EEF-UD0D331XR Equivalent & Substitute Parts

Part Overview

The EEF-UD0D331XR is a 330 µF, 2 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part operates within the SP-Cap UD series and is classified as obsolete. The 12 mOhm ESR rating and 1000-hour lifetime at 105°C define its performance envelope for general-purpose applications.

Due to obsolete product status, equivalent and substitute parts from active Panasonic series (SP-Cap CX, SP-Cap GX, SP-Cap LX, and SP-Cap SX) are available to maintain design continuity and ensure long-term supply chain reliability.

Key Parameters

Parameter	EEF-UD0D331XR
Capacitance	330 µF
Voltage Rating	2 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	12 mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Size / Dimension	0.287" L x 0.169" W (7.30mm x 4.30mm)
Height - Seated (Max)	0.118" (3.00mm)
Product Status	Obsolete
Type	Polymer
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 2 V or higher (equal or greater voltage rating maintains compatibility)
Tolerance: ±20% (matching tolerance specification)
Package / Case: 2917 (7343 Metric) (identical footprint and mounting type)
Mounting Type: Surface Mount (identical mounting method)
Physical Dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm) (identical land size)

Secondary Performance Parameters (Enhancement Allowed):

ESR: Lower ESR values are acceptable substitutes (improved performance)
Lifetime @ Temperature: Higher lifetime ratings are acceptable substitutes (improved reliability)
Operating Temperature Range: Wider temperature ranges are acceptable substitutes (expanded operating envelope)
Product Status: Active status preferred over obsolete or not-for-new-designs status

Non-Substitutable Parameters:

Capacitance values other than 330 µF (e.g., 390 µF) are classified as similar but not direct substitutes
Voltage ratings below 2 V are not acceptable

Substitute Parts (Direct Equivalents - 330 µF, 2 V, ±20%, 2917 Package):

EEF-CX0E331XR – Upgrade substitute with 2.5 V rating
EEF-CX0D331R – Active equivalent with 15 mOhm ESR
EEF-GX0D331R – Active equivalent with 3 mOhm ESR (lowest ESR option)
EEF-LX0D331R – Active equivalent with 6 mOhm ESR
EEF-LX0D331R4 – Active equivalent with 4.5 mOhm ESR
EEF-SX0D331E4 – Active equivalent with 4.5 mOhm ESR
EEF-SX0D331ER – Active equivalent with 9 mOhm ESR
EEF-SX0D331R – Not-for-new-designs equivalent with 9 mOhm ESR
EEF-SX0D331XE – Active equivalent with 6 mOhm ESR

Similar Parts (Different Capacitance - Not Direct Substitutes):

EEF-CX0D391R – 390 µF, 2 V (capacitance mismatch)

Parameter Comparison

Part Number	Series	Capacitance	Voltage	ESR (mOhm)	Lifetime @ 105°C	Operating Temp Range	Height (Max)	Product Status	Inventory
EEF-UD0D331XR	SP-Cap UD	330 µF	2 V	12	1000 Hrs	-40°C ~ 105°C	0.118" (3.00mm)	Obsolete	1089 Pcs
EEF-CX0E331XR	SP-Cap CX	330 µF	2.5 V	12	2000 Hrs	-55°C ~ 105°C	0.075" (1.90mm)	Active	7767 Pcs
EEF-CX0D331R	SP-Cap CX	330 µF	2 V	15	2000 Hrs	-55°C ~ 105°C	0.075" (1.90mm)	Active	7259 Pcs
EEF-GX0D331R	SP-Cap GX	330 µF	2 V	3	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	18564 Pcs
EEF-LX0D331R	SP-Cap LX	330 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	0.083" (2.10mm)	Active	3811 Pcs
EEF-LX0D331R4	SP-Cap LX	330 µF	2 V	4.5	2000 Hrs	-55°C ~ 105°C	0.083" (2.10mm)	Active	12752 Pcs
EEF-SX0D331E4	SP-Cap SX	330 µF	2 V	4.5	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	45320 Pcs
EEF-SX0D331ER	SP-Cap SX	330 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	7517 Pcs
EEF-SX0D331R	SP-Cap SX	330 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Not For New Designs	8037 Pcs
EEF-SX0D331XE	SP-Cap SX	330 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	4900 Pcs
EEF-CX0D391R	SP-Cap CX	390 µF	2 V	15	2000 Hrs	-55°C ~ 105°C	0.075" (1.90mm)	Active	1171 Pcs

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, Highest Availability):

EEF-SX0D331E4 – Preferred for new designs. Active product status, highest inventory (45,320 pcs), 4.5 mOhm ESR (62.5% reduction from original), 2000-hour lifetime (100% improvement), extended temperature range (-55°C to 105°C), compact height (0.079"), RoHS3 compliant, REACH unaffected.
EEF-GX0D331R – Optimal for low-ESR applications. Active product status, high inventory (18,564 pcs), lowest ESR at 3 mOhm (75% reduction from original), 2000-hour lifetime, extended temperature range, RoHS3 compliant, REACH unaffected.
EEF-LX0D331R4 – Balanced performance option. Active product status, high inventory (12,752 pcs), 4.5 mOhm ESR, 2000-hour lifetime, extended temperature range, RoHS3 compliant, REACH unaffected.

