EEF-CX0D271XR Equivalent & Substitute Parts

Part Overview

The EEF-CX0D271XR is a 270 µF, 2 V aluminum polymer surface mount capacitor manufactured by Panasonic Electronic Components in the SP-Cap CX series. This component is actively produced and designed for general purpose applications requiring low ESR characteristics in compact 2917 (7343 Metric) packaging. Substitute parts are necessary when addressing supply constraints, performance optimization requirements, or design revisions that benefit from alternative ESR specifications or improved ripple current ratings within the same electrical and mechanical parameters.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	2 V
Tolerance	±20%
Type	Aluminum Polymer
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 105°C
Lifetime @ Temperature	2000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-CX0D271XR is determined by strict equivalence in the following parameters: capacitance (270 µF), voltage rating (2 V), tolerance (±20%), package type (2917 / 7343 Metric), mounting method (Surface Mount), operating temperature range (-55°C to 105°C), and lifetime rating (2000 Hrs @ 105°C). All substitute parts listed maintain these core electrical and mechanical specifications. Variations in ESR (Equivalent Series Resistance) and ripple current ratings are secondary performance characteristics that do not disqualify substitution but may influence selection based on application requirements. All substitute parts are manufactured by Panasonic Electronic Components and comply with ROHS3 and REACH standards.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	ESR (mOhm)	Ripple Current @ 100 kHz	Height (Max)	Product Status	Inventory
EEF-CX0D271XR	SP-Cap CX	270 µF	2 V	12	5.6 A	0.075" (1.90mm)	Active	920 Pcs
EEF-SX0D271E4	SP-Cap SX	270 µF	2 V	4.5	8.5 A	0.079" (2.00mm)	Active	12764 Pcs
EEF-SX0D271ER	SP-Cap SX	270 µF	2 V	9	6.3 A	0.079" (2.00mm)	Active	11559 Pcs
EEF-SX0D271R	SP-Cap SX	270 µF	2 V	9	Not Specified	0.079" (2.00mm)	Not For New Designs	10711 Pcs

Engineering Selection Recommendations

The EEF-CX0D271XR remains the primary selection for new designs given its Active product status. The SP-Cap SX series substitutes (EEF-SX0D271E4, EEF-SX0D271ER, EEF-SX0D271R) are electrically and mechanically equivalent and maintain full ROHS3 and REACH compliance. EEF-SX0D271E4 offers superior ESR performance (4.5 mOhm) and higher ripple current capability (8.5 A @ 100 kHz) with significantly greater inventory availability. EEF-SX0D271ER provides intermediate ESR (9 mOhm) and ripple current (6.3 A @ 100 kHz) characteristics. EEF-SX0D271R carries a "Not For New Designs" status and should be reserved for legacy system support or maintenance applications only. All substitute parts accommodate the same PCB land pattern and mounting footprint, with a maximum height variance of 0.004" (0.10mm) that remains within standard assembly tolerances.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D271E4 be used as a direct replacement for EEF-CX0D271XR?

A: Yes. Both parts share identical capacitance (270 µF), voltage rating (2 V), tolerance (±20%), package type (2917 / 7343 Metric), and operating specifications. The EEF-SX0D271E4 features lower ESR (4.5 mOhm vs. 12 mOhm) and higher ripple current capability, making it functionally superior for most applications.

Q: What is the height difference between the main part and substitute parts?

A: The EEF-CX0D271XR has a maximum seated height of 0.075" (1.90mm). The SP-Cap SX series substitutes have a maximum seated height of 0.079" (2.00mm), a difference of 0.004" (0.10mm). This variance is within standard PCB assembly tolerances and does not affect compatibility.

Q: Are all substitute parts suitable for new designs?

A: EEF-SX0D271E4 and EEF-SX0D271ER carry Active product status and are suitable for new designs. EEF-SX0D271R is marked "Not For New Designs" and should not be selected for new applications.

Q: How do ESR differences affect circuit performance?

A: ESR (Equivalent Series Resistance) influences voltage ripple, thermal dissipation, and transient response. Lower ESR values reduce ripple voltage and heat generation. The EEF-SX0D271E4 (4.5 mOhm) provides superior performance compared to the main part (12 mOhm) in high-frequency ripple current applications.

Q: Are all parts RoHS and REACH compliant?

A: Yes. All parts listed are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

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