CDH74NP-470KC Equivalent & Substitute Parts

Part Overview

The CDH74NP-470KC is a 47 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 1.2 A continuous current with a maximum DC resistance of 230 mOhm and operates across the temperature range of -40°C to 100°C. The part is currently active in production and RoHS3 compliant. Equivalent and substitute parts are identified when design requirements permit component sourcing flexibility, inventory constraints exist, or supply chain optimization is necessary while maintaining electrical and mechanical compatibility.

Substiute Parts

CDH74NP-470KC

Sumida America Components Inc.In Stock: 2133CDH74NP-470KC Datasheet

Current PartRFQ

SDR7045-470K

Bourns Inc.In Stock: 2946SDR7045-470K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH74NP-470KC is permissible with the SDR7045-470K based on the following alignment of critical electrical and mechanical parameters:

Matched Parameters:

• Inductance: 47 µH (identical)
• Inductance Tolerance: ±10% (identical)
• DC Resistance: 230 mOhm Max (identical)
• Core Type: Ferrite, Unshielded, Drum Core (identical)
• Mounting Type: Surface Mount (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Differing Parameters Requiring Evaluation:

• Current Rating: CDH74NP-470KC rated 1.2 A; SDR7045-470K rated 1 A
• Operating Temperature: CDH74NP-470KC -40°C to 100°C; SDR7045-470K -40°C to 125°C
• Physical Dimensions: CDH74NP-470KC 8.00mm L x 7.30mm W x 5.20mm H; SDR7045-470K 7.00mm L x 7.00mm W x 4.80mm H

The SDR7045-470K is a valid substitute when the application current requirement does not exceed 1 A. The lower current rating of the substitute part reflects its reduced saturation current (1.1 A) compared to the main part specification. Physical dimensions are smaller, which may provide PCB layout advantages but requires verification of mechanical fit within the assembly.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (CDH74NP-470KC): Select the CDH74NP-470KC when the application requires the full 1.2 A current rating. This part is active in production, RoHS3 compliant, and available in quantity (2110 pcs in stock). The operating temperature range of -40°C to 100°C is suitable for standard industrial and commercial applications.

Substitute Part Selection (SDR7045-470K): The SDR7045-470K is suitable as a substitute when all of the following conditions are met:

• Application current requirement does not exceed 1 A continuous operation
• PCB layout can accommodate the smaller physical footprint (7.00mm x 7.00mm x 4.80mm)
• Extended operating temperature range to 125°C provides additional thermal margin if required

Both parts are active products with RoHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility. The substitute part is available in higher quantity (2878 pcs in stock), which may support supply chain optimization objectives.

Frequently Asked Questions (FAQ)

Q: Can the SDR7045-470K replace the CDH74NP-470KC in all applications?

A: No. The SDR7045-470K has a lower current rating (1 A versus 1.2 A). Substitution is valid only when the application current requirement does not exceed 1 A. Exceeding this limit will cause the substitute part to saturate prematurely and may result in circuit malfunction or component failure.

Q: What is the impact of the different physical dimensions?

A: The SDR7045-470K is smaller in all dimensions (7.00mm x 7.00mm x 4.80mm versus 8.00mm x 7.30mm x 5.20mm). This provides potential PCB layout advantages and reduced board space consumption. However, the smaller footprint must be verified for mechanical fit within the existing assembly design, including solder pad spacing and clearance requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the CDH74NP-470KC and SDR7045-470K are RoHS3 compliant and have unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard PCB assembly processes and environmental regulations.

Q: What is the difference in DC resistance between the two parts?

A: Both parts specify a maximum DC resistance of 230 mOhm. This identical specification ensures equivalent power dissipation and thermal performance at the same current levels.

Q: Can the substitute part operate at higher temperatures?

A: Yes. The SDR7045-470K has an extended operating temperature range of -40°C to 125°C compared to the CDH74NP-470KC range of -40°C to 100°C. This provides an additional 25°C of upper temperature margin, which may be beneficial in thermally constrained applications.

Q: Are the inductance values and tolerances identical?

A: Yes. Both parts are 47 µH inductors with ±10% tolerance. The inductance specification and acceptable variation range are identical, ensuring equivalent circuit performance in frequency-dependent applications.

Q: What is the saturation current of each part?

A: The CDH74NP-470KC saturation current is not specified in the provided data. The SDR7045-470K has a saturation current (Isat) of 1.1 A, which aligns with its 1 A continuous current rating and defines the maximum current before inductance degradation occurs.