EEF-SX0E331XR Equivalent & Substitute Parts

Part Overview

The EEF-SX0E331XR is a 330 µF, 2.5 V aluminum polymer capacitor manufactured by Panasonic Electronic Components in the SP-Cap SX series. This surface mount component is packaged in 2917 (7343 Metric) format with a rated lifetime of 2000 hours at 105°C. The part is designated as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and design updates.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	2.5 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	6 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Type	Polymer
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-SX0E331XR is determined by strict equivalence across the following parameters:

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)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
Lifetime @ Temperature: 2000 Hrs @ 105°C (exact match required)

Substitute parts may vary in ESR (Equivalent Series Resistance), height, and product status. All identified substitutes maintain identical electrical specifications and mechanical compatibility with the original part.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	ESR (mOhm)	Height (mm)	Product Status	Inventory (Pcs)
EEF-SX0E331XR	SP-Cap SX	330 µF	2.5 V	6	2.00	Not For New Designs	2,377
EEF-CX0E331XR	SP-Cap CX	330 µF	2.5 V	12	1.90	Active	7,767
EEF-CX0E331R	SP-Cap CX	330 µF	2.5 V	15	1.90	Active	13,655
EEF-SX0E331ER	SP-Cap SX	330 µF	2.5 V	9	2.00	Active	19,582
EEF-SX0E331R	SP-Cap SX	330 µF	2.5 V	9	2.00	Not For New Designs	14,380
EEF-LX0E331R	SP-Cap LX	330 µF	2.5 V	6	2.00	Active	878
EEF-SX0E331XE	SP-Cap SX	330 µF	2.5 V	6	2.00	Active	121,660

Engineering Selection Recommendations

For new designs and ongoing production requiring replacement of the EEF-SX0E331XR, the following active alternatives are available:

Primary Recommendation: EEF-SX0E331XE (SP-Cap SX series, Active status) provides identical ESR (6 mOhm), matching height (2.00 mm), and maintains the same series designation. This part offers the highest inventory availability (121,660 pcs) and is designated as Active for new designs.

Secondary Recommendation: EEF-SX0E331ER (SP-Cap SX series, Active status) provides lower ESR (9 mOhm) compared to the original part while maintaining identical height and series compatibility. This part is suitable for applications requiring improved performance characteristics.

Alternative from CX Series: EEF-CX0E331XR (SP-Cap CX series, Active status) provides a lower profile (1.90 mm height) with moderate ESR increase (12 mOhm). This option is suitable for space-constrained applications where the reduced height is beneficial.

Parametric Equivalent: EEF-LX0E331R (SP-Cap LX series, Active status) matches the original ESR specification (6 mOhm) and height (2.00 mm) but represents a different series designation. This part is suitable for applications where ESR performance is critical.

All substitute parts maintain ROHS3 compliance and identical electrical specifications (330 µF, 2.5 V, ±20% tolerance, 2000 Hrs @ 105°C lifetime).

Frequently Asked Questions (FAQ)

Q: Can EEF-CX0E331XR be used as a direct replacement for EEF-SX0E331XR?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (2.5 V), tolerance (±20%), package (2917 Metric), and lifetime specifications (2000 Hrs @ 105°C). The EEF-CX0E331XR features a lower profile (1.90 mm vs. 2.00 mm) and higher ESR (12 mOhm vs. 6 mOhm). Verify PCB layout compatibility before substitution.

Q: What is the difference between EEF-SX0E331XR and EEF-SX0E331XE?

A: Both parts are from the SP-Cap SX series with identical electrical specifications and physical dimensions. The primary difference is product status: EEF-SX0E331XR is "Not For New Designs," while EEF-SX0E331XE is "Active." For new designs, EEF-SX0E331XE is the recommended choice.

Q: Why do some substitute parts have different ESR values?

A: ESR variation reflects different internal construction and performance characteristics within the same capacitance and voltage class. All listed substitutes maintain the required 2000-hour lifetime at 105°C. Select based on application requirements for ripple current handling and thermal performance.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are packaged in Tape & Reel (TR) format and use the 2917 (7343 Metric) package case. Physical dimensions are compatible with standard SMD assembly equipment.

Q: Which substitute offers the best availability?

A: EEF-SX0E331XE provides the highest inventory level (121,660 pcs) and is designated as Active for new designs, making it the optimal choice for production continuity.

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