PM32-820M-RC Equivalent & Substitute Parts

Part Overview

The PM32-820M-RC is a 82 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 280 mA continuous current with a maximum DC resistance of 2.1 Ohm. This surface mount component operates across the temperature range of -40°C to 125°C and is classified as Active product status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this inductor category.

Key Parameters

Parameter	Value
Inductance	82 µH
Current Rating	280 mA
DC Resistance (DCR)	2.1 Ohm Max
Core Type	Ferrite, Drum Core, Wirewound
Shielding	Unshielded
Operating Temperature	-40°C to 125°C
Mounting Type	Surface Mount
Package Size	3.00mm L x 2.80mm W x 2.80mm H
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PM32-820M-RC is determined by the following critical parameters:

Inductance value must equal 82 µH. Current rating must support minimum 280 mA. DC resistance must not exceed 2.1 Ohm maximum. Core material must be ferrite with drum core wirewound construction. Shielding configuration must remain unshielded. Operating temperature range must encompass -40°C to 125°C. Mounting type must be surface mount. Physical package dimensions must be compatible with 3.00mm x 2.80mm x 2.80mm footprint. RoHS3 compliance is required.

The SDR0302-820KL meets all substitution criteria. Tolerance specification differs (±10% versus ±20%), which represents an improvement in inductance accuracy and does not restrict substitution eligibility.

Parameter Comparison

Parameter	PM32-820M-RC	SDR0302-820KL	Compatibility
Inductance	82 µH	82 µH	Equivalent
Tolerance	±20%	±10%	Substitute has tighter tolerance
Current Rating	280 mA	280 mA	Equivalent
Current - Saturation	300 mA	300 mA	Equivalent
DC Resistance (DCR)	2.1 Ohm Max	2.1 Ohm Max	Equivalent
Q @ Frequency	24 @ 2.52 MHz	24 @ 2.52 MHz	Equivalent
Self Resonant Frequency	12 MHz	12 MHz	Equivalent
Core Type	Ferrite Drum Core, Wirewound	Ferrite Drum Core, Wirewound	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Operating Temperature	-40°C to 125°C	-40°C to 125°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Size	3.00mm x 2.80mm x 2.80mm	3.00mm x 2.80mm x 2.80mm	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

Both PM32-820M-RC and SDR0302-820KL are Active status products manufactured by Bourns Inc. and maintain full ROHS3 compliance and REACH unaffected status. The SDR0302-820KL provides improved inductance tolerance specification at ±10% compared to the PM32-820M-RC at ±20%, which may offer enhanced circuit performance in applications requiring tighter inductance accuracy. Selection between these parts should be based on inventory availability, lead time requirements, and application-specific tolerance needs. Both parts are electrically and mechanically interchangeable within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-820KL replace PM32-820M-RC in existing designs? A: Yes. Both parts share identical inductance value, current rating, DC resistance, core type, shielding configuration, operating temperature range, and physical package dimensions. The SDR0302-820KL features improved inductance tolerance, which does not restrict substitution.

Q: What is the significance of the tolerance difference between these parts? A: The PM32-820M-RC specifies ±20% inductance tolerance, while the SDR0302-820KL specifies ±10%. Tighter tolerance in the substitute part means inductance values will remain closer to the nominal 82 µH specification, which may improve circuit performance in precision applications.

Q: Are there any compliance or certification differences? A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings.

Q: Do these parts have the same physical footprint? A: Yes. Both parts measure 3.00mm length x 2.80mm width x 2.80mm height and use identical surface mount packaging, ensuring direct PCB compatibility.

Q: What is the current handling capability of these inductors? A: Both parts are rated for 280 mA continuous current with a saturation current of 300 mA maximum. DC resistance is specified at 2.1 Ohm maximum for both parts.

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