CD43NP-180MC Equivalent & Substitute Parts

Part Overview

The CD43NP-180MC is a fixed unshielded inductor manufactured by Sumida America Components Inc. with an inductance value of 18 µH, rated for 740 mA continuous current, and a maximum DC resistance of 338 mOhm. This component is designed for surface mount applications in compact form factors and is currently in active production status. Alternative equivalent parts may be required due to inventory availability, lead time considerations, or specific application requirements within the defined electrical and mechanical parameter ranges.

Substiute Parts

CD43NP-180MC

Sumida America Components Inc.In Stock: 803CD43NP-180MC Datasheet

Current PartRFQ

SDR0403-180ML

Bourns Inc.In Stock: 36690SDR0403-180ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD43NP-180MC is permissible with parts that maintain electrical and mechanical compatibility within the following criteria:

Electrical Compatibility Requirements:

• Inductance value: 18 µH (matching the primary specification)
• Inductance tolerance: ±20% (as specified for the main part)
• Current rating: Equal to or greater than 740 mA
• DC resistance: Equal to or less than 338 mOhm maximum
• Core material: Ferrite (unshielded configuration)

Mechanical Compatibility Requirements:

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

Compliance Requirements:

• RoHS3 compliance status
• Operating temperature range: Minimum -40°C to 100°C

The substitute part SDR0403-180ML meets all electrical and mechanical compatibility criteria and is qualified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SDR0403-180ML manufactured by Bourns Inc. is a qualified equivalent substitute for the CD43NP-180MC. Both components are active production parts with ROHS3 compliance certification. The substitute part demonstrates superior electrical performance characteristics, including a higher current rating of 840 mA compared to the 740 mA specification of the main part, and an extended operating temperature range of -40°C to 125°C versus -40°C to 100°C. DC resistance values are within acceptable tolerance, with the substitute at 340 mOhm maximum compared to 338 mOhm maximum for the original part. Physical dimensions and mounting configurations are identical, ensuring direct mechanical compatibility in existing PCB layouts. Selection between these parts should be based on availability, lead time, and procurement requirements, as both meet or exceed the electrical and mechanical specifications for this application category.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-180ML be used as a direct replacement for the CD43NP-180MC in existing designs?

A: Yes. Both components share identical inductance values (18 µH), tolerance specifications (±20%), physical dimensions (4.50 x 4.00 x 3.50 mm), and mounting configurations (surface mount, Tape & Reel packaging). The substitute part meets all electrical requirements and exceeds the current rating and temperature range specifications of the original part.

Q: What are the key electrical differences between these two parts?

A: The SDR0403-180ML provides a higher current rating (840 mA versus 740 mA) and an extended operating temperature range (-40°C to 125°C versus -40°C to 100°C). DC resistance values are nearly identical, with the substitute at 340 mOhm maximum compared to 338 mOhm maximum. These differences represent performance enhancements rather than limitations.

Q: Are both parts RoHS compliant?

A: Yes. Both the CD43NP-180MC and SDR0403-180ML are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Do these inductors have identical physical footprints?

A: Yes. Both components have identical dimensions of 4.50 mm length, 4.00 mm width, and 3.50 mm maximum seated height. They are packaged identically in Tape & Reel format and are compatible with the same PCB layouts and assembly processes.

Q: What is the inductance tolerance for both parts?

A: Both the CD43NP-180MC and SDR0403-180ML have an inductance tolerance of ±20%, meaning the actual inductance value will fall within the range of 14.4 µH to 21.6 µH at the specified test frequency.