SLPX331M385C9P3 Equivalent & Substitute Parts Reference

Part Overview

The SLPX331M385C9P3 is a 330 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 high-voltage energy storage and filtering. The part is ROHS3 compliant and REACH unaffected.

Substitute parts become necessary when the original SLPX331M385C9P3 experiences extended lead times, inventory constraints, or when design requirements permit operation at higher voltage ratings or temperature specifications. The substitute parts listed maintain the core electrical and mechanical parameters while offering alternative manufacturer options and enhanced performance characteristics.

Substiute Parts

SLPX331M385C9P3

Cornell Dubilier Electronics (CDE)In Stock: 1027SLPX331M385C9P3 Datasheet

Current PartRFQ

450MXG330MEFCSN25X50

RubyconIn Stock: 273875450MXG330MEFCSN25X50 Datasheet

UpgradeRFQ

ESMM451VSN331MQ50S

Chemi-ConIn Stock: 1319ESMM451VSN331MQ50S Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SLPX331M385C9P3 is based on the following allowed parameters:

Capacitance Match: All substitute parts maintain 330 µF capacitance value.

Tolerance Match: All substitute parts maintain ±20% tolerance specification.

Voltage Rating: Substitute parts are rated at 450 V, which exceeds the original 385 V specification. Higher voltage ratings are acceptable in applications where the original voltage margin is sufficient, as the capacitor will operate at a lower stress level relative to its rated voltage.

Package and Mechanical Compatibility: All substitute parts use identical radial, can snap-in packaging with 0.394" (10.00mm) lead spacing, 0.984" (25.00mm) diameter, and 2.047" (52.00mm) maximum seated height. These dimensions ensure direct PCB mounting compatibility without layout modifications.

Mounting Type: All parts are through-hole mounted, maintaining identical assembly requirements.

Polarization: All parts are polar aluminum electrolytic capacitors, requiring correct polarity orientation.

Regulatory Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's compliance status.

Performance Characteristics: Substitute parts maintain comparable ripple current ratings and lifetime specifications at their respective temperature ratings, ensuring functional equivalence in general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution Criteria:

All substitute parts maintain Active product status, ensuring continued manufacturer support and availability. Both substitute options are ROHS3 or RoHS compliant, satisfying regulatory requirements equivalent to or exceeding the original part specification.

450MXG330MEFCSN25X50 (Rubycon MXG Series):

This substitute provides a 450 V rated aluminum electrolytic capacitor with identical mechanical dimensions and lead spacing. The extended operating temperature range (-25°C ~ 105°C) and 3000 Hrs @ 105°C lifetime specification offer enhanced thermal performance compared to the original part. The ripple current rating of 1.82 A @ 120 Hz closely matches the original specification of 1.8 A @ 120 Hz. This part is suitable for applications where higher temperature operation or extended thermal margin is beneficial.

ESMM451VSN331MQ50S (Chemi-Con SMM Series):

This substitute provides a 450 V rated aluminum electrolytic capacitor with equivalent mechanical compatibility. The ESR specification of 1.005 Ohm @ 120Hz is provided, compared to the original 603 mOhm specification. The ripple current rating of 2.12 A @ 120 Hz exceeds the original specification, providing additional current handling capacity. The operating temperature range matches the original part (-25°C ~ 85°C). The diameter specification of 1.000" (25.40mm) represents a minor dimensional variation from the original 0.984" (25.00mm), which remains within typical mechanical tolerance for snap-in can packages.

Selection Basis:

Both substitute parts are electrically and mechanically compatible with the SLPX331M385C9P3. Selection between substitutes depends on application-specific requirements: the Rubycon MXG series for applications requiring extended temperature operation, or the Chemi-Con SMM series for applications requiring higher ripple current capacity.

Frequently Asked Questions (FAQ)

Q: Can the 450 V rated substitute parts replace the 385 V original part?

A: Yes. The substitute parts are rated at 450 V, which exceeds the original 385 V specification. In applications designed for 385 V operation, the higher-rated substitute will operate at a lower stress level relative to its rated voltage, which is electrically acceptable. The capacitor will not be overstressed.

Q: Are the mechanical dimensions identical between all three parts?

A: The lead spacing (0.394" / 10.00mm), height (2.047" / 52.00mm), and package type (radial, can snap-in) are identical across all three parts. The ESMM451VSN331MQ50S has a diameter of 1.000" (25.40mm) compared to 0.984" (25.00mm) for the other two parts. This minor variation remains within typical mechanical tolerance for snap-in can packages and does not affect PCB mounting compatibility.

Q: What is the difference in ESR between the parts?

A: The original SLPX331M385C9P3 specifies 603 mOhm @ 120Hz. The Rubycon 450MXG330MEFCSN25X50 does not provide an ESR specification. The Chemi-Con ESMM451VSN331MQ50S specifies 1.005 Ohm @ 120Hz, which is higher than the original. ESR affects ripple current handling and heat generation; lower ESR is generally preferable for high-frequency ripple current applications.

Q: Which substitute part has better ripple current performance?

A: The Chemi-Con ESMM451VSN331MQ50S provides the highest ripple current rating at 2.12 A @ 120 Hz, compared to 1.8 A for the original part and 1.82 A for the Rubycon substitute. This part is suitable for applications with higher ripple current demands.

Q: Can I use these substitutes in applications requiring operation above 85°C?

A: The Rubycon 450MXG330MEFCSN25X50 is rated for operation up to 105°C with a 3000 Hrs @ 105°C lifetime specification, making it suitable for elevated temperature applications. The Chemi-Con ESMM451VSN331MQ50S is rated to 85°C, matching the original part's temperature specification.

Q: Are all parts RoHS compliant?

A: Yes. The original SLPX331M385C9P3 is ROHS3 compliant. The Rubycon 450MXG330MEFCSN25X50 is ROHS3 compliant. The Chemi-Con ESMM451VSN331MQ50S is RoHS compliant. All parts meet regulatory compliance requirements.

Q: What is the inventory status of these parts?

A: The original SLPX331M385C9P3 has 929 pcs in stock. The Rubycon 450MXG330MEFCSN25X50 has 273,782 pcs in stock. The Chemi-Con ESMM451VSN331MQ50S has 1,269 pcs in stock. Substitute parts offer significantly higher inventory availability.