ESRE391M02XR Equivalent & Substitute Parts Reference

Part Overview

The ESRE391M02XR is a 390 µF, 2 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 low-voltage electronic circuits. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

ESRE391M02XR

Cornell Dubilier Electronics (CDE)In Stock: 1100ESRE391M02XR Datasheet

Current PartRFQ

EEF-SX0D391ER

Panasonic Electronic ComponentsIn Stock: 11874EEF-SX0D391ER Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ESRE391M02XR is determined by strict adherence to the following critical parameters:

Critical Matching Parameters:

• Capacitance value of 390 µF (exact match required)
• Voltage rating of 2 V (substitute must equal or exceed this rating)
• Tolerance of ±20% (substitute tolerance must be equal or tighter)
• Package designation 2917 (7343 Metric) (physical footprint compatibility)
• Surface mount mounting type (assembly process compatibility)

Important Compatibility Parameters:

• Operating temperature range of -55°C to 105°C (substitute must cover this range)
• Aluminum polymer dielectric type (electrical characteristics consistency)
• RoHS3 compliance (regulatory requirement)

The substitute part EEF-SX0D391ER from Panasonic Electronic Components meets all critical matching parameters and maintains compatibility across all important parameters. This part is classified as active product status, providing long-term availability and supply chain stability compared to the obsolete ESRE391M02XR.

Parameter Comparison

Engineering Selection Recommendations

The EEF-SX0D391ER from Panasonic Electronic Components is a direct functional substitute for the obsolete ESRE391M02XR. Selection is based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements for current manufacturing and distribution.

Product Status and Supply Chain: The ESRE391M02XR is classified as obsolete, creating supply chain risk and limiting long-term availability. The EEF-SX0D391ER maintains active product status from Panasonic, ensuring continued availability and manufacturing support.

Electrical Parameter Equivalence: The substitute part matches all critical electrical specifications: 390 µF capacitance, 2 V voltage rating, and ±20% tolerance. The substitute demonstrates improved electrical performance with lower ESR (9 mOhm versus 10 mOhm) and higher ripple current capability (6.3 A versus 3.5 A at 100 kHz).

Reliability Enhancement: The substitute part offers extended lifetime rating of 2000 hours at 105°C compared to 1000 hours for the original part, providing improved long-term reliability in thermal stress conditions.

Physical Compatibility: Both components utilize identical package designation (2917 / 7343 Metric), surface mount mounting type, and land pattern dimensions (0.287" L x 0.169" W). The substitute features a lower seated height (0.079" versus 0.161"), which may provide additional design flexibility for space-constrained applications without compromising PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0D391ER be used as a direct replacement for the ESRE391M02XR in existing designs?

A: Yes. The EEF-SX0D391ER meets all critical substitution parameters: identical capacitance (390 µF), voltage rating (2 V), tolerance (±20%), package type (2917 / 7343 Metric), and surface mount configuration. The substitute is electrically and mechanically compatible with existing PCB layouts and assembly processes.

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

A: The primary differences are manufacturer (CDE versus Panasonic), product status (obsolete versus active), and performance characteristics. The substitute offers superior ESR (9 mOhm versus 10 mOhm), higher ripple current capability (6.3 A versus 3.5 A at 100 kHz), extended lifetime (2000 hours versus 1000 hours at 105°C), and lower seated height (0.079" versus 0.161").

Q: Are there any height clearance concerns when substituting the EEF-SX0D391ER?

A: No. The substitute part has a lower seated height (0.079" maximum) compared to the original part (0.161" maximum). This provides additional clearance and does not create any height-related compatibility issues. PCB land patterns and mounting requirements remain identical.

Q: Does the substitute part maintain the same thermal operating range?

A: Yes. Both components operate across the identical temperature range of -55°C to 105°C. The substitute part provides enhanced reliability at the upper temperature limit with its extended 2000-hour lifetime rating at 105°C.

Q: Are both parts RoHS compliant?

A: Yes. Both the ESRE391M02XR and EEF-SX0D391ER are ROHS3 compliant, meeting current environmental and regulatory requirements for manufacturing and distribution.

Q: What is the significance of the improved ESR and ripple current ratings on the substitute part?

A: Lower ESR (9 mOhm versus 10 mOhm) reduces heat generation and voltage ripple in the circuit. Higher ripple current capability (6.3 A versus 3.5 A at 100 kHz) indicates the substitute can handle greater AC current stress without exceeding temperature limits, providing improved performance margin in high-frequency bypass and decoupling applications.

Q: Is the substitute part available in the same packaging format?

A: The substitute part EEF-SX0D391ER is available in Tape & Reel (TR) packaging, which is standard for surface mount production environments. The original ESRE391M02XR packaging format is not specified in the provided data. Both parts use identical 2917 (7343 Metric) package and land pattern specifications.