SPSX331M0ER-4 Equivalent & Substitute Parts

Part Overview

The SPSX331M0ER-4 is a 330 µF, 2.5 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The part delivers 4.5 mOhm equivalent series resistance with a rated lifetime of 1000 hours at 105°C and supports ripple current of 4 A at 100 kHz. Due to its obsolete status, active production alternatives with identical or superior electrical and mechanical characteristics are required for new designs and component replenishment.

Substiute Parts

SPSX331M0ER-4

Cornell Dubilier Electronics (CDE)In Stock: 1058SPSX331M0ER-4 Datasheet

Current PartRFQ

EEF-LX0E331R4

Panasonic Electronic ComponentsIn Stock: 8863EEF-LX0E331R4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPSX331M0ER-4 is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Capacitance value: 330 µF (exact match required)
• Voltage rating: 2.5 V (substitute must equal or exceed)
• Tolerance: ±20% (exact match required)
• ESR: 4.5 mOhm (exact match required for electrical performance)
• Package: 2917 (7343 Metric) (exact match required for PCB compatibility)
• Mounting type: Surface Mount (exact match required)
• Dielectric type: Aluminum Polymer (exact match required)

Secondary Compatibility Parameters:

• Operating temperature range: substitute must cover or exceed -40°C ~ 105°C
• Lifetime rating: substitute should meet or exceed 1000 Hrs @ 105°C
• Ripple current capability: substitute should meet or exceed 4 A @ 100 kHz
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

The EEF-LX0E331R4 from Panasonic Electronic Components meets all critical matching parameters and exceeds secondary performance specifications, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The EEF-LX0E331R4 is the qualified substitute for the obsolete SPSX331M0ER-4 based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly: 330 µF capacitance, 2.5 V voltage rating, ±20% tolerance, and 4.5 mOhm ESR. These specifications ensure direct functional replacement without circuit redesign.

Mechanical Compatibility: Both parts use the identical 2917 (7343 Metric) surface mount package with matching footprint dimensions (0.287" L x 0.169" W). The EEF-LX0E331R4 features a lower seated height (0.079" versus 0.083"), providing improved PCB clearance without compromising compatibility.

Performance Enhancement: The substitute part exceeds the original specification in three key areas: operating temperature range extends to -55°C (versus -40°C minimum), lifetime rating doubles to 2000 hours at 105°C, and ripple current capability increases to 8.5 A at 100 kHz. These improvements enhance system reliability without introducing incompatibility.

Regulatory Compliance: Both parts maintain ROHS3 compliance, satisfying environmental and regulatory requirements. The EEF-LX0E331R4 carries active product status from Panasonic, ensuring long-term availability and supply chain continuity.

Procurement Status: The EEF-LX0E331R4 is currently in active production with 8809 pieces available in inventory, compared to the obsolete SPSX331M0ER-4 with limited remaining stock of 954 pieces.

Frequently Asked Questions (FAQ)

Q: Can the EEF-LX0E331R4 be used as a direct replacement for the SPSX331M0ER-4 without PCB modifications?

A: Yes. Both parts share identical electrical specifications (330 µF, 2.5 V, ±20%, 4.5 mOhm ESR) and the same 2917 (7343 Metric) surface mount package with matching footprint dimensions. No PCB layout changes are required.

Q: What is the significance of the lower seated height on the EEF-LX0E331R4?

A: The EEF-LX0E331R4 has a maximum seated height of 0.079" compared to 0.083" for the SPSX331M0ER-4. This 0.004" reduction provides additional clearance for adjacent components or enclosure constraints without affecting electrical performance or compatibility.

Q: Does the higher ripple current rating of the EEF-LX0E331R4 affect circuit behavior?

A: No. The substitute part's 8.5 A ripple current capability at 100 kHz exceeds the original 4 A specification. This provides additional thermal margin and reliability in high-frequency applications but does not alter circuit operation when used in applications designed for the original part.

Q: Are there packaging differences between the two parts?

A: The SPSX331M0ER-4 is supplied in standard packaging, while the EEF-LX0E331R4 is supplied in Tape & Reel (TR) format. Both are suitable for automated assembly processes. Tape & Reel packaging is standard for high-volume production and does not affect component performance.

Q: Why does the EEF-LX0E331R4 have a wider operating temperature range?

A: The EEF-LX0E331R4 extends the lower operating limit to -55°C (versus -40°C for the original part). This expanded range reflects Panasonic's polymer capacitor design and provides additional thermal margin for applications in cold environments, though the original -40°C minimum remains adequate for most general-purpose applications.

Q: Is the doubled lifetime rating of the EEF-LX0E331R4 relevant for my application?

A: The 2000-hour lifetime at 105°C for the substitute part versus 1000 hours for the original indicates improved long-term reliability. This is particularly beneficial for applications requiring extended operational life or operating continuously at elevated temperatures. For applications with shorter duty cycles or lower ambient temperatures, both ratings are adequate.

Q: What is the impact of the ±20% tolerance on substitution?

A: Both parts carry identical ±20% tolerance specifications. This tolerance applies to the capacitance value and must be accounted for in circuit design. The tolerance does not affect substitution compatibility, as both parts operate within the same acceptable range.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant. The EEF-LX0E331R4 additionally carries REACH Unaffected status. Both parts share the same ECCN (EAR99) and HTSUS (8532.22.0020) classifications, ensuring equivalent regulatory treatment.