CDH74NP-100LC Equivalent & Substitute Parts

Part Overview

The CDH74NP-100LC is a 10 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 2.75 A continuous current with a maximum DC resistance of 56 mOhm. The part is currently active in production and available in high volume inventory (792 pieces in stock). Equivalent and substitute parts are identified when design requirements permit tolerance variations, current rating adjustments, or when alternative sourcing is necessary for supply chain continuity.

Substiute Parts

CDH74NP-100LC

Sumida America Components Inc.In Stock: 900CDH74NP-100LC Datasheet

Current PartRFQ

SDR7045-100M

Bourns Inc.In Stock: 1797SDR7045-100M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH74NP-100LC is permissible when the following conditions are met:

Primary Substitution Criteria:

• Inductance value remains 10 µH
• Core material is ferrite drum core, unshielded construction
• Mounting type is surface mount
• RoHS3 compliance is maintained
• Moisture sensitivity level does not exceed MSL 1

Secondary Compatibility Factors:

• Current rating may be lower than the original part if circuit design permits
• DC resistance may exceed the original specification within acceptable circuit performance limits
• Inductance tolerance may be wider than ±15% if circuit design accommodates the variation
• Operating temperature range may be narrower than -40°C to 100°C if application requirements are met
• Package dimensions may differ provided mechanical fit is verified

The SDR7045-100M from Bourns Inc. meets the primary substitution criteria and is identified as an equivalent part for the CDH74NP-100LC.

Parameter Comparison

Engineering Selection Recommendations

CDH74NP-100LC (Sumida America Components Inc.):

• Primary choice when current rating of 2.75 A is required
• Preferred when DC resistance specification of 56 mOhm maximum is critical to circuit performance
• Suitable for applications operating within -40°C to 100°C range
• ROHS3 compliant and MSL 1 rated for standard manufacturing environments

SDR7045-100M (Bourns Inc.):

• Acceptable substitute when circuit design permits 2.0 A current rating
• Suitable when higher DC resistance of 70 mOhm maximum is acceptable
• Recommended for applications requiring extended operating temperature range up to 125°C
• Smaller package footprint (7.00mm x 7.00mm x 4.80mm) may provide PCB layout advantages
• ROHS3 compliant and MSL 1 rated for standard manufacturing environments
• Both parts are active products with established supply chains

Selection between these parts depends on circuit current requirements, thermal operating conditions, and PCB space constraints. Both parts maintain identical inductance value, core construction, and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can the SDR7045-100M replace the CDH74NP-100LC in all applications?

A: The SDR7045-100M is a functional equivalent for inductance value and core construction. However, the lower current rating (2.0 A versus 2.75 A) and higher DC resistance (70 mOhm versus 56 mOhm) require verification that circuit design parameters are compatible. The smaller package dimensions must also be confirmed for PCB layout fit.

Q: What is the significance of the different inductance tolerance specifications?

A: The CDH74NP-100LC specifies ±15% tolerance while the SDR7045-100M specifies ±20% tolerance. Both parts deliver 10 µH nominal inductance. The wider tolerance of the Bourns part means individual units may deviate further from nominal value. Circuit designs must accommodate the applicable tolerance range of the selected part.

Q: Are there mechanical compatibility concerns between these parts?

A: Yes. The CDH74NP-100LC measures 8.00mm L x 7.30mm W x 5.20mm H, while the SDR7045-100M measures 7.00mm L x 7.00mm W x 4.80mm H. The Bourns part is smaller in all dimensions. PCB footprint and component placement must be verified before substitution.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the CDH74NP-100LC and SDR7045-100M are ROHS3 compliant and rated MSL 1 (Unlimited moisture sensitivity level). Both parts are suitable for standard manufacturing and storage environments without special handling.

Q: What is the impact of different DC resistance values on circuit performance?

A: DC resistance affects power dissipation and voltage drop across the inductor. The CDH74NP-100LC at 56 mOhm maximum and the SDR7045-100M at 70 mOhm maximum will produce different I²R losses at the same current level. Circuit thermal analysis and efficiency calculations must account for the selected part's DCR specification.

Q: Can the SDR7045-100M be used in applications requiring the full 2.75 A rating?

A: No. The SDR7045-100M is rated for 2.0 A continuous current with saturation at 2.3 A. Operation above these ratings will cause inductor saturation and loss of inductance. The CDH74NP-100LC must be used when 2.75 A current is required.

Q: What is the difference in operating temperature capability?

A: The CDH74NP-100LC operates from -40°C to 100°C, while the SDR7045-100M operates from -40°C to 125°C. The Bourns part provides 25°C additional upper temperature margin. Selection depends on application thermal requirements.