Bourns 6717 500µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 6717 is a 500µH shielded toroidal inductor rated for 4A continuous current with 150mOhm 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 system support and procurement planning. Equivalent parts must maintain the same inductance value, core shielding characteristics, and mounting configuration while accommodating minor variations in current rating and DC resistance within acceptable design margins.

Substiute Parts

6717

Bourns Inc.In Stock: 9996717 Datasheet

Current PartRFQ

PT500-1750

API Delevan Inc.In Stock: 1246PT500-1750 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 6717 is determined by strict adherence to the following core parameters:

Critical Match Requirements:

• Inductance value: 500 µH (±15% tolerance band)
• Core type: Iron powder shielded construction
• Mounting configuration: Through-hole radial vertical orientation
• Test frequency: 1 kHz measurement standard

Allowable Variation Parameters:

• Current rating: May exceed 4A specification (substitute rated for 5A is acceptable)
• DC resistance: Substitute maximum of 160mOhm is within acceptable tolerance relative to 150mOhm specification
• Physical dimensions: Minor variations in diameter and width acceptable provided mounting footprint remains compatible with through-hole radial vertical configuration
• Operating temperature: Substitute with unspecified range remains compatible if application does not require the full -55°C to 105°C specification

The API Delevan PT500-1750 meets all critical match requirements and allowable variation parameters, qualifying as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan PT500-1750 qualifies as a direct substitute for the obsolete Bourns 6717 based on the following engineering criteria:

Functional Equivalence: Both components share identical inductance specifications (500µH ±15%), core material composition (iron powder), and shielding architecture. The 1kHz test frequency standard is maintained across both parts, ensuring measurement consistency.

Performance Margin: The PT500-1750 provides a 25% increase in current rating capacity (5A versus 4A), establishing a positive design margin for applications operating at or near the original 4A specification. The 10mOhm increase in maximum DC resistance (160mOhm versus 150mOhm) represents a 6.7% variance and remains within acceptable engineering tolerance for inductor substitution.

Compliance Alignment: Both components maintain identical RoHS non-compliance status, REACH unaffected classification, and EAR99 export control designation. This equivalence eliminates compliance reclassification requirements during component transition.

Product Status Consideration: The PT500-1750 maintains active product status with confirmed inventory availability (1149 units), providing supply chain continuity for the obsolete Bourns 6717.

Physical Compatibility: The radial vertical through-hole mounting configuration is preserved. Dimensional variations (1.750" diameter × 0.750" width for PT500-1750 versus 1.812" length × 0.900" width for 6717) require verification against specific PCB footprint constraints, though both components maintain compatible lead spacing for standard through-hole radial mounting.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan PT500-1750 be used as a direct replacement for the Bourns 6717 in existing designs?

A: Yes, provided the following conditions are met: (1) PCB footprint accommodates the PT500-1750 radial vertical mounting configuration; (2) application does not require the full -55°C to 105°C operating temperature range specified for the 6717; (3) the 10mOhm increase in DC resistance does not exceed circuit design tolerances; (4) the higher 5A current rating does not introduce thermal or electromagnetic compatibility issues in the application context.

Q: What are the critical parameters that must match between the Bourns 6717 and any substitute part?

A: Inductance value (500µH ±15%), core material (iron powder), shielding type (shielded), mounting configuration (through-hole radial vertical), and test frequency (1kHz) are non-negotiable. Variations in current rating, DC resistance, and physical dimensions are permissible within specified engineering tolerances.

Q: How does the 10mOhm difference in DC resistance affect circuit performance?

A: The PT500-1750 maximum DC resistance of 160mOhm represents a 6.7% increase relative to the 6717 specification of 150mOhm. This variance introduces proportionally higher resistive losses in the inductor. Circuit designs with tight power dissipation budgets or high-frequency switching applications should verify that this resistance increase remains acceptable for the intended application.

Q: Are there any compliance or regulatory differences between these two components?

A: No. Both components share identical RoHS non-compliance status, REACH unaffected classification, EAR99 export control designation, and HTSUS commodity code (8504.50.4000). No compliance reclassification is required when transitioning from the 6717 to the PT500-1750.

Q: What should be verified before implementing the PT500-1750 as a substitute?

A: Verify PCB footprint compatibility with the radial vertical mounting configuration, confirm that the application does not require the full -55°C to 105°C temperature range, and validate that circuit design tolerances accommodate the 10mOhm increase in DC resistance and the higher 5A current rating.