PM43-1R4M-RC Equivalent & Substitute Parts

Part Overview

The PM43-1R4M-RC is a 1.4 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 3.3 A continuous current with a maximum DC resistance of 38 mOhm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when electrical and mechanical parameters match within the allowed tolerances for this inductor category, ensuring functional equivalence in surface mount applications.

Substiute Parts

PM43-1R4M-RC

Bourns Inc.In Stock: 1080PM43-1R4M-RC Datasheet

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SDR0403-1R4ML

Bourns Inc.In Stock: 8880SDR0403-1R4ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM43-1R4M-RC are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

• Inductance value: 1.4 µH with ±20% tolerance
• Current rating: 3.3 A minimum
• Saturation current (Isat): 5.1 A
• DC resistance: 38 mOhm maximum
• Core type: Ferrite, unshielded drum core
• Q factor: 28 @ 7.96 MHz
• Self resonant frequency: 110 MHz
• Operating temperature range: -40°C ~ 125°C
• Mounting: Surface mount
• Physical footprint: 4.50 mm x 4.00 mm x 4.60 mm
• Compliance: ROHS3 compliant, MSL 1

Parts meeting all these parameters are classified as direct electrical and mechanical equivalents.

Parameter Comparison

Engineering Selection Recommendations

Both the PM43-1R4M-RC and SDR0403-1R4ML are Active status products manufactured by Bourns Inc. with identical electrical specifications and physical dimensions. Selection between these parts may be based on inventory availability and supply chain considerations. Both components meet ROHS3 compliance requirements and carry MSL 1 rating, indicating no moisture sensitivity restrictions. The SDR0403-1R4ML series offers higher inventory availability (8,781 pcs) compared to the PM43-1R4M-RC (1,011 pcs), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can SDR0403-1R4ML be used as a direct replacement for PM43-1R4M-RC?

A: Yes. Both parts share identical electrical parameters (1.4 µH inductance, 3.3 A rating, 38 mOhm DCR, 5.1 A saturation current), identical Q factor (28 @ 7.96 MHz), identical self resonant frequency (110 MHz), and identical physical dimensions (4.50 mm x 4.00 mm x 4.60 mm). Both are ROHS3 compliant with MSL 1 rating.

Q: Are there any package or footprint differences between these parts?

A: No. Both components use identical surface mount packaging with nonstandard case dimensions of 4.50 mm length x 4.00 mm width x 4.60 mm height. PCB layout and reflow profiles remain unchanged.

Q: What determines substitution eligibility for this inductor?

A: Substitution is based on matching inductance value (1.4 µH ±20%), current rating (3.3 A minimum), saturation current (5.1 A), DC resistance (38 mOhm maximum), core material (ferrite, unshielded), frequency characteristics (Q factor and self resonant frequency), operating temperature range (-40°C ~ 125°C), and physical footprint. All parameters must align within specified tolerances.

Q: Are compliance certifications identical between these parts?

A: Yes. Both PM43-1R4M-RC and SDR0403-1R4ML carry ROHS3 compliance, REACH Unaffected status, and MSL 1 rating. ECCN classification is EAR99 for both parts.