EEF-UD0E331R Equivalent & Substitute Parts

Part Overview

The EEF-UD0E331R is a 330 µF, 2.5 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part is classified as Obsolete, indicating it is no longer in active production. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain reliability, and meet current manufacturing compliance standards.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	2.5 V
Tolerance	±20%
Type	Aluminum Polymer
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
ESR (Equivalent Series Resistance)	15 mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C

Substitute Part Grouping Explanation

Substitution for the EEF-UD0E331R is determined by strict equivalence in 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)
Mounting Type: Surface Mount (exact match required)
Type: Aluminum Polymer (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in ESR, lifetime rating, and operating temperature range are permitted within the scope of direct substitution, as these represent performance enhancements or extended operational capabilities rather than functional incompatibilities.

Parameter Comparison

Part Number	Series	Status	Capacitance	Voltage	ESR (mOhm)	Lifetime @ 105°C	Temp. Range	Height (Max)	Packaging
EEF-UD0E331R	SP-Cap UD	Obsolete	330 µF	2.5 V	15	1000 Hrs	-40°C ~ 105°C	3.00 mm	-
EEF-CX0E331R	SP-Cap CX	Active	330 µF	2.5 V	15	2000 Hrs	-55°C ~ 105°C	1.90 mm	Tape & Reel
EEF-CX0E331XR	SP-Cap CX	Active	330 µF	2.5 V	12	2000 Hrs	-55°C ~ 105°C	1.90 mm	Tape & Reel
EEF-SX0E331ER	SP-Cap SX	Active	330 µF	2.5 V	9	2000 Hrs	-55°C ~ 105°C	2.00 mm	Tape & Reel
EEF-SX0E331R	SP-Cap SX	Not For New Designs	330 µF	2.5 V	9	2000 Hrs	-55°C ~ 105°C	2.00 mm	Tape & Reel
EEF-SX0E331XE	SP-Cap SX	Active	330 µF	2.5 V	6	2000 Hrs	-55°C ~ 105°C	2.00 mm	Tape & Reel
EEF-SX0E331XR	SP-Cap SX	Not For New Designs	330 µF	2.5 V	6	2000 Hrs	-55°C ~ 105°C	2.00 mm	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation for New Designs: EEF-SX0E331XE

This part is classified as Active and represents the current generation of the SP-Cap SX series. It provides the lowest ESR (6 mOhm), extended lifetime (2000 Hrs @ 105°C), and expanded operating temperature range (-55°C ~ 105°C). It is ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

Alternative for Active Status: EEF-CX0E331R

This part is Active and offers a direct ESR match (15 mOhm) to the original EEF-UD0E331R, with doubled lifetime rating (2000 Hrs @ 105°C) and extended temperature range. It is ROHS3 Compliant and REACH Unaffected.

Not Recommended for New Designs: EEF-SX0E331R and EEF-SX0E331XR

These parts carry "Not For New Designs" status and should not be selected for new applications, despite their technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0E331XE directly replace EEF-UD0E331R in existing designs?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (2.5 V), tolerance (±20%), package (2917 / 7343 Metric), and mounting type (Surface Mount). The EEF-SX0E331XE offers improved performance with lower ESR and extended lifetime.

Q: What is the significance of the height difference between substitute parts?

A: The EEF-CX0E331R has a maximum seated height of 1.90 mm, while EEF-SX series parts measure 2.00 mm. Both are within the 2917 package specification. PCB layout and clearance requirements must be evaluated for your specific application.

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

A: Lower ESR values represent improved electrical performance and reduced heat generation. Parts with 6 mOhm or 9 mOhm ESR are direct functional substitutes for the 15 mOhm original, offering enhanced ripple current handling and thermal characteristics.

Q: Are all substitute parts RoHS and REACH compliant?

A: All Active and Not For New Designs substitute parts listed are ROHS3 Compliant and REACH Unaffected. The original EEF-UD0E331R compliance status is not specified in the provided data.

Q: What does "Not For New Designs" status mean?

A: Parts with this designation are functionally equivalent but are being phased out by the manufacturer. They remain available for existing production but should not be selected for new product development.

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