6447-028 Laminated Power Transformer Equivalent & Substitute Parts

Part Overview

The 6447-028 is a 30VA laminated core power transformer manufactured by API Delevan Inc., designed for through-hole mounting applications. It features dual primary windings (115V, 230V) and dual secondary windings (parallel 14V or series 28V configuration), with a maximum output current of 2.12A in parallel mode or 1.06A in series mode.

The 6447-028 carries an obsolete product status. Locating substitute components with identical electrical and mechanical specifications is necessary for ongoing system support, maintenance, and new production requirements where legacy compatibility is required.

Substiute Parts

6447-028

API Delevan Inc.In Stock: 8406447-028 Datasheet

Current PartRFQ

6447R-028

API Delevan Inc.In Stock: 9816447R-028 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 6447-028 are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution criteria include:

Electrical Parameters (Must Match Exactly):

• Power rating: 30VA
• Primary voltage options: 115V, 230V
• Secondary voltage configurations: Parallel 14V, Series 28V
• Output current specifications: Parallel 2.12A, Series 1.06A
• Isolation voltage: 4000Vrms
• Winding configuration: Dual primary, dual secondary

Mechanical Parameters (Must Match Exactly):

• Core type: Laminated
• Mounting type: Through hole
• Termination style: PC pin
• Physical dimensions: 66.68mm L × 55.55mm W × 39.67mm H (max)
• Weight: 1.2 lbs (544.3 g)

The 6447R-028 meets all substitution criteria as a direct equivalent component manufactured by the same supplier (API Delevan Inc.) with identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 6447R-028 is a direct functional and mechanical equivalent to the 6447-028. Both components share identical electrical specifications, core construction, winding configuration, and physical form factor, ensuring pin-for-pin and footprint compatibility in through-hole PCB applications.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 6447-028 is classified as obsolete, while the 6447R-028 maintains active production status with API Delevan Inc. Additionally, the 6447R-028 achieves ROHS3 compliance, whereas the 6447-028 is non-compliant. Both components maintain REACH unaffected status and carry the same ECCN (EAR99) and HTSUS (8504.31.4035) classifications.

For new designs, maintenance applications, or production continuity where the 6447-028 is specified, the 6447R-028 provides equivalent electrical performance and mechanical compatibility with the added benefit of current manufacturing availability and improved environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can the 6447R-028 be used as a direct replacement for the 6447-028 in existing circuit designs?

A: Yes. The 6447R-028 is electrically and mechanically equivalent to the 6447-028. All primary and secondary voltage ratings, output current specifications, isolation voltage, core type, winding configuration, mounting type, termination style, and physical dimensions are identical. No circuit modifications or PCB redesign are required.

Q: What is the difference between the 6447-028 and 6447R-028 part numbers?

A: The primary differences are product status and compliance certification. The 6447-028 is obsolete and RoHS non-compliant. The 6447R-028 is an active production part with ROHS3 compliance. The "R" designation in the 6447R-028 part number indicates the revised, compliant version. Electrical and mechanical specifications are identical.

Q: Are there any inventory or lead time considerations when substituting the 6447R-028 for the 6447-028?

A: The 6447R-028 is currently in active production with 925 pieces available in stock, compared to 773 pieces of the obsolete 6447-028. The active status of the 6447R-028 ensures ongoing availability and shorter lead times for future orders.

Q: Does the 6447R-028 maintain the same through-hole mounting footprint as the 6447-028?

A: Yes. Both components have identical physical dimensions (66.68mm L × 55.55mm W × 39.67mm H maximum seated height) and use PC pin termination for through-hole mounting. No PCB layout modifications are necessary.

Q: Are the dual primary and dual secondary winding configurations identical between the two parts?

A: Yes. Both the 6447-028 and 6447R-028 feature dual primary windings (115V, 230V) and dual secondary windings (parallel 14V or series 28V). Output current ratings are identical: 2.12A maximum in parallel mode and 1.06A maximum in series mode.

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

A: Both the 6447-028 and 6447R-028 provide 4000Vrms isolation voltage, ensuring equivalent dielectric strength and safety performance in isolated power supply applications.