Rubycon 4SWZ180MR09 Equivalent & Substitute Parts

Part Overview

The Rubycon 4SWZ180MR09 is a 180 µF, 4 V aluminum polymer surface mount capacitor in the 2917 (7343 Metric) package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part delivers 9 mOhm ESR with a 2000-hour lifetime rating at 105°C, suitable for general-purpose applications requiring stable capacitance in compact form factors.

Key Parameters

Parameter	Value
Capacitance	180 µF
Voltage Rating	4 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	9 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C to 105°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Physical Dimensions	7.30 mm L × 4.30 mm W
Maximum Height	1.90 mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the 4SWZ180MR09 is determined by strict equivalence across the following critical parameters:

Capacitance value: 180 µF (exact match required)
Voltage rating: 4 V (exact match required)
Tolerance: ±20% (exact match required)
Technology: Aluminum polymer (exact match required)
Package: 2917 (7343 Metric) surface mount (exact match required)
Operating temperature range: -55°C to 105°C (exact match or better required)
ESR: 9 mOhm (exact match required)
Lifetime: 2000 Hrs @ 105°C (exact match or better required)

The Panasonic EEF-SX0G181ER meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain continuity.

Parameter Comparison

Parameter	Rubycon 4SWZ180MR09	Panasonic EEF-SX0G181ER	Match Status
Manufacturer Part Number	4SWZ180MR09	EEF-SX0G181ER	Different
Capacitance	180 µF	180 µF	Equivalent
Voltage Rating	4 V	4 V	Equivalent
Tolerance	±20%	±20%	Equivalent
Type	Aluminum Polymer	Aluminum Polymer	Equivalent
ESR @ 100 kHz	9 mOhm	9 mOhm	Equivalent
Lifetime @ 105°C	2000 Hrs	2000 Hrs	Equivalent
Operating Temperature	-55°C to 105°C	-55°C to 105°C	Equivalent
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Physical Dimensions	7.30 mm × 4.30 mm	7.30 mm × 4.30 mm	Equivalent
Maximum Height	1.90 mm	2.00 mm	Compatible
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Obsolete	Active	Substitute is active
Ripple Current @ 100 kHz	3 A	6.3 A	Substitute exceeds

Engineering Selection Recommendations

The Panasonic EEF-SX0G181ER is the qualified substitute for the obsolete Rubycon 4SWZ180MR09. Selection is based on the following engineering factors:

All critical electrical parameters match exactly: capacitance, voltage rating, tolerance, ESR, and lifetime specifications.
Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements.
The Panasonic part is classified as active product status, ensuring long-term availability and supply chain reliability.
Physical dimensions are equivalent with compatible height specifications (2.00 mm vs. 1.90 mm maximum seated height).
The Panasonic substitute provides superior ripple current capability (6.3 A vs. 3 A @ 100 kHz), offering enhanced performance margin.
Both components share identical package designation (2917 / 7343 Metric) and surface mount configuration, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic EEF-SX0G181ER be used as a direct replacement for the Rubycon 4SWZ180MR09?

A: Yes. The EEF-SX0G181ER meets all electrical and mechanical specifications required for direct substitution. Capacitance, voltage rating, tolerance, ESR, lifetime, operating temperature range, and package dimensions are equivalent. PCB layout and assembly processes require no modification.

Q: What is the primary reason for substitution?

A: The Rubycon 4SWZ180MR09 is classified as obsolete. The Panasonic EEF-SX0G181ER is an active product with confirmed long-term availability, making it the appropriate choice for new designs and ongoing production.

Q: Are there any height compatibility concerns?

A: The Panasonic part has a maximum seated height of 2.00 mm compared to 1.90 mm for the Rubycon part. This 0.10 mm difference is within standard PCB assembly tolerances and does not affect mechanical clearance or electrical performance in typical applications.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the Rubycon 4SWZ180MR09 and Panasonic EEF-SX0G181ER are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference in ripple current ratings?

A: The Panasonic EEF-SX0G181ER is rated for 6.3 A ripple current at 100 kHz, compared to 3 A for the Rubycon part. This represents superior performance capability and provides additional design margin for applications with high-frequency ripple current demands.

Q: Are packaging options different between the two parts?

A: The Rubycon 4SWZ180MR09 is supplied in standard packaging. The Panasonic EEF-SX0G181ER is available in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly operations.

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