SLP331M350E5P3 Equivalent & Substitute Parts

Part Overview

The SLP331M350E5P3 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 high-voltage energy storage and filtering. 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 status, experiences supply constraints, or when design requirements call for enhanced electrical performance characteristics such as reduced equivalent series resistance (ESR), extended operational lifetime, or higher voltage ratings while maintaining mechanical and electrical compatibility.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	350	V
Tolerance	±20	%
ESR @ 120Hz	1.005	Ohm
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-25 to 105	°C
Lead Spacing	10.00	mm
Diameter	30.00	mm
Height - Seated (Max)	37.00	mm
Package Type	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the SLP331M350E5P3 is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Physical Dimensions: 30.00 mm diameter, 37.00 mm height maximum (exact match required)
Polarization: Polar (exact match required)

Allowable Upgrade Parameters:

Voltage Rating: Equal to or greater than 350 V
ESR: Equal to or lower than 1.005 Ohm @ 120Hz
Lifetime @ 105°C: Equal to or greater than 3000 hours
Operating Temperature Range: Equal to or wider than -25°C to 105°C
RoHS Compliance: ROHS3 Compliant (maintained)

All three substitute parts meet these criteria and are classified as direct electrical and mechanical equivalents with performance enhancements in voltage rating and/or operational lifetime.

Parameter Comparison

Parameter	SLP331M350E5P3 (Main)	B43644B9337M000	LGN2G331MELB35	LQSW6331MELB35
Manufacturer	Cornell Dubilier Electronics	EPCOS - TDK Electronics	Nichicon	Nichicon
Capacitance	330 µF	330 µF	330 µF	330 µF
Voltage - Rated	350 V	400 V	400 V	420 V
Tolerance	±20%	±20%	±20%	±20%
ESR @ Reference Frequency	1.005 Ohm @ 120Hz	280 mOhm @ 100Hz	Not Specified	Not Specified
Lifetime @ 105°C	3000 Hrs	5000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature Range	-25°C to 105°C	-40°C to 105°C	-25°C to 105°C	-25°C to 105°C
Lead Spacing	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Diameter	30.00 mm	30.00 mm	30.00 mm	30.00 mm
Height - Seated (Max)	37.00 mm	37.00 mm	37.00 mm	37.00 mm
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts are Active product status components that maintain full ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original SLP331M350E5P3.

B43644B9337M000 (EPCOS - TDK Electronics): This substitute provides the lowest ESR at 280 mOhm @ 100Hz, representing a 72% reduction compared to the main part. The voltage rating increases to 400 V, and operational lifetime extends to 5000 hours @ 105°C. The operating temperature range expands to -40°C to 105°C. This part is suitable for applications requiring enhanced thermal performance and reduced ripple current dissipation.

LGN2G331MELB35 (Nichicon): This substitute maintains the same operating temperature range as the main part (-25°C to 105°C) while upgrading the voltage rating to 400 V. The 3000-hour lifetime @ 105°C matches the original specification. ESR data is not specified for this part. This component offers voltage margin improvement with equivalent thermal performance characteristics.

LQSW6331MELB35 (Nichicon): This substitute provides the highest voltage rating at 420 V while maintaining the same operating temperature range (-25°C to 105°C) and 3000-hour lifetime @ 105°C as the main part. ESR data is not specified. This part is suitable for applications requiring maximum voltage headroom within the same thermal performance envelope.

Frequently Asked Questions (FAQ)

Q: Can B43644B9337M000 be used as a direct replacement for SLP331M350E5P3?

A: Yes. B43644B9337M000 meets all mandatory compatibility requirements: 330 µF capacitance, ±20% tolerance, radial can snap-in package, 10.00 mm lead spacing, 30.00 mm diameter, and 37.00 mm maximum height. The 400 V rating and 5000-hour lifetime represent performance upgrades. ROHS3 compliance is maintained.

Q: What is the primary advantage of LGN2G331MELB35 over the original part?

A: LGN2G331MELB35 provides a 50 V voltage rating increase (400 V versus 350 V) while maintaining identical operating temperature range and thermal lifetime specifications. This upgrade provides additional voltage margin for circuit protection without thermal performance trade-offs.

Q: Why does LQSW6331MELB35 have a higher voltage rating than the other substitutes?

A: LQSW6331MELB35 is rated at 420 V, which is the highest among all listed parts. This rating is determined by the internal design and construction of the capacitor element. The 420 V rating provides maximum voltage headroom for applications requiring the highest safety margin within the same physical package and thermal specifications.

Q: Are all substitute parts mechanically interchangeable with SLP331M350E5P3?

A: Yes. All three substitute parts share identical mechanical specifications: 30.00 mm diameter, 37.00 mm maximum seated height, 10.00 mm lead spacing, radial can snap-in package, and through-hole mounting type. Direct PCB mounting without modification is supported.

Q: Which substitute part has the lowest ESR?

A: B43644B9337M000 specifies 280 mOhm @ 100Hz ESR. The other two substitutes (LGN2G331MELB35 and LQSW6331MELB35) do not provide ESR specifications in the available data. Lower ESR reduces ripple current dissipation and heat generation in high-frequency applications.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. All three substitute parts are ROHS3 Compliant and REACH Unaffected, matching the regulatory status of the original SLP331M350E5P3. No compliance trade-offs occur with any substitution.

Q: What is the temperature operating range difference between substitutes?

A: B43644B9337M000 operates from -40°C to 105°C, providing a 15°C lower temperature limit compared to the main part and the other two substitutes, which operate from -25°C to 105°C. This extended low-temperature range may be beneficial for applications in cold environments.

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