SLP391M350E7P3 Equivalent & Substitute Parts Reference

Part Overview

The SLP391M350E7P3 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 high-capacitance energy storage in power supply and filtering circuits.

Substitute parts are identified when equivalent capacitance and tolerance values are maintained while voltage ratings, ESR characteristics, or thermal lifetime specifications may differ within acceptable engineering parameters. The three substitute parts listed maintain the core 390 µF ±20% specification while offering alternative voltage ratings (400 V to 450 V) and improved thermal performance characteristics.

Substiute Parts

SLP391M350E7P3

Cornell Dubilier Electronics (CDE)In Stock: 1046SLP391M350E7P3 Datasheet

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B43544B9397M000

EPCOS - TDK ElectronicsIn Stock: 1650B43544B9397M000 Datasheet

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ELHS451VSN391MR40S

Chemi-ConIn Stock: 1391ELHS451VSN391MR40S Datasheet

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LGX2G391MELB40

NichiconIn Stock: 274113LGX2G391MELB40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Core Electrical Compatibility:

• Capacitance value: 390 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage rating: Equal to or greater than 350 V (higher voltage ratings provide backward compatibility)

Mechanical Compatibility:

• Package type: Radial, Can - Snap-In (exact match required)
• Lead spacing: 10.00 mm (exact match required)
• Diameter: 30.00 mm (exact match required)
• Height: 42.00 mm to 42.50 mm (within acceptable tolerance)
• Mounting type: Through Hole (exact match required)

Compliance Requirements:

• RoHS3 Compliant or RoHS Compliant status
• REACH Unaffected classification

All three substitute parts meet these criteria. Voltage ratings range from 400 V to 450 V, providing overvoltage margin relative to the 350 V specification. Thermal lifetime ratings extend from 3000 Hrs to 5000 Hrs at 105°C, representing equal or improved performance.

Parameter Comparison

Engineering Selection Recommendations

B43544B9397M000 (EPCOS - TDK Electronics): This substitute provides a 400 V rated voltage with significantly improved ESR performance (150 mOhm @ 100Hz versus 851 mOhm @ 120Hz). Thermal lifetime matches the main part at 3000 Hrs @ 105°C. ROHS3 Compliant status and REACH Unaffected classification ensure regulatory alignment. Extended operating temperature range (-40°C to 105°C) provides additional environmental margin. Selection is appropriate for applications where lower ESR and higher voltage margin are beneficial.

ELHS451VSN391MR40S (Chemi-Con): This substitute offers the highest voltage rating at 450 V with extended thermal lifetime of 5000 Hrs @ 105°C. Height dimension is 42.50 mm, within acceptable tolerance of the main part's 42.00 mm specification. RoHS Compliant status and REACH Unaffected classification satisfy regulatory requirements. Extended operating temperature range (-40°C to 105°C) exceeds main part specifications. Selection is appropriate for applications requiring maximum thermal longevity and voltage margin.

LGX2G391MELB40 (Nichicon): This substitute provides 400 V rated voltage with extended thermal lifetime of 5000 Hrs @ 105°C. ROHS3 Compliant status and REACH Unaffected classification ensure regulatory alignment. Mechanical dimensions match the main part exactly. Operating temperature range (-25°C to 105°C) matches the main part specification. Selection is appropriate for applications requiring extended thermal performance with identical mechanical fit.

All three substitutes maintain Active product status and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can B43544B9397M000 be used as a direct replacement for SLP391M350E7P3?

A: Yes. Both parts share identical capacitance (390 µF), tolerance (±20%), lead spacing (10.00 mm), diameter (30.00 mm), height (42.00 mm), and package type (Radial, Can - Snap-In). The 400 V rating of B43544B9397M000 exceeds the 350 V requirement, providing overvoltage margin. ESR is significantly lower (150 mOhm versus 851 mOhm), which may improve circuit performance in high-ripple-current applications.

Q: What is the difference between the three substitute parts?

A: The primary differences are voltage rating and thermal lifetime. B43544B9397M000 offers 400 V with 3000 Hrs lifetime and superior ESR. ELHS451VSN391MR40S provides 450 V with 5000 Hrs lifetime and 0.50 mm additional height. LGX2G391MELB40 provides 400 V with 5000 Hrs lifetime and exact mechanical match to the main part.

Q: Are all substitute parts RoHS compliant?

A: Yes. B43544B9397M000 and LGX2G391MELB40 are ROHS3 Compliant. ELHS451VSN391MR40S is RoHS Compliant. All three are REACH Unaffected.

Q: Will ELHS451VSN391MR40S fit in the same PCB footprint as SLP391M350E7P3?

A: The height dimension of ELHS451VSN391MR40S is 42.50 mm (seated max) compared to 42.00 mm for the main part. This 0.50 mm difference is within typical PCB design tolerance for through-hole snap-in capacitors. Lead spacing (10.00 mm), diameter (30.00 mm), and mounting type (Through Hole) are identical. Verify PCB clearance specifications for your application.

Q: Which substitute should I select for maximum thermal performance?

A: Both ELHS451VSN391MR40S and LGX2G391MELB40 provide 5000 Hrs lifetime at 105°C, double the 3000 Hrs specification of the main part. LGX2G391MELB40 maintains exact mechanical dimensions and operating temperature range (-25°C to 105°C) matching the main part. ELHS451VSN391MR40S provides extended operating temperature range (-40°C to 105°C) and highest voltage rating (450 V).

Q: Can I use a 400 V or 450 V rated capacitor in a 350 V circuit?

A: Yes. Higher voltage-rated capacitors are backward compatible in lower-voltage applications. The 400 V and 450 V rated substitutes provide overvoltage margin and are suitable for 350 V circuits.