API Delevan 6443-028 Equivalent & Substitute Parts

Part Overview

The API Delevan 6443-028 is a laminated core power transformer rated at 2.5VA with dual primary and secondary windings, designed for through-hole mounting applications. This component features selectable voltage configurations (115V or 230V primary input) with parallel or series secondary output options (14V parallel or 28V series). The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

6443-028

API Delevan Inc.In Stock: 6716443-028 Datasheet

Current PartRFQ

6443R-028

API Delevan Inc.In Stock: 10916443R-028 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 6443-028 is determined by strict equivalence across the following critical parameters:

• Power Rating: Must be 2.5VA
• Voltage Configuration: Primary inputs of 115V and 230V with dual winding capability
• Secondary Output: Dual secondary windings capable of 14V parallel and 28V series configurations
• Current Capacity: Parallel output minimum 180mA; series output minimum 90mA
• Core Technology: Laminated core construction
• Winding Configuration: Dual primary and dual secondary windings
• Mounting and Termination: Through-hole mounting with PC pin termination
• Isolation Rating: 4000Vrms minimum
• Physical Envelope: Compatible with 34.93mm L × 28.58mm W footprint and 30.15mm maximum height

The API Delevan 6443R-028 meets all substitution criteria as a direct functional equivalent with identical electrical specifications and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 6443R-028 is the direct substitute for the obsolete 6443-028. Both components are manufactured by API Delevan Inc. and share identical electrical and mechanical specifications across all critical parameters including power rating, voltage configurations, current capacity, core type, winding configuration, mounting style, and physical dimensions.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 6443-028 is classified as obsolete and does not meet RoHS3 requirements. The 6443R-028 is an active product with ROHS3 compliance certification, making it the appropriate selection for new designs and applications requiring current regulatory adherence. Both components maintain equivalent isolation voltage ratings (4000Vrms) and are suitable for through-hole PCB assembly with PC pin termination.

Frequently Asked Questions (FAQ)

Q: Can the 6443R-028 be used as a direct replacement for the 6443-028 in existing designs?

A: Yes. The 6443R-028 provides complete functional equivalence with identical electrical specifications (2.5VA power rating, dual 115V/230V primary inputs, dual 14V parallel/28V series secondary outputs, 180mA parallel and 90mA series current capacity) and mechanical compatibility (through-hole mounting, PC pin termination, identical physical dimensions and isolation voltage).

Q: What is the difference between these two part numbers?

A: The 6443R-028 is the active production equivalent of the obsolete 6443-028. Both share identical transformer specifications. The 6443R-028 additionally carries ROHS3 compliance certification, whereas the 6443-028 is RoHS non-compliant. The "R" designation in the part number indicates the revised, compliant version.

Q: Are there any physical or mounting differences between these parts?

A: No. Both components have identical dimensions (34.93mm L × 28.58mm W × 30.15mm maximum height), use through-hole mounting, and employ PC pin termination. They are mechanically interchangeable on PCB layouts designed for the 6443-028.

Q: What voltage configurations are available with these transformers?

A: Both transformers feature dual primary windings supporting 115V or 230V input selection and dual secondary windings providing 14V in parallel configuration or 28V in series configuration. Maximum output current is 180mA in parallel mode and 90mA in series mode.

Q: Is the isolation voltage rating the same for both parts?

A: Yes. Both the 6443-028 and 6443R-028 provide 4000Vrms isolation voltage rating, meeting the same electrical safety requirements.