SPCX331M0ER Equivalent & Substitute Parts Reference

Part Overview

The SPCX331M0ER 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, indicating discontinued production and limited availability. The part features 15 mOhm equivalent series resistance (ESR) and a rated lifetime of 1000 hours at 105°C, suitable for general-purpose applications requiring compact form factors and low impedance characteristics.

Due to obsolete status and finite inventory, identifying equivalent substitute parts from active manufacturers ensures design continuity and supply chain reliability. Substitute parts must maintain electrical compatibility across capacitance, voltage rating, tolerance, and mechanical dimensions while meeting or exceeding performance specifications.

Key Parameters

Parameter	SPCX331M0ER	Unit
Capacitance	330	µF
Voltage - Rated	2.5	V
Tolerance	±20%	%
Type	Polymer
ESR (Equivalent Series Resistance)	15	mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Package / Case	2917 (7343 Metric)
Size / Dimension	7.30mm L x 4.30mm W	mm
Height - Seated (Max)	1.90	mm
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

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

Performance Enhancement Parameters (Substitutes may exceed original specifications):

ESR: Substitute parts may feature lower ESR values, improving ripple current handling and thermal performance
Lifetime @ Temperature: Substitute parts may exceed 1000 Hrs @ 105°C, extending operational reliability
Operating Temperature Range: Substitute parts may extend lower temperature limit below -40°C
Ripple Current @ High Frequency: Substitute parts may exceed original specifications

All identified substitute parts meet or exceed the mandatory equivalence criteria. Panasonic Electronic Components SP-Cap series parts (CX and SX lines) provide direct functional replacement with enhanced performance characteristics and active product status.

Parameter Comparison

Parameter	SPCX331M0ER (Original)	EEF-CX0E331R	EEF-CX0E331XR	EEF-SX0E331ER	EEF-SX0E331R	EEF-SX0E331XE	EEF-SX0E331XR
Manufacturer	Cornell Dubilier Electronics	Panasonic	Panasonic	Panasonic	Panasonic	Panasonic	Panasonic
Capacitance (µF)	330	330	330	330	330	330	330
Voltage Rating (V)	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Type	Polymer	Polymer	Polymer	Polymer	Polymer	Polymer	Polymer
ESR (mOhm)	15	15	12	9	9	6	6
Lifetime @ 105°C (Hrs)	1000	2000	2000	2000	2000	2000	2000
Operating Temperature Range	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 100 kHz (A)	2.7	5.1	Not specified	6.3	Not specified	7.5	Not specified
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Size / Dimension (mm)	7.30 L x 4.30 W	7.30 L x 4.30 W	7.30 L x 4.30 W	7.30 L x 4.30 W	7.30 L x 4.30 W	7.30 L x 4.30 W	7.30 L x 4.30 W
Height - Seated Max (mm)	1.90	1.90	1.90	2.00	2.00	2.00	2.00
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging	Not specified	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Recommendation: EEF-SX0E331XE

The EEF-SX0E331XE is the optimal substitute for SPCX331M0ER applications. This part maintains full electrical and mechanical equivalence while delivering superior performance characteristics:

Active product status ensures long-term supply chain availability and manufacturing continuity
Doubled lifetime specification (2000 Hrs @ 105°C vs. 1000 Hrs) provides enhanced reliability margin
Lowest ESR value (6 mOhm) among all substitutes, reducing thermal dissipation and improving ripple current handling (7.5 A @ 100 kHz)
Extended operating temperature range (-55°C ~ 105°C) accommodates broader environmental conditions
ROHS3 and REACH compliance maintained
Highest inventory availability (121,660 Pcs) ensures procurement reliability

Secondary Recommendation: EEF-CX0E331XR

The EEF-CX0E331XR provides direct substitution with active product status and enhanced specifications:

Active product status with substantial inventory (7,767 Pcs)
Reduced ESR (12 mOhm) compared to original part
Doubled lifetime specification (2000 Hrs @ 105°C)
Extended operating temperature range (-55°C ~ 105°C)
Identical seated height (1.90 mm) to original part, minimizing PCB layout modifications

Alternative Recommendation: EEF-CX0E331R

The EEF-CX0E331R serves as a functional equivalent with active product status:

Active product status with high inventory (13,655 Pcs)
Maintains original ESR specification (15 mOhm)
Doubled lifetime specification (2000 Hrs @ 105°C)
Extended operating temperature range (-55°C ~ 105°C)
Identical seated height (1.90 mm) to original part

Not Recommended for New Designs:

EEF-SX0E331R and EEF-SX0E331XR carry "Not For New Designs" status and should be avoided in new product development despite functional equivalence. These parts are suitable only for legacy system maintenance or repair applications where existing inventory exists.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0E331XE be used as a direct replacement for SPCX331M0ER without PCB modifications?

A: The EEF-SX0E331XE maintains identical length (7.30 mm) and width (4.30 mm) dimensions. The seated height increases from 1.90 mm to 2.00 mm. PCB layout verification is required to confirm clearance compatibility. If the original design includes height-constrained routing or components, this 0.10 mm increase must be evaluated against available vertical space.

Q: What is the significance of ESR reduction in substitute parts?

A: Lower ESR values directly reduce impedance across the frequency spectrum, improving ripple current capacity and thermal performance. The EEF-SX0E331XE (6 mOhm) handles 7.5 A ripple current at 100 kHz compared to 2.7 A for the original part. This enhancement reduces heat generation and extends component lifetime in high-frequency switching applications.

Q: Are all substitute parts RoHS3 and REACH compliant?

A: All identified substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original SPCX331M0ER specifications. Environmental and regulatory requirements are satisfied across all substitutes.

Q: Why do some substitute parts have different seated heights?

A: Panasonic SP-Cap SX series parts (EEF-SX0E331ER, EEF-SX0E331R, EEF-SX0E331XE, EEF-SX0E331XR) feature 2.00 mm maximum seated height, while SP-Cap CX series parts (EEF-CX0E331R, EEF-CX0E331XR) maintain 1.90 mm height matching the original part. This dimensional difference reflects internal construction variations between product lines. PCB layout clearance must be verified for SX series substitutes.

Q: What is the difference between "Active" and "Not For New Designs" product status?

A: "Active" status indicates the manufacturer continues production and supports long-term supply. "Not For New Designs" status indicates the manufacturer maintains existing inventory but does not recommend these parts for new product development. For new designs, select only parts with "Active" status to ensure supply continuity and manufacturer support.

Q: Can substitute parts with higher lifetime ratings be used in applications originally designed for 1000 Hrs @ 105°C?

A: Yes. All substitute parts with 2000 Hrs @ 105°C lifetime ratings exceed the original specification and provide enhanced reliability. Higher lifetime ratings indicate improved thermal stability and extended operational capability. No design modifications are required; the substitutes simply provide additional performance margin.

Q: Is packaging format (Tape & Reel) compatible with existing assembly processes?

A: All substitute parts are supplied in Tape & Reel (TR) format, standard for automated surface mount assembly. Verify that existing pick-and-place equipment and tape specifications (pitch, pocket size, sprocket hole configuration) are compatible with Panasonic SP-Cap packaging. Standard 2917 package tape specifications should align with existing assembly processes.

Q: What inventory considerations apply when selecting between substitute parts?

A: EEF-SX0E331XE offers the highest inventory availability (121,660 Pcs), ensuring immediate procurement and supply security. EEF-CX0E331R (13,655 Pcs) and EEF-CX0E331XR (7,767 Pcs) provide substantial secondary options. For high-volume production, EEF-SX0E331XE inventory levels support extended manufacturing runs without supply interruption.

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