SPSX331M02R Equivalent & Substitute Parts Reference

Part Overview

The SPSX331M02R is a 330 µF, 2 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, indicating it is no longer in active production. The part features a 9 mOhm equivalent series resistance (ESR) and supports a 1000-hour lifetime rating at 105°C with a 3 A ripple current capability at 100 kHz.

Due to its obsolete status, sourcing replacement units from the original manufacturer is no longer viable for new procurement or long-term supply chain planning. Equivalent and substitute parts from active manufacturers provide functional alternatives that maintain electrical and mechanical compatibility while offering improved availability and extended product lifecycles.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	330	µF	Critical - Must match exactly
Voltage Rating	2	V	Critical - Minimum acceptable rating
Tolerance	±20%	%	Critical - Must match or be tighter
Package / Case	2917 (7343 Metric)	-	Critical - PCB footprint compatibility
Mounting Type	Surface Mount	-	Critical - Assembly process compatibility
ESR (Equivalent Series Resistance)	9	mOhm	Important - Affects circuit performance
Operating Temperature Range	-40°C ~ 105°C	°C	Important - Application environment
Lifetime @ Temperature	1000	Hrs @ 105°C	Important - Reliability specification
Ripple Current @ 100 kHz	3	A	Important - Power handling capability
RoHS Status	ROHS3 Compliant	-	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitution logic for the SPSX331M02R is based on strict electrical and mechanical parameter matching within the aluminum polymer capacitor category. All substitute parts must satisfy the following criteria:

Critical Matching Parameters:

Capacitance value of 330 µF (exact match required)
Voltage rating of 2 V or higher (2 V minimum acceptable)
Tolerance of ±20% or tighter
Package / Case designation of 2917 (7343 Metric)
Surface Mount mounting type
RoHS3 compliance

Performance Parameters (Acceptable Ranges):

ESR: 3 mOhm to 15 mOhm (lower ESR indicates improved performance)
Operating Temperature Range: Must include -40°C to 105°C minimum
Lifetime @ 105°C: 1000 hours or greater (extended lifetime acceptable)
Ripple Current @ 100 kHz: 3 A or greater (higher current capability acceptable)

Substitution Categories:

Direct Equivalents (Same Voltage Rating - 2V): Parts with identical 2 V voltage rating, matching all critical parameters, and equivalent or improved electrical performance characteristics.

Voltage Upgrades (2.5V Rating): Parts with elevated voltage rating (2.5 V) that maintain all other critical parameters. These provide enhanced voltage margin and are electrically compatible in 2 V applications.

Performance Variants (Same Voltage - Different ESR/Ripple Current): Parts with 2 V rating and identical critical parameters but different ESR values and ripple current ratings, reflecting different internal construction or manufacturing series.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	ESR (mOhm)	Lifetime @ 105°C (Hrs)	Ripple Current @ 100 kHz (A)	Operating Temp (°C)	Product Status	Height (mm)
SPSX331M02R	Cornell Dubilier Electronics	330	2	9	1000	3	-40 ~ 105	Obsolete	2.10
EEF-SX0D331ER	Panasonic	330	2	9	2000	6.3	-55 ~ 105	Active	2.00
EEF-SX0D331R	Panasonic	330	2	9	2000	Not Specified	-55 ~ 105	Not For New Designs	2.00
EEF-SX0E331ER	Panasonic	330	2.5	9	2000	6.3	-55 ~ 105	Active	2.00
EEF-SX0E331R	Panasonic	330	2.5	9	2000	Not Specified	-55 ~ 105	Not For New Designs	2.00
ECASD60D337M007K00	Murata Electronics	330	2	7	1000	3.5	-40 ~ 105	Obsolete	2.80
EEF-CX0D331R	Panasonic	330	2	15	2000	5.1	-55 ~ 105	Active	1.90
EEF-GX0D331R	Panasonic	330	2	3	2000	10.2	-55 ~ 105	Active	2.00
EEF-LX0D331R	Panasonic	330	2	6	2000	7.5	-55 ~ 105	Active	2.10
EEF-LX0D331R4	Panasonic	330	2	4.5	2000	8.5	-55 ~ 105	Active	2.10
EEF-SX0D331E4	Panasonic	330	2	4.5	2000	8.5	-55 ~ 105	Active	2.00

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

EEF-SX0D331ER (Panasonic Electronic Components) is the optimal direct substitute for the SPSX331M02R. This part maintains identical electrical specifications (330 µF, 2 V, 9 mOhm ESR, ±20% tolerance) while offering significant advantages: Active product status ensures long-term availability, doubled lifetime rating (2000 hours vs. 1000 hours at 105°C), enhanced ripple current capability (6.3 A vs. 3 A at 100 kHz), and extended operating temperature range (-55°C to 105°C vs. -40°C to 105°C). The 2917 (7343 Metric) package footprint is identical. RoHS3 compliance and Tape & Reel packaging support modern manufacturing processes. Height is marginally reduced (2.00 mm vs. 2.10 mm), which presents no compatibility issues for standard PCB designs.

