SLP391M350H5P3 Equivalent & Substitute Parts

Part Overview

The SLP391M350H5P3 is a 390 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is classified as Active product status and is designed for general-purpose applications requiring stable capacitance and extended operational life. The part operates across a temperature range of -25°C to 105°C with a rated lifetime of 3000 hours at 105°C. Substitute parts are identified when equivalent capacitance and tolerance values are maintained while voltage ratings, ESR characteristics, or thermal performance may be upgraded to meet enhanced system requirements or address component availability.

Substiute Parts

SLP391M350H5P3

Cornell Dubilier Electronics (CDE)In Stock: 1062SLP391M350H5P3 Datasheet

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381LR391M400A032

Cornell Dubilier Electronics (CDE)In Stock: 1724381LR391M400A032 Datasheet

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B43644B5397M000

EPCOS - TDK ElectronicsIn Stock: 2078B43644B5397M000 Datasheet

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LQSW6391MELC35

NichiconIn Stock: 273890LQSW6391MELC35 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLP391M350H5P3 are qualified based on the following criteria:

Mandatory Matching Parameters:

• Capacitance: 390 µF (exact match)
• Tolerance: ±20% (exact match)
• Package Type: Radial, Can - Snap-In (exact match)
• Lead Spacing: 10.00 mm (exact match)
• Mounting Type: Through Hole (exact match)
• Polarization: Polar (exact match)

Allowable Upgrade Parameters:

• Voltage Rating: Equal to or greater than 350 V
• ESR: Equal to or lower than 851 mOhm @ 120Hz
• Lifetime @ 105°C: Equal to or greater than 3000 hours
• Operating Temperature Range: Equal to or wider than -25°C to 105°C

All substitute parts maintain identical physical dimensions (1.378" diameter, 1.457" maximum seated height) and are RoHS3 compliant with REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

381LR391M400A032 (Cornell Dubilier Electronics)

This substitute provides a 50 V voltage rating increase (400 V vs. 350 V) while maintaining identical physical dimensions and lead spacing. The ESR is reduced to 340 mOhm @ 120Hz, representing a 60% improvement over the main part. Ripple current capacity increases to 1.85 A @ 120Hz and 2.64 A @ 20kHz. Lifetime remains at 3000 hours @ 105°C. This part is suitable for applications requiring enhanced voltage margin and reduced thermal dissipation. Product status is Active with full RoHS3 compliance.

B43644B5397M000 (EPCOS - TDK Electronics)

This substitute offers the highest voltage rating at 450 V and the lowest ESR at 270 mOhm @ 100Hz, providing superior performance margins. Lifetime is extended to 5000 hours @ 105°C, representing a 67% increase in operational life. Operating temperature range expands to -40°C to 105°C, enabling operation in colder environments. Physical footprint remains identical. Product status is Active with RoHS3 compliance. This part is recommended for demanding applications requiring extended thermal life and lower impedance characteristics.

LQSW6391MELC35 (Nichicon)

This substitute maintains the 420 V voltage rating with identical physical dimensions and lead spacing. Ripple current capacity is 1.61 A @ 120Hz and 2.3023 A @ 50kHz. Lifetime is 3000 hours @ 105°C. ESR is not specified in available data. Operating temperature range is -25°C to 105°C. Product status is Active with RoHS3 compliance. This part offers high inventory availability (273,782 pieces in stock) and is suitable for general-purpose applications where voltage margin and ripple current handling are secondary considerations.

Frequently Asked Questions (FAQ)

Q: Can the SLP391M350H5P3 be directly replaced with any of these substitute parts?

A: Yes. All substitute parts maintain the same capacitance (390 µF), tolerance (±20%), physical dimensions, lead spacing (10.00 mm), and snap-in package configuration. They are mechanically and electrically interchangeable in through-hole mounting applications.

Q: What is the primary advantage of using 381LR391M400A032 over the original part?

A: The 381LR391M400A032 provides a 50 V higher voltage rating (400 V vs. 350 V) and significantly lower ESR (340 mOhm vs. 851 mOhm @ 120Hz). This results in reduced heat generation and improved ripple current handling capacity (1.85 A vs. 1.47 A @ 120Hz).

Q: Which substitute part offers the longest operational lifetime?

A: The B43644B5397M000 provides 5000 hours @ 105°C, compared to 3000 hours for the main part and other substitutes. This represents a 67% increase in rated lifetime.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (381LR391M400A032, B43644B5397M000, and LQSW6391MELC35) are RoHS3 compliant and REACH unaffected, matching the compliance status of the main part.

Q: What is the temperature operating range difference between substitutes?

A: The main part and most substitutes operate from -25°C to 105°C. The B43644B5397M000 extends the lower temperature limit to -40°C, enabling operation in colder environments.

Q: Can ESR values be compared directly across all parts?

A: ESR values are provided at different reference frequencies: 120Hz for SLP391M350H5P3 and 381LR391M400A032, 100Hz for B43644B5397M000, and not specified for LQSW6391MELC35. Direct numerical comparison should account for frequency-dependent impedance characteristics.

Q: Which substitute has the highest ripple current capacity?

A: The 381LR391M400A032 provides the highest specified ripple current at 1.85 A @ 120Hz and 2.64 A @ 20kHz, followed by LQSW6391MELC35 at 1.61 A @ 120Hz and 2.3023 A @ 50kHz.

Q: Is inventory availability a consideration for part selection?

A: Inventory levels vary significantly: LQSW6391MELC35 has 273,782 pieces in stock, B43644B5397M000 has 2,036 pieces, 381LR391M400A032 has 1,640 pieces, and SLP391M350H5P3 has 977 pieces. Availability may influence procurement decisions for high-volume applications.