CD43NP-4R7MC Equivalent & Substitute Parts

Part Overview

The CD43NP-4R7MC is a 4.7 µH unshielded ferrite core inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 1.62 A continuous current with a maximum DC resistance of 108.7 mOhm. The part is classified as Active status and is RoHS3 compliant, making it suitable for modern electronic applications requiring compact inductance solutions in the microhenry range.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Key Parameters

Parameter	Value	Unit
Inductance	4.7	µH
Inductance Tolerance	±20%	%
Current Rating	1.62	A
DC Resistance (Max)	108.7	mOhm
Core Material	Ferrite	—
Shielding	Unshielded	—
Package Size	4.50 x 4.00 x 3.50 mm	L x W x H
Mounting Type	Surface Mount	—
Operating Temperature	-40 to 100	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CD43NP-4R7MC is determined by the following critical parameters:

Electrical Compatibility Criteria:

Inductance value: 4.7 µH (within ±20% tolerance band)
Current rating: minimum 1.62 A continuous
DC resistance: maximum 108.7 mOhm
Core material: Ferrite
Shielding configuration: Unshielded

Mechanical Compatibility Criteria:

Package dimensions: 4.50 x 4.00 x 3.50 mm (L x W x H)
Mounting type: Surface Mount
Packaging format: Tape & Reel (TR)

Compliance Criteria:

RoHS3 compliance required
Moisture Sensitivity Level: 1 (Unlimited)

The substitute part SDR0403-4R7ML meets all electrical and mechanical compatibility requirements while maintaining ferrite core construction and unshielded configuration.

Parameter Comparison

Parameter	CD43NP-4R7MC (Main)	SDR0403-4R7ML (Substitute)	Compatibility
Manufacturer	Sumida America Components Inc.	Bourns Inc.	Different manufacturers
Series	CD43	SDR0403	Different series
Inductance	4.7 µH	4.7 µH	Identical
Inductance Tolerance	±20%	±20%	Identical
Current Rating	1.62 A	1.7 A	Compatible (substitute rated higher)
DC Resistance (Max)	108.7 mOhm	94 mOhm	Compatible (substitute lower)
Core Material	Ferrite	Ferrite	Identical
Shielding	Unshielded	Unshielded	Identical
Package Size (L x W x H)	4.50 x 4.00 x 3.50 mm	4.50 x 4.00 x 3.50 mm	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature	-40 to 100°C	-40 to 125°C	Compatible (substitute wider range)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Active	Active	Both active

Engineering Selection Recommendations

CD43NP-4R7MC (Sumida): Select this part when existing design validation, supply chain qualification, or inventory management specifically requires the Sumida CD43 series. The part is Active status with full RoHS3 compliance and unlimited moisture sensitivity rating.

SDR0403-4R7ML (Bourns): This substitute part is suitable for applications where the following advantages are beneficial:

Higher current rating (1.7 A vs. 1.62 A) provides additional thermal margin
Lower DC resistance (94 mOhm vs. 108.7 mOhm) reduces power dissipation
Extended operating temperature range (-40 to 125°C vs. -40 to 100°C)
Active product status with full RoHS3 compliance and REACH unaffected designation

Both parts maintain identical inductance values, package dimensions, mounting type, and core material specifications. Selection between these parts should be based on supply availability, cost considerations, and thermal performance requirements of the specific application.

Frequently Asked Questions (FAQ)

Q: Can SDR0403-4R7ML be used as a direct replacement for CD43NP-4R7MC?

A: Yes. Both parts share identical inductance (4.7 µH), tolerance (±20%), package dimensions (4.50 x 4.00 x 3.50 mm), mounting type (Surface Mount), core material (Ferrite), and shielding configuration (Unshielded). The substitute part meets or exceeds all electrical specifications of the main part.

Q: What are the electrical differences between these parts?

A: The SDR0403-4R7ML has a higher current rating (1.7 A vs. 1.62 A) and lower DC resistance (94 mOhm vs. 108.7 mOhm). These differences favor the substitute part in thermal performance. Both parts operate within the same inductance tolerance band.

Q: Are there any temperature operating range differences?

A: Yes. The CD43NP-4R7MC operates from -40 to 100°C, while the SDR0403-4R7ML operates from -40 to 125°C. The substitute part provides a 25°C higher maximum operating temperature, which may be advantageous in high-temperature applications.

Q: Do both parts have the same packaging and moisture sensitivity?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging with Moisture Sensitivity Level 1 (Unlimited), indicating no moisture precautions are required during storage or handling.

Q: Are both parts RoHS3 compliant?

A: Yes. Both CD43NP-4R7MC and SDR0403-4R7ML are RoHS3 compliant. The substitute part additionally carries REACH unaffected designation.

Q: What is the inductance frequency test specification for each part?

A: The CD43NP-4R7MC is tested at 7.96 MHz, while the SDR0403-4R7ML is tested at 1 kHz. Both parts maintain the specified 4.7 µH inductance value within their respective test conditions and ±20% tolerance band.

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