Rubycon 2.5SWZ270MR09 Equivalent & Substitute Parts

Part Overview

The Rubycon 2.5SWZ270MR09 is a 270 µF aluminum polymer capacitor rated at 2.5 V, designed for general-purpose applications requiring low equivalent series resistance and stable performance across extended temperature ranges. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The part operates reliably from -55°C to 105°C with a rated lifetime of 2000 hours at 105°C.

Substiute Parts

2.5SWZ270MR09

RubyconIn Stock: 7822.5SWZ270MR09 Datasheet

Current PartRFQ

EEF-CX0G271R

Panasonic Electronic ComponentsIn Stock: 11387EEF-CX0G271R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Rubycon 2.5SWZ270MR09 is determined by the following critical parameters:

Mandatory 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)
• Physical Dimensions: 7.30 mm L x 4.30 mm W, 1.90 mm height maximum (exact match required)
• Type: Aluminum Polymer (exact match required)

Allowable Parameter Variations:

• Voltage Rating: May be equal to or greater than 2.5 V (higher voltage ratings are acceptable in applications where circuit voltage does not exceed the original specification)
• ESR: May be equal to or lower than 9 mOhm (lower ESR values provide improved performance)
• Ripple Current: May be equal to or greater than 3 A @ 100 kHz (higher ripple current capability is acceptable)
• Lifetime @ Temperature: May be equal to or greater than 2000 Hrs @ 105°C (extended lifetime is acceptable)
• Operating Temperature Range: Must encompass or match -55°C to 105°C
• RoHS and Compliance Status: Must maintain ROHS3 compliance

Parameter Comparison

Engineering Selection Recommendations

The Panasonic EEF-CX0G271R serves as a direct substitute for the obsolete Rubycon 2.5SWZ270MR09 based on the following engineering criteria:

Compliance and Availability: The Panasonic part maintains ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original component. The substitute is classified as active product status, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: The substitute part maintains identical capacitance (270 µF), tolerance (±20%), and operating temperature range (-55°C to 105°C). The 4 V voltage rating exceeds the original 2.5 V specification, providing design margin in applications where circuit voltage does not exceed 2.5 V. The higher ripple current capability (5.1 A versus 3 A at 100 kHz) and extended thermal lifetime (2000 Hrs @ 105°C) represent performance improvements.

Physical and Mechanical Compatibility: The substitute maintains identical package designation (2917 / 7343 Metric), surface mount mounting type, and physical dimensions (7.30 mm x 4.30 mm x 1.90 mm maximum height), ensuring direct PCB footprint compatibility without layout modifications.

Performance Consideration: The substitute exhibits higher ESR (15 mOhm versus 9 mOhm). In applications where ESR is a critical design parameter, this variation must be evaluated against circuit requirements. The higher ESR remains within acceptable ranges for general-purpose aluminum polymer capacitor applications.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic EEF-CX0G271R be used as a direct replacement for the Rubycon 2.5SWZ270MR09?

A: Yes. The substitute part matches all mandatory parameters including capacitance, tolerance, package type, physical dimensions, and mounting configuration. The higher voltage rating (4 V) and improved ripple current capability (5.1 A) are acceptable variations for applications operating at or below 2.5 V.

Q: What is the significance of the voltage rating difference (2.5 V versus 4 V)?

A: The substitute part's 4 V rating exceeds the original specification. In applications where the circuit voltage does not exceed 2.5 V, the higher-rated part operates safely with additional voltage margin. The actual operating voltage of the circuit determines whether this variation is acceptable; the substitute cannot be used in applications requiring operation above 4 V.

Q: Does the higher ESR (15 mOhm) of the substitute affect circuit performance?

A: The ESR difference (15 mOhm versus 9 mOhm) must be evaluated against specific circuit requirements. For general-purpose applications, this variation is typically acceptable. Applications with strict ESR requirements (such as high-frequency switching circuits or low-noise power supplies) require detailed circuit analysis to confirm compatibility.

Q: Are the physical dimensions and PCB footprint identical?

A: Yes. Both parts use the 2917 (7343 Metric) package with identical dimensions of 7.30 mm length, 4.30 mm width, and 1.90 mm maximum seated height. No PCB layout modifications are required for substitution.

Q: What is the product status difference, and why does it matter?

A: The original Rubycon part is classified as obsolete, indicating discontinued production and limited availability. The Panasonic substitute is classified as active product, ensuring ongoing manufacturing and supply chain availability for future production runs and design support.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the original Rubycon 2.5SWZ270MR09 and the Panasonic EEF-CX0G271R are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.