SPSX181M02R Equivalent & Substitute Parts Reference

Part Overview

The SPSX181M02R is a 180 µF, 2 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 it is no longer in active production. Identifying equivalent and substitute parts is necessary to support ongoing maintenance, repair, and legacy system support where this capacitor is specified in existing designs.

Key Parameters

Parameter	Value
Capacitance	180 µF
Voltage Rating	2 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	9 mOhm
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 105°C
Lifetime @ Temperature	1000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SPSX181M02R are grouped based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Capacitance: 180 µF (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Type: Aluminum Polymer (exact match required)
ESR: 9 mOhm (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

Voltage Rating: 2 V minimum (equal or higher voltage ratings are acceptable)
Operating Temperature Range: Must support -40°C ~ 105°C minimum
Lifetime @ Temperature: 1000 Hrs @ 105°C minimum

Grouping Logic:

Group 1 - Direct Equivalents (2 V Rated): Parts that match all primary criteria and maintain the original 2 V voltage specification. These are true drop-in replacements.

Group 2 - Voltage Upgrades (2.5 V and 4 V Rated): Parts that match all primary criteria but feature higher voltage ratings. These are functionally compatible as they provide enhanced voltage margin while maintaining identical physical dimensions and electrical characteristics at the original operating voltage.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR	Package	Lifetime @ 105°C	Operating Temp	Product Status	Packaging Type
SPSX181M02R	Cornell Dubilier Electronics	180 µF	2 V	±20%	9 mOhm	2917 (7343)	1000 Hrs	-40°C ~ 105°C	Obsolete	Bulk
EEF-SX0D181ER	Panasonic	180 µF	2 V	±20%	9 mOhm	2917 (7343)	2000 Hrs	-55°C ~ 105°C	Active	Tape & Reel
EEF-SX0D181R	Panasonic	180 µF	2 V	±20%	9 mOhm	2917 (7343)	2000 Hrs	-55°C ~ 105°C	Not For New Designs	Tape & Reel
EEF-SX0E181ER	Panasonic	180 µF	2.5 V	±20%	9 mOhm	2917 (7343)	2000 Hrs	-55°C ~ 105°C	Active	Tape & Reel
EEF-SX0E181R	Panasonic	180 µF	2.5 V	±20%	9 mOhm	2917 (7343)	2000 Hrs	-55°C ~ 105°C	Not For New Designs	Tape & Reel
EEF-SX0G181ER	Panasonic	180 µF	4 V	±20%	9 mOhm	2917 (7343)	2000 Hrs	-55°C ~ 105°C	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Voltage Specification):

EEF-SX0D181ER is the primary recommended substitute. This part maintains the 2 V voltage rating of the original SPSX181M02R while offering improved specifications: extended lifetime (2000 Hrs vs. 1000 Hrs @ 105°C), expanded operating temperature range (-55°C ~ 105°C vs. -40°C ~ 105°C), and active product status. The part is manufactured by Panasonic Electronic Components and is ROHS3 compliant. Physical dimensions and electrical characteristics are identical to the original specification.

EEF-SX0D181R provides an alternative 2 V equivalent with identical electrical and physical specifications to EEF-SX0D181ER. However, this part carries a "Not For New Designs" status, making it suitable only for legacy system support and repair applications where the original part is no longer available.

For Voltage-Upgraded Applications:

EEF-SX0E181ER (2.5 V rated) and EEF-SX0G181ER (4 V rated) are functionally compatible substitutes that provide higher voltage margins. These parts are suitable for applications where the circuit design permits operation at elevated voltage ratings. Both maintain identical capacitance, tolerance, ESR, package dimensions, and thermal characteristics. EEF-SX0E181ER and EEF-SX0G181ER carry active product status, ensuring long-term availability.

EEF-SX0E181R (2.5 V rated) is a voltage-upgraded alternative with "Not For New Designs" status, appropriate for legacy system support only.

Compliance and Certification:

All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original SPSX181M02R. All parts are classified under ECCN EAR99 and HTSUS 8532.22.0020.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D181ER be used as a direct replacement for SPSX181M02R?

A: Yes. EEF-SX0D181ER is a direct functional equivalent. Both parts share identical capacitance (180 µF), voltage rating (2 V), tolerance (±20%), ESR (9 mOhm), and package (2917 / 7343 Metric). EEF-SX0D181ER offers enhanced reliability with 2000 Hrs lifetime at 105°C compared to 1000 Hrs for the original part, and an expanded operating temperature range of -55°C ~ 105°C.

Q: What is the difference between EEF-SX0D181ER and EEF-SX0D181R?

A: Both parts are electrically and physically identical with 2 V ratings, 180 µF capacitance, and 9 mOhm ESR. The primary difference is product status: EEF-SX0D181ER is active and recommended for new designs and ongoing production, while EEF-SX0D181R is marked "Not For New Designs" and is suitable only for legacy system repair and maintenance.

Q: Can I use a 2.5 V or 4 V rated part instead of the 2 V original?

A: Yes, voltage-upgraded parts (EEF-SX0E181ER at 2.5 V or EEF-SX0G181ER at 4 V) are functionally compatible substitutes. These parts maintain all other electrical and physical specifications while providing higher voltage margin. They are suitable for applications where the circuit design permits operation at the higher voltage rating. Verify that the circuit design does not depend on the specific 2 V voltage characteristic before substitution.

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

A: All substitute parts use the identical 2917 (7343 Metric) surface mount package with matching physical dimensions (0.287" L x 0.169" W, 7.30mm x 4.30mm). However, packaging format differs: the original SPSX181M02R is supplied in bulk, while all Panasonic substitutes are supplied in Tape & Reel (TR) format. Verify that your assembly process accommodates Tape & Reel packaging.

Q: What is the difference in ripple current capability between the original and substitutes?

A: The original SPSX181M02R supports 3 A ripple current at 100 kHz. Panasonic substitutes (EEF-SX0D181ER, EEF-SX0D181R, EEF-SX0E181ER, EEF-SX0E181R, and EEF-SX0G181ER) support 6.3 A ripple current at 100 kHz. This enhanced ripple current capability provides additional design margin and is not a limiting factor for substitution.

Q: Which substitute part should I select for new designs?

A: For new designs, select EEF-SX0D181ER (2 V) if the original voltage specification must be maintained, or EEF-SX0G181ER (4 V) if higher voltage margin is beneficial. Both parts carry active product status and are recommended by the manufacturer for new designs. Avoid parts marked "Not For New Designs" (EEF-SX0D181R and EEF-SX0E181R) for new applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts are ROHS3 compliant, matching the regulatory status of the original SPSX181M02R. All parts are also REACH unaffected.

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