FD5-16 Equivalent & Substitute Parts Reference

Part Overview

The FD5-16 is a laminated core power transformer manufactured by Triad Magnetics, rated at 12VA with dual primary windings (115V/230V) and a single 16V secondary winding with center tap. This chassis mount transformer is designed for applications requiring isolated AC power conversion with a maximum output current of 800mA. The part is currently active in production with ROHS3 compliance and 2500VAC isolation rating.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits functional alternatives that maintain electrical and mechanical compatibility within specified tolerances.

Substiute Parts

FD5-16

Triad MagneticsIn Stock: 937FD5-16 Datasheet

Current PartRFQ

DP-241-5-16

Signal TransformerIn Stock: 1578DP-241-5-16 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD5-16 is determined by strict equivalence across the following parameters:

Electrical Equivalence Requirements:

• Power rating of 12VA
• Dual primary winding supporting both 115V and 230V input
• Secondary voltage output of 16V
• Maximum secondary current capacity of 800mA or greater
• Single secondary winding with center tap configuration
• Isolation voltage rating of 2500VAC or higher

Mechanical Equivalence Requirements:

• Chassis mount form factor
• Termination style compatible with solder and quick connect terminals (0.187" / 4.7mm)
• Physical dimensions within acceptable tolerance for PCB or chassis integration

Compliance Requirements:

• ROHS3 compliance status
• Active product status in manufacturer's current catalog

The DP-241-5-16 manufactured by Signal Transformer meets all critical electrical and mechanical parameters specified above, establishing it as a direct functional equivalent to the FD5-16.

Parameter Comparison

Engineering Selection Recommendations

FD5-16 (Triad Magnetics):

• Current inventory: 865 pieces
• Series designation: Quick Pack
• Recommended for applications where Triad Magnetics supply chain is established or preferred
• ROHS3 compliant and EAR99 classified

DP-241-5-16 (Signal Transformer):

• Current inventory: 1535 pieces
• Series designation: Two-4-One™
• Recommended for applications where Signal Transformer supply chain is established or where higher inventory availability is required
• ROHS3 compliant and EAR99 classified
• Dimensions: 71.40mm L x 36.30mm W x 42.80mm H (seated)

Both parts are active products with identical electrical specifications and compliance certifications. Selection between FD5-16 and DP-241-5-16 should be based on supplier availability, lead time requirements, and established procurement relationships. Physical dimensions show minor variations (approximately 1.4mm width and 1.52mm height difference), which are negligible for most chassis mount applications but should be verified against specific PCB or enclosure constraints.

Frequently Asked Questions (FAQ)

Q: Can the DP-241-5-16 be used as a direct replacement for the FD5-16 in existing designs?

A: Yes. Both transformers share identical electrical specifications: 12VA power rating, dual 115V/230V primary, 16V secondary with center tap, 800mA maximum output current, and 2500VAC isolation. Both use chassis mount configuration with compatible solder and quick connect termination. Physical dimensions differ by less than 2mm in width and height, which is typically acceptable for chassis mount applications. Verify mounting hole alignment and clearance in your specific enclosure design.

Q: What are the critical parameters that must match for substitution?

A: The following parameters must be identical: power rating (12VA), primary voltage configuration (115V/230V dual), secondary voltage (16V), secondary current capacity (800mA), winding configuration (dual primary, single secondary with center tap), core type (laminated), and mounting type (chassis mount). Isolation voltage must be 2500VAC or higher. Termination style must support solder and quick connect terminals.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the FD5-16 and DP-241-5-16 are ROHS3 compliant, classified as EAR99, and assigned the same HTSUS code (8504.31.4035). Both are active products in their respective manufacturers' current catalogs.

Q: What should I verify before substituting these parts?

A: Verify the following: (1) PCB or chassis mounting hole spacing and alignment, (2) available clearance height (FD5-16: 41.28mm max vs. DP-241-5-16: 42.80mm max), (3) available clearance width (FD5-16: 34.93mm vs. DP-241-5-16: 36.30mm), (4) termination point accessibility for solder or quick connect attachment, (5) thermal management requirements in your application.

Q: Which part should I select based on availability?

A: The DP-241-5-16 currently has higher inventory (1535 pieces vs. 865 pieces for FD5-16). If lead time is a critical factor, the DP-241-5-16 may provide faster procurement. If you have an established relationship with Triad Magnetics or prefer their Quick Pack series, the FD5-16 remains a viable option with adequate stock levels.

Q: Are the physical dimensions close enough that I don't need to verify them?

A: Physical dimensions should always be verified against your specific design constraints. While the differences are minor (approximately 1.4mm width and 1.52mm height), they may be significant in space-constrained applications. Measure available clearance in your enclosure or PCB layout before finalizing the substitution.