SLP271M350E3P3 Equivalent & Substitute Parts Reference

Part Overview

The SLP271M350E3P3 is a 270 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, can snap-in package configuration. This component is classified as Active product status and is designed for general-purpose applications requiring through-hole mounting with snap-in terminals.

Substitute parts become necessary when the original SLP271M350E3P3 experiences supply constraints, extended lead times, or when design requirements permit operation at higher voltage ratings or extended thermal lifetimes. All substitute parts listed maintain identical capacitance, tolerance, physical dimensions, lead spacing, and mounting type while offering alternative voltage ratings and thermal performance characteristics.

Substiute Parts

SLP271M350E3P3

Cornell Dubilier Electronics (CDE)In Stock: 731SLP271M350E3P3 Datasheet

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450MXK270MEFCSN30X30

RubyconIn Stock: 897450MXK270MEFCSN30X30 Datasheet

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450VXH270MEFCSN30X30

RubyconIn Stock: 1728450VXH270MEFCSN30X30 Datasheet

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B43644C9277M000

EPCOS - TDK ElectronicsIn Stock: 1029B43644C9277M000 Datasheet

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ELHS451VSN271MR30S

Chemi-ConIn Stock: 1134ELHS451VSN271MR30S Datasheet

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LGN2G271MELB30

NichiconIn Stock: 1682LGN2G271MELB30 Datasheet

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LGNW6271MELB30

NichiconIn Stock: 1028LGNW6271MELB30 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLP271M350E3P3 is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Capacitance: 270 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Size / Dimension: 1.181" Dia (30.00mm) (exact match required)
• Height - Seated (Max): 1.260" or 1.280" (32.00mm or 32.50mm) (within tolerance)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: 350 V or higher (uprating permitted)
• Lifetime @ Temp.: 3000 Hrs or higher at 105°C (extended life permitted)
• Operating Temperature: -25°C ~ 105°C or wider range (extended range permitted)
• ESR (Equivalent Series Resistance): Lower values preferred but not mandatory
• Ripple Current: Higher values preferred but not mandatory

All five substitute parts meet the mandatory matching criteria and offer either voltage uprating, extended thermal lifetime, or both.

Parameter Comparison

Engineering Selection Recommendations

Voltage Uprating Considerations:

All substitute parts operate at voltage ratings equal to or higher than the original SLP271M350E3P3 (350 V). The 450 V rated substitutes (450MXK270MEFCSN30X30, 450VXH270MEFCSN30X30, ELHS451VSN271MR30S) provide 100 V uprating margin. The 400 V and 420 V rated substitutes (B43644C9277M000, LGN2G271MELB30, LGNW6271MELB30) provide 50 V and 70 V uprating margins respectively. Voltage uprating is permissible in applications where the circuit design voltage does not exceed the substitute part rating.

Thermal Lifetime Extension:

The original SLP271M350E3P3 specifies 3000 hours at 105°C. Three substitute parts offer extended thermal lifetime of 5000 hours at 105°C: 450VXH270MEFCSN30X30 (Rubycon VXH series), B43644C9277M000 (EPCOS B43644 series), and ELHS451VSN271MR30S (Chemi-Con LHS series). Extended thermal lifetime improves long-term reliability in continuous operation environments.

Temperature Range Extension:

The original SLP271M350E3P3 operates from -25°C to 105°C. Two substitute parts extend the lower temperature limit to -40°C: B43644C9277M000 (EPCOS) and ELHS451VSN271MR30S (Chemi-Con). Extended low-temperature operation capability is beneficial for applications in cold environments or equipment requiring broader environmental specifications.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance or equivalent RoHS compliance and REACH Unaffected status, matching the regulatory posture of the original SLP271M350E3P3. All parts are classified as Active product status, ensuring continued availability and manufacturing support.

Physical Compatibility:

All substitute parts maintain identical lead spacing (0.394" / 10.00mm), diameter (1.181" / 30.00mm), and mounting type (through-hole snap-in). Height variation is minimal: ELHS451VSN271MR30S measures 1.280" (32.50mm) versus 1.260" (32.00mm) for all other parts. This 0.020" (0.50mm) difference is within standard PCB layout tolerances for snap-in capacitor mounting.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated substitute in a circuit designed for 350 V operation?

A: Yes. Voltage uprating is permissible. A 450 V capacitor operates safely at 350 V circuit voltage. The capacitor will not be stressed beyond its design limits. Uprating provides additional safety margin and does not degrade performance in the application.

Q: What is the difference between the two Rubycon 450 V substitutes?

A: Both 450MXK270MEFCSN30X30 (MXK series) and 450VXH270MEFCSN30X30 (VXH series) are rated 450 V with 270 µF capacitance. The primary difference is thermal lifetime: MXK series specifies 3000 hours at 105°C, while VXH series specifies 5000 hours at 105°C. The VXH series provides extended thermal life for applications requiring longer operational duration at elevated temperature.

Q: Are all substitute parts physically interchangeable with the original SLP271M350E3P3?

A: Yes, with one minor consideration. All substitute parts maintain identical lead spacing (10.00mm), diameter (30.00mm), and mounting type (through-hole snap-in). The ELHS451VSN271MR30S (Chemi-Con) has a maximum seated height of 1.280" (32.50mm) compared to 1.260" (32.00mm) for other parts. This 0.50mm difference is within standard PCB layout tolerances and does not prevent physical installation.

Q: Which substitute offers the best thermal performance?

A: Three substitutes offer extended thermal lifetime of 5000 hours at 105°C: 450VXH270MEFCSN30X30 (Rubycon VXH), B43644C9277M000 (EPCOS B43644), and ELHS451VSN271MR30S (Chemi-Con LHS). The original SLP271M350E3P3 specifies 3000 hours at 105°C. Selection among these three depends on voltage rating requirements and operating temperature range needs.

Q: Do all substitutes maintain RoHS compliance?

A: Yes. All substitute parts are either ROHS3 Compliant or RoHS Compliant, matching the regulatory compliance of the original SLP271M350E3P3. All parts maintain REACH Unaffected status.

Q: Can I substitute based on ESR (Equivalent Series Resistance) specifications?

A: ESR data is provided only for the original SLP271M350E3P3 (1.229 Ohm @ 120Hz) and B43644C9277M000 (410 mOhm @ 100Hz). ESR specifications are not provided for other substitutes. Substitution decisions should not be based on ESR alone when data is unavailable. If ESR performance is critical to the application, B43644C9277M000 is the only substitute with specified ESR data for comparison.

Q: What is the inventory status of these parts?

A: Current inventory levels are: SLP271M350E3P3 (646 pcs), 450MXK270MEFCSN30X30 (792 pcs), 450VXH270MEFCSN30X30 (1659 pcs), B43644C9277M000 (1009 pcs), ELHS451VSN271MR30S (1072 pcs), LGN2G271MELB30 (1627 pcs), LGNW6271MELB30 (972 pcs). All parts are listed as new original stock.

Q: Are there any differences in ripple current ratings between the original and substitutes?

A: Yes. Ripple current ratings vary across all parts. The original SLP271M350E3P3 specifies 1.17 A @ 120 Hz. Substitutes range from 1.12 A to 1.49 A @ 120 Hz. Higher ripple current capability indicates improved performance in high-frequency switching applications. Specific ripple current requirements should be evaluated against application demands.