PM20-R12M Equivalent & Substitute Parts Reference

Part Overview

The PM20-R12M is a 120 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 220mOhm. This surface mount component in 1210 (3225 Metric) package is designed for high-frequency applications at 25.2 MHz. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

PM20-R12M

Bourns Inc.In Stock: 1076PM20-R12M Datasheet

Current PartRFQ

CM453232-102KL

Bourns Inc.In Stock: 1687CM453232-102KL Datasheet

DirectRFQ

CM322522-R12ML

Bourns Inc.In Stock: 821CM322522-R12ML Datasheet

SimilarRFQ

1210-121K

API Delevan Inc.In Stock: 11321210-121K Datasheet

SimilarRFQ

AISM-1210-R12M-T

Abracon LLCIn Stock: 868AISM-1210-R12M-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PM20-R12M is determined by the following critical parameters: inductance value (120 nH), current rating capability, DC resistance (220mOhm Max), package form factor (1210 / 3225 Metric), and operating frequency (25.2 MHz). Substitute parts must maintain these electrical specifications within acceptable tolerances to ensure functional equivalence in the target application.

The substitute parts are grouped into two categories:

Direct Equivalent (Identical Electrical Specifications): AISM-1210-R12M-T from Abracon LLC matches the PM20-R12M across all critical parameters: 120 nH inductance, 450 mA current rating, 220mOhm DCR, and 1210 package form factor.

Similar Equivalent (Matching Core Specifications with Parameter Variations): CM322522-R12ML and 1210-121K provide the same inductance and package dimensions but with different current ratings and DCR characteristics. These parts are suitable where the application can tolerate reduced current capacity or alternative core materials.

Non-Equivalent (Different Inductance Value): CM453232-102KL is listed in the original substitute list but operates at 1 mH inductance with significantly different electrical characteristics and is not suitable as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

AISM-1210-R12M-T (Abracon LLC) is the primary substitute for the PM20-R12M. This part provides identical electrical specifications across inductance, current rating, and DC resistance. The component is in active production status with ROHS3 compliance. The operating temperature range is reduced to -40°C ~ 85°C compared to the original -55°C ~ 125°C specification; applications requiring the full original temperature range must account for this limitation.

1210-121K (API Delevan Inc.) is a secondary substitute suitable for applications where increased current capacity is beneficial. This part maintains the 120 nH inductance, 220mOhm DCR, and full -55°C ~ 125°C operating temperature range. The ±10% inductance tolerance provides tighter specification than the original ±20%. However, this part is RoHS non-compliant, matching the original part's compliance status.

CM322522-R12ML (Bourns Inc.) is suitable only for applications with reduced current requirements (240 mA maximum versus 450 mA). The elevated DC resistance of 670mOhm Max and nonstandard package form factor limit its applicability. This part is ROHS3 compliant and maintains the -40°C ~ 125°C operating range.

CM453232-102KL operates at 1 mH inductance and is not suitable as a substitute for the 120 nH PM20-R12M application.

Frequently Asked Questions (FAQ)

Q: Can AISM-1210-R12M-T directly replace PM20-R12M in all applications?

A: AISM-1210-R12M-T provides electrical equivalence for inductance, current rating, and DC resistance. The reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) must be evaluated against application requirements. For applications operating within the AISM temperature range, direct substitution is valid.

Q: What is the difference between the molded and drum core construction types?

A: PM20-R12M uses molded construction, while CM322522-R12ML uses drum core wirewound construction. Both are unshielded ferrite core inductors with identical inductance values. The construction difference affects DC resistance and current handling characteristics but does not impact frequency response at 25.2 MHz test frequency.

Q: Why does 1210-121K have higher current rating than PM20-R12M?

A: 1210-121K uses iron core material versus the ferrite core in PM20-R12M. Iron core construction provides superior current handling capacity (971 mA versus 450 mA) while maintaining the same inductance and DC resistance specifications.

Q: Is package compatibility guaranteed between PM20-R12M and substitute parts?

A: PM20-R12M, AISM-1210-R12M-T, and 1210-121K all use the 1210 (3225 Metric) package form factor with identical footprint dimensions (0.126" L x 0.098" W / 3.20mm x 2.50mm). CM322522-R12ML uses a nonstandard package and requires PCB layout verification before substitution.

Q: What compliance considerations apply when substituting PM20-R12M?

A: PM20-R12M is RoHS non-compliant. AISM-1210-R12M-T and CM322522-R12ML are ROHS3 compliant, while 1210-121K is RoHS non-compliant. Applications with RoHS compliance requirements must use AISM-1210-R12M-T or CM322522-R12ML. All substitute parts maintain REACH Unaffected and EAR99 ECCN status matching the original part.