2SW390MX Equivalent & Substitute Parts

Part Overview

The 2SW390MX is a 390 µF, 2 V aluminum polymer capacitor manufactured by Rubycon in the PC-CON and SW series. This surface mount component is housed in a 2917 (7343 Metric) package with 9 mOhm equivalent series resistance and a rated lifetime of 2000 hours at 105°C. The part is classified as not for new designs, indicating its legacy status in the product portfolio. Finding equivalent substitute parts is necessary for applications requiring continued supply, design flexibility, or inventory optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

2SW390MX

RubyconIn Stock: 10432SW390MX Datasheet

Current PartRFQ

EEF-SX0D391ER

Panasonic Electronic ComponentsIn Stock: 11874EEF-SX0D391ER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SW390MX is determined by strict equivalence across the following critical parameters:

• Capacitance value: 390 µF (exact match required)
• Voltage rating: 2 V (exact match required)
• Tolerance: ±20% (exact match required)
• Component type: Aluminum polymer capacitor
• ESR: 9 mOhm (exact match required)
• Lifetime rating: 2000 Hrs @ 105°C (exact match required)
• Operating temperature range: -55°C to 105°C (exact match required)
• Package: 2917 (7343 Metric) surface mount (exact match required)

The EEF-SX0D391ER from Panasonic Electronic Components meets all substitution criteria, providing functional and mechanical equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The EEF-SX0D391ER is a direct functional equivalent to the 2SW390MX. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The Panasonic part carries active product status, ensuring continued availability and supply chain stability compared to the Rubycon part, which is designated not for new designs. The EEF-SX0D391ER features a lower seated height (0.079" versus 0.114"), which may provide advantages in space-constrained applications while maintaining all electrical specifications. Both parts are suitable for general purpose applications requiring 390 µF capacitance at 2 V with polymer technology characteristics.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0D391ER replace the 2SW390MX in existing designs?

A: Yes. Both parts share identical electrical specifications (390 µF, 2 V, ±20%, 9 mOhm ESR, 2000 Hrs @ 105°C) and are housed in the same 2917 (7343 Metric) package. The lower seated height of the Panasonic part (0.079" versus 0.114") is a physical advantage that does not affect electrical performance or PCB layout compatibility.

Q: Are there any compliance differences between these parts?

A: No. Both the 2SW390MX and EEF-SX0D391ER are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards.

Q: What is the primary reason to substitute the 2SW390MX?

A: The 2SW390MX is designated not for new designs, indicating legacy status. The EEF-SX0D391ER carries active product status, providing assured long-term availability and supply chain continuity.

Q: Are the physical dimensions identical?

A: The length and width dimensions are identical (0.287" x 0.169" or 7.30 mm x 4.30 mm). The seated height differs: 2SW390MX is 0.114" (2.90 mm) maximum, while EEF-SX0D391ER is 0.079" (2.00 mm) maximum. This difference does not affect standard PCB assembly processes.

Q: What applications are these capacitors suitable for?

A: Both parts are rated for general purpose applications requiring low-voltage, high-capacitance polymer technology with stable performance across the -55°C to 105°C operating range.