API Delevan 6443-020 Equivalent & Substitute Parts

Part Overview

The API Delevan 6443-020 is a laminated core power transformer rated at 2.5VA with through-hole mounting and dual primary and secondary windings. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The transformer provides selectable output configurations through parallel (10V, 240mA) or series (20V, 120mA) winding connections, with 4000Vrms isolation between primary and secondary circuits.

Substiute Parts

6443-020

API Delevan Inc.In Stock: 10406443-020 Datasheet

Current PartRFQ

6443R-020

API Delevan Inc.In Stock: 7836443R-020 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 6443-020 is determined by strict equivalence across the following critical parameters:

• Power rating: 2.5VA
• Primary voltage options: 115V, 230V
• Secondary voltage configurations: Parallel 10V / Series 20V
• Output current capacity: Parallel 240mA / Series 120mA
• Winding configuration: Dual primary, dual secondary
• Mounting interface: Through hole with PC pin termination
• Physical envelope: 34.93mm L x 28.58mm W x 30.15mm H (seated)
• Isolation voltage: 4000Vrms
• Core type: Laminated

The 6443R-020 meets all these criteria and qualifies as a direct substitute. The primary distinction between the original and substitute part is product status and regulatory compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The 6443R-020 is the direct substitute for the obsolete 6443-020. Both parts are electrically and mechanically identical across all functional parameters. The 6443R-020 carries active product status and ROHS3 compliance certification, making it the appropriate selection for new designs and ongoing production support where regulatory compliance is required. The original 6443-020 remains suitable for legacy system maintenance only where RoHS non-compliance is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can the 6443R-020 be used as a direct replacement for the 6443-020 in existing designs?

A: Yes. The 6443R-020 is electrically and mechanically equivalent. All voltage ratings, current capacities, winding configurations, mounting interfaces, and physical dimensions are identical. No circuit modifications or PCB layout changes are required.

Q: What is the difference between the 6443-020 and 6443R-020?

A: The parts are functionally identical. The 6443R-020 is the active production variant with ROHS3 compliance certification. The 6443-020 is obsolete and RoHS non-compliant. The "R" designation in the part number indicates the revised, compliant version.

Q: Are there any compatibility concerns with through-hole mounting and PC pin termination?

A: No. Both parts use identical through-hole mounting and PC pin termination. PCB footprints and assembly processes remain unchanged.

Q: What output configurations are available with these transformers?

A: The dual secondary winding allows two connection modes: parallel configuration (10V, 240mA) or series configuration (20V, 120mA). The dual primary winding supports 115V or 230V input selection.

Q: Is the 4000Vrms isolation voltage maintained in both parts?

A: Yes. Both the 6443-020 and 6443R-020 provide 4000Vrms isolation between primary and secondary circuits.