CD75NP-470KC Equivalent & Substitute Parts

Part Overview

The CD75NP-470KC is a 47 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate inductance values with a current rating of 1.1 A and maximum DC resistance of 180 mOhm. The component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when original stock becomes unavailable, when lead times require alternative sourcing, or when design flexibility permits equivalent electrical performance within specified parameter tolerances.

Substiute Parts

CD75NP-470KC

Sumida America Components Inc.In Stock: 858CD75NP-470KC Datasheet

Current PartRFQ

SDR0805-470KL

Bourns Inc.In Stock: 6431SDR0805-470KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD75NP-470KC is permissible when the following electrical and mechanical parameters are maintained within acceptable tolerances:

Critical Matching Parameters:

• Inductance value: 47 µH with ±10% tolerance
• Core material: Ferrite construction
• Shielding configuration: Unshielded
• Mounting type: Surface Mount (SMD)
• Current rating: Minimum 1.0 A (substitute must support the application current requirement)
• DC resistance: Maximum 200 mOhm (slight increase acceptable for equivalent performance)
• Operating temperature range: Minimum -40°C to 100°C coverage
• RoHS3 compliance: Required for regulatory equivalence
• Moisture sensitivity: MSL 1 classification

The SDR0805-470KL from Bourns Inc. satisfies all substitution criteria through matching inductance specification, ferrite core material, unshielded configuration, surface mount packaging, and RoHS3 compliance. The substitute part demonstrates equivalent electrical performance within the defined parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The SDR0805-470KL qualifies as an equivalent substitute based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical inductance values (47 µH) with matching ±10% tolerance specifications. The ferrite core material and unshielded configuration are identical. DC resistance variance (180 mOhm vs. 200 mOhm) represents a 10% increase within acceptable engineering margins for inductor applications.

Current Rating Consideration: The substitute part is rated at 1.0 A compared to the original 1.1 A specification. This 0.1 A reduction requires verification that the application current demand does not exceed 1.0 A. If the circuit operates at or below 1.0 A, the substitute is suitable. If sustained operation above 1.0 A is required, the original CD75NP-470KC must be retained.

Regulatory Compliance: Both components hold ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory standing.

Temperature Performance: The SDR0805-470KL provides extended operating temperature range (-40°C to 125°C) compared to the original (-40°C to 100°C), offering improved thermal margin for applications operating near upper temperature limits.

Physical Compatibility: Dimensional differences exist in width (0.80mm) and height (0.20mm). PCB layout verification is required to confirm that the substitute footprint accommodates these dimensional variations without mechanical interference or thermal management issues.

Product Status: Both components maintain Active product status with established supply chains and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-470KL directly replace the CD75NP-470KC without circuit modification?

A: Direct replacement is permissible when application current remains at or below 1.0 A and PCB layout accommodates the dimensional differences (0.80mm width increase, 0.20mm height reduction). No circuit modification is required for electrical equivalence. Physical layout verification is mandatory.

Q: What is the significance of the 20 mOhm DC resistance difference?

A: The SDR0805-470KL exhibits 200 mOhm maximum DCR compared to 180 mOhm for the CD75NP-470KC. This 10% increase results in proportionally higher resistive losses in the inductor. For applications sensitive to power dissipation or efficiency, this variance must be evaluated against circuit performance requirements. In most general-purpose applications, this difference is negligible.

Q: Are there physical footprint compatibility concerns?

A: The substitute part measures 7.80mm L x 7.80mm W x 5.30mm H compared to the original 7.80mm L x 7.00mm W x 5.50mm H. The 0.80mm width increase and 0.20mm height reduction require PCB layout verification. Confirm that the substitute component does not create mechanical conflicts with adjacent components or thermal management structures.

Q: Does the extended temperature range of the substitute provide any advantage?

A: The SDR0805-470KL operates to 125°C compared to 100°C for the original. This extended range provides additional thermal margin for applications operating in elevated ambient conditions or with high internal power dissipation. If the circuit operates within the original -40°C to 100°C range, this advantage is not utilized.

Q: What is the impact of the 0.1 A current rating reduction?

A: The substitute part is rated for 1.0 A maximum continuous current versus 1.1 A for the original. If the application circuit draws sustained current below 1.0 A, the substitute is fully equivalent. If the circuit requires operation above 1.0 A, the original CD75NP-470KC must be used to maintain design margin and component reliability.

Q: Are both components RoHS3 compliant?

A: Yes. Both the CD75NP-470KC and SDR0805-470KL hold ROHS3 compliance certification, ensuring equivalent regulatory standing for applications subject to RoHS directives.

Q: What packaging formats are available for each part?

A: The CD75NP-470KC is supplied in Tape & Reel (TR) format. The SDR0805-470KL is available in Cut Tape (CT) and Digi-Reel® packaging. Verify that the required packaging format aligns with procurement and assembly processes.