Bourns 4668-RC Fixed Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 4668-RC is a 3.9 mH unshielded drum core wirewound inductor rated for 160 mA with a maximum DC resistance of 20 Ohm, designed for through-hole axial mounting. This component operates across a temperature range of -55°C to 105°C and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning.

Substiute Parts

4668-RC

Bourns Inc.In Stock: 8174668-RC Datasheet

Current PartRFQ

2474R-44J

API Delevan Inc.In Stock: 8912474R-44J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4668-RC is determined by the following critical parameters:

• Inductance Value: Must match 3.9 mH at 1 kHz test frequency with ±5% tolerance
• Mounting Configuration: Must support through-hole axial mounting
• Current Rating: Must accommodate minimum 160 mA operation
• DC Resistance: Lower or equal DCR values are acceptable; higher values may impact circuit performance
• Shielding Classification: Unshielded configuration maintained
• Compliance Standards: RoHS3 compliance and REACH unaffected status required

The API Delevan 2474R-44J meets these substitution criteria with equivalent inductance and improved electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 2474R-44J is a direct functional substitute for the obsolete Bourns 4668-RC. Both components maintain identical inductance values and tolerance specifications at the 1 kHz test frequency. The 2474R-44J provides enhanced performance characteristics: 25% higher current rating capacity (200 mA versus 160 mA), significantly reduced DC resistance (8.63 Ohm versus 20 Ohm maximum), and an extended upper operating temperature limit (125°C versus 105°C).

Both parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in active production status with confirmed inventory availability, eliminating supply chain risk associated with the obsolete 4668-RC.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 2474R-44J directly replace the Bourns 4668-RC in existing designs?

A: Yes. Both inductors provide 3.9 mH inductance with ±5% tolerance at 1 kHz. The substitute part maintains through-hole axial mounting compatibility and unshielded configuration. The lower DC resistance of the 2474R-44J reduces power dissipation in the circuit.

Q: What is the significance of the different core materials (Iron vs. Ferrite)?

A: The Bourns 4668-RC uses an iron drum core, while the API Delevan 2474R-44J uses a ferrite core. Both materials support the specified inductance value and frequency characteristics. Ferrite cores typically provide better high-frequency performance and lower core losses.

Q: Does the higher current rating of the substitute part affect circuit compatibility?

A: No. A higher current rating indicates the substitute part can safely handle greater current levels without saturation. For applications requiring 160 mA operation, the 200 mA rating of the 2474R-44J provides additional design margin.

Q: Are there packaging differences between these parts?

A: The Bourns 4668-RC is supplied in standard packaging, while the API Delevan 2474R-44J is supplied in Tape & Reel (TR) format. Both maintain identical through-hole axial package and case specifications for PCB mounting.

Q: What compliance certifications apply to both parts?

A: Both the Bourns 4668-RC and API Delevan 2474R-44J are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.