SLP391M350C9P3 Equivalent & Substitute Parts

Part Overview

The SLP391M350C9P3 is a 390 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the SLP0712TE series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures. The part is currently active in production with 1004 units in stock.

Substitute parts are identified when equivalent capacitance and voltage ratings are available from alternative manufacturers, provided that mechanical compatibility, thermal performance, and regulatory compliance remain within acceptable parameters for the application.

Substiute Parts

SLP391M350C9P3

Cornell Dubilier Electronics (CDE)In Stock: 1028SLP391M350C9P3 Datasheet

Current PartRFQ

400MXG390MEFCSN25X50

RubyconIn Stock: 1029400MXG390MEFCSN25X50 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SLP391M350C9P3 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Capacitance: 390 µF (exact match required)
• Tolerance: ±20% (standard tolerance class)
• Voltage Rating: Equal to or greater than 350 V
• Mounting Type: Through Hole
• Package Style: Radial, Can - Snap-In
• Lead Spacing: 10.00 mm
• Physical Dimensions: 25.00 mm diameter, 52.00 mm height maximum
• Operating Temperature Range: -25°C to 105°C minimum
• Lifetime: 3000 Hrs @ 105°C minimum
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The Rubycon 400MXG390MEFCSN25X50 meets all mandatory criteria with an elevated voltage rating of 400 V, providing additional voltage margin while maintaining identical mechanical and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

The Rubycon 400MXG390MEFCSN25X50 is a direct substitute for the Cornell Dubilier SLP391M350C9P3. Both parts are active products with current manufacturing status and full ROHS3 compliance. The substitute part maintains identical mechanical dimensions, thermal performance specifications, and regulatory certifications.

The elevated voltage rating of 400 V on the Rubycon part provides additional operational margin compared to the 350 V rating of the original part. This higher voltage rating does not compromise compatibility in applications designed for 350 V operation, as the substitute part operates safely within the original design envelope.

Both parts are classified as MSL Level 1 (Unlimited moisture sensitivity), indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the Rubycon 400MXG390MEFCSN25X50 be used as a direct replacement for the SLP391M350C9P3?

A: Yes. The Rubycon part is mechanically and electrically compatible. Both parts share identical capacitance (390 µF), tolerance (±20%), physical dimensions (25.00 mm diameter, 52.00 mm height, 10.00 mm lead spacing), mounting type (through-hole snap-in), and thermal specifications (3000 Hrs @ 105°C). The substitute part's 400 V rating exceeds the original 350 V specification, providing additional voltage margin.

Q: What is the significance of the higher voltage rating on the substitute part?

A: The 400 V rating on the Rubycon part provides a 50 V margin above the original 350 V specification. This higher rating does not alter the part's performance in 350 V applications; it simply indicates the part is rated for operation at higher voltages. The substitute part remains fully compatible with circuits designed for 350 V operation.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts have a 25.00 mm diameter, 52.00 mm maximum seated height, and 10.00 mm lead spacing. The parts are mechanically interchangeable in snap-in mounting applications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SLP391M350C9P3 and 400MXG390MEFCSN25X50 are ROHS3 compliant and REACH unaffected. Both parts carry MSL Level 1 (Unlimited) moisture sensitivity classification, requiring no special moisture handling during storage or assembly.

Q: What thermal performance specifications apply to both parts?

A: Both parts are rated for 3000 hours of operation at 105°C and operate across the temperature range of -25°C to 105°C. Thermal performance characteristics are identical between the two parts.