CD75NP-680KC Equivalent & Substitute Parts

Part Overview

The CD75NP-680KC is a 68 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This component is designed for applications requiring fixed inductance with a current rating of 850 mA and maximum DC resistance of 280 mOhm. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

CD75NP-680KC

Sumida America Components Inc.In Stock: 881CD75NP-680KC Datasheet

Current PartRFQ

SDR0805-680KL

Bourns Inc.In Stock: 2913SDR0805-680KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD75NP-680KC with the SDR0805-680KL is based on strict equivalence of the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Inductance value: 68 µH (both parts)
• Inductance tolerance: ±10% (both parts)
• Current rating: 850 mA (both parts)
• Shielding configuration: Unshielded (both parts)
• Core material: Ferrite (both parts)

Mechanical Equivalence Criteria:

• Mounting type: Surface Mount (both parts)
• Package classification: Nonstandard (both parts)
• Packaging format: Tape & Reel (TR) (both parts)

Compliance Equivalence:

• RoHS3 compliance (both parts)
• MSL 1 rating (both parts)
• ECCN EAR99 classification (both parts)

The SDR0805-680KL operates within an extended temperature range (-40°C to 125°C) compared to the CD75NP-680KC (-40°C to 100°C), providing broader thermal operating capability. DC resistance of the substitute is 300 mOhm maximum, which is within acceptable tolerance for equivalent circuit performance in applications designed for the primary part.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (CD75NP-680KC): Select the CD75NP-680KC when inventory availability is confirmed and the operating temperature requirement does not exceed 100°C. This part maintains active production status with established supply chain availability (847 pieces in stock).

Substitute Part Selection (SDR0805-680KL): The SDR0805-680KL is suitable as a direct substitute when the CD75NP-680KC is unavailable. The substitute provides equivalent electrical performance with the following considerations:

• DC resistance specification of 300 mOhm maximum is 20 mOhm higher than the primary part; this difference is within acceptable tolerance for most circuit applications designed for 68 µH inductors at 850 mA.
• Extended operating temperature range (-40°C to 125°C) provides thermal margin beyond the primary part specification.
• Physical dimensions are compatible with minor width variation (7.80mm x 7.80mm versus 7.80mm x 7.00mm); height difference is negligible (5.30mm versus 5.50mm).
• Both parts maintain identical RoHS3 compliance and MSL 1 ratings, ensuring equivalent environmental and reliability characteristics.

Compliance Verification: Both parts are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity rating, and share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications, confirming regulatory and trade compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-680KL replace the CD75NP-680KC in all applications?

A: The SDR0805-680KL is electrically and mechanically compatible for applications where the CD75NP-680KC is specified. Both parts deliver 68 µH inductance at 850 mA with equivalent tolerance and shielding characteristics. The substitute's extended temperature range (-40°C to 125°C) provides additional thermal capability. DC resistance difference (300 mOhm versus 280 mOhm) is within acceptable tolerance for standard circuit operation.

Q: What is the significance of the DC resistance difference between these parts?

A: The CD75NP-680KC specifies 280 mOhm maximum DC resistance, while the SDR0805-680KL specifies 300 mOhm maximum. This 20 mOhm difference represents approximately 7% variation and is typical between different manufacturers' inductor designs. For 850 mA operation, this translates to a maximum power dissipation difference of approximately 14.45 mW, which is negligible in most circuit applications.

Q: Are there physical placement considerations when substituting these parts?

A: Both parts are surface mount components with compatible footprints. The SDR0805-680KL is slightly wider (7.80mm x 7.80mm versus 7.80mm x 7.00mm) and marginally shorter (5.30mm versus 5.50mm). These dimensional variations are within standard PCB layout tolerances and do not require design modification for standard surface mount assembly processes.

Q: Do both parts meet the same compliance and regulatory requirements?

A: Yes. Both the CD75NP-680KC and SDR0805-680KL are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity ratings, and share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications. They are equivalent for regulatory, environmental, and trade compliance purposes.

Q: What is the inductance tolerance specification for both parts?

A: Both parts specify ±10% inductance tolerance. This tolerance applies to the 68 µH nominal value, resulting in an acceptable inductance range of 61.2 µH to 74.8 µH for either part.

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

A: Both parts are unshielded ferrite core inductors designed for surface mount applications. The SDR0805-680KL provides additional frequency characterization data (Q @ 2.52 MHz = 15, Self Resonant Frequency = 8 MHz), which may be relevant for high-frequency circuit analysis. For applications requiring specific frequency response characteristics, review the complete frequency performance data for each part.