PM32-271M-RC Equivalent & Substitute Parts

Part Overview

The PM32-271M-RC is a 270 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 150 mA continuous current with a maximum DC resistance of 8.6Ohm. 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.

Substiute Parts

PM32-271M-RC

Bourns Inc.In Stock: 1084PM32-271M-RC Datasheet

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SDR0302-271KL

Bourns Inc.In Stock: 1534SDR0302-271KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM32-271M-RC are identified based on strict equivalence of the following critical parameters:

• Inductance value: 270 µH
• Current rating: 150 mA minimum
• Saturation current (Isat): 170mA minimum
• DC resistance: 8.6Ohm maximum
• Core type: Ferrite drum core, wirewound, unshielded
• Mounting: Surface mount
• Physical dimensions: 0.118" L x 0.110" W (3.00mm x 2.80mm), height 0.110" (2.80mm) maximum
• Operating temperature range: -40°C ~ 125°C minimum
• Self-resonant frequency: 7MHz minimum
• Compliance: ROHS3 compliant, MSL 1

The SDR0302-271KL meets all critical electrical and mechanical parameters required for substitution with the PM32-271M-RC.

Parameter Comparison

Engineering Selection Recommendations

Both the PM32-271M-RC and SDR0302-271KL are Active status products manufactured by Bourns Inc. and maintain full ROHS3 compliance with MSL 1 rating. The SDR0302-271KL offers a tighter inductance tolerance of ±10% compared to the PM32-271M-RC at ±20%, while maintaining identical electrical performance across current rating, saturation current, DC resistance, and frequency characteristics. Both components are suitable for applications requiring 270 µH inductance at 150 mA continuous current within the -40°C to 125°C operating range. Component selection between these parts depends on tolerance requirements and inventory availability.

Frequently Asked Questions (FAQ)

Q: What makes SDR0302-271KL a valid substitute for PM32-271M-RC?

A: The SDR0302-271KL maintains electrical equivalence across all critical parameters: 270 µH inductance, 150 mA current rating, 170mA saturation current, 8.6Ohm maximum DC resistance, identical core type and shielding configuration, matching frequency characteristics, and identical physical dimensions and mounting specifications.

Q: Are there differences between these parts?

A: The primary difference is inductance tolerance. The SDR0302-271KL specifies ±10% tolerance while the PM32-271M-RC specifies ±20% tolerance. Both parts are manufactured by Bourns Inc. and share identical electrical performance ratings and physical packaging.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts feature identical surface mount packaging, nonstandard case dimensions of 0.118" L x 0.110" W (3.00mm x 2.80mm), and maximum seated height of 0.110" (2.80mm). Footprint compatibility is maintained.

Q: What compliance certifications apply to both parts?

A: Both the PM32-271M-RC and SDR0302-271KL are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Both maintain Active product status.

Q: Are there temperature or frequency limitations for substitution?

A: No. Both parts operate across the identical temperature range of -40°C to 125°C with matching self-resonant frequency of 7MHz and Q factor of 45 @ 796kHz.