PM32-471M-RC Equivalent & Substitute Parts

Part Overview

The PM32-471M-RC is a 470 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., designed for surface mount applications. This component is rated for 105 mA continuous current with a maximum DC resistance of 14.3 Ohm and operates across the temperature range of -40°C to 125°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across critical parameters including inductance value, current rating, DC resistance, core material, and package dimensions.

Key Parameters

Parameter	Value
Inductance	470 µH
Inductance Tolerance	±20%
Current Rating	105 mA
Current - Saturation (Isat)	130 mA
DC Resistance (DCR)	14.3 Ohm Max
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Surface Mount
Package Dimensions	0.118" L x 0.110" W x 0.110" H (3.00mm x 2.80mm x 2.80mm)
Operating Temperature Range	-40°C to 125°C
Q @ Frequency	42 @ 796 kHz
Self Resonant Frequency	5 MHz

Substitute Part Grouping Explanation

Substitution eligibility for the PM32-471M-RC is determined by strict equivalence across the following critical parameters:

Inductance value: 470 µH (exact match required)
Current rating: 105 mA minimum
DC resistance: 14.3 Ohm maximum
Core material: Ferrite, unshielded drum core construction
Package dimensions: 0.118" L x 0.110" W x 0.110" H (3.00mm x 2.80mm x 2.80mm)
Mounting configuration: Surface mount, nonstandard package
Operating temperature range: -40°C to 125°C minimum
Saturation current: 130 mA minimum

The SDR0302-471KL meets all substitution criteria with identical electrical performance and mechanical compatibility. Tolerance variation (±10% vs ±20%) represents an improvement in precision without affecting functional interchangeability.

Parameter Comparison

Parameter	PM32-471M-RC	SDR0302-471KL	Match Status
Manufacturer	Bourns Inc.	Bourns Inc.	Identical
Inductance	470 µH	470 µH	Identical
Inductance Tolerance	±20%	±10%	Compatible (SDR0302 tighter)
Current Rating	105 mA	105 mA	Identical
Current - Saturation	130 mA	130 mA	Identical
DC Resistance (DCR)	14.3 Ohm Max	14.3 Ohm Max	Identical
Core Material	Ferrite	Ferrite	Identical
Shielding	Unshielded	Unshielded	Identical
Q @ Frequency	42 @ 796 kHz	42 @ 796 kHz	Identical
Self Resonant Frequency	5 MHz	5 MHz	Identical
Operating Temperature	-40°C to 125°C	-40°C to 125°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package Dimensions	3.00mm x 2.80mm x 2.80mm	3.00mm x 2.80mm x 2.80mm	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both PM32-471M-RC and SDR0302-471KL are active production components from Bourns Inc. with full ROHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and tolerance requirements.

The PM32-471M-RC operates with ±20% inductance tolerance. The SDR0302-471KL provides tighter ±10% tolerance while maintaining all other electrical and mechanical specifications. Both parts satisfy identical regulatory and environmental compliance requirements.

Component selection should be based on circuit tolerance requirements and supply chain availability. The SDR0302-471KL represents a direct functional substitute with improved tolerance performance.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-471KL replace PM32-471M-RC in existing designs?

A: Yes. The SDR0302-471KL is a direct substitute. All critical electrical parameters (inductance, current rating, DC resistance, saturation current, Q factor, self-resonant frequency) are identical. Package dimensions and mounting configuration are identical. The tighter tolerance specification (±10% vs ±20%) represents an improvement in precision.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical certifications: ROHS3 compliance, REACH unaffected status, MSL 1 (unlimited moisture sensitivity), and EAR99 export classification. Both are active production components.

Q: What is the significance of the inductance tolerance difference?

A: The PM32-471M-RC specifies ±20% tolerance, while the SDR0302-471KL specifies ±10% tolerance. This means the SDR0302-471KL maintains inductance value within a narrower range around the 470 µH nominal specification. For applications requiring tighter inductance control, the SDR0302-471KL provides superior performance. Both tolerances are acceptable for standard circuit applications.

Q: Are the physical packages identical?

A: Yes. Both parts use identical nonstandard surface mount packages with dimensions of 0.118" L x 0.110" W x 0.110" H (3.00mm x 2.80mm x 2.80mm). PCB footprints and assembly processes are identical.

Q: What is the operating temperature range for both parts?

A: Both the PM32-471M-RC and SDR0302-471KL operate across -40°C to 125°C. Temperature performance is identical.

Q: Are there any electrical performance differences in Q factor or resonant frequency?

A: No. Both parts exhibit identical Q factor (42 @ 796 kHz) and self-resonant frequency (5 MHz). High-frequency performance characteristics are equivalent.

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