SPA181M02B Equivalent & Substitute Parts

Part Overview

The SPA181M02B 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. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this capacitor specification.

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

Substitution of the SPA181M02B is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

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

Secondary Compatibility Parameters:

Voltage Rating: 2 V minimum (equal or higher voltage ratings are acceptable for direct substitution)
Operating Temperature Range: Must encompass or exceed -40°C ~ 105°C
Lifetime @ Temperature: Must meet or exceed 1000 Hrs @ 105°C
RoHS Compliance: ROHS3 Compliant (required)

Substitute parts are grouped into two categories: direct equivalents (matching 2 V voltage rating) and upgrades (higher voltage ratings with identical electrical and mechanical specifications).

Parameter Comparison

Parameter	SPA181M02B (Main)	EEF-SX0D181ER	EEF-SX0D181R	EEF-SX0E181ER	EEF-SX0E181R	EEF-SX0G181ER
Manufacturer	Cornell Dubilier Electronics	Panasonic	Panasonic	Panasonic	Panasonic	Panasonic
Capacitance	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF
Voltage Rating	2 V	2 V	2 V	2.5 V	2.5 V	4 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Type	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer
ESR	9 mOhm	9 mOhm	9 mOhm	9 mOhm	9 mOhm	9 mOhm
Lifetime @ 105°C	1000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 100 kHz	3 A	6.3 A	Not specified	6.3 A	Not specified	6.3 A
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Not For New Designs	Active	Not For New Designs	Active

Engineering Selection Recommendations

Direct Equivalents (2 V Rating):

EEF-SX0D181ER is the primary recommended substitute for the SPA181M02B. This part maintains identical electrical specifications (180 µF, 2 V, ±20%, 9 mOhm ESR) and mechanical compatibility (2917 package, surface mount). The EEF-SX0D181ER carries Active product status, ensuring ongoing availability and manufacturing support. The component demonstrates improved performance characteristics with 2000 Hrs @ 105°C lifetime rating compared to the original 1000 Hrs specification, and an extended operating temperature range of -55°C ~ 105°C. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

EEF-SX0D181R provides an alternative direct equivalent with identical electrical and mechanical specifications. However, this part carries Not For New Designs status, limiting its suitability for new product development. This option is appropriate for legacy system maintenance and repair applications where existing inventory is available.

Upgrade Options (Higher Voltage Ratings):

EEF-SX0E181ER (2.5 V) and EEF-SX0G181ER (4 V) are voltage-upgraded variants maintaining all other electrical and mechanical parameters. These parts are suitable for applications where the circuit design permits higher voltage ratings. Both carry Active product status and meet all compliance requirements. The 4 V variant (EEF-SX0G181ER) provides maximum design margin for voltage transient protection.

EEF-SX0E181R (2.5 V) is available with Not For New Designs status and should be reserved for legacy applications only.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D181ER directly replace SPA181M02B without circuit modification?

A: Yes. The EEF-SX0D181ER maintains identical capacitance (180 µF), voltage rating (2 V), tolerance (±20%), ESR (9 mOhm), and package dimensions (2917 / 7343 Metric). The component is pin-compatible and electrically equivalent for direct substitution on the PCB.

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

A: Both parts are electrically and mechanically identical. The primary distinction is product status: EEF-SX0D181ER is Active (recommended for new designs), while EEF-SX0D181R is Not For New Designs (suitable for legacy support only). For new product development, EEF-SX0D181ER is the specified choice.

Q: Can I use the 4 V variant (EEF-SX0G181ER) instead of the 2 V original?

A: Yes. The EEF-SX0G181ER is electrically and mechanically compatible with the SPA181M02B. The higher voltage rating (4 V vs. 2 V) provides additional design margin and does not compromise circuit functionality in applications rated for 2 V operation. The component maintains identical capacitance, tolerance, ESR, and package specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (EEF-SX0D181ER, EEF-SX0D181R, EEF-SX0E181ER, EEF-SX0E181R, EEF-SX0G181ER) are ROHS3 compliant, matching the compliance status of the original SPA181M02B.

Q: What is the advantage of the 2000 Hrs @ 105°C lifetime rating in substitute parts?

A: The substitute parts provide doubled operational lifetime (2000 Hrs vs. 1000 Hrs) at elevated temperature, indicating improved reliability and extended service life in thermal stress conditions. This enhancement does not affect electrical performance but provides greater margin for long-term reliability in demanding applications.

Q: Are there physical dimension differences between the original and substitute parts?

A: The primary dimension specifications are identical: 0.287" L x 0.169" W (7.30mm x 4.30mm) footprint and 2917 (7343 Metric) package. Minor height variations exist (0.075" max for original vs. 0.079" max for substitutes), which remain within standard PCB assembly tolerances and do not affect mounting compatibility.

Q: Which substitute part should I specify for new product designs?

A: For new designs, specify EEF-SX0D181ER (2 V direct equivalent with Active status) or EEF-SX0G181ER (4 V upgrade with Active status). Both parts ensure long-term supply chain support and manufacturing continuity. The selection between 2 V and 4 V variants depends on circuit voltage requirements and design margin preferences.

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