified equivalent substitute: DP-241-6-20 manufactured by Signal Transformer.

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Electrical Performance: Identical primary voltage configuration (115V/230V dual), secondary voltage (20V), output current rating (1.5A), and power capacity (30VA)
• Functional Features: Center tap secondary winding present in both designs
• Isolation Rating: Both parts maintain 2500V isolation specification
• Core Type: Both utilize laminated core construction
• Mounting & Termination: Chassis mount configuration with solder and quick connect termination compatibility
• Regulatory Compliance: Both ROHS3 compliant with matching ECCN and HTSUS classifications
• Product Status: Both parts are Active status with current manufacturing support

The DP-241-6-20 operates within the allowed mechanical tolerances (dimensional variance within manufacturing standards) and maintains functional equivalence for direct circuit substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: FD6-20 (Triad Magnetics) is the specified component with 668 units in current stock inventory.

Substitute Selection Criteria: DP-241-6-20 (Signal Transformer) is electrically and mechanically equivalent and may be selected when:

• FD6-20 availability is constrained or discontinued
• Supply chain requirements necessitate alternative sourcing
• Both parts maintain identical regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification)
• Both parts are Active status with ongoing manufacturer support
• Mechanical dimensions fall within standard PCB and chassis mount tolerances (maximum variance 0.6mm length, 1.45mm width, 0.6mm height)

No additional testing or qualification is required when substituting between these parts, as electrical performance, isolation rating, and functional specifications are identical. Both transformers are suitable for direct circuit replacement in applications requiring 30VA power conversion with 115V/230V primary input and 20V secondary output.

Frequently Asked Questions (FAQ)

Q: Can DP-241-6-20 be used as a direct replacement for FD6-20 in existing designs?

A: Yes. The DP-241-6-20 is electrically and mechanically equivalent to the FD6-20. Both transformers provide identical primary voltage configuration (115V/230V), secondary voltage (20V), output current (1.5A), power rating (30VA), isolation voltage (2500V), and termination style. Dimensional tolerances are within standard manufacturing specifications for chassis mount applications.

Q: Are there any compliance differences between FD6-20 and DP-241-6-20?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both share the same HTSUS tariff code (8504.31.4035). Regulatory compliance is identical.

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

A: The center tap on the secondary winding enables dual voltage output configurations. With the center tap, the transformer can provide either the full 20V output or split outputs of 10V from center tap to either end. Both FD6-20 and DP-241-6-20 include this feature.

Q: How do the physical dimensions compare between these parts?

A: FD6-20 dimensions are 82.55mm L x 42.85mm W x 49.20mm H (seated). DP-241-6-20 dimensions are 82.60mm L x 44.30mm W x 49.80mm H (seated). Variance is 0.05mm in length, 1.45mm in width, and 0.6mm in height. These differences are within standard manufacturing tolerances for chassis mount transformers and do not affect PCB or chassis integration.

Q: What termination options are available on both parts?

A: Both FD6-20 and DP-241-6-20 feature dual termination options: solder terminals and quick connect terminals (0.187" / 4.7mm). This allows flexibility in connection method depending on application requirements.

Q: Are both parts currently in production?

A: Yes. Both FD6-20 and DP-241-6-20 are Active status parts with current manufacturer support. FD6-20 has 668 units in stock; DP-241-6-20 has 884 units in stock.

Q: What is the isolation voltage rating and why is it important?

A: Both transformers provide 2500VAC (2500Vrms) isolation between primary and secondary windings. This isolation rating ensures electrical safety and is critical for applications requiring galvanic isolation between input and output circuits, particularly in industrial and medical equipment.