Bourns 6706 25µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 6706 is a 25µH shielded toroidal inductor rated for 9A continuous current with 12mOhm maximum DC resistance. This through-hole component features iron powder core construction and operates across the -55°C to 105°C temperature range. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing design support and procurement continuity.

Substiute Parts

6706

Bourns Inc.In Stock: 11316706 Datasheet

Current PartRFQ

PT25-1000

API Delevan Inc.In Stock: 963PT25-1000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 6706 is determined by the following critical parameters:

• Inductance Value: Must be 25µH 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 9A rating to support circuit requirements
• DC Resistance: Maximum 12mOhm to maintain thermal and efficiency specifications
• Test Frequency: 1 kHz measurement standard

The API Delevan PT25-1000 meets all substitution criteria with equivalent inductance, core material, shielding, and mounting configuration. The substitute provides enhanced current rating (10.4A vs 9A) and acceptable DC resistance (14mOhm vs 12mOhm maximum), maintaining functional compatibility within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 6706 is classified as obsolete. The API Delevan PT25-1000 provides functional equivalence for replacement applications.

Selection Basis:

• Both components are RoHS non-compliant and REACH unaffected, maintaining equivalent regulatory status
• The PT25-1000 carries active product status, ensuring ongoing availability and supply chain continuity
• Current rating differential (10.4A vs 9A) provides design margin without introducing incompatibility
• DC resistance variance (14mOhm vs 12mOhm) remains within acceptable operating parameters for toroidal inductor applications
• Identical inductance value, tolerance, core material, and shielding configuration ensure electrical performance equivalence
• Through-hole radial/vertical mounting preserves PCB layout compatibility

Frequently Asked Questions (FAQ)

Q: Can the PT25-1000 directly replace the Bourns 6706 in existing designs?

A: Yes. The PT25-1000 meets all critical electrical parameters: 25µH inductance at ±15% tolerance, iron powder core, shielded construction, and through-hole mounting. The higher current rating (10.4A) and slightly elevated DC resistance (14mOhm) do not compromise functional compatibility.

Q: What is the significance of the current rating difference?

A: The PT25-1000 is rated for 10.4A versus the 6706's 9A rating. This provides additional thermal margin and allows the substitute to handle higher current loads without saturation or excessive heating. For circuits designed to the original 9A specification, the substitute operates with increased safety margin.

Q: How does the DC resistance variance affect circuit performance?

A: The PT25-1000 maximum DCR of 14mOhm compared to the 6706's 12mOhm represents a 2mOhm increase. In typical inductor applications, this variance produces minimal impact on circuit efficiency and thermal performance. Verification through circuit simulation is recommended for applications with stringent power loss budgets.

Q: Are the physical dimensions compatible?

A: The PT25-1000 dimensions (1.000" Dia x 0.400" W) differ from the 6706 (1.125" L x 0.600" W). PCB layout verification is necessary to confirm mechanical fit within the available board space. The radial/vertical lead configuration remains compatible with standard through-hole mounting practices.

Q: What compliance certifications apply to both components?

A: Both the Bourns 6706 and API Delevan PT25-1000 are RoHS non-compliant and REACH unaffected. ECCN classification is EAR99 for both components, and HTSUS code 8504.50.4000 applies to both toroidal inductors.