SPSX331M0ER Equivalent & Substitute Parts Reference

Part Overview

The SPSX331M0ER 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, which necessitates identification of equivalent substitute parts for ongoing production and maintenance applications. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 1000 hours at 105°C and an equivalent series resistance (ESR) of 9 mOhm. Substitute parts must maintain electrical compatibility while meeting or exceeding performance specifications.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Capacitance	330	µF	Critical
Voltage Rating	2.5	V	Critical
Tolerance	±20%	%	Critical
Package / Case	2917 (7343 Metric)	—	Critical
Mounting Type	Surface Mount	—	Critical
ESR (Equivalent Series Resistance)	9	mOhm	Performance
Lifetime @ Temperature	1000	Hrs @ 105°C	Performance
Operating Temperature Range	-40 to 105	°C	Performance
Ripple Current @ 100 kHz	3	A	Performance
RoHS Status	ROHS3 Compliant	—	Compliance

Substitute Part Grouping Explanation

Substitution eligibility for the SPSX331M0ER is determined by strict adherence to the following critical parameters:

Critical Parameters (Must Match Exactly):

Capacitance: 330 µF
Voltage Rating: 2.5 V
Tolerance: ±20%
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount

Performance Parameters (Must Meet or Exceed):

ESR: 9 mOhm or lower
Lifetime @ 105°C: 1000 hours or greater
Operating Temperature Range: Must encompass -40°C to 105°C minimum
Ripple Current @ 100 kHz: 3 A or greater

Compliance Parameters:

RoHS3 Compliant
REACH Unaffected

All identified substitute parts are manufactured by Panasonic Electronic Components and belong to the SP-Cap polymer capacitor series. Substitutes are grouped by product status (Active vs. Not For New Designs) and ESR performance tier.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR (mOhm)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Ripple Current @ 100 kHz (A)	Package	Product Status
SPSX331M0ER	Cornell Dubilier Electronics	330	2.5	±20	9	1000	-40 to 105	3	2917 (7343)	Obsolete
EEF-SX0E331ER	Panasonic Electronic Components	330	2.5	±20	9	2000	-55 to 105	6.3	2917 (7343)	Active
EEF-SX0E331R	Panasonic Electronic Components	330	2.5	±20	9	2000	-55 to 105	—	2917 (7343)	Not For New Designs
EEF-CX0E331R	Panasonic Electronic Components	330	2.5	±20	15	2000	-55 to 105	5.1	2917 (7343)	Active
EEF-CX0E331XR	Panasonic Electronic Components	330	2.5	±20	12	2000	-55 to 105	—	2917 (7343)	Active
EEF-SX0E331XE	Panasonic Electronic Components	330	2.5	±20	6	2000	-55 to 105	7.5	2917 (7343)	Active
EEF-SX0E331XR	Panasonic Electronic Components	330	2.5	±20	6	2000	-55 to 105	—	2917 (7343)	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation for New Designs:

EEF-SX0E331ER is the preferred direct substitute. This part maintains identical electrical specifications (330 µF, 2.5 V, ±20%, 9 mOhm ESR) while providing doubled lifetime (2000 hours vs. 1000 hours at 105°C), extended lower temperature operation (-55°C vs. -40°C), and increased ripple current capability (6.3 A vs. 3 A at 100 kHz). Product status is Active, ensuring long-term availability and supply chain stability. RoHS3 compliance and REACH unaffected status are maintained.

Secondary Recommendations (Performance Enhancement):

EEF-SX0E331XE offers superior ESR performance (6 mOhm vs. 9 mOhm) and highest ripple current rating (7.5 A at 100 kHz) among all substitutes. This part is suitable for applications requiring lower impedance or higher current handling. Product status is Active with full compliance certifications.

EEF-CX0E331XR provides mid-range ESR (12 mOhm) with Active product status. This part is suitable where ESR performance between standard and premium tiers is acceptable.

Not Recommended for New Designs:

EEF-SX0E331R and EEF-SX0E331XR carry "Not For New Designs" status and should be used only for legacy system maintenance or repair applications where exact part matching is required.

EEF-CX0E331R exhibits higher ESR (15 mOhm) compared to the original specification (9 mOhm) and should be selected only when lower ESR alternatives are unavailable and circuit design permits the increased impedance.

Frequently Asked Questions (FAQ)

Q: Can EEF-CX0E331R be used as a direct substitute for SPSX331M0ER?

A: EEF-CX0E331R meets all critical parameters (330 µF, 2.5 V, ±20%, 2917 package, surface mount) and exceeds minimum performance requirements (2000 hour lifetime, -55 to 105°C operating range). However, the ESR is 15 mOhm compared to the original 9 mOhm specification. This part is suitable only if circuit design tolerates the increased impedance. For applications sensitive to ESR, EEF-SX0E331ER or EEF-SX0E331XE are preferred.

Q: What is the difference between EEF-SX0E331XE and EEF-SX0E331ER?

A: Both parts share identical capacitance, voltage, tolerance, and package specifications. The primary difference is ESR: EEF-SX0E331XE has 6 mOhm ESR with 7.5 A ripple current capability, while EEF-SX0E331ER has 9 mOhm ESR with 6.3 A ripple current capability. EEF-SX0E331XE is preferred for applications requiring lower impedance or higher ripple current handling. Both are Active products with full compliance.

Q: Why are some substitute parts marked "Not For New Designs"?

A: Parts designated "Not For New Designs" (EEF-SX0E331R and EEF-SX0E331XR) are in mature or declining production phases. These parts remain available for existing inventory and legacy system support but should not be selected for new product development. Active status parts ensure long-term supply chain availability and manufacturing consistency.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (EEF-SX0E331ER, EEF-SX0E331R, EEF-CX0E331R, EEF-CX0E331XR, EEF-SX0E331XE, EEF-SX0E331XR) are RoHS3 compliant and REACH unaffected, matching the compliance status of the original SPSX331M0ER.

Q: Can I use EEF-SX0E331XR in place of EEF-SX0E331XE?

A: Both parts have identical electrical specifications (330 µF, 2.5 V, ±20%, 6 mOhm ESR, 2917 package). However, EEF-SX0E331XR is marked "Not For New Designs" while EEF-SX0E331XE is Active. For new designs, EEF-SX0E331XE is the appropriate choice. EEF-SX0E331XR may be used for legacy system maintenance where exact part matching is required.

Q: What is the physical height difference between substitute parts?

A: The original SPSX331M0ER has a maximum seated height of 0.083" (2.10 mm). Panasonic substitutes have lower profiles: EEF-SX series parts measure 0.079" (2.00 mm) maximum height, while EEF-CX series parts measure 0.075" (1.90 mm) maximum height. These dimensional differences are within typical PCB layout tolerances for surface mount applications and do not affect electrical compatibility.

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