Würth Elektronik 74455068 Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74455068 is a 6.8 µH unshielded drum core wirewound inductor rated for 1.4 A continuous current with a maximum DC resistance of 130 mOhm. This surface mount component operates across the temperature range of -40°C to 100°C and is designed for applications requiring compact, high-frequency performance up to 29 MHz self-resonant frequency. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility can be maintained within the allowed parameter tolerances for this inductor category.

Substiute Parts

74455068

Würth ElektronikIn Stock: 225274455068 Datasheet

Current PartRFQ

P0770.682NLT

Pulse ElectronicsIn Stock: 3020P0770.682NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74455068 are qualified based on strict electrical and mechanical parameter matching within this inductor category. The substitution logic is based on the following criteria:

Primary Electrical Parameters (Must Match):

• Inductance value: 6.8 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• DC resistance: 130 mOhm maximum
• Shielding configuration: Unshielded

Secondary Electrical Parameters (Must Be Compatible):

• Current rating: Equal to or greater than 1.4 A continuous
• Saturation current (Isat): Equal to or greater than 1.2 A
• Self-resonant frequency: Suitable for high-frequency operation

Mechanical Parameters (Must Match):

• Mounting type: Surface mount
• Package dimensions: 0.260" L x 0.175" W x 0.115" H (6.60mm x 4.45mm x 2.92mm)
• Core construction: Wirewound configuration

Compliance Parameters (Must Match):

• RoHS3 compliance status
• Moisture sensitivity level: MSL 1 (Unlimited)
• Operating temperature range: -40°C minimum to 100°C minimum

The Pulse Electronics P0770.682NLT qualifies as a manufacturer-recommended substitute based on matching inductance, tolerance, DC resistance, shielding, package dimensions, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (Würth Elektronik 74455068): Use the original 74455068 when the application requires the full 1.4 A continuous current rating and operates within the -40°C to 100°C temperature range. This part maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and environmental regulatory adherence.

Substitute Part Selection (Pulse Electronics P0770.682NLT): The P0770.682NLT is qualified as a manufacturer-recommended substitute when the application current requirement does not exceed 1.2 A continuous. This substitute maintains identical inductance, tolerance, DC resistance, package dimensions, and compliance certifications. The extended operating temperature range (-40°C to 130°C) provides additional thermal margin for applications operating at elevated temperatures. Both parts carry active product status and ROHS3 compliance.

Selection Criteria:

• If continuous current requirement is ≤1.2 A: Either part is acceptable
• If continuous current requirement is >1.2 A and ≤1.4 A: Use 74455068 only
• If operating temperature exceeds 100°C: P0770.682NLT provides extended thermal range
• For new designs with no legacy constraints: Either part is acceptable based on availability and lead time

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics P0770.682NLT be used as a direct replacement for the Würth Elektronik 74455068?

A: The P0770.682NLT is a qualified substitute when the application current does not exceed 1.2 A continuous. The substitute has identical inductance (6.8 µH), tolerance (±20%), DC resistance (130 mOhm max), package dimensions, and compliance ratings. The primary difference is the continuous current rating: 1.2 A versus 1.4 A. Verify your application's maximum continuous current requirement before substitution.

Q: What is the key difference between these two inductors?

A: The primary electrical difference is the continuous current rating. The 74455068 is rated for 1.4 A continuous, while the P0770.682NLT is rated for 1.2 A continuous. Both parts have identical saturation current (Isat) of 1.2 A. The P0770.682NLT also offers an extended operating temperature range of -40°C to 130°C compared to -40°C to 100°C for the 74455068.

Q: Are the package dimensions identical?

A: Yes. Both inductors have identical surface mount package dimensions of 0.260" L x 0.175" W x 0.115" H (6.60mm x 4.45mm x 2.92mm). They are footprint-compatible for PCB assembly without layout modifications.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both the 74455068 and P0770.682NLT are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1), meeting current environmental and handling standards.

Q: What does the ±20% inductance tolerance mean for circuit design?

A: The ±20% tolerance indicates that the actual inductance value may vary between 5.44 µH and 8.16 µH from the nominal 6.8 µH specification. Circuit designs must account for this tolerance range in frequency response, impedance matching, and filtering calculations.

Q: Can these inductors be used interchangeably in high-frequency applications?

A: Both inductors are suitable for high-frequency operation. The 74455068 has a self-resonant frequency of 29 MHz. The P0770.682NLT's self-resonant frequency is not specified in the provided data. Verify the P0770.682NLT's high-frequency characteristics against your specific application requirements before substitution in frequency-critical circuits.