PM43-2R2M Equivalent & Substitute Parts Reference

Part Overview

The PM43-2R2M is a 2.2 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.75 A with a DC resistance of 72mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 100°C and is not RoHS compliant.

Substiute Parts

PM43-2R2M

Bourns Inc.In Stock: 1055PM43-2R2M Datasheet

Current PartRFQ

SDR0403-2R2ML

Bourns Inc.In Stock: 10153SDR0403-2R2ML Datasheet

DirectRFQ

SRR1806-102M

Bourns Inc.In Stock: 887SRR1806-102M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM43-2R2M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 2.2 µH (±20% tolerance)
• Core material: Ferrite
• Mounting type: Surface Mount
• Package footprint: 4.50mm x 4.00mm base dimensions
• Shielding configuration: Unshielded

Secondary Compatibility Factors:

• Current rating must equal or exceed 1.75 A
• DC resistance should not significantly exceed 72mOhm to maintain circuit performance
• Operating temperature range should encompass or extend the original -40°C to 100°C specification

The substitute parts listed below meet the primary matching criteria. Variations in secondary parameters reflect design improvements or different application requirements within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

SDR0403-2R2ML is the primary substitute for PM43-2R2M applications. This part maintains identical inductance (2.2 µH), tolerance (±20%), and physical footprint (4.50mm x 4.00mm x 4.60mm). The SDR0403-2R2ML provides superior current handling (2.6 A versus 1.75 A) and lower DC resistance (47mOhm Max versus 72mOhm), resulting in improved thermal performance. The part is ROHS3 compliant and carries active product status with extended operating temperature range (-40°C to 125°C). Packaging is available in Tape & Reel format.

SRR1806-102M is not recommended as a direct substitute. While manufactured by Bourns Inc. and ROHS3 compliant, this part has a fundamentally different inductance value (1 mH versus 2.2 µH), significantly lower current rating (450 mA versus 1.75 A), and substantially larger physical dimensions (18.30mm x 14.00mm x 7.10mm). The shielded configuration and different electrical characteristics make this part unsuitable for circuits designed around the PM43-2R2M specification.

Frequently Asked Questions (FAQ)

Q: Can SDR0403-2R2ML be used as a direct replacement for PM43-2R2M?

A: Yes. Both parts share identical inductance (2.2 µH), tolerance (±20%), core material (ferrite), shielding configuration (unshielded), and physical footprint (4.50mm x 4.00mm x 4.60mm). The SDR0403-2R2ML exceeds the current rating requirement and provides lower DC resistance, making it functionally compatible for the same circuit applications.

Q: What are the key differences between PM43-2R2M and SDR0403-2R2ML?

A: The SDR0403-2R2ML offers improved specifications: higher current rating (2.6 A versus 1.75 A), lower DC resistance (47mOhm Max versus 72mOhm), extended operating temperature range (-40°C to 125°C versus -40°C to 100°C), and ROHS3 compliance. The PM43-2R2M is obsolete; SDR0403-2R2ML is active production.

Q: Why is SRR1806-102M listed if it cannot substitute for PM43-2R2M?

A: SRR1806-102M is included in the reference data but does not meet substitution criteria due to different inductance value (1 mH), insufficient current rating (450 mA), and incompatible physical dimensions. This clarification prevents inadvertent selection of an unsuitable part.

Q: Are there packaging format differences between PM43-2R2M and SDR0403-2R2ML?

A: PM43-2R2M packaging format is not specified in available data. SDR0403-2R2ML is supplied in Tape & Reel (TR) format. Verify packaging requirements for your procurement process.

Q: What compliance certifications apply to the substitute part?

A: SDR0403-2R2ML is ROHS3 compliant and REACH unaffected. The original PM43-2R2M is RoHS non-compliant. If regulatory compliance is required, SDR0403-2R2ML satisfies current environmental standards.