SPSX391M02R - Equivalent & Substitute Parts

Part Overview

The SPSX391M02R is a 390 µF, 2 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This part is classified as obsolete, making substitute components necessary for ongoing design requirements and production continuity. Equivalent and alternative models from active manufacturers provide compatible electrical and mechanical specifications while maintaining the same functional performance for general purpose applications.

Substiute Parts

SPSX391M02R

Cornell Dubilier Electronics (CDE)In Stock: 995SPSX391M02R Datasheet

Current PartRFQ

EEF-CX0D391R

Panasonic Electronic ComponentsIn Stock: 1193EEF-CX0D391R Datasheet

DirectRFQ

EEF-SX0D391ER

Panasonic Electronic ComponentsIn Stock: 11874EEF-SX0D391ER Datasheet

DirectRFQ

EEF-SX0E391ER

Panasonic Electronic ComponentsIn Stock: 7350EEF-SX0E391ER Datasheet

UpgradeRFQ

EEF-SX0D391E4

Panasonic Electronic ComponentsIn Stock: 7351EEF-SX0D391E4 Datasheet

SimilarRFQ

EEF-SX0D391XE

Panasonic Electronic ComponentsIn Stock: 5978EEF-SX0D391XE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility is determined by the following critical parameters:

Electrical Matching Criteria:

• Capacitance: 390 µF (exact match required)
• Voltage - Rated: 2 V or higher (direct equivalent or upgrade)
• Tolerance: ±20% (must match or be tighter)
• Type: Polymer (material class match required)

Mechanical Matching Criteria:

• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)

Additional Compatibility Factors:

• Operating Temperature Range: substitute must support -40°C minimum and 105°C maximum
• RoHS Compliance: must maintain ROHS3 compliance status

Substitutes are grouped as follows:

Direct Equivalents (Same Voltage): Parts maintaining the exact 2 V rated voltage specification with improved reliability characteristics (higher ESR ratings, longer operational lifetime, or reduced ESR for enhanced ripple current handling).

Upgrade Equivalent (Higher Voltage): Parts with higher rated voltage (2.5 V) that maintain all other specifications, offering improved voltage margin for circuit operation while remaining mechanically and electrically compatible.

Parameter Comparison

Engineering Selection Recommendations

Primary Replacement (Direct Equivalent): EEF-SX0D391ER from Panasonic is the recommended direct substitute for the SPSX391M02R. This part maintains identical capacitance, voltage rating, and ESR specifications while offering improved reliability through doubled operational lifetime (2000 Hrs vs. 1000 Hrs @ 105°C). Both parts hold active status with ROHS3 compliance, ensuring continued manufacturing availability and regulatory compliance.

Alternative Direct Equivalent: EEF-CX0D391R from Panasonic provides another active equivalent with identical electrical specifications and ROHS3 compliance. This variant features higher ESR (15 mOhm) but demonstrates enhanced ripple current capability (5.1 A @ 100 kHz).

Performance Enhancement Options: For applications requiring reduced ESR and higher ripple current handling, EEF-SX0D391E4 offers 4.5 mOhm ESR with 8.5 A ripple current capacity at 100 kHz, or EEF-SX0D391XE with 6 mOhm ESR and 7.5 A capability. Both maintain the 2 V rating and are active products with ROHS3 compliance.

Voltage Upgrade Alternative: EEF-SX0E391ER provides a higher rated voltage (2.5 V) while maintaining all other specifications of EEF-SX0D391ER, suitable for applications requiring increased voltage margin without any dimensional change.

All substitute parts share identical package dimensions and mounting characteristics, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D391ER be used as a direct replacement for SPSX391M02R? A: Yes. EEF-SX0D391ER provides direct electrical and mechanical compatibility. Both parts specify 390 µF capacitance, 2 V rated voltage, ±20% tolerance, 9 mOhm ESR, identical package geometry (2917/7343 Metric), and surface mount configuration. EEF-SX0D391ER is an active product, ensuring continued availability.

Q: What is the difference between the substitute parts? A: All substitutes maintain the same 390 µF, 2 V electrical core specification and 2917 package configuration. Primary differences lie in ESR values (ranging from 4.5 to 15 mOhm), operational lifetime (all active parts offer 2000 Hrs @ 105°C vs. the original 1000 Hrs), and ripple current ratings. EEF-SX0E391ER differs by offering a higher 2.5 V rated voltage.

Q: Are these parts mechanically compatible without PCB redesign? A: Yes. All substitute parts utilize the identical 2917 (7343 Metric) package and surface mount land pattern (0.287" L x 0.169" W / 7.30 mm x 4.30 mm). Mounted height varies slightly (1.90 mm to 2.10 mm) but remains compatible with standard PCB assembly clearances.

Q: Which substitute offers the lowest ESR? A: EEF-SX0D391E4 provides the lowest ESR at 4.5 mOhm and the highest ripple current rating at 8.5 A @ 100 kHz, making it suitable for applications requiring minimal thermal dissipation and high transient current handling.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the compliance status of the original SPSX391M02R.

Q: What temperature range should I consider for substitution? A: The SPSX391M02R operates from -40°C to 105°C. All Panasonic substitutes extend the lower operating temperature to -55°C while maintaining the 105°C upper limit, providing improved thermal margin in cold environment applications.

Q: Is the 2.5 V rated EEF-SX0E391ER suitable for a 2 V application? A: Yes. The EEF-SX0E391ER is rated for 2.5 V operation and is fully compatible with circuits designed for 2 V capacitors. The higher voltage rating provides additional safety margin without affecting circuit function.