CD43NP-220MC Equivalent & Substitute Parts

Part Overview

The CD43NP-220MC is a 22 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate current handling up to 680 mA with a maximum DC resistance of 378 mOhm. The component operates across an industrial temperature range of -40°C to 100°C and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances, ensuring design continuity and supply chain flexibility.

Substiute Parts

CD43NP-220MC

Sumida America Components Inc.In Stock: 2124CD43NP-220MC Datasheet

Current PartRFQ

SDR0403-220ML

Bourns Inc.In Stock: 10418SDR0403-220ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD43NP-220MC is permissible with the SDR0403-220ML based on the following critical parameters:

Inductance Match: Both parts specify 22 µH with ±20% tolerance, ensuring electrical equivalence in inductance value.

Current Handling Compatibility: The substitute part (SDR0403-220ML) provides 760 mA current rating, which exceeds the main part's 680 mA specification. This represents an upward-compatible substitution suitable for applications operating at or below 680 mA.

DC Resistance Equivalence: Maximum DC resistance values are 378 mOhm (main part) and 380 mOhm (substitute), representing negligible difference within engineering tolerance and acceptable for equivalent thermal and power dissipation performance.

Physical Compatibility: Both components share identical surface mount package dimensions (4.50mm x 4.00mm x 3.50mm), enabling direct PCB footprint compatibility without layout modification.

Shielding and Core Material: Both parts are unshielded ferrite core inductors, maintaining electromagnetic performance characteristics.

Compliance Alignment: Both components are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity, ensuring equivalent environmental and regulatory compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The CD43NP-220MC remains the primary component choice when specified in original designs and available from inventory (2100 pcs in stock).

Substitute Applicability: The SDR0403-220ML (Bourns Inc.) is a qualified substitute for applications requiring 22 µH inductance at current levels up to 680 mA. The substitute's higher current rating (760 mA) and extended operating temperature range (-40°C to 125°C) provide design margin without compromising electrical performance.

Compliance Status: Both components maintain Active product status and full RoHS3 compliance, ensuring regulatory and environmental requirement alignment for current and future applications.

Supply Chain Consideration: The substitute part maintains significantly higher inventory availability (10400 pcs), supporting extended production schedules and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can SDR0403-220ML be used as a direct replacement for CD43NP-220MC in existing designs?

A: Yes. Both components share identical inductance (22 µH ±20%), equivalent DC resistance (378-380 mOhm), matching package dimensions (4.50mm x 4.00mm x 3.50mm), and identical shielding characteristics. No PCB layout or schematic modifications are required.

Q: What is the significance of the higher current rating on the substitute part?

A: The SDR0403-220ML specifies 760 mA current rating compared to the main part's 680 mA. This represents upward compatibility; applications operating at or below 680 mA experience no performance change. The higher rating provides additional design margin without penalty.

Q: Are there temperature range differences between these parts?

A: The substitute part operates across -40°C to 125°C, compared to the main part's -40°C to 100°C. For applications within the main part's temperature range, both components perform identically. The substitute provides extended capability for higher-temperature environments.

Q: How do DC resistance values compare?

A: Maximum DC resistance is 378 mOhm (main part) and 380 mOhm (substitute), a 2 mOhm difference representing 0.5% variance. This difference is negligible for thermal and power dissipation calculations in typical applications.

Q: Are both components RoHS3 compliant?

A: Yes. Both CD43NP-220MC and SDR0403-220ML are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance.

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

A: The main part specifies inductance measurement at 2.52 MHz, while the substitute specifies 1 kHz. Both measurements confirm the 22 µH nominal inductance value within ±20% tolerance across their respective test frequencies.