CDH74NP-471JC Equivalent & Substitute Parts

Part Overview

The CDH74NP-471JC is a 470 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 330 mA continuous current with a maximum DC resistance of 2.39 Ohm and operates across the temperature range of -40°C to 100°C. The part is RoHS3 compliant and carries an MSL rating of 1 (Unlimited). As an active product with 742 units in stock, alternative equivalent components may be required for design flexibility, supply chain optimization, or specific application requirements where substitute inductors meet or exceed the electrical and mechanical specifications.

Substiute Parts

CDH74NP-471JC

Sumida America Components Inc.In Stock: 814CDH74NP-471JC Datasheet

Current PartRFQ

SDR7045-471K

Bourns Inc.In Stock: 1651SDR7045-471K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH74NP-471JC is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Inductance value: 470 µH (tolerance range acceptable within design margins)
• Core type: Ferrite drum core, wirewound construction
• Shielding configuration: Unshielded
• Mounting technology: Surface mount
• Current rating: Equal to or greater than 330 mA
• DC resistance: Equal to or lower than 2.39 Ohm (lower DCR is acceptable as it reduces losses)
• Operating temperature range: Minimum -40°C to 100°C coverage
• Compliance: RoHS3 compliant, MSL 1 rating

The substitute part SDR7045-471K from Bourns Inc. meets these criteria with equivalent inductance, superior current rating (340 mA), lower DC resistance (1.85 Ohm), and extended operating temperature range (-40°C to 125°C). Both components are ferrite drum core unshielded inductors in surface mount nonstandard packages with RoHS3 compliance and unlimited moisture sensitivity ratings.

Parameter Comparison

Engineering Selection Recommendations

The SDR7045-471K from Bourns Inc. is a direct substitute for the CDH74NP-471JC. Both components are active products with RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

Selection basis:

The substitute part demonstrates superior electrical performance with 10 mA higher current rating and 0.54 Ohm lower DC resistance, resulting in reduced power dissipation. The extended operating temperature range to 125°C provides additional thermal margin for applications requiring higher ambient temperature operation. Both inductors maintain equivalent inductance values, core materials, shielding configurations, and surface mount technology.

Physical dimensions of the SDR7045-471K are smaller (7.00mm x 7.00mm footprint, 4.80mm height) compared to the CDH74NP-471JC (8.00mm x 7.30mm footprint, 5.20mm height), offering potential PCB layout advantages. The substitute part's ±10% inductance tolerance is wider than the main part's ±5% tolerance; however, both fall within standard industrial specifications for wirewound inductors.

Component selection between these two parts should be based on specific application requirements regarding tolerance specifications, thermal operating conditions, and PCB space constraints.

Frequently Asked Questions (FAQ)

Q: Can the SDR7045-471K replace the CDH74NP-471JC in all applications?

A: The SDR7045-471K meets or exceeds the electrical specifications of the CDH74NP-471JC across current rating, DC resistance, and operating temperature range. Substitution is valid for applications where the ±10% inductance tolerance of the substitute part is acceptable. Applications requiring the tighter ±5% tolerance of the main part require verification against circuit design specifications.

Q: What are the physical compatibility considerations?

A: The SDR7045-471K has a smaller footprint (7.00mm x 7.00mm versus 8.00mm x 7.30mm) and lower profile (4.80mm versus 5.20mm). PCB layout modifications may be required if the original design utilizes the full dimensions of the CDH74NP-471JC. Verify pad spacing and clearance requirements for the substitute component.

Q: Are there compliance differences between these parts?

A: Both components are RoHS3 compliant with MSL 1 (Unlimited) ratings. No compliance differences exist. Both carry ECCN EAR99 and HTSUS 8504.50.4000 classifications.

Q: How do the DC resistance values affect circuit performance?

A: The SDR7045-471K exhibits 0.54 Ohm lower DC resistance (1.85 Ohm versus 2.39 Ohm maximum). This reduction decreases resistive losses and heat generation in the inductor. For current-limited applications, the lower DCR of the substitute part may result in improved efficiency and reduced thermal stress.

Q: What is the significance of the different inductance tolerances?

A: The CDH74NP-471JC specifies ±5% tolerance while the SDR7045-471K specifies ±10% tolerance. In resonant circuits, filter networks, or impedance-critical applications, the tighter tolerance of the main part may be required. In current-limiting or general filtering applications, the wider tolerance of the substitute part is typically acceptable.

Q: Are there frequency-dependent performance differences?

A: The SDR7045-471K provides additional frequency characterization data (Q @ 796kHz = 20, Self Resonant Frequency = 4MHz) not specified for the CDH74NP-471JC. These parameters indicate the substitute part's performance at higher frequencies. Applications operating near or above the self-resonant frequency require evaluation of frequency-dependent behavior.