EEF-UD0D331LR Equivalent & Substitute Parts

Part Overview

The EEF-UD0D331LR is a 330 µF, 2 V aluminum polymer surface mount capacitor manufactured by Panasonic Electronic Components in the 2917 (7343 Metric) package. This part operates across -40°C to 105°C with a rated lifetime of 1000 hours at 105°C and belongs to the SP-Cap UD series. The product status is obsolete, making substitute parts necessary for ongoing production and design updates.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	2 V
Tolerance	±20%
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
ESR (Equivalent Series Resistance)	9 mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Type	Polymer

Substitute Part Grouping Explanation

Substitution for the EEF-UD0D331LR is determined by the following mandatory parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 2 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: Polymer (exact match required)

Substitute parts may vary in ESR, lifetime rating, operating temperature range, and product status. Parts with lower ESR values and extended lifetime ratings provide improved performance characteristics. Active product status parts are preferred for new designs over obsolete or "Not For New Designs" designations.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	ESR (mOhm)	Lifetime @ 105°C	Operating Temp Range	Product Status	Inventory (Pcs)
EEF-UD0D331LR	Panasonic	SP-Cap UD	330 µF	2 V	9	1000 Hrs	-40°C ~ 105°C	Obsolete	797
EEF-CX0D331R	Panasonic	SP-Cap CX	330 µF	2 V	15	2000 Hrs	-55°C ~ 105°C	Active	7259
EEF-GX0D331R	Panasonic	SP-Cap GX	330 µF	2 V	3	2000 Hrs	-55°C ~ 105°C	Active	18564
EEF-LX0D331R	Panasonic	SP-Cap LX	330 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	Active	3811
EEF-LX0D331R4	Panasonic	SP-Cap LX	330 µF	2 V	4.5	2000 Hrs	-55°C ~ 105°C	Active	12752
EEF-SX0D331E4	Panasonic	SP-Cap SX	330 µF	2 V	4.5	2000 Hrs	-55°C ~ 105°C	Active	45320
EEF-SX0D331ER	Panasonic	SP-Cap SX	330 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	Active	7517
EEF-SX0D331R	Panasonic	SP-Cap SX	330 µF	2 V	9	2000 Hrs	-55°C ~ 105°C	Not For New Designs	8037
EEF-SX0D331XE	Panasonic	SP-Cap SX	330 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	Active	4900
EEF-SX0D331XR	Panasonic	SP-Cap SX	330 µF	2 V	6	2000 Hrs	-55°C ~ 105°C	Not For New Designs	16536
ECASD60D337M007K00	Murata Electronics	ECAS	330 µF	2 V	7	1000 Hrs	-40°C ~ 105°C	Obsolete	6960

Engineering Selection Recommendations

For replacement of the obsolete EEF-UD0D331LR, the following selection criteria apply:

Active Product Status (Recommended for New Designs):

EEF-GX0D331R: Lowest ESR at 3 mOhm with extended 2000-hour lifetime and -55°C lower temperature bound. Highest inventory availability at 18,564 pieces.
EEF-LX0D331R4: ESR of 4.5 mOhm with 2000-hour lifetime and extended temperature range. Inventory of 12,752 pieces.
EEF-SX0D331E4: ESR of 4.5 mOhm with 2000-hour lifetime. Highest inventory among active parts at 45,320 pieces.
EEF-SX0D331ER: ESR of 9 mOhm (matching original) with 2000-hour lifetime and extended temperature range. Inventory of 7,517 pieces.
EEF-LX0D331R: ESR of 6 mOhm with 2000-hour lifetime. Inventory of 3,811 pieces.
EEF-SX0D331XE: ESR of 6 mOhm with 2000-hour lifetime. Inventory of 4,900 pieces.
EEF-CX0D331R: ESR of 15 mOhm with 2000-hour lifetime and extended temperature range. Inventory of 7,259 pieces.

Not For New Designs (Existing Production Only):

EEF-SX0D331R and EEF-SX0D331XR are restricted to existing production support.

Obsolete Status:

ECASD60D337M007K00 (Murata Electronics) shares obsolete status with the original part. Substitution to active Panasonic parts is preferred.

All substitute parts maintain identical capacitance, voltage rating, tolerance, package, and mounting specifications. Selection should prioritize active product status parts with lower ESR values and extended lifetime ratings for improved reliability and design longevity.

Frequently Asked Questions (FAQ)

Q: Can EEF-UD0D331LR be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts share identical capacitance (330 µF), voltage rating (2 V), tolerance (±20%), package (2917 / 7343 Metric), and surface mount configuration. Physical footprint and electrical interface are compatible.

Q: What is the difference between ESR values in the substitute parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and heat dissipation. Lower ESR values (3–6 mOhm) provide better high-frequency performance and lower thermal generation compared to higher ESR values (9–15 mOhm). Selection depends on circuit ripple current requirements.

Q: Why do some parts have "Not For New Designs" status?

A: Parts designated "Not For New Designs" are in transition toward obsolescence. They remain available for existing production support but should not be selected for new circuit designs. Active status parts are preferred for long-term design stability.

Q: What is the significance of the 2000-hour lifetime rating versus 1000-hour?

A: The 2000-hour lifetime at 105°C indicates extended operational reliability under thermal stress. This doubling of rated lifetime provides greater margin for applications requiring long service intervals or elevated operating temperatures.

Q: Are there temperature range differences between substitutes?

A: Yes. The original EEF-UD0D331LR operates from -40°C to 105°C. Most active substitutes extend the lower bound to -55°C, providing wider operating range for cold-environment applications. ECASD60D337M007K00 maintains the original -40°C lower limit.

Q: Which substitute offers the best overall performance?

A: EEF-GX0D331R combines the lowest ESR (3 mOhm), extended 2000-hour lifetime, widest temperature range (-55°C to 105°C), active product status, and highest inventory availability (18,564 pieces).

Q: Is the Murata part ECASD60D337M007K00 a viable substitute?

A: ECASD60D337M007K00 meets all electrical and mechanical specifications but carries obsolete status. Panasonic active parts are preferred for new designs and ongoing production.

Q: Do all substitutes have the same physical height?

A: No. Heights vary slightly: EEF-UD0D331LR at 3.00 mm, EEF-CX0D331R at 1.90 mm, EEF-GX0D331R at 2.00 mm, EEF-LX0D331R at 2.10 mm, EEF-SX series at 2.00 mm, and ECASD60D337M007K00 at 2.80 mm. Verify PCB clearance requirements before selection.

Q: What packaging formats are available?

A: All substitute parts are supplied in Tape & Reel (TR) format, suitable for automated assembly processes.

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