Bourns 6728 50µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 6728 is a 50µH shielded toroidal inductor rated for 2.5A continuous current with 60mOhm maximum DC resistance. This through-hole component features an iron powder core and operates across the temperature range of -55°C to 105°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

6728

Bourns Inc.In Stock: 20366728 Datasheet

Current PartRFQ

PT50-780

API Delevan Inc.In Stock: 995PT50-780 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 6728 is determined by the following critical parameters:

• Inductance Value: Must be 50µH with ±15% tolerance
• Core Type: Iron powder construction required for equivalent magnetic characteristics
• Shielding: Shielded configuration mandatory
• Mounting: Through-hole radial/vertical orientation
• Current Capacity: Minimum 2.5A rating
• DC Resistance: Maximum 60mOhm specification
• Test Frequency: 1 kHz measurement standard

The API Delevan PT50-780 meets all substitution criteria. It maintains the same inductance value, tolerance, core material, shielding, and mounting configuration. The PT50-780 provides superior current handling (3.8A versus 2.5A) and lower DC resistance (50mOhm versus 60mOhm), making it a direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan PT50-780 is the qualified substitute for the obsolete Bourns 6728. Selection is based on the following factors:

• Product Status: The PT50-780 maintains active production status, ensuring long-term availability and supply chain continuity.
• Electrical Equivalence: Both inductors share identical inductance values, tolerance specifications, and core materials. The PT50-780 exceeds the current rating requirement (3.8A versus 2.5A) and provides improved DC resistance performance (50mOhm versus 60mOhm).
• Regulatory Compliance: Both parts carry identical REACH and ECCN classifications, maintaining compliance posture in regulated applications.
• Physical Compatibility: Radial, vertical through-hole mounting configuration is preserved, supporting direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan PT50-780 directly replace the Bourns 6728 in existing designs?

A: Yes. The PT50-780 maintains identical inductance value, tolerance, core material, shielding, and through-hole mounting configuration. The higher current rating and lower DC resistance represent performance improvements over the original specification.

Q: What are the key differences between these two inductors?

A: The primary differences are manufacturer origin and product status. The PT50-780 is in active production, whereas the Bourns 6728 is obsolete. The PT50-780 provides superior electrical performance with 3.8A current capacity (versus 2.5A) and 50mOhm maximum DC resistance (versus 60mOhm).

Q: Are there any compliance or certification differences?

A: No. Both inductors share identical REACH, ECCN, and HTSUS classifications. Both are RoHS non-compliant.

Q: Does the PT50-780 fit the same PCB footprint?

A: Both inductors use radial, vertical through-hole mounting with open lead configuration. Physical dimensions differ slightly (PT50-780: 0.780" diameter × 0.360" width versus Bourns 6728: 0.750" length × 0.425" width), but both are compatible with standard through-hole PCB layouts designed for toroidal inductors in this size class.

Q: What inductance test frequency applies to both parts?

A: Both inductors are specified at 1 kHz inductance test frequency, ensuring measurement consistency across substitution.