CD105NP-181KC Equivalent & Substitute Parts

Part Overview

The CD105NP-181KC is a 180 µH unshielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring 720 mA current handling capability with a maximum DC resistance of 630mOhm. The 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 specifications and mechanical compatibility are maintained across the same functional category, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Inductance	180	µH
Inductance Tolerance	±10	%
Current Rating	720	mA
DC Resistance (Max)	630	mOhm
Shielding Type	Unshielded	-
Core Material	Ferrite	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-40 to 100	°C
Package Type	Nonstandard	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the CD105NP-181KC is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Inductance value: 180 µH at 1 kHz test frequency
Inductance tolerance: ±10%
Current rating: 720 mA minimum
DC resistance: 630mOhm maximum
Core material: Ferrite
Shielding configuration: Unshielded

Mechanical Equivalence Criteria:

Mounting type: Surface Mount
Package classification: Nonstandard
Height seated maximum: 5.80mm (0.228")
Footprint compatibility within nonstandard package dimensions

Compliance Criteria:

RoHS3 compliance required
Moisture Sensitivity Level: 1 (Unlimited)
ECCN classification: EAR99

The SDR1006-181KL from Bourns Inc. meets all specified electrical and mechanical parameters for direct substitution with the CD105NP-181KC.

Parameter Comparison

Parameter	CD105NP-181KC (Sumida)	SDR1006-181KL (Bourns)	Match Status
Inductance	180 µH	180 µH	Equivalent
Inductance Tolerance	±10%	±10%	Equivalent
Current Rating	720 mA	720 mA	Equivalent
DC Resistance (Max)	630 mOhm	630 mOhm	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Height - Seated (Max)	5.80 mm	5.80 mm	Equivalent
Operating Temperature Range	-40 to 100°C	-40 to 125°C	Compatible
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
ECCN	EAR99	EAR99	Equivalent

Engineering Selection Recommendations

Both the CD105NP-181KC and SDR1006-181KL are classified as Active product status components with full ROHS3 compliance and EAR99 export classification. Selection between these parts is based on availability and supply chain requirements rather than technical performance differentiation.

The SDR1006-181KL provides an extended operating temperature range to 125°C compared to the CD105NP-181KC maximum of 100°C, offering additional thermal margin in applications approaching the upper temperature limit. Both components maintain identical electrical specifications and mechanical footprint compatibility.

Component selection should prioritize availability from authorized distributors and lead time requirements, as electrical and compliance parameters are fully equivalent.

Frequently Asked Questions (FAQ)

Q: Can the SDR1006-181KL replace the CD105NP-181KC in existing designs?

A: Yes. The SDR1006-181KL meets all electrical specifications (180 µH ±10%, 720 mA, 630mOhm DCR) and mechanical requirements (5.80mm height, nonstandard package, surface mount) of the CD105NP-181KC. Both components are ROHS3 compliant with identical MSL ratings.

Q: What are the key differences between these two inductors?

A: The primary differences are manufacturer (Sumida vs. Bourns) and operating temperature range. The SDR1006-181KL operates to 125°C versus 100°C for the CD105NP-181KC. The SDR1006-181KL also specifies saturation current (1.3A) and Q factor (12 @ 796kHz), which are not provided for the CD105NP-181KC.

Q: Are the physical dimensions identical?

A: The seated height is identical at 5.80mm. Lateral dimensions differ slightly: CD105NP-181KC is 10.00mm L x 9.00mm W, while SDR1006-181KL is 9.80mm L x 9.80mm W. Both are classified as nonstandard packages and are surface mount compatible.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the CD105NP-181KC and SDR1006-181KL carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Which part should be selected for new designs?

A: Selection is based on procurement availability and supply chain factors. Both parts are functionally equivalent for applications within the -40°C to 100°C range. For applications requiring operation above 100°C, the SDR1006-181KL is suitable to 125°C.

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