DEM8045Z-470M=P3 Equivalent & Substitute Parts

Part Overview

The DEM8045Z-470M=P3 is a 47 µH shielded drum core wirewound inductor manufactured by Murata Electronics. This surface mount component is rated for 1.8 A continuous current with a maximum DC resistance of 204 mOhm and operates across the temperature range of -40°C to 125°C. The part carries AEC-Q200 automotive qualification and is RoHS3 compliant. The component is actively produced and maintained in inventory, with 784 units currently available. Equivalent and substitute parts are identified based on matching inductance value, tolerance, core material, shielding characteristics, and surface mount package compatibility.

Substiute Parts

DEM8045Z-470M=P3

Murata ElectronicsIn Stock: 894DEM8045Z-470M=P3 Datasheet

Current PartRFQ

SRN8040HA-470M

Bourns Inc.In Stock: 2036SRN8040HA-470M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DEM8045Z-470M=P3 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value of 47 µH
• Tolerance of ±20%
• Ferrite core material
• Surface mount package configuration
• Nonstandard package case type

Secondary Compatibility Factors:

• Current rating capability (minimum 1.4 A acceptable for applications not requiring full 1.8 A)
• DC resistance within acceptable operating margins
• Saturation current rating above 2.0 A
• AEC-Q200 automotive qualification
• RoHS3 compliance status
• Operating temperature range overlap

The substitute part SRN8040HA-470M from Bourns Inc. meets the primary matching criteria with identical inductance and tolerance specifications. The substitute exhibits semi-shielded construction versus the main part's fully shielded design, resulting in different electromagnetic interference characteristics. Current rating differential (1.4 A versus 1.8 A) and DC resistance variance (237 mOhm versus 204 mOhm) represent measurable deviations that must be evaluated within specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the DEM8045Z-470M=P3 and SRN8040HA-470M are active production components with AEC-Q200 automotive qualification and RoHS3 compliance. Selection between these parts depends on application-specific requirements:

DEM8045Z-470M=P3 (Murata) is appropriate when:

• Full shielding is required to minimize electromagnetic interference
• Current load approaches or exceeds 1.4 A continuously
• DC resistance contribution to circuit performance is critical
• Operating temperature remains within -40°C to 125°C range
• Fully shielded drum core construction is specified

SRN8040HA-470M (Bourns) is appropriate when:

• Semi-shielded construction is acceptable for the application
• Current requirements do not exceed 1.4 A
• Extended operating temperature capability to 150°C is beneficial
• Slightly lower profile (4.20mm versus 4.50mm) accommodates space constraints
• Marginally higher saturation current (2.2 A versus 2.1 A) provides additional headroom

Both components share identical inductance, tolerance, core material, and surface mount configuration. Inventory availability differs, with Bourns SRN8040HA-470M showing 2022 units in stock versus 784 units for the Murata part.

Frequently Asked Questions (FAQ)

Q: Can the SRN8040HA-470M directly replace the DEM8045Z-470M=P3 in all applications?

A: Direct replacement is possible only when application requirements accommodate the parameter differences. The substitute part has lower continuous current rating (1.4 A versus 1.8 A), higher DC resistance (237 mOhm versus 204 mOhm), and semi-shielded versus fully shielded construction. Circuits operating below 1.4 A with acceptable EMI performance from semi-shielded design are compatible.

Q: What is the significance of the shielding difference between these parts?

A: The DEM8045Z-470M=P3 features full shielding, which provides superior electromagnetic interference containment. The SRN8040HA-470M uses semi-shielded construction, which reduces but does not eliminate radiated emissions. Applications sensitive to EMI or requiring compliance with strict shielding specifications must use the fully shielded Murata part.

Q: How does the current rating difference affect substitution?

A: The DEM8045Z-470M=P3 is rated for 1.8 A continuous current, while the SRN8040HA-470M is rated for 1.4 A. Applications requiring sustained current above 1.4 A must use the Murata part. For circuits operating at or below 1.4 A, the Bourns substitute is acceptable from a current capacity perspective.

Q: Are both parts suitable for automotive applications?

A: Yes. Both components carry AEC-Q200 automotive qualification and operate across overlapping temperature ranges. The Bourns part extends to 150°C maximum operating temperature, providing additional thermal margin compared to the Murata part's 125°C limit.

Q: What is the impact of DC resistance differences on circuit performance?

A: The DEM8045Z-470M=P3 has 204 mOhm maximum DC resistance, while the SRN8040HA-470M has 237 mOhm maximum. In circuits where inductor resistance contributes significantly to total impedance or power dissipation, this 33 mOhm difference may be relevant. Low-impedance circuits or applications where inductor resistance is negligible are unaffected by this variance.

Q: Do both parts have identical package dimensions?

A: No. The DEM8045Z-470M=P3 measures 8.00mm L x 8.00mm W x 4.50mm H, while the SRN8040HA-470M measures 8.15mm L x 7.90mm W x 4.20mm H. The Bourns part is slightly lower profile but marginally longer. PCB layout constraints may favor one part over the other depending on available space.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the DEM8045Z-470M=P3 and SRN8040HA-470M are RoHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly.