SLP391M385E9P3

Part Overview

The Cornell Dubilier Electronics SLP391M385E9P3 is a 390 µF, 385 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is classified as Active product status and serves general-purpose applications requiring high-voltage energy storage and filtering in industrial and power conversion systems. Alternative equivalent and substitute parts become necessary when addressing specific application requirements such as higher voltage ratings, extended operational lifetime, or enhanced ripple current handling capabilities within the same physical footprint and electrical specifications.

Substiute Parts

SLP391M385E9P3

Cornell Dubilier Electronics (CDE)In Stock: 932SLP391M385E9P3 Datasheet

Current PartRFQ

381LX391M400K052

Cornell Dubilier Electronics (CDE)In Stock: 1963381LX391M400K052 Datasheet

UpgradeRFQ

450VXG390MEFCSN30X50

RubyconIn Stock: 273855450VXG390MEFCSN30X50 Datasheet

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LGN2W391MELB50

NichiconIn Stock: 500227LGN2W391MELB50 Datasheet

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LGX2W391MELB50

NichiconIn Stock: 1000267LGX2W391MELB50 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLP391M385E9P3 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Capacitance: 390 µF (fixed, non-negotiable)
• Tolerance: ±20% (fixed, non-negotiable)
• Physical Footprint: 1.181" diameter (30.00 mm), 2.047" seated height (52.00 mm), 0.394" lead spacing (10.00 mm)
• Package Type: Radial, Can - Snap-In, Through Hole
• Operating Temperature: -25°C to 105°C
• Polarization: Polar
• Applications: General Purpose

Upgrade Parameters (allowable variance for substitution):

• Voltage Rating: 385 V (original) → 400 V, 450 V (higher voltage ratings acceptable for voltage margin and reliability enhancement)
• Lifetime @ 105°C: 3000 Hrs (original) → 5000 Hrs (extended lifetime acceptable)
• Ripple Current: values scale proportionally with voltage upgrade and lifetime extension
• ESR: specification gaps do not preclude substitution when other parameters match

All substitute parts maintain identical physical dimensions, mounting configuration, and environmental compliance (RoHS3, REACH Unaffected, ECCN EAR99).

Parameter Comparison

Engineering Selection Recommendations

381LX391M400K052 (Cornell Dubilier Electronics): This upgrade substitute provides a 15 V voltage margin increase (400 V vs. 385 V) while maintaining identical physical footprint and CDE series continuity. Active product status and ROHS3 compliance establish this part as a direct upgrade path for existing designs.

450VXG390MEFCSN30X50 (Rubycon VXG Series): This upgrade substitute provides a 65 V voltage margin increase (450 V vs. 385 V) and extended operational lifetime of 5000 Hrs at 105°C versus 3000 Hrs. Enhanced ripple current handling (1.98 A @ 120 Hz) supports designs with higher current loading. Active product status and ROHS3 compliance support applications requiring superior voltage and thermal stress margins.

LGN2W391MELB50 (Nichicon LGN Series): This upgrade substitute provides 450 V voltage rating with standard 3000 Hrs lifetime specification. Nichicon manufacturing heritage and ROHS3 compliance offer alternative sourcing for 390 µF 450 V snap-in capacitor applications.

LGX2W391MELB50 (Nichicon LGX Series): This upgrade substitute provides 450 V voltage rating with extended 5000 Hrs lifetime at 105°C and superior ripple current specification (1.67 A @ 120 Hz). Enhanced electrical performance characteristics and highest inventory availability among substitute options establish this part as the premium upgrade selection for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the 381LX391M400K052 directly replace the SLP391M385E9P3 in existing designs? A: Yes. The 381LX391M400K052 maintains identical 390 µF capacitance, ±20% tolerance, and physical footprint (30.00 mm diameter, 52.00 mm seated height, 10.00 mm lead spacing). The 400 V rating provides additional voltage safety margin over the 385 V specification. RoHS3 compliance and through-hole snap-in package configuration ensure pin-compatible installation.

Q: What is the advantage of selecting a 450 V rated substitute over the original 385 V part? A: A 450 V rating provides 65 V additional voltage headroom, extending component reliability margins in applications experiencing input voltage variations or transient overvoltage conditions. The 450VXG390MEFCSN30X50 and LGX2W391MELB50 additionally provide 5000 Hrs lifetime specification versus the original 3000 Hrs, improving long-term reliability under sustained thermal operation at 105°C.

Q: Are all substitute parts physically compatible with the original snap-in PCB footprint? A: Yes. All substitute parts maintain identical lead spacing of 0.394" (10.00 mm), can diameter of 1.181" (30.00 mm), and maximum seated height of 2.047" (52.00 mm). Physical footprint compatibility is guaranteed across all listed substitutes for direct board-level replacement without PCB redesign.

Q: What ripple current performance differences exist among the substitute parts? A: Ripple current varies by manufacturer design and voltage rating. At 120 Hz low-frequency operation: 381LX391M400K052 delivers 1.55 A; 450VXG390MEFCSN30X50 delivers 1.98 A; LGN2W391MELB50 delivers 1.61 A; LGX2W391MELB50 delivers 1.67 A. Higher ripple current capability supports applications requiring greater energy transfer at low switching frequencies.

Q: Do all substitute parts meet environmental compliance requirements? A: Yes. All substitute parts carry ROHS3 Compliant certification and REACH Unaffected status, matching the environmental compliance profile of the original SLP391M385E9P3. No additional compliance verification is required for regulatory applications.

Q: Which substitute part offers the longest operational lifetime? A: Both 450VXG390MEFCSN30X50 (Rubycon VXG) and LGX2W391MELB50 (Nichicon LGX) specify 5000 Hrs operational lifetime at 105°C, compared to 3000 Hrs for the original part and the 381LX391M400K052 and LGN2W391MELB50 substitutes.