CD75NP-181KC Equivalent & Substitute Parts

Part Overview

The CD75NP-181KC is a 180 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring 510 mA current rating with a maximum DC resistance of 710mOhm. The component operates across the temperature range of -40°C to 100°C and is RoHS3 compliant. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility within specified tolerances.

Substiute Parts

CD75NP-181KC

Sumida America Components Inc.In Stock: 1018CD75NP-181KC Datasheet

Current PartRFQ

SDR0805-181KL

Bourns Inc.In Stock: 3391SDR0805-181KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD75NP-181KC is determined by strict equivalence of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 180 µH ±10%
• Current rating: 510 mA minimum
• DC resistance: Within acceptable operating limits
• Shielding type: Unshielded
• Core material: Ferrite
• Mounting type: Surface Mount
• Operating temperature range: Minimum -40°C to 100°C coverage
• RoHS3 compliance

The SDR0805-181KL from Bourns Inc. meets all primary substitution criteria. Both components share identical inductance specifications, current ratings, and core material composition. Mechanical compatibility is maintained through surface mount packaging and nonstandard case dimensions suitable for equivalent PCB footprints.

Parameter Comparison

Engineering Selection Recommendations

Both the CD75NP-181KC and SDR0805-181KL are active products with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Selection between these components is based on the following engineering considerations:

CD75NP-181KC (Sumida): Lower DC resistance specification (710mOhm Max) provides reduced power dissipation in applications sensitive to resistive losses. Operating temperature range extends to 100°C maximum.

SDR0805-181KL (Bourns): Extended operating temperature range to 125°C accommodates higher ambient temperature environments. Slightly higher DC resistance (770mOhm Max) remains within acceptable limits for most applications. Additional electrical characterization data provided (Q @ 796kHz: 12, Self Resonant Frequency: 5MHz, Saturation Current: 800mA) supports detailed circuit analysis.

Both components are suitable for direct substitution in surface mount applications requiring 180 µH inductance at 510 mA current rating with ferrite core construction.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-181KL directly replace the CD75NP-181KC on existing PCBs?

A: Direct PCB replacement requires verification of footprint compatibility. The CD75NP-181KC measures 0.307" L x 0.276" W, while the SDR0805-181KL measures 0.307" L x 0.307" W. The width difference of 0.031" (0.80mm) may require PCB layout adjustment. Height specifications are compatible (5.50mm vs 5.30mm seated height).

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

A: The CD75NP-181KC specifies 710mOhm maximum DCR, while the SDR0805-181KL specifies 770mOhm maximum. This 60mOhm difference represents approximately 8.5% higher resistance in the Bourns component. In applications where resistive losses directly impact efficiency or thermal performance, this difference must be evaluated against circuit requirements.

Q: Are both components suitable for high-temperature applications?

A: The CD75NP-181KC operates to 100°C maximum, while the SDR0805-181KL extends to 125°C. For applications requiring sustained operation above 100°C, the SDR0805-181KL is the appropriate selection.

Q: What does the ±10% inductance tolerance mean for circuit design?

A: Both components carry ±10% inductance tolerance, meaning the actual inductance value may range from 162 µH to 198 µH. Circuit designs must accommodate this tolerance range to ensure proper operation across the full production variation.

Q: Are both components RoHS3 compliant?

A: Yes, both the CD75NP-181KC and SDR0805-181KL are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity), suitable for standard PCB assembly and storage conditions without special handling requirements.