SLP820M385A3P3 Equivalent & Substitute Parts

Part Overview

The SLP820M385A3P3 is an 82 µF, 385 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 at elevated temperatures. 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 become necessary when the original component reaches end-of-life inventory status, when design requirements demand enhanced electrical performance characteristics, or when alternative manufacturers offer improved compliance certifications or availability. The substitute parts listed maintain the core functional parameters—capacitance value, tolerance, package geometry, and mounting configuration—while offering variations in voltage rating, ESR characteristics, and temperature operating ranges.

Substiute Parts

SLP820M385A3P3

Cornell Dubilier Electronics (CDE)In Stock: 881SLP820M385A3P3 Datasheet

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381LX820M450H022

Cornell Dubilier Electronics (CDE)In Stock: 902381LX820M450H022 Datasheet

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B43504A9826M000

EPCOS - TDK ElectronicsIn Stock: 1584B43504A9826M000 Datasheet

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B43509A9826M000

EPCOS - TDK ElectronicsIn Stock: 1434B43509A9826M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SLP820M385A3P3 is based on strict equivalence of the following parameters: capacitance (82 µF), tolerance (±20%), package configuration (radial, can snap-in), physical dimensions (0.866" diameter, 1.260" height, 10.00mm lead spacing), mounting type (through-hole), and thermal lifetime rating (3000 hours at 105°C).

Substitute parts are grouped into two categories:

Category 1: Voltage-Upgraded Substitutes These parts maintain identical capacitance, tolerance, package, and dimensions while offering rated voltages equal to or greater than 385 V. This allows direct replacement in applications where the original voltage specification is met or exceeded. Parts in this category include the 381LX820M450H022 (450 V rating) and the B43504A9826M000 and B43509A9826M000 (both 400 V rating).

Category 2: Performance-Enhanced Substitutes These parts provide improved electrical characteristics such as reduced ESR (equivalent series resistance) or enhanced ripple current handling while maintaining all critical mechanical and thermal parameters. The B43509A9826M000 demonstrates superior ESR performance (960 mOhm @ 100Hz) compared to the main part (4.046 Ohm @ 120Hz).

All substitute parts maintain ROHS3 compliance, moisture sensitivity level 1, and through-hole mounting configuration. Operating temperature ranges are either identical (-25°C ~ 105°C) or extended (-40°C ~ 105°C), ensuring compatibility with the original design envelope.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Voltage Margin: The B43509A9826M000 (EPCOS - TDK Electronics, 400 V, Active status) is the primary substitute for the SLP820M385A3P3. This part maintains identical mechanical dimensions, lead spacing, and thermal lifetime specifications while providing a 15 V voltage margin above the original 385 V rating. The B43509A9826M000 demonstrates superior ESR performance at 960 mOhm compared to the main part's 4.046 Ohm, resulting in reduced heat generation and improved ripple current handling (580 mA @ 100 Hz). Active product status ensures continued availability and manufacturer support.

For Maximum Voltage Headroom: The 381LX820M450H022 (Cornell Dubilier Electronics, 450 V, Active status) offers the highest voltage rating among substitutes, providing 65 V margin above the original specification. This part is suitable for applications requiring enhanced overvoltage protection or operating in environments with voltage transients. The 381LX series demonstrates improved ripple current performance (600 mA @ 120 Hz and 800 mA @ 20 kHz) compared to the main part.

Not Recommended for New Designs: The B43504A9826M000 (EPCOS - TDK Electronics, 400 V) carries a "Not For New Designs" product status designation. While electrically compatible and mechanically identical, this part should not be selected for new product development due to its obsolescence trajectory.

All recommended substitutes maintain ROHS3 compliance and are suitable for general-purpose applications across the -25°C to 105°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the SLP820M385A3P3 be replaced with a lower voltage-rated substitute? A: No. Substitute parts must have a rated voltage equal to or greater than 385 V. Using a lower voltage-rated capacitor creates risk of dielectric breakdown and component failure.

Q: Are all substitute parts mechanically identical to the SLP820M385A3P3? A: Yes. All listed substitutes share identical physical dimensions (0.866" diameter, 1.260" height), lead spacing (10.00mm), and snap-in package configuration. They are direct mechanical replacements suitable for through-hole PCB mounting.

Q: What is the significance of ESR differences between the main part and substitutes? A: ESR (equivalent series resistance) affects heat generation and ripple current handling. Lower ESR values indicate improved performance. The B43509A9826M000 (960 mOhm) demonstrates significantly lower ESR than the main part (4.046 Ohm), resulting in reduced thermal stress and extended operational life in high-ripple-current applications.

Q: Why does the B43504A9826M000 carry a "Not For New Designs" status? A: This designation indicates the manufacturer has discontinued active development and support for this part series. While existing inventory remains available and the part is functionally compatible, it should not be selected for new product designs due to uncertain long-term availability.

Q: Are the substitute parts RoHS compliant? A: Yes. All substitute parts listed carry ROHS3 compliance certification, meeting regulatory requirements for hazardous substance restrictions in electronic components.

Q: Can substitute parts with extended temperature ranges (-40°C ~ 105°C) be used in applications designed for -25°C ~ 105°C? A: Yes. Extended temperature range capability is a superset of the original specification. Parts with -40°C ~ 105°C ratings are fully compatible with applications requiring -25°C ~ 105°C operation.

Q: What is the difference between ripple current ratings at 120 Hz versus 20 kHz? A: Ripple current capacity varies with frequency. Low-frequency ripple (120 Hz) is typical in power supply applications, while high-frequency ripple (20 kHz) occurs in switching power supplies. The 381LX820M450H022 provides superior performance at both frequencies compared to the main part.

Q: Is the capacitance tolerance ±20% acceptable for all applications? A: Capacitance tolerance is identical across all parts at ±20%. Applications requiring tighter tolerance specifications cannot use any of these components. Verify tolerance requirements against circuit design specifications before selection.