PM32-121M-RC Equivalent & Substitute Parts

Part Overview

The PM32-121M-RC is a 120 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 220 mA continuous current with a maximum DC resistance of 3.2Ohm. This surface mount component operates across the temperature range of -40°C to 125°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when electrical specifications, mechanical dimensions, and compliance certifications align within acceptable engineering tolerances.

Substiute Parts

PM32-121M-RC

Bourns Inc.In Stock: 823PM32-121M-RC Datasheet

Current PartRFQ

SDR0302-121KL

Bourns Inc.In Stock: 4355SDR0302-121KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM32-121M-RC is determined by strict alignment of the following critical parameters:

Inductance value must match at 120 µH. Current rating must support minimum 220 mA continuous operation. DC resistance must not exceed 3.2Ohm maximum. Core material and shielding configuration must be identical (ferrite, unshielded). Package dimensions must be equivalent to enable direct PCB placement without layout modification. Operating temperature range must encompass -40°C to 125°C. Self-resonant frequency must remain at or above 10 MHz. Surface mount mounting type is required. RoHS3 compliance and MSL 1 rating must be maintained.

The SDR0302-121KL meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

Both PM32-121M-RC and SDR0302-121KL are active production components from Bourns Inc. with identical electrical performance, mechanical compatibility, and regulatory compliance. Selection between these parts may be based on inductance tolerance requirements and inventory availability. The SDR0302-121KL provides tighter tolerance specification (±10% versus ±20%), which may be advantageous in applications requiring higher inductance accuracy. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future manufacturing requirements.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-121KL replace PM32-121M-RC in existing designs?

A: Yes. Both parts share identical electrical specifications (120 µH inductance, 220 mA current rating, 3.2Ohm DC resistance), core material composition, and package dimensions (3.00mm x 2.80mm x 2.80mm). Direct PCB substitution is supported without layout modification.

Q: What is the difference in inductance tolerance between these parts?

A: PM32-121M-RC specifies ±20% tolerance, while SDR0302-121KL specifies ±10% tolerance. The SDR0302-121KL provides tighter inductance accuracy. Both tolerances are measured at 1 kHz test frequency.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both PM32-121M-RC and SDR0302-121KL are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the moisture sensitivity rating for these inductors?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.

Q: Do these parts have identical thermal operating ranges?

A: Yes. Both components operate across -40°C to 125°C, supporting equivalent thermal performance in target applications.