PM32-330M-RC Equivalent & Substitute Parts

Part Overview

The PM32-330M-RC is a 33 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., designed for surface mount applications. This component operates at 420 mA rated current with a maximum DC resistance of 850 mOhm and is rated for operating temperatures from -40°C to 125°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Inductance	33 µH
Current Rating	420 mA
DC Resistance (Max)	850 mOhm
Current - Saturation (Isat)	500 mA
Shielding	Unshielded
Core Material	Ferrite
Type	Drum Core, Wirewound
Mounting Type	Surface Mount
Package / Case	Nonstandard
Size / Dimension	0.118" L x 0.110" W (3.00mm x 2.80mm)
Height - Seated (Max)	0.110" (2.80mm)
Operating Temperature	-40°C ~ 125°C
Frequency - Self Resonant	18 MHz
Q @ Freq	20 @ 2.52 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PM32-330M-RC is determined by strict equivalence across the following critical parameters:

Inductance value: 33 µH (exact match required)
Current rating: 420 mA minimum
DC resistance: 850 mOhm maximum
Saturation current: 500 mA minimum
Core type: Ferrite drum core, unshielded
Mounting: Surface mount
Physical dimensions: 3.00mm L x 2.80mm W x 2.80mm H maximum
Operating temperature range: -40°C to 125°C minimum
Self-resonant frequency: 18 MHz minimum
Compliance: ROHS3 compliant

The SDR0302-330KL meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Parameter	PM32-330M-RC	SDR0302-330KL	Match Status
Inductance	33 µH	33 µH	Equivalent
Tolerance	±20%	±10%	SDR0302 tighter
Current Rating (Amps)	420 mA	420 mA	Equivalent
Current - Saturation (Isat)	500 mA	500 mA	Equivalent
DC Resistance (Max)	850 mOhm	850 mOhm	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Core Material	Ferrite	Ferrite	Equivalent
Type	Drum Core, Wirewound	Drum Core, Wirewound	Equivalent
Q @ Freq	20 @ 2.52 MHz	20 @ 2.52 MHz	Equivalent
Frequency - Self Resonant	18 MHz	18 MHz	Equivalent
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	Equivalent
Size / Dimension	3.00mm L x 2.80mm W	3.00mm L x 2.80mm W	Equivalent
Height - Seated (Max)	2.80mm	2.80mm	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Both PM32-330M-RC and SDR0302-330KL are active production components from Bourns Inc. with ROHS3 compliance and identical regulatory status under REACH and EAR99 classifications. The SDR0302-330KL offers a tighter inductance tolerance of ±10% compared to the PM32-330M-RC at ±20%, which may provide improved circuit performance in applications requiring closer inductance specification. Both parts are MSL Level 1 rated, indicating unlimited shelf life under standard storage conditions. Selection between these parts should be based on tolerance requirements, inventory availability, and design specifications.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-330KL be used as a direct replacement for PM32-330M-RC?

A: Yes. Both parts share identical electrical specifications including 33 µH inductance, 420 mA current rating, 850 mOhm maximum DC resistance, and 500 mA saturation current. Physical dimensions, mounting type, and operating temperature ranges are equivalent. Both are ROHS3 compliant with MSL Level 1 rating.

Q: What is the difference between PM32-330M-RC and SDR0302-330KL?

A: The primary difference is inductance tolerance. PM32-330M-RC has ±20% tolerance while SDR0302-330KL has ±10% tolerance. All other electrical and mechanical parameters are identical.

Q: Are there any package or footprint differences?

A: No. Both parts use identical nonstandard surface mount packages with dimensions of 3.00mm L x 2.80mm W x 2.80mm H maximum height. PCB footprints and land patterns are compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both PM32-330M-RC and SDR0302-330KL are ROHS3 compliant, REACH unaffected, and classified under EAR99. Moisture sensitivity level is MSL 1 for both parts.

Q: Which part should be selected for high-tolerance applications?

A: SDR0302-330KL is recommended for applications requiring tighter inductance tolerance due to its ±10% specification compared to PM32-330M-RC at ±20%.

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