SPA271M02B Equivalent & Substitute Parts Reference

Part Overview

The SPA271M02B is a 270 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 part features a 7 mOhm equivalent series resistance (ESR) and supports a 1000-hour lifetime rating at 105°C with a ripple current capability of 3.5 A at 100 kHz.

Due to its obsolete status, identifying functionally equivalent substitute parts is necessary for ongoing design support, maintenance, and new production requirements. Substitute parts must maintain compatibility across critical electrical and mechanical parameters while meeting current component availability and compliance standards.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	270	µF	Critical - must match exactly
Voltage Rating	2	V	Critical - minimum requirement
Tolerance	±20%	%	Critical - must match or be tighter
Package / Case	2917 (7343 Metric)	-	Critical - PCB footprint compatibility
Mounting Type	Surface Mount	-	Critical - assembly process compatibility
ESR (Equivalent Series Resistance)	7	mOhm	Important - affects circuit performance
Operating Temperature Range	-40°C ~ 105°C	°C	Important - thermal environment compatibility
Lifetime @ Temperature	1000	Hrs @ 105°C	Important - reliability specification
Ripple Current @ 100 kHz	3.5	A	Important - thermal stress capability
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the SPA271M02B are grouped based on strict adherence to the following critical parameters:

Critical Matching Parameters:

Capacitance: 270 µF (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

Voltage Rating: Equal to or greater than 2 V (higher voltage ratings are acceptable)
ESR: Variations permitted within circuit design margins
Lifetime @ Temperature: Equal to or greater than 1000 Hrs @ 105°C
Operating Temperature Range: Equal to or broader than -40°C ~ 105°C
Ripple Current: Equal to or greater than 3.5 A @ 100 kHz

All substitute parts listed are Panasonic Electronic Components aluminum polymer capacitors that maintain identical capacitance, tolerance, package, and mounting specifications while offering improvements in thermal performance, ESR characteristics, or voltage rating headroom.

Parameter Comparison

Parameter	SPA271M02B (CDE)	EEF-SX0E271E7 (Panasonic)	EEF-SX0D271E4 (Panasonic)	EEF-SX0D271ER (Panasonic)	EEF-SX0D271R (Panasonic)	EEF-SX0D271XE (Panasonic)	EEF-CX0D271XR (Panasonic)
Capacitance	270 µF	270 µF	270 µF	270 µF	270 µF	270 µF	270 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage Rating	2 V	2.5 V	2 V	2 V	2 V	2 V	2 V
ESR	7 mOhm	7 mOhm	4.5 mOhm	9 mOhm	9 mOhm	6 mOhm	12 mOhm
Lifetime @ 105°C	1000 Hrs	2000 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	-55°C ~ 105°C
Ripple Current @ 100 kHz	3.5 A	7 A	8.5 A	6.3 A	Not specified	7.5 A	5.6 A
Package / Case	2917 (7343 Metric)	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	Surface Mount
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: EEF-SX0D271E4

The EEF-SX0D271E4 is the optimal substitute for the SPA271M02B. This part maintains all critical electrical and mechanical parameters while providing significant improvements in reliability and performance. The 4.5 mOhm ESR is superior to the original 7 mOhm specification, reducing thermal dissipation and improving circuit efficiency. The 2000-hour lifetime at 105°C doubles the original specification, and the 8.5 A ripple current capability at 100 kHz exceeds the original 3.5 A requirement. The part is in active production status with full ROHS3 compliance and REACH unaffected certification. Inventory availability is substantial at 12,764 pieces.

Secondary Recommendation: EEF-SX0D271XE

The EEF-SX0D271XE provides an alternative with a 6 mOhm ESR, positioned between the original specification and the primary recommendation. This part offers improved ESR performance while maintaining identical voltage and capacitance ratings. The 7.5 A ripple current capability and 2000-hour lifetime meet or exceed all original specifications. Active production status and full compliance certifications apply. Inventory is available at 1,035 pieces.

Tertiary Recommendation: EEF-SX0E271E7

The EEF-SX0E271E7 offers a higher voltage rating of 2.5 V, providing additional design margin for applications where voltage headroom is beneficial. The 7 mOhm ESR matches the original specification exactly. The 2000-hour lifetime and 7 A ripple current capability represent significant improvements. This part is in active production with full compliance certifications. Inventory availability is 1,206 pieces.

