DEM8045Z-6R8N=P3 Equivalent & Substitute Parts

Part Overview

The DEM8045Z-6R8N=P3 is a 6.8 µH shielded drum core wirewound inductor manufactured by Murata Electronics, rated for 4.8 A continuous current with a maximum DC resistance of 27.6 mOhm. This component is classified as Active and complies with AEC-Q200 automotive qualification standards. The part is housed in a nonstandard surface mount package measuring 8.00mm × 8.00mm × 4.50mm (max height) and is RoHS3 compliant with MSL 1 rating.

Substitute parts are identified when equivalent inductance values, current ratings, and core material specifications align within acceptable tolerance ranges, enabling direct replacement in applications where the original part becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

DEM8045Z-6R8N=P3

Murata ElectronicsIn Stock: 1110DEM8045Z-6R8N=P3 Datasheet

Current PartRFQ

SRN8040HA-6R8M

Bourns Inc.In Stock: 1850SRN8040HA-6R8M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DEM8045Z-6R8N=P3 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 6.8 µH (tolerance range ±30% allows 4.76 µH to 8.84 µH)
• Core material: Ferrite
• Mounting type: Surface Mount
• Current rating: Minimum 3.9 A (acceptable for applications designed for 4.8 A with thermal margin consideration)
• DC resistance: Maximum 42 mOhm (acceptable increase from 27.6 mOhm within design tolerance)
• Operating temperature range: Minimum -40°C ~ 105°C coverage
• Compliance: AEC-Q200 rated, RoHS3 compliant

Identified Substitute: The SRN8040HA-6R8M (Bourns Inc.) meets substitution criteria with matching inductance (6.8 µH), ferrite core construction, surface mount configuration, and AEC-Q200 qualification. The part exhibits a lower current rating (3.9 A vs. 4.8 A) and higher DCR (42 mOhm vs. 27.6 mOhm), which requires application-level thermal and performance verification but remains functionally equivalent for many circuit implementations.

Parameter Comparison

Engineering Selection Recommendations

Both the DEM8045Z-6R8N=P3 and SRN8040HA-6R8M maintain Active product status and satisfy AEC-Q200 automotive qualification requirements. Both components are RoHS3 compliant with MSL 1 moisture sensitivity ratings, ensuring compatibility with standard PCB assembly and storage protocols.

The SRN8040HA-6R8M presents a viable substitute where the application circuit can accommodate the reduced current rating (3.9 A vs. 4.8 A) and increased DC resistance (42 mOhm vs. 27.6 mOhm). The Bourns part offers an extended operating temperature range (-40°C ~ 150°C) and improved inductance tolerance (±20% vs. ±30%), which may provide performance advantages in temperature-sensitive or precision-critical applications. The semi-shielded construction of the substitute part may introduce different electromagnetic coupling characteristics compared to the fully shielded original, requiring circuit-level assessment for EMI-sensitive designs.

Frequently Asked Questions (FAQ)

Q: Can the SRN8040HA-6R8M directly replace the DEM8045Z-6R8N=P3 in all applications?

A: Direct replacement is possible when the application circuit operates at or below 3.9 A continuous current and can tolerate the increased DC resistance of 42 mOhm. The semi-shielded construction may affect electromagnetic performance in noise-sensitive circuits. Thermal analysis is required to confirm acceptable power dissipation at the higher DCR value.

Q: What is the impact of the 15 mOhm increase in DC resistance?

A: The increase from 27.6 mOhm to 42 mOhm results in proportionally higher resistive losses. At 3.9 A, the Bourns part dissipates approximately 0.64 W compared to 0.42 W for the Murata part. Circuit thermal design must accommodate this additional power dissipation.

Q: Are there dimensional compatibility concerns?

A: The SRN8040HA-6R8M measures 8.15mm × 7.90mm × 4.20mm (max height) versus 8.00mm × 8.00mm × 4.50mm for the original part. The substitute is slightly larger in length and width but lower in height. PCB layout verification is necessary to confirm footprint clearance and component placement compatibility.

Q: Does the semi-shielded construction affect circuit performance?

A: Semi-shielded inductors exhibit different magnetic field containment compared to fully shielded designs. Applications requiring strict EMI control or operating in electromagnetically noisy environments should evaluate the impact on circuit performance and compliance with applicable EMI standards.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the DEM8045Z-6R8N=P3 and SRN8040HA-6R8M carry AEC-Q200 qualification, confirming suitability for automotive-grade applications with appropriate reliability and temperature performance standards.