Equivalent & Substitute Parts for 2SW390M2.9X7.3

Part Overview

The 2SW390M2.9X7.3 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 a maximum seated height of 2.90 mm and an ESR of 9 mOhm. The part is rated for 2000 hours at 105°C and operates across a temperature range of -55°C to 105°C.

The 2SW390M2.9X7.3 carries a "Not For New Designs" status, indicating that Rubycon has discontinued or phased out this component for new applications. This necessitates identifying functionally equivalent substitute parts that maintain electrical and mechanical compatibility while offering active product status and continued availability.

Substiute Parts

2SW390M2.9X7.3

RubyconIn Stock: 11942SW390M2.9X7.3 Datasheet

Current PartRFQ

EEF-SX0D391ER

Panasonic Electronic ComponentsIn Stock: 11874EEF-SX0D391ER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2SW390M2.9X7.3 is determined by strict equivalence across the following electrical and mechanical parameters:

• Capacitance value: 390 µF (exact match required)
• Voltage rating: 2 V (exact match required)
• Tolerance: ±20% (exact match required)
• Component type: Aluminum Polymer (exact match required)
• 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) (exact match required)
• Mounting type: Surface Mount (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

The EEF-SX0D391ER from Panasonic Electronic Components meets all substitution criteria and is classified as an equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The EEF-SX0D391ER is a direct electrical equivalent to the 2SW390M2.9X7.3 and is recommended as the primary substitute. The Panasonic part carries Active product status, ensuring continued availability and supply chain reliability compared to the Rubycon part's "Not For New Designs" designation.

Both parts maintain identical electrical specifications: 390 µF capacitance, 2 V voltage rating, ±20% tolerance, 9 mOhm ESR, and 2000-hour lifetime at 105°C. Both are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

A mechanical consideration exists: the EEF-SX0D391ER has a maximum seated height of 2.00 mm compared to the 2SW390M2.9X7.3 at 2.90 mm. This 0.90 mm height reduction may provide design benefits in space-constrained applications and does not compromise electrical performance or thermal management.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0D391ER be used as a direct replacement for the 2SW390M2.9X7.3?

A: Yes. Both parts share identical electrical specifications: 390 µF capacitance, 2 V voltage rating, ±20% tolerance, 9 mOhm ESR, and 2000-hour lifetime at 105°C. Both are housed in the 2917 (7343 Metric) package with identical footprint dimensions of 7.30 mm × 4.30 mm. The parts are electrically and mechanically compatible for direct substitution.

Q: What is the difference in height between these two parts?

A: The 2SW390M2.9X7.3 has a maximum seated height of 2.90 mm, while the EEF-SX0D391ER measures 2.00 mm. The Panasonic part is 0.90 mm shorter. This height difference may be advantageous in applications with limited vertical clearance and does not affect electrical performance.

Q: Why is the 2SW390M2.9X7.3 marked "Not For New Designs"?

A: This designation indicates that Rubycon has discontinued or phased out this component for new product development. The EEF-SX0D391ER from Panasonic carries Active status, confirming ongoing production and supply availability.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 2SW390M2.9X7.3 and EEF-SX0D391ER are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided your PCB layout accommodates the height difference. The EEF-SX0D391ER's reduced height of 2.00 mm versus the original 2.90 mm will not cause clearance issues in most applications. Verify that your design does not rely on the original part's height for mechanical support or spacing.