CD43NP-5R6MC Equivalent & Substitute Parts

Part Overview

The CD43NP-5R6MC is a 5.6 µH unshielded ferrite core inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 1.48 A continuous current with a maximum DC resistance of 125.7 mOhm. The part operates across the temperature range of -40°C to 100°C and is RoHS3 compliant with MSL 1 rating. As an active product with 759 units in stock, the CD43NP-5R6MC serves applications requiring compact, fixed inductance filtering and energy storage. Substitute parts are identified to provide design flexibility when primary inventory is unavailable or when enhanced electrical performance characteristics are required within compatible parameter ranges.

Substiute Parts

CD43NP-5R6MC

Sumida America Components Inc.In Stock: 818CD43NP-5R6MC Datasheet

Current PartRFQ

SDR0403-5R6ML

Bourns Inc.In Stock: 6670SDR0403-5R6ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD43NP-5R6MC is determined by strict equivalence across the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 5.6 µH with ±20% tolerance to ensure circuit performance consistency.

Current Rating: The substitute must support the application's current requirements. The CD43NP-5R6MC is rated for 1.48 A; substitutes with equal or higher current ratings are acceptable.

DC Resistance: Maximum DCR of 125.7 mOhm establishes the upper limit for power dissipation. Substitutes with lower DCR values reduce thermal losses and are compatible.

Core Material and Shielding: Both parts use ferrite core construction with unshielded configuration, maintaining electromagnetic compatibility with the original design.

Physical Dimensions: The package footprint of 4.50 × 4.00 × 3.50 mm (L × W × H) must be matched for PCB layout compatibility.

Mounting Type: Surface mount technology is required for both main and substitute parts.

Environmental Compliance: RoHS3 compliance and MSL 1 rating are mandatory for supply chain and manufacturing process compatibility.

The SDR0403-5R6ML from Bourns Inc. meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (CD43NP-5R6MC): Select when Sumida inventory is available and cost optimization is the priority. This part is active and maintains full RoHS3 and MSL 1 compliance for standard manufacturing environments.

Substitute Part (SDR0403-5R6ML): Select when enhanced electrical performance is beneficial or when Sumida supply is constrained. The Bourns SDR0403-5R6ML offers measurable advantages: 1.6 A current rating (8% higher than primary), 100 mOhm maximum DCR (20% lower than primary), and extended operating temperature range to 125°C. Both parts are RoHS3 compliant and carry MSL 1 rating, ensuring compatibility with standard PCB assembly processes. The substitute maintains identical physical footprint and inductance specification, enabling direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-5R6ML directly replace the CD43NP-5R6MC on existing PCBs?

A: Yes. Both parts share identical physical dimensions (4.50 × 4.00 × 3.50 mm), surface mount configuration, and inductance value (5.6 µH ±20%). No PCB layout changes are required.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The SDR0403-5R6ML has 100 mOhm maximum DCR compared to 125.7 mOhm in the CD43NP-5R6MC. Lower DCR reduces resistive power dissipation (I²R losses), resulting in lower operating temperature and improved efficiency in current-carrying applications.

Q: Are both parts suitable for the same temperature range applications?

A: The CD43NP-5R6MC operates from -40°C to 100°C. The SDR0403-5R6ML extends this range to -40°C to 125°C. For applications requiring operation above 100°C, only the Bourns substitute is suitable. For applications within -40°C to 100°C, both parts are compatible.

Q: Do both parts meet the same environmental compliance standards?

A: Yes. Both the CD43NP-5R6MC and SDR0403-5R6ML are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. They are suitable for identical manufacturing and storage environments.

Q: What is the current rating difference, and does it affect substitution?

A: The CD43NP-5R6MC is rated for 1.48 A; the SDR0403-5R6ML is rated for 1.6 A. The substitute's higher rating ensures it can handle the primary part's maximum current with additional margin. This is a compatible substitution characteristic.

Q: Are there any differences in core construction between these parts?

A: The CD43NP-5R6MC uses ferrite core construction. The SDR0403-5R6ML uses ferrite drum core with wirewound construction. Both are unshielded ferrite designs with equivalent electromagnetic properties for the specified 5.6 µH inductance and tolerance.

Q: Can these parts be used interchangeably in high-frequency filtering applications?

A: Both parts are specified for surface mount applications with ferrite cores. The SDR0403-5R6ML provides additional performance data (Q @ 7.96 MHz = 28, Self Resonant Frequency = 45 MHz), which may be relevant for high-frequency circuit analysis. For applications where these parameters are critical, the substitute's documented specifications should be evaluated against circuit requirements.