SLPX681M350H7P3 Equivalent & Substitute Parts Reference

Part Overview

The SLPX681M350H7P3 is a 680 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can snap-in configuration. This component is classified as Active product status and is designed for general-purpose applications requiring high-capacitance energy storage in through-hole mounting configurations. Substitute parts are identified to address inventory availability, extended voltage ratings, or alternative manufacturer sourcing while maintaining functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

SLPX681M350H7P3

Cornell Dubilier Electronics (CDE)In Stock: 1008SLPX681M350H7P3 Datasheet

Current PartRFQ

400USG680MEFCSN35X40

RubyconIn Stock: 273973400USG680MEFCSN35X40 Datasheet

UpgradeRFQ

LLS2V681MELC

NichiconIn Stock: 274050LLS2V681MELC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLPX681M350H7P3 are classified into two categories based on substitution logic:

Parametric Equivalent (Direct Replacement): The LLS2V681MELC (Nichicon) maintains identical electrical specifications: 680 µF capacitance, 350 V rated voltage, ±20% tolerance, 3000 Hrs @ 85°C lifetime, and identical mechanical dimensions (35.00 mm diameter, 42.00 mm height, 10.00 mm lead spacing). This part qualifies as a direct parametric equivalent suitable for one-to-one replacement in applications where the original SLPX681M350H7P3 is specified.

Upgrade Substitute (Higher Voltage Rating): The 400USG680MEFCSN35X40 (Rubycon) provides upgraded voltage rating of 400 V while maintaining 680 µF capacitance, ±20% tolerance, 3000 Hrs @ 85°C lifetime, and identical mechanical dimensions. This part is suitable for applications where higher voltage margin is required or where the original 350 V rating presents supply chain constraints.

Substitution eligibility is determined by the following parameters:

• Capacitance value (680 µF)
• Tolerance (±20%)
• Lifetime rating (3000 Hrs @ 85°C)
• Mechanical compatibility (lead spacing, diameter, height, snap-in package)
• Mounting type (through hole)
• Polarization (polar)
• RoHS3 compliance

Parameter Comparison

Engineering Selection Recommendations

LLS2V681MELC Selection Criteria: The Nichicon LLS2V681MELC is recommended as the primary substitute when direct parametric equivalence is required. This part maintains identical voltage rating (350 V), capacitance (680 µF), and lifetime specification (3000 Hrs @ 85°C). All mechanical dimensions are identical, ensuring PCB layout compatibility without modification. Both parts are Active status products with ROHS3 compliance and REACH unaffected designation. Inventory availability for LLS2V681MELC is 273,982 pieces.

400USG680MEFCSN35X40 Selection Criteria: The Rubycon 400USG680MEFCSN35X40 is recommended when elevated voltage margin is required or when the 350 V rating presents supply constraints. The 400 V rating provides 14.3% voltage headroom above the original specification while maintaining identical capacitance, tolerance, and mechanical form factor. This part is suitable for applications where voltage transients or design margin improvements are beneficial. Inventory availability for 400USG680MEFCSN35X40 is 273,882 pieces. Note that ripple current at 120 Hz is reduced to 2.96 A compared to 3.15 A in the original specification.

Both substitute parts are Active status products with full RoHS3 compliance and REACH unaffected status, matching the regulatory profile of the original SLPX681M350H7P3.

Frequently Asked Questions (FAQ)

Q: Can the LLS2V681MELC be used as a direct replacement for SLPX681M350H7P3?

A: Yes. The LLS2V681MELC is a parametric equivalent with identical capacitance (680 µF), voltage rating (350 V), tolerance (±20%), lifetime (3000 Hrs @ 85°C), and mechanical dimensions (35.00 mm diameter, 42.00 mm height, 10.00 mm lead spacing). One-to-one substitution is supported without circuit modification.

Q: What is the advantage of using 400USG680MEFCSN35X40 over the original SLPX681M350H7P3?

A: The 400USG680MEFCSN35X40 provides a higher voltage rating (400 V versus 350 V), offering 14.3% additional voltage margin. This is beneficial in applications subject to voltage transients or where design margin improvement is required. Capacitance, tolerance, and mechanical compatibility remain identical.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts share identical mechanical specifications: 35.00 mm diameter, 42.00 mm seated height, 10.00 mm lead spacing, and radial snap-in package configuration. PCB layout and mounting hardware compatibility is maintained across all three parts.

Q: What is the difference in ripple current handling between these parts?

A: The SLPX681M350H7P3 and LLS2V681MELC both support 3.15 A ripple current at 120 Hz. The 400USG680MEFCSN35X40 supports 2.96 A at 120 Hz, representing a 6.0% reduction. For applications with ripple current requirements exceeding 2.96 A at 120 Hz, the SLPX681M350H7P3 or LLS2V681MELC are required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SLPX681M350H7P3, LLS2V681MELC, and 400USG680MEFCSN35X40 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part should be selected for maximum inventory availability?

A: The LLS2V681MELC (Nichicon) offers 273,982 pieces in stock, and the 400USG680MEFCSN35X40 (Rubycon) offers 273,882 pieces in stock. Both provide substantially higher availability than the original SLPX681M350H7P3 (967 pieces in stock).

Q: Can the 400USG680MEFCSN35X40 be used in a circuit designed for 350 V operation?

A: Yes. The 400USG680MEFCSN35X40 is rated for 400 V operation and is therefore suitable for circuits designed for 350 V operation. The higher voltage rating does not create compatibility issues in lower-voltage applications.