6706-RC Equivalent & Substitute Parts

Part Overview

The Bourns 6706-RC is a 25 µH shielded toroidal inductor rated for 9 A continuous current with 12 mOhm maximum DC resistance. This through-hole component features iron powder core construction and is designed for radial, vertical mounting with 4 open leads. The 6706-RC is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

6706-RC

Bourns Inc.In Stock: 9016706-RC Datasheet

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5706-RC

Bourns Inc.In Stock: 9375706-RC Datasheet

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PT25-1000

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

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Key Parameters

Substitute Part Grouping Explanation

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

• Inductance Value: Must be 25 µH (±15% tolerance)
• Current Rating: Must support minimum 9 A continuous current
• DC Resistance: Must not exceed 12 mOhm maximum
• Core Material: Iron powder construction
• Mounting Type: Through hole, radial vertical orientation
• Shielding Requirement: Shielded configuration preferred for EMI-sensitive applications

Two substitute parts meet these criteria with specific trade-offs documented below.

Parameter Comparison

Engineering Selection Recommendations

5706-RC (Bourns Inc.): This substitute maintains identical electrical specifications (25 µH, 9 A, 12 mOhm DCR) and full temperature range operation. The primary difference is unshielded construction, which reduces EMI containment. This part is active and ROHS3 compliant, making it suitable for applications where shielding is not critical. Mechanical dimensions differ slightly (1.125" Dia x 0.562" W vs. 1.125" L x 0.600" W), requiring PCB layout verification.

PT25-1000 (API Delevan Inc.): This substitute provides higher current capacity (10.4 A vs. 9 A) and maintains shielded construction. DC resistance is 14 mOhm maximum, exceeding the 12 mOhm specification by 2 mOhm. Operating temperature range is not specified. This part is active but RoHS non-compliant, limiting use in regulated applications. Smaller physical dimensions (1.000" Dia x 0.400" W) may offer space advantages.

Frequently Asked Questions (FAQ)

Q: Can the 5706-RC replace the 6706-RC in all applications?

A: The 5706-RC is electrically equivalent for inductance, current rating, and DC resistance. The key difference is unshielded versus shielded construction. In applications requiring EMI suppression or operating in electromagnetically noisy environments, the unshielded design may not provide adequate performance. PCB layout verification is required due to dimensional differences.

Q: Is the PT25-1000 a direct replacement?

A: The PT25-1000 meets the core electrical requirements (25 µH inductance, exceeds 9 A current rating, shielded). However, DC resistance is 14 mOhm maximum versus the 12 mOhm specification, representing a 16.7% increase in resistance. This affects power dissipation and thermal performance. RoHS non-compliance may restrict use in regulated industries. Operating temperature range is not documented.

Q: What are the critical parameters for substitution?

A: Inductance value (25 µH ±15%), current rating (minimum 9 A), DC resistance (maximum 12 mOhm), core material (iron powder), and mounting configuration (through-hole, radial vertical) are the primary substitution criteria. Shielding and compliance certifications are secondary considerations dependent on application requirements.

Q: How do dimensional differences affect PCB compatibility?

A: The 6706-RC measures 1.125" L x 0.600" W (28.58mm x 14.27mm). The 5706-RC is 1.125" Dia x 0.562" W (28.58mm x 14.27mm), and the PT25-1000 is 1.000" Dia x 0.400" W (25.40mm x 10.16mm). Footprint verification against PCB design files is mandatory before substitution to ensure lead alignment and clearance.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For EMI-sensitive circuits with RoHS compliance mandates, the 5706-RC is preferred despite unshielded construction. For applications tolerating slightly higher DC resistance without RoHS requirements, the PT25-1000 offers higher current capacity and smaller footprint. Thermal and compliance analysis specific to the target application is required.