Upgrade Substitute (Higher Voltage Rating):

EEF-CX0E331XR – Voltage upgrade option. Active product status, high inventory (7,767 pcs), 2.5 V rating (25% voltage margin increase), 12 mOhm ESR (matches original), 2000-hour lifetime, extended temperature range, compact height (0.075"), RoHS3 compliant, REACH unaffected.

Not Recommended for New Designs:

EEF-SX0D331R – Product status classified as "Not For New Designs." Use only for legacy system maintenance or repair applications where exact performance matching is required.

Not Direct Substitutes:

EEF-CX0D391R – Capacitance value of 390 µF does not match the 330 µF requirement. This part is classified as similar but not a direct equivalent.

Frequently Asked Questions (FAQ)

Q: Can I use EEF-CX0E331XR as a direct replacement for EEF-UD0D331XR?

A: Yes. EEF-CX0E331XR is a direct substitute with identical capacitance (330 µF), tolerance (±20%), package (2917), and mounting type. The 2.5 V rating provides a 25% voltage margin increase over the original 2 V specification, and the 2000-hour lifetime at 105°C doubles the original 1000-hour rating. Physical dimensions match the required footprint.

Q: What is the difference between EEF-SX0D331E4 and EEF-SX0D331ER?

A: Both parts share identical capacitance (330 µF), voltage (2 V), tolerance (±20%), package (2917), and lifetime (2000 Hrs @ 105°C). The primary difference is ESR: EEF-SX0D331E4 has 4.5 mOhm ESR, while EEF-SX0D331ER has 9 mOhm ESR. EEF-SX0D331E4 is preferred for applications requiring lower impedance and higher ripple current handling (8.5 A @ 100 kHz vs. 6.3 A @ 100 kHz).

Q: Why is EEF-GX0D331R recommended for low-ESR applications?

A: EEF-GX0D331R features the lowest ESR value among all substitutes at 3 mOhm, representing a 75% reduction from the original EEF-UD0D331XR (12 mOhm). This lower ESR improves ripple current handling (10.2 A @ 100 kHz) and reduces heat generation in high-frequency switching applications. Active product status and high inventory (18,564 pcs) ensure supply reliability.

Q: Can I use EEF-CX0D391R as a substitute?

A: No. EEF-CX0D391R has a capacitance value of 390 µF, which does not match the required 330 µF specification. This part is classified as similar but not a direct equivalent. Using a different capacitance value will alter circuit performance and is not recommended without circuit redesign and validation.

Q: What is the height difference between substitute parts, and does it matter?

A: Height variations exist across substitute series: EEF-UD0D331XR (0.118"), EEF-CX series (0.075"), EEF-GX0D331R (0.079"), EEF-LX series (0.083"), and EEF-SX series (0.079"). All parts maintain the identical 0.287" L x 0.169" W (7.30mm x 4.30mm) footprint. Height differences are relevant only if PCB clearance constraints exist above the component. Verify available vertical space in your design before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts (EEF-CX0E331XR, EEF-CX0D331R, EEF-GX0D331R, EEF-LX0D331R, EEF-LX0D331R4, EEF-SX0D331E4, EEF-SX0D331ER, and EEF-SX0D331XE) are RoHS3 compliant and REACH unaffected. The original EEF-UD0D331XR does not list RoHS status in provided specifications.

Q: Should I avoid EEF-SX0D331R?

A: EEF-SX0D331R is classified as "Not For New Designs." This designation indicates the part is in legacy support phase. Use this part only for maintenance, repair, or replacement of existing systems where exact performance matching is critical. For new product development, select from active-status alternatives such as EEF-SX0D331E4 or EEF-SX0D331ER.

Q: What is the operating temperature range difference, and is it important?

A: The original EEF-UD0D331XR operates from -40°C to 105°C. All substitute parts extend the lower temperature limit to -55°C, providing a 15°C wider operating envelope. This expanded range is beneficial for applications in cold environments or equipment with wide ambient temperature requirements. The upper temperature limit (105°C) remains constant across all parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message