PM20-R82M Equivalent & Substitute Parts

Part Overview

The PM20-R82M is an 820 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 650 mOhm. This component operates across the temperature range of -55°C to 125°C in a 1210 (3225 Metric) surface mount package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines that maintain the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Inductance	820 nH
Inductance Tolerance	±20%
Current Rating	450 mA
DC Resistance (Max)	650 mOhm
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Q @ Frequency	28 @ 25.2 MHz
Self Resonant Frequency	140 MHz

Substitute Part Grouping Explanation

Substitution of the PM20-R82M is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance value: 820 nH (exact match required)
Package / Case: 1210 (3225 Metric) surface mount form factor
Current Rating: minimum 450 mA
DC Resistance: maximum 650 mOhm
Shielding: Unshielded configuration
Operating Temperature: minimum range -55°C to 125°C

Acceptable Variations:

Inductance Tolerance: ±10% or ±20% acceptable
Core Material: Ferrite, Iron, or Iron Powder
Construction Type: Molded, Drum Core Wirewound
Product Status: Active preferred; obsolete acceptable if specifications match

Substitute parts are grouped based on adherence to these parameters. Parts meeting all primary criteria are direct functional equivalents regardless of manufacturer or construction method.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR Max (mOhm)	Package	Core Material	Type	Temp Range	Product Status	RoHS Status
PM20-R82M	Bourns Inc.	820 nH	±20%	450	650	1210	Ferrite	Molded	-55 ~ 125°C	Obsolete	RoHS non-compliant
AISM-1210-R82M-T	Abracon LLC	820 nH	±20%	450	650	1210	Ferrite	Molded	-40 ~ 85°C	Active	ROHS3 Compliant
IMC1210ERR82M	Vishay Dale	820 nH	±20%	450	670	1210	Iron Powder	Drum Core, Wirewound	-55 ~ 125°C	Active	ROHS3 Compliant
IMC1210EBR82M	Vishay Dale	820 nH	±20%	450	670	1210	Iron Powder	Drum Core, Wirewound	-55 ~ 125°C	Active	ROHS3 Compliant
1210-821K	API Delevan Inc.	820 nH	±10%	556	670	1210	Iron	-	-55 ~ 125°C	Active	RoHS non-compliant
CM322522-R82ML	Bourns Inc.	820 nH	±20%	245	610	Nonstandard	Ferrite	Drum Core, Wirewound	-40 ~ 125°C	Active	ROHS3 Compliant
CM322522-R82KL	Bourns Inc.	820 nH	±10%	245	610	Nonstandard	Ferrite	Drum Core, Wirewound	-40 ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (1210 Package, 450 mA Rating):

AISM-1210-R82M-T (Abracon LLC) and IMC1210ERR82M / IMC1210EBR82M (Vishay Dale) are functionally equivalent to PM20-R82M. All three maintain 820 nH inductance, ±20% tolerance, 450 mA current rating, and 1210 package form factor. AISM-1210-R82M-T and Vishay Dale parts are active products with ROHS3 compliance, addressing the obsolescence of the original PM20-R82M. The Vishay Dale variants offer extended temperature range matching the original (-55°C to 125°C) and are available in both tape & reel and bulk packaging.

Higher Current Rating Alternative:

1210-821K (API Delevan Inc.) provides 556 mA current rating with identical 820 nH inductance and 1210 package. This part is suitable for applications requiring higher current capacity while maintaining the same inductance specification. Operating temperature range matches the original (-55°C to 125°C). RoHS non-compliance status matches the original PM20-R82M.

Limited Substitution (Nonstandard Package):

CM322522-R82ML and CM322522-R82KL (Bourns Inc.) maintain 820 nH inductance and ferrite core construction but feature nonstandard packaging and reduced current rating (245 mA). These parts are not suitable for direct replacement in applications requiring 450 mA current capacity or standard 1210 package footprint.

Frequently Asked Questions (FAQ)

Q: Can AISM-1210-R82M-T directly replace PM20-R82M?

A: Yes. Both parts share identical electrical specifications: 820 nH inductance, ±20% tolerance, 450 mA current rating, 650 mOhm maximum DC resistance, and 1210 package form factor. AISM-1210-R82M-T is an active product with ROHS3 compliance. Operating temperature range differs (-40°C to 85°C versus -55°C to 125°C); verify application requirements before substitution.

Q: What is the difference between IMC1210ERR82M and IMC1210EBR82M?

A: Both parts are electrically and mechanically identical. IMC1210ERR82M is supplied in tape & reel packaging; IMC1210EBR82M is supplied in bulk packaging. Selection depends on procurement and assembly requirements.

Q: Why are CM322522-R82ML and CM322522-R82KL not recommended as direct replacements?

A: These parts feature nonstandard packaging and reduced current rating (245 mA versus 450 mA). They are not suitable for applications requiring the full 450 mA current capacity or standard 1210 package footprint compatibility.

Q: Can 1210-821K be used instead of PM20-R82M?

A: 1210-821K maintains 820 nH inductance and 1210 package compatibility with higher current rating (556 mA). It is suitable for applications where increased current capacity is acceptable. Verify core material (Iron versus Ferrite) compatibility with circuit requirements.

Q: What compliance considerations apply to substitute selection?

A: AISM-1210-R82M-T, IMC1210ERR82M, and IMC1210EBR82M are ROHS3 compliant. 1210-821K and the original PM20-R82M are RoHS non-compliant. Select based on end-product compliance requirements.

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