ESRE391M0ER-F Equivalent & Substitute Parts

Part Overview

The ESRE391M0ER-F is a 390 µF, 2.5 V aluminum-polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is designed for bypass and decoupling applications in electronic circuits. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

ESRE391M0ER-F

Cornell Dubilier Electronics (CDE)In Stock: 1042ESRE391M0ER-F Datasheet

Current PartRFQ

EEF-SX0E391ER

Panasonic Electronic ComponentsIn Stock: 7350EEF-SX0E391ER Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ESRE391M0ER-F is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Capacitance value: 390 µF (exact match required)
• Voltage rating: 2.5 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Dielectric type: Aluminum - Polymer (exact match required)
• Mounting type: Surface Mount (exact match required)
• Operating temperature range: -55°C ~ 105°C (minimum requirement)

Acceptable Variations:

• ESR (Equivalent Series Resistance): Lower values are acceptable
• Lifetime @ Temperature: Higher values are acceptable
• Product status: Active status preferred over obsolete
• Packaging format: Tape & Reel acceptable as alternative to standard packaging

The substitute part EEF-SX0E391ER meets all critical matching parameters and represents a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The EEF-SX0E391ER from Panasonic Electronic Components is a direct functional equivalent to the obsolete ESRE391M0ER-F. Selection of this substitute is supported by the following engineering factors:

Compliance & Certification: Both parts maintain ROHS3 compliance, ensuring regulatory alignment for applications subject to hazardous substance restrictions. The substitute part carries REACH Unaffected status, providing additional environmental compliance documentation.

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain stability compared to the obsolete main part.

Electrical Equivalence: Capacitance, voltage rating, tolerance, and operating temperature range are identical across both parts. The substitute provides specified ESR of 9 mOhm and extended lifetime rating of 2000 Hrs @ 105°C, representing improved performance characteristics.

Physical Compatibility: Both parts utilize identical footprint dimensions (7.30mm x 4.30mm) and the same 2917 (7343 Metric) package. The substitute part features reduced seated height (2.00mm vs. 4.10mm), which may provide design flexibility in space-constrained applications.

Packaging Consideration: The substitute is supplied in Tape & Reel format, standard for high-volume production environments. Original packaging format should be confirmed for compatibility with assembly equipment specifications.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0E391ER directly replace the ESRE391M0ER-F in existing designs?

A: Yes. Both parts share identical electrical specifications (390 µF, 2.5 V, ±20% tolerance) and physical footprint (7.30mm x 4.30mm, 2917 package). PCB layout compatibility is confirmed. The substitute part's reduced height (2.00mm vs. 4.10mm) may require clearance verification in height-constrained assemblies.

Q: What is the significance of the ESR difference between the two parts?

A: The main part does not specify ESR. The substitute part specifies 9 mOhm ESR, which is a measured electrical characteristic. Lower ESR generally indicates improved high-frequency performance and reduced heat generation. This represents an enhancement over the main part.

Q: Why is the substitute part's lifetime rating higher (2000 Hrs vs. 1000 Hrs @ 105°C)?

A: The substitute part demonstrates extended operational life under thermal stress conditions. This is a performance improvement and does not affect substitution compatibility. Both parts meet the same operating temperature range (-55°C ~ 105°C).

Q: Are there any compliance or certification differences between the parts?

A: Both parts are ROHS3 compliant. The substitute part additionally carries REACH Unaffected status. Both parts share identical ECCN (EAR99) and HTSUS (8532.22.0020) classifications.

Q: Does the Tape & Reel packaging format affect compatibility?

A: Tape & Reel is a standard production packaging format for surface mount components. Compatibility depends on assembly equipment specifications. Confirm that production equipment supports this packaging format before implementation.

Q: What is the Moisture Sensitivity Level (MSL) for the substitute part?

A: The substitute part's MSL is not provided in the available technical data. Obtain this specification from the manufacturer datasheet if moisture sensitivity is a design consideration for your application environment.