Alternative Consideration: EEF-CX0D271XR

The EEF-CX0D271XR maintains identical voltage and capacitance specifications with a 12 mOhm ESR. While the ESR is higher than the original, it remains within acceptable ranges for general-purpose applications. This part is in active production with full compliance certifications and 920 pieces in inventory.

Not Recommended for New Designs: EEF-SX0D271R

The EEF-SX0D271R carries a "Not For New Designs" product status designation. While it meets all critical electrical and mechanical parameters, this status indicates Panasonic's recommendation against use in new design implementations. This part should be reserved for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0D271E4 be used as a direct replacement for the SPA271M02B?

A: Yes. The EEF-SX0D271E4 maintains identical capacitance (270 µF), tolerance (±20%), voltage rating (2 V), package (2917 / 7343 Metric), and mounting type (Surface Mount). The part is electrically and mechanically compatible with the original design. The improved ESR, lifetime rating, and ripple current capability represent performance enhancements with no negative impact on circuit operation.

Q: What is the significance of the voltage rating difference between the SPA271M02B (2 V) and the EEF-SX0E271E7 (2.5 V)?

A: A higher voltage rating provides additional design margin and does not create compatibility issues. The EEF-SX0E271E7 can be used in any application designed for the 2 V SPA271M02B. The higher voltage rating indicates the part can withstand greater electrical stress, which is beneficial for circuit reliability. No circuit modifications are required.

Q: How do ESR variations affect circuit performance?

A: ESR (Equivalent Series Resistance) affects thermal dissipation and voltage ripple characteristics. Lower ESR values reduce heat generation and improve voltage stability under ripple current conditions. The SPA271M02B specifies 7 mOhm ESR. Substitute parts with lower ESR values (such as the EEF-SX0D271E4 at 4.5 mOhm) provide improved performance. Substitute parts with higher ESR values (such as the EEF-CX0D271XR at 12 mOhm) remain acceptable for general-purpose applications but generate more heat.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant. The original SPA271M02B is also ROHS3 compliant. No compliance issues arise from substitution.

Q: What does "Not For New Designs" status mean for the EEF-SX0D271R?

A: "Not For New Designs" indicates that the manufacturer (Panasonic) recommends against using this part in new product development. The part remains available for legacy system support and maintenance. For new designs, select from parts with "Active" product status: EEF-SX0D271E4, EEF-SX0D271ER, EEF-SX0D271XE, or EEF-SX0E271E7.

Q: Can substitute parts be mixed in the same assembly?

A: Yes. All substitute parts maintain identical electrical and mechanical specifications for the critical parameters (capacitance, tolerance, voltage, package, mounting type). Multiple substitute parts can be used in the same assembly without compatibility issues. However, using a single part number throughout an assembly simplifies inventory management and traceability.

Q: How does the 2000-hour lifetime rating compare to the original 1000-hour specification?

A: All substitute parts offer a 2000-hour lifetime at 105°C, which is double the original SPA271M02B specification. This improvement indicates enhanced reliability and extended operational life under thermal stress. The higher lifetime rating provides greater design margin for applications requiring extended service life or operating in elevated temperature environments.

Q: Are there any height or dimensional differences between the SPA271M02B and substitute parts?

A: The SPA271M02B has a maximum seated height of 0.110" (2.80 mm). Most substitute parts have a maximum seated height of 0.079" (2.00 mm), which is lower. The EEF-SX0E271E7 also has a maximum seated height of 0.079" (2.00 mm). Lower height is beneficial for space-constrained applications and does not create compatibility issues. All parts maintain identical footprint dimensions (0.287" L x 0.169" W / 7.30 mm x 4.30 mm).

Q: What inventory considerations apply to substitute part selection?

A: The EEF-SX0D271E4 has the highest inventory availability at 12,764 pieces, making it the most readily available substitute. The EEF-SX0D271ER has 11,559 pieces available. The EEF-SX0D271R has 10,711 pieces available. The EEF-SX0E271E7 has 1,206 pieces available. The EEF-SX0D271XE has 1,035 pieces available. The EEF-CX0D271XR has 920 pieces available. For high-volume production requirements, the EEF-SX0D271E4 is the preferred choice based on inventory depth.

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