SLPX331M350E3P3 Equivalent & Substitute Parts

Part Overview

The SLPX331M350E3P3 is a 330 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 reliable energy storage and filtering in power supply circuits. The part is ROHS3 compliant and REACH unaffected, meeting current environmental standards.

Substitute parts become necessary when the original component experiences extended lead times, inventory constraints, or when design requirements permit operation at higher voltage ratings or improved thermal performance. The substitute parts listed maintain electrical and mechanical compatibility while offering enhanced specifications in voltage rating and operating temperature range.

Substiute Parts

SLPX331M350E3P3

Cornell Dubilier Electronics (CDE)In Stock: 977SLPX331M350E3P3 Datasheet

Current PartRFQ

450MXK330MEFCFA30X30

RubyconIn Stock: 273982450MXK330MEFCFA30X30 Datasheet

UpgradeRFQ

B43642C9337M000

EPCOS - TDK ElectronicsIn Stock: 2499B43642C9337M000 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLPX331M350E3P3 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Capacitance: 330 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" (32.00mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: Equal to or greater than 350 V
• Operating Temperature: Equal to or greater than the original range
• ESR (Equivalent Series Resistance): Lower values are acceptable
• Lifetime @ Temp.: Equal to or greater than 3000 Hrs @ 85°C
• RoHS Status: ROHS3 Compliant (maintained)

Both substitute parts meet all mandatory compatibility parameters and provide equal or superior performance in allowable variation parameters.

Parameter Comparison

Engineering Selection Recommendations

SLPX331M350E3P3 (Cornell Dubilier Electronics)

Select this part when the original specification of 350 V rated voltage and -25°C to 85°C operating temperature range are required. This component is Active status with 962 units in stock. Use this part for applications where the thermal environment does not exceed 85°C and voltage stress remains at or below 350 V.

450MXK330MEFCFA30X30 (Rubycon)

This substitute offers a 450 V rated voltage, providing 100 V additional voltage margin over the original part. Operating temperature range extends to 105°C with 3000 Hrs lifetime at this elevated temperature. This part is Active status with 273,882 units in stock. Select this part when higher voltage headroom is beneficial or when operating environments approach 105°C. ROHS3 compliance and REACH unaffected status are maintained.

B43642C9337M000 (EPCOS - TDK Electronics)

This substitute provides 400 V rated voltage with superior ESR performance (270 mOhm @ 100 Hz versus 603 mOhm @ 120 Hz on the original). Operating temperature range extends to 105°C with -40°C lower temperature limit. This part is Active status with 2,413 units in stock. Select this part when lower ESR is advantageous for ripple current handling or when extended temperature range is required. ROHS3 compliance and REACH unaffected status are maintained.

Frequently Asked Questions (FAQ)

Q: Can the 450MXK330MEFCFA30X30 be used as a direct replacement for the SLPX331M350E3P3?

A: Yes. Both parts share identical capacitance (330 µF), tolerance (±20%), package type (Radial, Can - Snap-In), physical dimensions (1.181" Dia × 1.260" height), and lead spacing (0.394"). The 450MXK330MEFCFA30X30 operates at 450 V rated voltage, which exceeds the original 350 V specification, and extends the operating temperature range to 105°C. Direct PCB mounting compatibility is confirmed.

Q: Can the B43642C9337M000 be used as a direct replacement for the SLPX331M350E3P3?

A: Yes. Both parts share identical capacitance (330 µF), tolerance (±20%), package type (Radial, Can - Snap-In), physical dimensions (1.181" Dia × 1.260" height), and lead spacing (0.394"). The B43642C9337M000 operates at 400 V rated voltage and features lower ESR (270 mOhm @ 100 Hz). Direct PCB mounting compatibility is confirmed.

Q: What is the difference in ESR between the original and substitute parts?

A: The SLPX331M350E3P3 has ESR of 603 mOhm @ 120 Hz. The B43642C9337M000 has ESR of 270 mOhm @ 100 Hz, representing lower impedance. The 450MXK330MEFCFA30X30 does not specify ESR. Lower ESR reduces heat generation and improves ripple current handling capability.

Q: Are all three parts ROHS3 compliant?

A: Yes. The SLPX331M350E3P3, 450MXK330MEFCFA30X30, and B43642C9337M000 are all ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: What is the maximum operating temperature for each part?

A: The SLPX331M350E3P3 operates to 85°C. The 450MXK330MEFCFA30X30 and B43642C9337M000 both operate to 105°C. Both substitute parts provide 20°C additional thermal margin.

Q: Do the substitute parts have the same physical footprint?

A: Yes. All three parts have identical lead spacing (0.394" / 10.00mm), diameter (1.181" / 30.00mm), and maximum seated height (1.260" / 32.00mm). PCB layout modifications are not required.

Q: Which substitute part should be selected for high-temperature applications?

A: Both 450MXK330MEFCFA30X30 and B43642C9337M000 support operation to 105°C. The B43642C9337M000 additionally supports -40°C minimum temperature, providing the widest operating range (-40°C to 105°C).

Q: What is the voltage derating consideration when using the 450MXK330MEFCFA30X30?

A: The 450MXK330MEFCFA30X30 is rated for 450 V, which is 100 V above the original 350 V specification. This provides additional voltage margin and reduces voltage stress on the dielectric material, potentially extending component life in high-voltage applications.