CD43NP-120MC Equivalent & Substitute Parts

Part Overview

The CD43NP-120MC is a 12 µH fixed unshielded inductor manufactured by Sumida America Components Inc., rated for 970 mA continuous current with a maximum DC resistance of 210mOhm. This ferrite core surface mount component operates across the temperature range of -40°C to 100°C and is classified as Active product status with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain discontinuity, or design flexibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	12	µH
Inductance Tolerance	±20%	-
Current Rating	970	mA
DC Resistance (DCR) Maximum	210	mOhm
Shielding	Unshielded	-
Operating Temperature Range	-40°C to 100°C	-
Mounting Type	Surface Mount	-
Package Size	4.50mm x 4.00mm x 3.50mm	L x W x H
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the CD43NP-120MC is determined by the following critical parameters:

Primary Electrical Criteria:

Inductance value: 12 µH (tolerance range ±20% acceptable)
Current rating: minimum 970 mA continuous
DC resistance: maximum 210mOhm
Unshielded configuration required

Mechanical Criteria:

Surface mount technology
Package footprint: 4.50mm x 4.00mm maximum length and width
Height seated maximum: 3.50mm
Tape & Reel packaging format

Compliance Criteria:

ROHS3 compliance mandatory
Moisture Sensitivity Level 1 (Unlimited)
Operating temperature range: minimum -40°C to 100°C

The identified substitute parts PF0580.123NLT and SDR0403-120ML meet these core requirements within the specified parameter windows, enabling direct functional replacement in circuit applications.

Parameter Comparison

Parameter	CD43NP-120MC (Main)	PF0580.123NLT (Substitute)	SDR0403-120ML (Substitute)
Manufacturer	Sumida America Components Inc.	Pulse Electronics	Bourns Inc.
Inductance	12 µH	12 µH	12 µH
Inductance Tolerance	±20%	±15%	±20%
Current Rating	970 mA	1 A	1.05 A
DC Resistance (DCR) Maximum	210 mOhm	160 mOhm	210 mOhm
Shielding	Unshielded	Unshielded	Unshielded
Operating Temperature Range	-40°C to 100°C	-40°C to 125°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Size (L x W)	4.50mm x 4.00mm	4.70mm x 4.20mm	4.50mm x 4.00mm
Height - Seated (Max)	3.50mm	3.48mm	3.50mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

CD43NP-120MC (Primary Selection) The CD43NP-120MC remains the primary component choice when available. All three parts maintain Active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply chain viability and regulatory compliance.

PF0580.123NLT (Substitute - Pulse Electronics) This substitute provides superior DC resistance performance at 160mOhm maximum, representing a 23.8% improvement over the main part specification. The extended operating temperature range to 125°C and tighter inductance tolerance of ±15% offer enhanced performance margins. Package dimensions of 4.70mm x 4.20mm require PCB layout verification for footprint compatibility, as length and width exceed the main part by 0.20mm each.

SDR0403-120ML (Substitute - Bourns Inc.) This substitute maintains identical package dimensions and DC resistance specification to the main part, providing the most direct mechanical and electrical compatibility. The higher current saturation rating of 1.6A and extended operating temperature to 125°C deliver additional design margin. The measured Q factor of 28 at 2.52MHz and self-resonant frequency of 30MHz are provided for frequency-dependent circuit analysis.

All three parts are qualified for direct substitution based on provided electrical and mechanical parameters within the specified tolerance windows.

Frequently Asked Questions (FAQ)

Q: Can PF0580.123NLT be used as a direct replacement without PCB modification? A: PF0580.123NLT has package dimensions of 4.70mm x 4.20mm compared to the main part's 4.50mm x 4.00mm. PCB footprint verification is required. The 0.20mm increase in length and width may exceed available pad spacing on existing layouts.

Q: What is the primary advantage of SDR0403-120ML over the main part? A: SDR0403-120ML maintains identical package footprint and DC resistance while providing higher current saturation (1.6A versus unspecified for main part) and extended operating temperature range to 125°C. These parameters enable operation in higher-temperature environments without circuit redesign.

Q: Are all three parts suitable for high-frequency applications? A: SDR0403-120ML provides measured frequency response data (Q @ 2.52MHz = 28, SRF = 30MHz). PF0580.123NLT and CD43NP-120MC do not include frequency-dependent parameters in provided specifications. Application-specific frequency analysis is required for circuits operating above 10 MHz.

Q: Do all substitute parts meet the same compliance requirements? A: Yes. All three parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and carry EAR99 ECCN classification. REACH status is unaffected for both substitute parts.

Q: What is the tolerance impact when substituting PF0580.123NLT? A: PF0580.123NLT has ±15% inductance tolerance versus ±20% for the main part. This represents a tighter tolerance window and does not create compatibility issues in circuits designed for ±20% tolerance.

Q: Can these parts be used interchangeably in production? A: SDR0403-120ML provides the highest interchangeability due to identical package dimensions. PF0580.123NLT requires PCB layout verification. All three parts are qualified substitutes when electrical parameters fall within circuit design specifications.

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