PM32-1R4M-RC Equivalent & Substitute Parts

Part Overview

The PM32-1R4M-RC is a 1.4 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.5 A continuous current with a maximum DC resistance of 70 mOhm. 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 circuit requirements allow tolerance in inductance value, current rating, or saturation characteristics while maintaining electrical and mechanical compatibility within the same package footprint and mounting specification.

Substiute Parts

PM32-1R4M-RC

Bourns Inc.In Stock: 1179PM32-1R4M-RC Datasheet

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SDR0302-1R5ML

Bourns Inc.In Stock: 4623SDR0302-1R5ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The SDR0302-1R5ML qualifies as a substitute for the PM32-1R4M-RC based on the following substitution criteria:

Mechanical Compatibility: Both parts share identical physical dimensions (0.118" L x 0.110" W / 3.00mm x 2.80mm) and maximum seated height (0.110" / 2.80mm), enabling direct footprint compatibility on PCB layouts designed for the PM32-1R4M-RC.

Electrical Tolerance Alignment: The PM32-1R4M-RC inductance tolerance of ±20% establishes an acceptable inductance range of 1.12 µH to 1.68 µH. The SDR0302-1R5ML nominal inductance of 1.5 µH falls within this tolerance band, making it electrically compatible for applications where the ±20% tolerance specification is met.

Current Rating Consideration: The SDR0302-1R5ML provides a higher continuous current rating of 1.9 A compared to the PM32-1R4M-RC at 1.5 A. This represents a performance enhancement suitable for applications requiring increased current capacity without exceeding the saturation current specification.

DC Resistance Equivalence: Both parts maintain identical maximum DC resistance of 70 mOhm, ensuring equivalent power dissipation characteristics and thermal performance.

Environmental and Compliance Alignment: Both components operate across the same temperature range (-40°C to 125°C), maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, confirming regulatory and environmental compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the PM32-1R4M-RC and SDR0302-1R5ML maintain Active product status, confirming long-term availability and manufacturing support. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement. The SDR0302-1R5ML offers increased current capacity at 1.9 A versus 1.5 A, providing design margin for applications approaching the PM32-1R4M-RC current limit. Selection between these parts depends on circuit current requirements and inductance tolerance specifications. When the application current demand exceeds 1.5 A but remains below 1.9 A, the SDR0302-1R5ML provides enhanced performance headroom. When strict inductance matching to 1.4 µH is required, the PM32-1R4M-RC remains the primary selection.

Frequently Asked Questions (FAQ)

Q: Can the SDR0302-1R5ML replace the PM32-1R4M-RC in existing designs?

A: Yes, provided the circuit design accommodates the 1.5 µH inductance value within the ±20% tolerance specification and the application current requirement does not exceed 1.9 A. The identical physical footprint and electrical characteristics enable direct substitution on PCB layouts.

Q: What is the inductance tolerance range for the PM32-1R4M-RC?

A: With a ±20% tolerance specification, the PM32-1R4M-RC inductance range is 1.12 µH to 1.68 µH. The SDR0302-1R5ML nominal value of 1.5 µH falls within this acceptable range.

Q: Are there differences in DC resistance between these parts?

A: No. Both the PM32-1R4M-RC and SDR0302-1R5ML specify a maximum DC resistance of 70 mOhm, ensuring equivalent power dissipation and thermal characteristics.

Q: What is the primary advantage of the SDR0302-1R5ML over the PM32-1R4M-RC?

A: The SDR0302-1R5ML provides a higher continuous current rating of 1.9 A compared to 1.5 A, offering increased current capacity for applications requiring additional design margin.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both components operate across -40°C to 125°C, maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, confirming equivalent environmental and regulatory qualification.

Q: Are the packaging formats identical?

A: Yes. Both parts are supplied in Tape & Reel (TR) packaging, enabling compatibility with standard automated assembly processes.