DFEG10040D-8R2M=P3 Equivalent & Substitute Parts

Part Overview

The DFEG10040D-8R2M=P3 is an 8.2 µH shielded inductor manufactured by Murata Electronics, rated for 5.9 A continuous current with a maximum DC resistance of 29mOhm. This surface mount component features an iron powder core and is designed for applications requiring controlled inductance in compact form factors. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity.

Substiute Parts

DFEG10040D-8R2M=P3

Murata ElectronicsIn Stock: 1125DFEG10040D-8R2M=P3 Datasheet

Current PartRFQ

HCM1A1305-8R2-R

Eaton - Electronics DivisionIn Stock: 1082HCM1A1305-8R2-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DFEG10040D-8R2M=P3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 8.2 µH with ±20% tolerance
• Core material: Iron Powder
• Shielding: Shielded construction
• Mounting type: Surface Mount
• AEC-Q200 automotive qualification

Performance Compatibility Parameters:

• Current rating must meet or exceed 5.9 A
• DC resistance must not exceed 29mOhm to maintain thermal and efficiency characteristics
• Saturation current must support the application's peak current demands
• Operating temperature range must encompass -40°C ~ 125°C minimum

Physical Compatibility Parameters:

• Package footprint and height must accommodate existing PCB layout constraints
• Nonstandard package classification applies to both main and substitute parts

The HCM1A1305-8R2-R from Eaton Electronics Division meets all critical matching parameters and exceeds performance specifications, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The HCM1A1305-8R2-R is the qualified substitute for the obsolete DFEG10040D-8R2M=P3. Both components carry AEC-Q200 automotive qualification and maintain RoHS compliance, ensuring regulatory and quality standards are preserved.

The Eaton substitute provides performance improvements across all electrical parameters: 23.7% higher current rating (7.3 A vs 5.9 A), 30.7% lower DC resistance (20.1mOhm vs 29mOhm), and 75.7% higher saturation current (13 A vs 7.4 A). The extended operating temperature range (-55°C ~ 155°C vs -40°C ~ 125°C) provides additional thermal margin for demanding applications.

Physical dimensions increase from 10.90mm x 10.00mm x 4.00mm to 13.30mm x 12.20mm x 5.00mm. PCB layout verification is required to confirm footprint compatibility with existing designs. Both components maintain identical inductance value, tolerance, core material, shielding, and mounting type, confirming functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the HCM1A1305-8R2-R directly replace the DFEG10040D-8R2M=P3 without circuit redesign?

A: Electrical substitution is direct due to matching inductance (8.2 µH ±20%), core material (iron powder), shielding, and AEC-Q200 qualification. Physical PCB layout must be verified, as the substitute is larger (13.30mm x 12.20mm x 5.00mm vs 10.90mm x 10.00mm x 4.00mm). If space constraints exist, layout modification may be necessary.

Q: What are the key differences between these two inductors?

A: The primary differences are product status (obsolete vs active), physical dimensions, and performance specifications. The Eaton substitute offers superior electrical performance with lower DC resistance and higher current/saturation ratings. Operating temperature range is also extended on the substitute part.

Q: Why is DC resistance important for this substitution?

A: DC resistance directly affects power dissipation and thermal performance. The HCM1A1305-8R2-R's lower DCR (20.1mOhm vs 29mOhm) reduces I²R losses, improving efficiency and reducing heat generation in the application circuit.

Q: Are both parts automotive qualified?

A: Yes. Both the DFEG10040D-8R2M=P3 and HCM1A1305-8R2-R carry AEC-Q200 qualification, meeting automotive reliability and quality standards.

Q: What is the impact of the larger package size?

A: The substitute's larger footprint (13.30mm x 12.20mm vs 10.90mm x 10.00mm) and height (5.00mm vs 4.00mm) require PCB layout verification. Existing designs with tight space constraints may require component repositioning or board redesign to accommodate the substitute.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both components have MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.