PM20S-2R2K Equivalent & Substitute Parts

Part Overview

The PM20S-2R2K is a 2.2 µH shielded molded inductor manufactured by Bourns Inc., rated for 320 mA with a maximum DC resistance of 900mOhm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part is housed in a 1210 (3225 Metric) surface mount package and operates across the temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Inductance Tolerance	±10%
Current Rating	320 mA
DC Resistance (DCR)	900mOhm Max
Shielding	Shielded
Package / Case	1210 (3225 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Q @ Frequency	30 @ 7.96MHz
Self Resonant Frequency	65MHz

Substitute Part Grouping Explanation

Substitution for the PM20S-2R2K is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance value: 2.2 µH (exact match required)
Current rating: minimum 320 mA
DC resistance: maximum 900mOhm
Shielding: shielded configuration
Package: 1210 (3225 Metric) surface mount
Operating temperature range: -55°C to 125°C minimum

Substitute Parts Identified:

Group 1: Direct Electrical & Mechanical Equivalents (Shielded, 320 mA Rating)

ISC1210SY2R2K (Vishay Dale, Iron Powder Core, Active)
ISC1210BN2R2K (Vishay Dale, Iron Powder Core, Active)
ISC1210EB2R2K (Vishay Dale, Iron Powder Core, Active)

Group 2: Enhanced Current Rating (Shielded, 470 mA Rating)

S1210-222K (API Delevan Inc., Ferrite Core, Active)

Group 3: Reduced Current Rating (Unshielded, 190 mA Rating)

CM322522-2R2KL (Bourns Inc., Ferrite Core, Active)
CM322522-2R2JL (Bourns Inc., Ferrite Core, Active)

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (mOhm Max)	Shielding	Core Material	Package	Status	RoHS
PM20S-2R2K	Bourns Inc.	2.2 µH	±10%	320	900	Shielded	Ferrite	1210	Obsolete	Non-compliant
ISC1210SY2R2K	Vishay Dale	2.2 µH	±10%	320	900	Shielded	Iron Powder	1210	Active	Non-compliant
ISC1210BN2R2K	Vishay Dale	2.2 µH	±10%	320	900	Shielded	Iron Powder	1210	Active	Non-compliant
ISC1210EB2R2K	Vishay Dale	2.2 µH	±10%	320	900	Shielded	Iron Powder	1210	Active	ROHS3 Compliant
S1210-222K	API Delevan Inc.	2.2 µH	±10%	470	730	Shielded	Ferrite	1210	Active	Non-compliant
CM322522-2R2KL	Bourns Inc.	2.2 µH	±10%	190	950	Unshielded	Ferrite	Nonstandard	Active	ROHS3 Compliant
CM322522-2R2JL	Bourns Inc.	2.2 µH	±5%	190	950	Unshielded	Ferrite	Nonstandard	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical & Mechanical Performance):

ISC1210EB2R2K is the preferred substitute. It maintains all critical parameters of the PM20S-2R2K (2.2 µH, 320 mA, 900mOhm DCR, shielded, 1210 package, -55°C to 125°C) while offering ROHS3 compliance and active product status. The iron powder core construction provides equivalent performance to the original ferrite core design.

ISC1210SY2R2K and ISC1210BN2R2K are functionally equivalent alternatives from Vishay Dale with identical electrical specifications and active status. Both are available in higher inventory quantities (752 and 709 units respectively).

For Enhanced Current Capability:

S1210-222K from API Delevan Inc. provides a higher current rating of 470 mA with improved DC resistance of 730mOhm, maintaining shielding and the 1210 package. This part is suitable for applications requiring additional current headroom while preserving the 2.2 µH inductance value.

For RoHS3 Compliance with Trade-offs:

CM322522-2R2KL offers ROHS3 compliance and active status but operates at reduced current rating (190 mA) and features unshielded construction. This part is suitable only for applications where the lower current rating is acceptable and electromagnetic shielding is not required.

Frequently Asked Questions (FAQ)

Q: Can ISC1210EB2R2K directly replace PM20S-2R2K in my circuit?

A: Yes. ISC1210EB2R2K maintains identical inductance (2.2 µH), current rating (320 mA), DC resistance (900mOhm), shielding, package (1210), and operating temperature range (-55°C to 125°C). The iron powder core material is functionally equivalent to the original ferrite core for this application class.

Q: What is the difference between the Vishay Dale ISC1210 variants (SY, BN, EB)?

A: All three variants (ISC1210SY2R2K, ISC1210BN2R2K, ISC1210EB2R2K) share identical electrical specifications and package. The primary difference is packaging format (Tape & Reel for SY, Bulk for BN and EB) and RoHS compliance status (EB is ROHS3 compliant; SY and BN are non-compliant).

Q: Why is S1210-222K listed as a substitute if it has different current and DCR ratings?

A: S1210-222K is a functional substitute for applications where higher current capability is beneficial. It maintains the 2.2 µH inductance, shielded configuration, 1210 package, and operating temperature range. The 470 mA rating and 730mOhm DCR represent improved performance characteristics suitable for higher-power designs.

Q: Can I use CM322522-2R2KL as a substitute?

A: CM322522-2R2KL is a functional substitute only if your application can tolerate reduced current rating (190 mA vs. 320 mA) and unshielded construction. It offers ROHS3 compliance and active product status. The nonstandard package may require PCB layout verification.

Q: What is the impact of core material differences (Ferrite vs. Iron Powder)?

A: Both ferrite and iron powder cores are acceptable for 2.2 µH inductors at these current levels. Iron powder cores (Vishay Dale ISC1210 series) typically exhibit lower Q factors but provide stable inductance across temperature and frequency ranges. Ferrite cores (Bourns PM20S, API Delevan S1210) offer higher Q factors. Selection depends on circuit requirements for frequency response and temperature stability.

Q: Are there inventory considerations for these substitutes?

A: Yes. PM20S-2R2K (694 units), ISC1210SY2R2K (752 units), ISC1210EB2R2K (1040 units), and S1210-222K (3300 units) are currently in stock. CM322522-2R2KL has the highest inventory (9069 units). Availability should be confirmed with your supplier for production quantities.

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