PM20-100K Equivalent & Substitute Parts

Part Overview

The PM20-100K is a 10 µH unshielded molded inductor manufactured by Bourns Inc., rated for 150 mA with a maximum DC resistance of 2.5Ohm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -55°C to 125°C and is housed in a 1210 (3225 Metric) surface mount package.

Key Parameters

Parameter	Value
Inductance	10 µH
Inductance Tolerance	±10%
Current Rating	150 mA
DC Resistance (Max)	2.5Ohm
Core Material	Ferrite
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Q @ Frequency	30 @ 2.52MHz
Self Resonant Frequency	36MHz

Substitute Part Grouping Explanation

Substitution eligibility for the PM20-100K is determined by the following critical parameters:

Inductance Value: Must be 10 µH
Inductance Tolerance: ±10% or tighter
Current Rating: Minimum 150 mA
DC Resistance: Maximum 2.5Ohm
Core Material: Ferrite
Shielding: Unshielded
Package / Case: 1210 (3225 Metric) or equivalent footprint
Mounting Type: Surface Mount
Operating Temperature Range: Must support -55°C to 125°C or equivalent

Substitute parts are classified into two categories:

Direct Substitutes (CM322522-100JL, CM322522-100KL): Meet all critical electrical parameters with identical inductance, core material, and package footprint. These parts are manufactured by Bourns Inc. and maintain functional equivalence.

Similar Substitutes (1210-103J, 74476410): Meet core electrical specifications with minor variations in current rating, DC resistance, or operating temperature range. These parts are from alternative manufacturers (API Delevan Inc., Würth Elektronik) and maintain the same package footprint and inductance value.

Parameter Comparison

Parameter	PM20-100K	CM322522-100JL	CM322522-100KL	1210-103J	74476410
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.	API Delevan Inc.	Würth Elektronik
Inductance	10 µH	10 µH	10 µH	10 µH	10 µH
Inductance Tolerance	±10%	±5%	±10%	±5%	±10%
Current Rating (mA)	150	140	140	297	150
DC Resistance (Max, Ohm)	2.5	2.1	2.1	2.1	2.1
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Package / Case	1210 (3225 Metric)	Nonstandard	Nonstandard	1210 (3225 Metric)	1210 (3225 Metric)
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 105°C
Q @ Frequency	30 @ 2.52MHz	30 @ 2.52MHz	30 @ 2.52MHz	30 @ 7.9MHz	30 @ 2.52MHz
Self Resonant Frequency	36MHz	36MHz	36MHz	30MHz	32MHz
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For RoHS3 Compliant Designs: CM322522-100JL and CM322522-100KL are the preferred direct substitutes. Both parts are manufactured by Bourns Inc. and maintain active product status with full RoHS3 compliance. CM322522-100JL offers tighter inductance tolerance (±5%) compared to the original PM20-100K (±10%). Both variants are available in high inventory quantities.

For Extended Temperature Range (-55°C): The 1210-103J from API Delevan Inc. maintains the full -55°C to 125°C operating range of the original part. This part is suitable for applications requiring the complete temperature specification of the PM20-100K.

For Current Margin: The 1210-103J provides the highest current rating at 297 mA, offering significant headroom above the original 150 mA specification. The 74476410 from Würth Elektronik matches the original current rating exactly at 150 mA.

For Compliance Trade-offs: The CM322522 series (both variants) provide superior regulatory compliance (ROHS3) but operate at a reduced lower temperature limit (-40°C versus -55°C). Applications operating above -40°C can adopt these parts without thermal constraints.

Frequently Asked Questions (FAQ)

Q: Can CM322522-100JL replace PM20-100K in all applications?

A: CM322522-100JL is electrically compatible for inductance, current rating, and DC resistance. However, the operating temperature range is limited to -40°C to 125°C compared to the original -55°C to 125°C. Verify that your application does not require operation below -40°C. The part also has a higher moisture sensitivity level (MSL 3 versus MSL 1), requiring controlled storage conditions.

Q: What is the difference between CM322522-100JL and CM322522-100KL?

A: Both parts are identical in electrical performance and physical dimensions. The primary difference is packaging: CM322522-100JL is supplied in Tape & Reel (TR) format, while CM322522-100KL is supplied in Cut Tape (CT) & Digi-Reel format. CM322522-100JL also offers tighter inductance tolerance (±5% versus ±10%).

Q: Why do the CM322522 parts list "Nonstandard" for Package / Case?

A: Despite the nonstandard package designation, the CM322522 series maintains identical physical dimensions (0.126" L x 0.098" W, 3.20mm x 2.50mm) and height (0.087", 2.20mm) to the 1210 (3225 Metric) footprint. These parts are mechanically compatible with standard 1210 PCB layouts.

Q: Is 1210-103J suitable as a direct replacement?

A: The 1210-103J is mechanically and electrically compatible with the PM20-100K. It maintains the full -55°C to 125°C temperature range and provides higher current capacity (297 mA). However, it is not RoHS3 compliant and operates at a different test frequency (7.9MHz versus 2.52MHz), which may affect Q factor performance in specific circuit applications.

Q: Which substitute offers the best compliance profile?

A: The 74476410 from Würth Elektronik provides ROHS3 compliance with matching current rating (150 mA) and identical test frequency (2.52MHz). The primary trade-off is a reduced lower operating temperature limit (-40°C versus -55°C).

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