PM43-8R2M-RC Equivalent & Substitute Parts

Part Overview

The PM43-8R2M-RC is an 8.2 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., designed for surface mount applications. This component is rated for 1.26 A continuous current with a maximum DC resistance of 130 mOhm and operates across the temperature range of -40°C to 125°C. The part is currently active in production and ROHS3 compliant, making it suitable for modern electronic assemblies requiring fixed inductance filtering, impedance matching, or energy storage applications.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across critical operating parameters. The availability of alternative part numbers ensures supply chain flexibility and design continuity.

Substiute Parts

PM43-8R2M-RC

Bourns Inc.In Stock: 776PM43-8R2M-RC Datasheet

Current PartRFQ

SDR0403-8R2ML

Bourns Inc.In Stock: 5158SDR0403-8R2ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM43-8R2M-RC is determined by strict equivalence across the following critical parameters:

• Inductance Value: 8.2 µH with ±20% tolerance
• Current Rating: 1.26 A minimum continuous current capacity
• Saturation Current (Isat): 1.9 A minimum
• DC Resistance: 130 mOhm maximum
• Quality Factor (Q): 28 @ 7.96 MHz
• Self-Resonant Frequency: 36 MHz
• Operating Temperature Range: -40°C to 125°C
• Mounting Type: Surface Mount
• Physical Dimensions: 4.50 mm L × 4.00 mm W × 4.60 mm H (Max)
• Core Material: Ferrite, Unshielded
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The SDR0403-8R2ML meets all specified electrical and mechanical parameters, qualifying it as a direct equivalent substitute for the PM43-8R2M-RC.

Parameter Comparison

Engineering Selection Recommendations

Both the PM43-8R2M-RC and SDR0403-8R2ML are active production components manufactured by Bourns Inc. with identical electrical specifications and mechanical compatibility. Selection between these parts should be based on supply chain availability and inventory status.

The PM43-8R2M-RC is available with 740 pieces in stock. The SDR0403-8R2ML offers higher inventory availability at 5100 pieces in stock, providing greater supply chain flexibility for high-volume production requirements.

Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for modern electronic assemblies. The identical operating temperature range of -40°C to 125°C ensures thermal performance equivalence across all specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-8R2ML be used as a direct replacement for the PM43-8R2M-RC?

A: Yes. The SDR0403-8R2ML is electrically and mechanically equivalent to the PM43-8R2M-RC. All critical parameters including inductance, current rating, DC resistance, quality factor, self-resonant frequency, and physical dimensions are identical. Both components are manufactured by Bourns Inc. and share identical regulatory compliance certifications.

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

A: No. Both parts use identical surface mount packaging with nonstandard case dimensions of 4.50 mm L × 4.00 mm W × 4.60 mm H (Max). PCB footprints and assembly processes are compatible without modification.

Q: What is the significance of the ±20% inductance tolerance?

A: The ±20% tolerance defines the acceptable range of inductance values for both parts. At the nominal 8.2 µH specification, actual measured inductance will fall between 6.56 µH and 9.84 µH. This tolerance applies equally to both the PM43-8R2M-RC and SDR0403-8R2ML, ensuring equivalent circuit performance.

Q: Do both parts have the same thermal performance?

A: Yes. Both components operate across the identical temperature range of -40°C to 125°C with equivalent DC resistance characteristics. Thermal behavior and derating curves are equivalent.

Q: What is the difference between current rating and saturation current?

A: The current rating of 1.26 A represents the continuous operating current limit. The saturation current (Isat) of 1.9 A indicates the current level at which the inductor's inductance begins to degrade due to core saturation. Both specifications are identical for both parts.

Q: Are moisture sensitivity considerations the same for both parts?

A: Yes. Both components carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. No special storage or handling precautions are necessary.