PM20-R22M Equivalent & Substitute Parts

Part Overview

The PM20-R22M is a 220 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 320mOhm. This component operates across -55°C to 125°C and is packaged in the 1210 (3225 Metric) surface mount form factor. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and production requirements.

Substiute Parts

PM20-R22M

Bourns Inc.In Stock: 1243PM20-R22M Datasheet

Current PartRFQ

CM322522-R22KL

Bourns Inc.In Stock: 877CM322522-R22KL Datasheet

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CM322522-R22ML

Bourns Inc.In Stock: 1053CM322522-R22ML Datasheet

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1210-221K

API Delevan Inc.In Stock: 14521210-221K Datasheet

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744764002

Würth ElektronikIn Stock: 2410744764002 Datasheet

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AISM-1210-R22M-T

Abracon LLCIn Stock: 8978AISM-1210-R22M-T Datasheet

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IMC1210EBR22M

Vishay DaleIn Stock: 1142IMC1210EBR22M Datasheet

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IMC1210ERR22M

Vishay DaleIn Stock: 1050IMC1210ERR22M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

• Inductance Value: Must be 220 nH
• Package / Case: Must be 1210 (3225 Metric) surface mount
• Current Rating: Must meet or exceed 450 mA
• DC Resistance: Must not exceed 320mOhm maximum
• Shielding: Must be unshielded
• Physical Dimensions: Must accommodate 0.126" L x 0.098" W (3.20mm x 2.50mm) footprint with height ≤ 0.087" (2.20mm) seated maximum

All substitute parts listed meet these core electrical and mechanical parameters. Variations in core material type, inductor construction (molded vs. drum core wirewound), tolerance, and operating temperature range are secondary considerations that do not prevent functional substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility)

744764002 (Würth Elektronik) and AISM-1210-R22M-T (Abracon LLC) provide the closest functional match to PM20-R22M. Both maintain 450 mA current rating, 320mOhm maximum DC resistance, and 220 nH inductance. Both are ROHS3 compliant and active products. The 744764002 offers extended temperature range to -40°C and maintains the full -55°C to 125°C operating window through its active status. AISM-1210-R22M-T is molded construction matching the original design approach.

Alternative Substitutes (Acceptable with Design Review)

IMC1210EBR22M and IMC1210ERR22M (Vishay Dale) exceed current rating at 484 mA and maintain identical DC resistance and inductance specifications. Both support the full -55°C to 125°C temperature range and are ROHS3 compliant. These parts use iron powder core construction rather than ferrite, which may affect frequency response characteristics in specific applications.

1210-221K (API Delevan Inc.) provides significantly higher current capacity at 805 mA with matching DC resistance and inductance. However, it uses iron core material and is RoHS non-compliant, limiting suitability for regulated applications.

CM322522-R22KL and CM322522-R22ML (Bourns Inc.) maintain ferrite core construction and are ROHS3 compliant but operate at reduced current rating (360 mA) and lower DC resistance (290mOhm). These are suitable only where current requirements do not exceed 360 mA.

Frequently Asked Questions (FAQ)

Q: Can CM322522-R22KL or CM322522-R22ML replace PM20-R22M in all applications?

A: These parts are functionally compatible for inductance and package, but the 360 mA current rating is below the original 450 mA specification. Use only in designs where actual current draw does not exceed 360 mA.

Q: What is the difference between 744764002 and AISM-1210-R22M-T?

A: Both maintain identical electrical specifications (220 nH, 450 mA, 320mOhm). The primary difference is core construction: 744764002 uses drum core wirewound design while AISM-1210-R22M-T uses molded construction. The molded design (AISM-1210-R22M-T) more closely matches the original PM20-R22M construction approach.

Q: Are IMC1210EBR22M and IMC1210ERR22M interchangeable?

A: Yes. Both are identical electrically and mechanically. The difference is packaging: IMC1210EBR22M is supplied in bulk, while IMC1210ERR22M is supplied in tape and reel format.

Q: Why do some substitutes have lower current ratings than PM20-R22M?

A: CM322522 series parts (360 mA) use different core materials and construction methods that result in lower saturation current. These are suitable only for applications where the 360 mA rating meets design requirements.

Q: What is the impact of core material differences (ferrite vs. iron vs. iron powder)?

A: Core material affects frequency response, Q factor, and self-resonant frequency. Ferrite cores (PM20-R22M, 744764002, CM322522 series) provide higher Q and self-resonant frequency. Iron and iron powder cores (1210-221K, IMC series) provide different frequency characteristics. Selection depends on circuit frequency requirements.

Q: Is RoHS compliance required for my application?

A: If RoHS compliance is mandatory, avoid PM20-R22M (obsolete, non-compliant) and 1210-221K (non-compliant). Select from ROHS3 compliant alternatives: 744764002, AISM-1210-R22M-T, IMC1210EBR22M, IMC1210ERR22M, or CM322522 series.

Q: Can I use 1210-221K as a direct replacement?

A: 1210-221K meets inductance, package, and DC resistance specifications with superior current capacity (805 mA). However, it uses iron core construction and is RoHS non-compliant. Use only if core material compatibility is verified and RoHS compliance is not required.