Alternative Selections Based on Application Requirements:

For Low-ESR Applications: EEF-GX0D331R (Panasonic) provides the lowest ESR at 3 mOhm with the highest ripple current capability (10.2 A at 100 kHz). This variant is suitable for high-frequency switching applications or circuits requiring minimal impedance. Active product status and 2000-hour lifetime support long-term deployment.

For Compact Height Constraint: EEF-CX0D331R (Panasonic) offers the smallest seated height at 1.90 mm while maintaining 2 V rating and 330 µF capacitance. ESR is elevated at 15 mOhm, acceptable for general-purpose applications where space is the limiting factor. Active status and 2000-hour lifetime are maintained.

For Balanced Performance: EEF-LX0D331R4 (Panasonic) provides intermediate ESR (4.5 mOhm) with strong ripple current (8.5 A at 100 kHz) and maintains the original 2.10 mm height. This part balances performance improvements with minimal PCB redesign requirements.

For Voltage-Margin Applications: EEF-SX0E331ER (Panasonic) upgrades the voltage rating to 2.5 V while preserving all other critical parameters (330 µF, 9 mOhm ESR, ±20% tolerance, 2917 package). This selection is appropriate for circuits operating near the 2 V limit or requiring additional safety margin. Active status and 2000-hour lifetime apply.

Parts to Avoid for New Designs: EEF-SX0D331R and EEF-SX0E331R carry "Not For New Designs" status and should not be selected for new product development, despite technical compatibility. ECASD60D337M007K00 (Murata) is obsolete and presents the same supply chain risk as the original part.

Frequently Asked Questions (FAQ)

Q: Can I use EEF-SX0E331ER (2.5 V) as a direct replacement for SPSX331M02R (2 V)?

A: Yes. The 2.5 V rating is electrically compatible in a 2 V application. The higher voltage rating provides additional safety margin and does not affect circuit operation. All other critical parameters (330 µF capacitance, ±20% tolerance, 2917 package, surface mount) are identical. This substitution is valid and often preferred for improved reliability.

Q: What is the difference between EEF-SX0D331ER and EEF-LX0D331R?

A: Both parts maintain 330 µF, 2 V, and 2917 package specifications. The primary differences are ESR and ripple current: EEF-SX0D331ER has 9 mOhm ESR with 6.3 A ripple current, while EEF-LX0D331R has 6 mOhm ESR with 7.5 A ripple current. EEF-LX0D331R offers lower impedance and higher current handling. Selection depends on circuit requirements; both are Active products with 2000-hour lifetimes.

Q: Will the height difference between SPSX331M02R (2.10 mm) and EEF-SX0D331ER (2.00 mm) affect PCB assembly?

A: No. The 0.10 mm height reduction is within standard PCB design tolerances and does not require footprint modification. Surface mount assembly equipment accommodates this variation without adjustment. The 2917 (7343 Metric) package dimensions remain identical.

Q: Why is ECASD60D337M007K00 listed as a similar part if it is obsolete?

A: ECASD60D337M007K00 (Murata) is included for reference purposes only, showing historical alternatives. Its obsolete status makes it unsuitable for new procurement. The part is functionally similar (330 µF, 2 V, 2917 package) but offers no supply chain advantage over the original SPSX331M02R. Active Panasonic alternatives are strongly preferred.

Q: What does "Not For New Designs" status mean for EEF-SX0D331R?

A: "Not For New Designs" indicates the manufacturer is phasing out the part and does not recommend its use in new product development. While technically compatible, this status signals limited future availability and potential supply discontinuation. Active alternatives such as EEF-SX0D331ER should be selected instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, matching the original SPSX331M02R. This ensures compatibility with modern manufacturing standards and regulatory requirements across global markets.

Q: Can I mix different substitute parts in the same circuit board design?

A: Yes, provided all parts meet the circuit's electrical requirements. Mixing parts with different ESR values (e.g., EEF-GX0D331R at 3 mOhm with EEF-CX0D331R at 15 mOhm) is acceptable if the circuit design accounts for impedance variation. For critical applications, using a single part number across the board simplifies procurement and quality control.

Q: What is the significance of the "SP-Cap" series designation in Panasonic part numbers?

A: "SP-Cap" identifies Panasonic's polymer capacitor product line. The letter suffix (SX, LX, CX, GX, EX) indicates the internal construction series, which determines ESR, ripple current, and lifetime characteristics. All SP-Cap variants maintain the same external package dimensions and voltage/capacitance ratings, ensuring mechanical and electrical interchangeability within the specified parameters.

Q: Is Tape & Reel (TR) packaging compatible with my existing assembly process?

A: Tape & Reel is the standard packaging format for surface mount component assembly. All substitute parts listed use TR packaging, which is compatible with automated pick-and-place equipment and standard reflow soldering processes. No process modification is required.

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