API Delevan 6446-028 Equivalent & Substitute Parts

Part Overview

The API Delevan 6446-028 is a laminated core power transformer rated for 20VA with dual primary and secondary windings. This through-hole mounted component provides selectable output configurations of 14V parallel or 28V series, supporting input voltages of 115V or 230V. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

6446-028

API Delevan Inc.In Stock: 12136446-028 Datasheet

Current PartRFQ

6446R-028

API Delevan Inc.In Stock: 7836446R-028 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 6446-028 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Power rating: 20VA
• Primary voltage configuration: Dual winding supporting 115V and 230V
• Secondary voltage outputs: Parallel 14V and Series 28V
• Output current capacity: Parallel 1.44A and Series 720mA
• Isolation voltage: 4000Vrms
• Core type: Laminated

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Termination style: PC Pin
• Physical envelope: 57.15mm L × 47.63mm W × 36.50mm H maximum

The API Delevan 6446R-028 meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 6446R-028 is the direct substitute for the obsolete 6446-028. Both components are manufactured by API Delevan Inc. and share identical electrical specifications and mechanical form factors. The primary distinction is product lifecycle status: the 6446-028 is obsolete while the 6446R-028 is active production.

For new designs and ongoing system support, the 6446R-028 is the appropriate selection. This part maintains full functional equivalence while offering the advantage of active manufacturer support and current availability. Additionally, the 6446R-028 achieves ROHS3 compliance, whereas the original 6446-028 is RoHS non-compliant, providing environmental and regulatory alignment for applications subject to RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can the 6446R-028 be used as a direct replacement for the 6446-028 in existing assemblies?

A: Yes. The 6446R-028 provides identical electrical performance and mechanical compatibility. No circuit modifications or PCB layout changes are required. Pin-for-pin compatibility is maintained through identical PC pin termination and through-hole mounting configuration.

Q: What is the difference between the 6446-028 and 6446R-028?

A: The components are electrically and mechanically identical. The primary differences are product status (obsolete versus active) and RoHS compliance (non-compliant versus ROHS3 compliant). The "R" designation in the 6446R-028 indicates the revised, active production version.

Q: Are there any voltage or current derating considerations when substituting the 6446R-028?

A: No. Both parts maintain identical voltage and current specifications: 115V/230V primary input, 14V/28V secondary output, 1.44A parallel current, and 720mA series current. No derating is necessary.

Q: Does the 6446R-028 fit the same PCB footprint as the 6446-028?

A: Yes. Physical dimensions are identical: 57.15mm length, 47.63mm width, and 36.50mm seated height. Through-hole mounting and PC pin termination are unchanged, ensuring direct mechanical compatibility.

Q: What is the isolation voltage rating for both parts?

A: Both the 6446-028 and 6446R-028 provide 4000Vrms isolation voltage between primary and secondary windings.