68 µH Unshielded Wirewound Inductor 2.3 A SMD (74458168)

Part Overview

The Würth Elektronik 74458168 is a 68 µH unshielded drum core wirewound inductor rated for 2.3 A continuous current with a maximum DC resistance of 130 mOhm. This component is designed for surface mount applications in nonstandard package configurations and is currently active in production. Equivalent and substitute parts are necessary to address supply chain flexibility, inventory availability, and design optimization across multiple sourcing channels.

Substiute Parts

74458168

Würth ElektronikIn Stock: 106474458168 Datasheet

Current PartRFQ

P0250.683NLT

Pulse ElectronicsIn Stock: 2802P0250.683NLT Datasheet

DirectRFQ

P0250.683NL

Pulse ElectronicsIn Stock: 3041P0250.683NL Datasheet

MFR RecommendedRFQ

SDR1806-680ML

Bourns Inc.In Stock: 3610SDR1806-680ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74458168 is determined by the following critical parameters:

• Inductance Value: 68 µH (exact match required)
• Current Rating: Minimum 2.3 A continuous current capability
• DC Resistance: 130 mOhm maximum
• Shielding Configuration: Unshielded
• Mounting Type: Surface Mount
• Operating Temperature Range: Minimum -40°C ~ 125°C coverage
• Compliance: ROHS3 compliant, REACH unaffected

All substitute parts listed meet these core electrical and mechanical parameters. Variations in inductance tolerance, saturation current, self-resonant frequency, and physical dimensions are secondary considerations that do not disqualify substitution eligibility when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active production components with ROHS3 compliance and REACH unaffected status, meeting the regulatory and environmental requirements of the original 74458168.

Pulse Electronics P0250.683NLT and P0250.683NL offer inductance tolerance of ±15%, which is tighter than the original ±20% specification. Both parts support extended operating temperature to 130°C and maintain identical current rating and DC resistance specifications. These parts are manufacturer-recommended substitutes.

Bourns Inc. SDR1806-680ML matches the original inductance tolerance of ±20% and operating temperature range of -40°C ~ 125°C. The current rating is 2.1 A, which is 0.2 A lower than the original specification. This part is suitable for applications where the 2.1 A rating is sufficient and does not exceed design current requirements.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics P0250.683NLT be used as a direct replacement for the Würth 74458168?

A: Yes. The P0250.683NLT meets all critical electrical parameters: 68 µH inductance, 2.3 A current rating, and 130 mOhm maximum DC resistance. Both parts are unshielded, surface mount, ROHS3 compliant, and operate across -40°C ~ 125°C minimum. The tighter ±15% tolerance on the Pulse part provides improved inductance accuracy.

Q: What is the difference between P0250.683NLT and P0250.683NL?

A: Both Pulse Electronics parts share identical electrical specifications: 68 µH inductance, 2.3 A current rating, 130 mOhm DCR, and ±15% tolerance. The primary difference is packaging designation. P0250.683NLT is specified as Tape & Reel, while P0250.683NL packaging is not specified in the provided data.

Q: Is the Bourns SDR1806-680ML a suitable substitute if my application requires 2.3 A continuous current?

A: The SDR1806-680ML is rated for 2.1 A continuous current, which is 0.2 A below the original 74458168 specification of 2.3 A. This part is suitable only for applications where the actual current requirement does not exceed 2.1 A. For designs requiring the full 2.3 A rating, the Pulse Electronics alternatives are recommended.

Q: Do all substitute parts have the same physical dimensions?

A: Physical dimensions vary slightly across the substitute parts. The Würth 74458168 measures 0.730" L x 0.600" W x 0.280" H (18.54mm x 15.24mm x 7.11mm). The Pulse parts measure 0.733" L x 0.596" W x 0.290" H (18.62mm x 15.14mm x 7.36mm). The Bourns SDR1806-680ML measures 0.720" L x 0.551" W x 0.272" H (18.30mm x 14.00mm x 6.90mm). Verify PCB layout compatibility before final selection.

Q: Are all parts compliant with environmental and regulatory standards?

A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 with HTSUS code 8504.50.4000. All parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements.