PM105-680K Equivalent & Substitute Parts

Part Overview

The PM105-680K is a 68 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.11 A with 220mOhm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across -30°C to 100°C and is mounted as a surface mount nonstandard package component.

Key Parameters

Parameter	Value
Inductance	68 µH
Tolerance	±10%
Current Rating	1.11 A
DC Resistance (DCR)	220mOhm
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Surface Mount
Operating Temperature	-30°C ~ 100°C
Self Resonant Frequency	9 MHz
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PM105-680K is determined by the following critical parameters: inductance value (68 µH), tolerance (±10%), current rating (minimum 1.11 A), DC resistance (220mOhm specification), core material (ferrite), shielding type (unshielded), and mounting configuration (surface mount). Parts meeting these electrical and mechanical criteria are classified as direct substitutes. The PM105-680K-RC and SDR1006-680KL meet all primary electrical specifications and physical dimensions. The CD105NP-680KC, manufactured by Sumida America Components Inc., provides equivalent electrical performance with minor dimensional variations. The CM322522-560JL is classified as a similar part due to reduced inductance (56 µH) and significantly lower current rating (70 mA), making it unsuitable for direct substitution in applications requiring the full 1.11 A rating.

Parameter Comparison

Parameter	PM105-680K	PM105-680K-RC	SDR1006-680KL	CD105NP-680KC	CM322522-560JL
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.	Sumida America Components Inc.	Bourns Inc.
Inductance	68 µH	68 µH	68 µH	68 µH	56 µH
Tolerance	±10%	±10%	±10%	±10%	±5%
Current Rating (Amps)	1.11 A	1.1 A	1.1 A	1.11 A	70 mA
DC Resistance	220mOhm	220mOhm	220mOhm Max	220mOhm Max	8Ohm Max
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Operating Temperature	-30°C ~ 100°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 100°C	-40°C ~ 125°C
Self Resonant Frequency	9 MHz	7 MHz	7 MHz	9.26 MHz	15 MHz
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Size (L x W)	9.80mm x 9.80mm	9.80mm x 9.80mm	9.80mm x 9.80mm	10.00mm x 9.00mm	3.20mm x 2.50mm
Height (Max)	5.80mm	5.80mm	5.80mm	5.80mm	2.20mm

Engineering Selection Recommendations

PM105-680K-RC and SDR1006-680KL are the primary direct substitutes for the obsolete PM105-680K. Both parts maintain identical inductance (68 µH), tolerance (±10%), current rating (1.1 A), and DC resistance (220mOhm) specifications. Both are ROHS3 compliant and available in active production status with tape and reel packaging. SDR1006-680KL offers higher inventory availability (5141 pcs) compared to PM105-680K-RC (1042 pcs). Both parts support extended operating temperature ranges (-40°C to 125°C) beyond the original specification.

CD105NP-680KC, manufactured by Sumida America Components Inc., provides equivalent electrical performance with matching inductance, tolerance, current rating, and DC resistance. This part is ROHS3 compliant and active in production. Dimensional variations exist: CD105NP-680KC measures 10.00mm x 9.00mm versus the standard 9.80mm x 9.80mm footprint. This part is suitable for applications where the slightly larger length dimension is accommodated in the PCB layout.

CM322522-560JL is not recommended as a direct substitute due to reduced inductance (56 µH versus 68 µH) and significantly lower current rating (70 mA versus 1.11 A). This part is suitable only for applications with different inductance and current requirements.

Frequently Asked Questions (FAQ)

Q: Can PM105-680K-RC directly replace PM105-680K in existing designs? A: Yes. PM105-680K-RC maintains identical electrical specifications (68 µH, ±10% tolerance, 1.1 A rating, 220mOhm DCR) and physical dimensions (9.80mm x 9.80mm x 5.80mm). The part is ROHS3 compliant and in active production.

Q: What is the difference between PM105-680K-RC and SDR1006-680KL? A: Both parts meet the same electrical specifications. SDR1006-680KL is from the SDR1006 series with higher inventory availability. PM105-680K-RC maintains the PM105 series designation. Selection between these parts depends on procurement availability and supply chain preferences.

Q: Is CD105NP-680KC compatible with the original PM105-680K? A: CD105NP-680KC provides equivalent electrical performance with matching inductance, tolerance, current rating, and DC resistance. The footprint is slightly larger (10.00mm x 9.00mm versus 9.80mm x 9.80mm). Compatibility depends on PCB layout constraints. Verify that the additional 0.2mm length dimension does not conflict with component placement.

Q: Why is CM322522-560JL listed as a similar part rather than a direct substitute? A: CM322522-560JL has reduced inductance (56 µH) and significantly lower current rating (70 mA). These parameters do not meet the electrical requirements of the original PM105-680K specification. This part is suitable only for applications with different inductance and current specifications.

Q: What compliance improvements are available with substitute parts? A: PM105-680K-RC, SDR1006-680KL, and CD105NP-680KC are all ROHS3 compliant, whereas the original PM105-680K is RoHS non-compliant. Substitute parts also support extended operating temperature ranges (-40°C to 125°C) compared to the original (-30°C to 100°C).

Q: Are there packaging format differences between substitute parts? A: The original PM105-680K is supplied in bulk packaging. All substitute parts (PM105-680K-RC, SDR1006-680KL, CD105NP-680KC) are supplied in tape and reel (TR) format, which is standard for automated assembly processes.

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