CD104NP-100MC Equivalent & Substitute Parts

Part Overview

The CD104NP-100MC is a 10 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring 2.38 A current rating with a maximum DC resistance of 53mOhm. The component operates across the temperature range of -40°C to 100°C and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

The CD104NP-100MC maintains Active product status with 1061 pieces in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design optimization within the specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	10	µH
Inductance Tolerance	±20%	%
Current Rating	2.38	A
DC Resistance (Max)	53	mOhm
Shielding	Unshielded	—
Frequency - Self Resonant	29.9	MHz
Operating Temperature Range	-40 to 100	°C
Mounting Type	Surface Mount	—
Package / Case	Nonstandard	—
Size (L x W)	10.00 x 9.00	mm
Height (Max)	4.50	mm
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CD104NP-100MC is determined by strict equivalence across the following critical parameters:

Inductance Value: 10 µH with ±20% tolerance is the primary electrical specification. Substitute parts must maintain this inductance value within the specified tolerance band.

Current Rating: The CD104NP-100MC is rated for 2.38 A. Substitute parts must meet or exceed this current rating to ensure safe operation without thermal stress or saturation effects.

DC Resistance: Maximum 53mOhm establishes the upper limit for resistive losses. Substitute parts with higher DC resistance values introduce additional power dissipation and heat generation.

Shielding Configuration: The unshielded design is a mechanical and electromagnetic characteristic. Substitute parts must maintain unshielded construction to preserve EMI/RFI performance in the target application.

Self Resonant Frequency: 29.9 MHz defines the upper frequency boundary for linear operation. Substitute parts must maintain comparable self resonant frequency to prevent unexpected impedance behavior at high frequencies.

Operating Temperature Range: -40°C to 100°C establishes the thermal operating envelope. Substitute parts must support this temperature range or a superset thereof.

Mounting Type and Package: Surface mount nonstandard package (10.00mm x 9.00mm x 4.50mm max height) defines physical compatibility with PCB assembly processes and board layout constraints.

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

Parameter Comparison

Parameter	CD104NP-100MC (Main)	SDR1045-100M (Substitute)	Compatibility
Manufacturer	Sumida America Components Inc.	Bourns Inc.	Different manufacturers
Inductance	10 µH	10 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	2.38 A	3.2 A	Substitute exceeds requirement
DC Resistance (Max)	53 mOhm	64 mOhm	Substitute within acceptable range
Shielding	Unshielded	Unshielded	Equivalent
Frequency - Self Resonant	29.9 MHz	27.8 MHz	Comparable
Operating Temperature Range	-40 to 100°C	-40 to 125°C	Substitute exceeds requirement
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	Nonstandard	Nonstandard	Equivalent
Size (L x W)	10.00 x 9.00 mm	10.00 x 10.00 mm	Width differs by 1.0 mm
Height (Max)	4.50 mm	4.80 mm	Height differs by 0.30 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Active	Active	Both active

Engineering Selection Recommendations

Primary Selection: The CD104NP-100MC remains the primary component choice when available. Both the main part and substitute SDR1045-100M maintain Active product status with current inventory availability, ensuring supply chain stability.

Substitute Applicability: The SDR1045-100M qualifies as a direct substitute based on electrical parameter equivalence. The substitute part exceeds the current rating requirement (3.2 A vs. 2.38 A) and extends the operating temperature range (-40°C to 125°C vs. -40°C to 100°C), providing enhanced thermal margin.

Physical Compatibility Consideration: The SDR1045-100M exhibits dimensional differences in width (10.00mm vs. 9.00mm) and height (4.80mm vs. 4.50mm). PCB layout and assembly clearance verification is required to confirm mechanical fit within the target application's spatial constraints.

DC Resistance Trade-off: The substitute part exhibits 11mOhm higher maximum DC resistance (64mOhm vs. 53mOhm). This parameter difference results in proportionally increased power dissipation. Applications with strict thermal or efficiency requirements must evaluate this trade-off against the electrical performance gains.

Compliance Verification: Both parts maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing processes and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the SDR1045-100M directly replace the CD104NP-100MC in all applications?

A: Electrical substitution is valid based on inductance, tolerance, current rating, and shielding equivalence. Physical substitution requires verification of PCB layout clearances due to dimensional differences (width +1.0mm, height +0.30mm). DC resistance increase of 11mOhm must be evaluated for thermal impact in power-sensitive applications.

Q: What is the significance of the current rating difference (2.38 A vs. 3.2 A)?

A: The substitute part's higher current rating (3.2 A) exceeds the main part's specification (2.38 A), providing additional thermal headroom and saturation margin. This represents a performance enhancement rather than a limitation for applications operating at or below 2.38 A.

Q: How does the DC resistance difference affect circuit performance?

A: The 11mOhm increase in maximum DC resistance (53mOhm to 64mOhm) results in proportionally higher resistive losses. In a 2.38 A circuit, this translates to approximately 0.063 W additional power dissipation at maximum current. Applications with strict power budget or thermal constraints must account for this difference.

Q: Are the physical dimension differences critical for PCB assembly?

A: The SDR1045-100M is 1.0mm wider and 0.30mm taller than the CD104NP-100MC. PCB layout, component placement density, and clearance to adjacent components must be verified. Assembly equipment compatibility should be confirmed with manufacturing partners.

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

A: Yes. Both the CD104NP-100MC and SDR1045-100M are RoHS3 compliant with MSL 1 (Unlimited) rating. The substitute part extends the operating temperature range to 125°C, providing additional thermal margin beyond the main part's 100°C maximum.

Q: What is the inductance tolerance impact on circuit design?

A: Both parts specify ±20% inductance tolerance. This tolerance band must be incorporated into circuit design calculations. At 10 µH nominal, the tolerance range spans 8 µH to 12 µH. Circuit performance must remain within specification across this entire range for both the main part and substitute.

Q: Can the substitute part be used in high-frequency applications?

A: Both parts exhibit comparable self resonant frequencies (29.9 MHz main vs. 27.8 MHz substitute). The substitute's slightly lower self resonant frequency may introduce minor impedance variations at frequencies approaching 27.8 MHz. Application-specific frequency response analysis is recommended for circuits operating above 20 MHz.

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