Equivalent & Substitute Parts for 4SW220MX

Part Overview

The Rubycon 4SW220MX is a 220 µF, 4 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Organizations using this part in existing designs or maintenance applications require qualified substitute options that maintain electrical and mechanical compatibility while potentially offering improved availability or performance characteristics.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	4 V
Type	Aluminum Polymer
Package	2917 (7343 Metric)
ESR	9 mOhm
Lifetime	2000 Hrs @ 105°C
Operating Temperature Range	-55°C to 105°C
Tolerance	±20%
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 4SW220MX is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Capacitance value: 220 µF (exact match required)
Package type: 2917 (7343 Metric) (physical and land pattern compatibility)
Mounting type: Surface Mount (assembly process compatibility)
Tolerance: ±20% (electrical specification match)
Operating temperature range: -55°C to 105°C minimum (thermal envelope)
Type: Aluminum Polymer (dielectric material class)

Allowable Variation Parameters:

Voltage rating: May exceed 4 V (higher voltage rating provides backward compatibility in 4 V applications)
ESR: May vary within acceptable limits for the application
Lifetime: May exceed 2000 Hrs @ 105°C specification
Product status: Active status preferred for new procurement

The Panasonic EEF-CX0J221R qualifies as a substitute based on matching all mandatory criteria while offering higher voltage rating (6.3 V) and improved availability through Active product status.

Parameter Comparison

Parameter	4SW220MX (Rubycon)	EEF-CX0J221R (Panasonic)	Compatibility
Capacitance	220 µF	220 µF	Exact Match
Voltage Rating	4 V	6.3 V	Compatible (higher rating)
Tolerance	±20%	±20%	Exact Match
Type	Aluminum Polymer	Aluminum Polymer	Exact Match
Package	2917 (7343 Metric)	2917 (7343 Metric)	Exact Match
ESR	9 mOhm	15 mOhm	Compatible (within polymer capacitor range)
Lifetime @ 105°C	2000 Hrs	2000 Hrs	Exact Match
Operating Temperature	-55°C to 105°C	-55°C to 105°C	Exact Match
Mounting Type	Surface Mount	Surface Mount	Exact Match
Height (Seated Max)	0.114" (2.90 mm)	0.075" (1.90 mm)	Compatible (lower profile)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
Product Status	Not For New Designs	Active	Substitute offers active status

Engineering Selection Recommendations

The Panasonic EEF-CX0J221R is qualified as a direct substitute for the Rubycon 4SW220MX based on the following engineering criteria:

Electrical Compatibility: Both components share identical capacitance (220 µF), tolerance (±20%), and thermal lifetime specifications (2000 Hrs @ 105°C). The EEF-CX0J221R's higher voltage rating (6.3 V versus 4 V) ensures full backward compatibility in applications designed for the 4 V part.

Physical Compatibility: Both parts utilize the 2917 (7343 Metric) package with identical footprint dimensions (0.287" L × 0.169" W). The EEF-CX0J221R features a lower seated height (0.075" versus 0.114"), which may provide design advantages in space-constrained applications without requiring PCB redesign.

Compliance and Availability: The EEF-CX0J221R maintains ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. Active product status ensures long-term availability and supply chain stability compared to the Not For New Designs status of the 4SW220MX.

ESR Consideration: The EEF-CX0J221R exhibits 15 mOhm ESR compared to the 4SW220MX's 9 mOhm. This difference remains within acceptable parameters for general-purpose aluminum polymer capacitor applications and does not preclude substitution.

Frequently Asked Questions (FAQ)

Q: Can the EEF-CX0J221R replace the 4SW220MX in existing designs?

A: Yes. The EEF-CX0J221R meets all mandatory compatibility criteria: identical capacitance (220 µF), package (2917 Metric), tolerance (±20%), and operating temperature range (-55°C to 105°C). The higher voltage rating (6.3 V) provides additional design margin in 4 V applications.

Q: What is the significance of the voltage rating difference?

A: The EEF-CX0J221R's 6.3 V rating exceeds the 4SW220MX's 4 V specification. In applications operating at or below 4 V, the higher-rated component functions identically while providing improved reliability margin. No circuit modification is required.

Q: Are there physical installation differences?

A: Both parts use the 2917 (7343 Metric) package with identical footprint dimensions. The EEF-CX0J221R's lower seated height (1.90 mm versus 2.90 mm) may provide clearance advantages but does not require PCB redesign. Existing land patterns are compatible.

Q: How does ESR affect substitution suitability?

A: The EEF-CX0J221R's 15 mOhm ESR versus the 4SW220MX's 9 mOhm represents a 67% increase. For general-purpose applications, this difference remains within acceptable aluminum polymer capacitor performance ranges. Applications with specific ESR requirements should verify compatibility with circuit simulation or testing.

Q: Why is product status relevant for component selection?

A: The 4SW220MX's Not For New Designs status indicates the manufacturer no longer recommends it for new applications and may discontinue production. The EEF-CX0J221R's Active status ensures continued availability, supply chain stability, and manufacturer support for existing and future procurement.

Q: Are packaging formats interchangeable?

A: The 4SW220MX is supplied in Tape & Reel (TR) format, while the EEF-CX0J221R is available in Cut Tape (CT) & Digi-Reel format. Both formats are compatible with standard surface mount assembly equipment. Format selection depends on production volume and assembly process requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message