SPSX271M02R - Equivalent & Substitute Parts Engineering Reference

Part Overview

The SPSX271M02R is a 270 µF, 2 V aluminum-polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This part is classified as obsolete, necessitating the identification of equivalent substitute components for ongoing design requirements and production continuity. The electrical and mechanical specifications defined by this original component establish the baseline criteria for identifying functionally compatible alternatives.

Key Parameters

Parameter	Value	Unit
Capacitance	270	µF
Voltage Rating	2	V
Tolerance	±20%	—
Type	Aluminum - Polymer	—
Package / Case	2917 (7343 Metric)	—
Mounting Type	Surface Mount	—
ESR (Equivalent Series Resistance)	9	mOhm
Operating Temperature Range	-40 to 105	°C
Lifetime @ Temperature	1000	Hrs @ 105°C
Ripple Current @ 100 kHz	3	A
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	3 (168 Hours)	—

Substitute Part Grouping Explanation

Equivalent and substitute parts for the SPSX271M02R are categorized based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Capacitance: 270 µF
Voltage Rating: 2 V
Tolerance: ±20%
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Type: Aluminum - Polymer

Direct Equivalents maintain all primary substitution criteria with identical or improved electrical performance (ESR, ripple current, lifetime). These parts are functionally interchangeable in the same PCB layout and assembly process.

Similar Substitutes meet all primary substitution criteria but introduce variations in one or more secondary parameters (ESR, operating temperature range, ripple current capacity, or lifetime rating). These parts require design verification to confirm suitability for the specific application.

All substitute parts listed comply with ROHS3 and REACH requirements, matching the regulatory posture of the original component.

Parameter Comparison

Part Number	Manufacturer	Status	Capacitance (µF)	Voltage (V)	ESR (mOhm)	Lifetime @ 105°C (Hrs)	Operating Temp. (°C)	Ripple Current @ 100 kHz (A)	Height (mm)	Package
SPSX271M02R	Cornell Dubilier Electronics	Obsolete	270	2	9	1000	-40 to 105	3	2.10	2917
EEF-SX0D271ER	Panasonic Electronic Components	Active	270	2	9	2000	-55 to 105	6.3	2.00	2917
EEF-SX0D271R	Panasonic Electronic Components	Not For New Designs	270	2	9	2000	-55 to 105	—	2.00	2917
EEF-SX0D271E4	Panasonic Electronic Components	Active	270	2	4.5	2000	-55 to 105	8.5	2.00	2917
EEF-SX0D271XE	Panasonic Electronic Components	Active	270	2	6	2000	-55 to 105	7.5	2.00	2917
EEF-CX0D271XR	Panasonic Electronic Components	Active	270	2	12	2000	-55 to 105	5.6	1.90	2917

Engineering Selection Recommendations

For New Designs: EEF-SX0D271ER is the primary recommended substitute. This part is Active status, maintains electrical equivalence at the primary specification level (capacitance, voltage, tolerance, ESR, package), and provides extended lifetime (2000 Hrs @ 105°C vs. 1000 Hrs). The expanded operating temperature range (-55 to 105°C vs. -40 to 105°C) offers additional design flexibility. This part is ROHS3 compliant and REACH unaffected, matching compliance requirements of the original component.

For Improved Ripple Current Performance: EEF-SX0D271E4 offers the lowest ESR (4.5 mOhm) and highest ripple current capacity (8.5 A @ 100 kHz), providing superior performance in high-frequency switching applications. This part maintains Active status and meets all primary substitution criteria.

For Compact Form Factor: EEF-CX0D271XR provides the smallest seated height (1.90 mm vs. 2.10 mm original), though at the cost of slightly elevated ESR (12 mOhm). This alternative is suitable for space-constrained designs where ripple current requirements remain within acceptable limits (5.6 A @ 100 kHz).

Parts to Avoid for New Designs: EEF-SX0D271R is designated "Not For New Designs" and should not be selected for ongoing product development, though it remains available for legacy production support.

Frequently Asked Questions (FAQ)

Q: Can I use EEF-SX0D271ER as a direct drop-in replacement for SPSX271M02R? A: Yes, within the constraints of your specific application. Both parts share identical capacitance (270 µF), voltage rating (2 V), tolerance (±20%), ESR (9 mOhm), and package (2917). The EEF-SX0D271ER offers improved lifetime (2000 Hrs vs. 1000 Hrs @ 105°C) and expanded operating temperature range (-55 to 105°C vs. -40 to 105°C). PCB land patterns and assembly processes remain compatible.

Q: What is the difference between the EEF-SX and EEF-CX series substitutes? A: Both series are aluminum-polymer 2917 package capacitors with 270 µF / 2 V specifications. The primary electrical difference lies in ESR: EEF-SX series parts exhibit lower ESR values (ranging from 4.5 to 9 mOhm), while the EEF-CX series (represented by EEF-CX0D271XR) shows 12 mOhm ESR. ESR selection impacts ripple current capacity and thermal performance. Series choice depends on your circuit's ripple current requirements.

Q: Why do substitute parts show different ripple current ratings? A: Ripple current capacity correlates directly with ESR and thermal dissipation characteristics. Lower ESR values (EEF-SX0D271E4 at 4.5 mOhm) support higher ripple currents (8.5 A @ 100 kHz), while higher ESR values limit ripple current. Select the substitute part whose ripple current rating meets or exceeds your design requirement.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (EEF-SX0D271ER, EEF-SX0D271R, EEF-SX0D271E4, EEF-SX0D271XE, EEF-CX0D271XR) are ROHS3 compliant and REACH unaffected, maintaining regulatory compatibility with the original SPSX271M02R component.

Q: What is the impact of operating temperature range differences? A: The original SPSX271M02R operates from -40 to 105°C, while Panasonic substitutes operate from -55 to 105°C. The expanded lower temperature limit (-55°C) provides margin for applications exposed to extreme cold environments. This difference does not affect substitution suitability unless your design requires the original -40°C lower limit specifically.

Q: Which substitute should I choose if ripple current is critical to my design? A: Rank substitutes by ripple current capacity: EEF-SX0D271E4 (8.5 A) > EEF-SX0D271XE (7.5 A) > EEF-SX0D271ER (6.3 A) > EEF-CX0D271XR (5.6 A) > SPSX271M02R (3 A). Select the part whose rating meets your application's ripple current specification with appropriate design margin.

Q: Can I mix different substitute parts on the same PCB? A: All listed parts share identical 2917 package geometry and land pattern requirements. From a PCB layout perspective, mixing is physically feasible. However, circuit design should evaluate whether the differing ESR and ripple current characteristics of mixed components will produce acceptable performance in parallel or series configurations.

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