Equivalent & Substitute Parts for 380LQ331M350H452

Part Overview

The Cornell Dubilier Electronics 380LQ331M350H452 is a 330 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement. The part operates across a temperature range of -25°C to 85°C with a rated lifetime of 2000 hours at 85°C, making it suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	350 V
Tolerance	±20%
ESR @ 120 Hz	603 mOhm
Lifetime @ 85°C	2000 Hrs
Operating Temperature Range	-25°C ~ 85°C
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Mounting Type	Through Hole
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 380LQ331M350H452 is determined by the following critical parameters:

Primary Matching Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 350 V minimum (equal or higher acceptable)
Tolerance: ±20% (standard for this category)
Package Type: Radial, Can - Snap-In (mechanical compatibility)
Lead Spacing: 0.394" (10.00 mm) (PCB footprint requirement)
Mounting Type: Through Hole (assembly compatibility)
Polarization: Polar (electrical requirement)

Secondary Compatibility Parameters:

ESR @ 120 Hz: 603 mOhm (performance baseline)
Operating Temperature Range: -25°C ~ 85°C minimum
Lifetime @ Temperature: 2000 Hrs @ 85°C minimum
RoHS Compliance: ROHS3 or equivalent

Substitute parts are grouped into two categories: Direct Equivalents (same voltage rating, same series) and Upgraded Alternatives (higher voltage rating, improved lifetime, or enhanced thermal performance).

Parameter Comparison

Part Number	Manufacturer	Series	Status	Capacitance	Voltage	ESR @ 120 Hz	Lifetime @ Temp	Operating Temp	Package	Lead Spacing	Size Dia	Height Max
380LQ331M350H452	Cornell Dubilier	380LQ	Obsolete	330 µF	350 V	603 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.850" (47.00 mm)
SLPX331M350A4P3	Cornell Dubilier	SLPX	Active	330 µF	350 V	603 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.850" (47.00 mm)
380LQ331M350J032	Cornell Dubilier	380LQ	Active	330 µF	350 V	603 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.984" (25.00 mm)	1.457" (37.00 mm)
380LQ331M400H052	Cornell Dubilier	380LQ	Active	330 µF	400 V	603 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	2.047" (52.00 mm)
380LX331M350A022	Cornell Dubilier	380LX	Active	330 µF	350 V	500 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	1.378" (35.00 mm)	1.260" (32.00 mm)
380LX331M350J052	Cornell Dubilier	380LX	Active	330 µF	350 V	500 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.984" (25.00 mm)	2.047" (52.00 mm)
400MXK330MEFC22X45	Rubycon	MXK	Active	330 µF	400 V	Not Specified	3000 Hrs @ 105°C	-25°C ~ 105°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.850" (47.00 mm)
400USH330MEFC22X45	Rubycon	USH	Active	330 µF	400 V	Not Specified	3000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can	0.394" (10.00 mm)	0.866" (22.00 mm)	1.850" (47.00 mm)
EKMW401VSN331MP45S	Chemi-Con	KMW	Active	330 µF	400 V	Not Specified	2000 Hrs @ 105°C	-25°C ~ 105°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.870" (47.50 mm)
ESMR401VSN331MP45S	Chemi-Con	SMR	Active	330 µF	400 V	Not Specified	2000 Hrs @ 85°C	-25°C ~ 85°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.870" (47.50 mm)
LGL2G331MELZ45	Nichicon	LGL	Active	330 µF	400 V	Not Specified	2000 Hrs @ 105°C	-25°C ~ 105°C	Radial, Can - Snap-In	0.394" (10.00 mm)	0.866" (22.00 mm)	1.850" (47.00 mm)

Engineering Selection Recommendations

Direct Equivalent (Same Voltage, Active Status):

SLPX331M350A4P3 (Cornell Dubilier) is the primary direct equivalent. This part maintains identical electrical specifications (330 µF, 350 V, 603 mOhm ESR) and mechanical dimensions as the obsolete 380LQ331M350H452. The SLPX series offers an extended lifetime of 3000 hours at 85°C compared to the original 2000 hours, providing improved reliability without design modification. Both parts are ROHS3 compliant and feature identical lead spacing and package configuration.

Alternative Within Same Voltage Class (350 V):

380LQ331M350J032 (Cornell Dubilier) maintains the same 380LQ series designation and electrical performance but features different physical dimensions (0.984" diameter, 1.457" height versus 0.866" diameter, 1.850" height). This part is suitable only if PCB layout accommodates the larger form factor.

380LX331M350A022 and 380LX331M350J052 (Cornell Dubilier) offer reduced ESR (500 mOhm versus 603 mOhm) and extended lifetime (3000 hours at 85°C). These parts feature different physical dimensions and are suitable for applications requiring lower impedance or extended operational life within the 350 V rating.

Upgraded Alternatives (Higher Voltage Rating, 400 V):

Parts rated at 400 V provide voltage margin above the original 350 V specification. These include:

380LQ331M400H052 (Cornell Dubilier): Same series, extended height (2.047"), maintains 603 mOhm ESR
400MXK330MEFC22X45 (Rubycon): Extended operating temperature to 105°C, 3000-hour lifetime at 105°C
400USH330MEFC22X45 (Rubycon): Enhanced ripple current capability, 3000-hour lifetime at 85°C
EKMW401VSN331MP45S (Chemi-Con): Extended operating temperature to 105°C, 2000-hour lifetime at 105°C
ESMR401VSN331MP45S (Chemi-Con): Enhanced ripple current capability, 2000-hour lifetime at 85°C
LGL2G331MELZ45 (Nichicon): Extended operating temperature to 105°C, 2000-hour lifetime at 105°C

All substitute parts maintain through-hole mounting, radial configuration, 0.394" lead spacing, and ROHS3 compliance. Selection among upgraded alternatives depends on available PCB space, thermal environment, and ripple current requirements.

Frequently Asked Questions (FAQ)

Q: Can SLPX331M350A4P3 be used as a direct replacement for 380LQ331M350H452?

A: Yes. SLPX331M350A4P3 is electrically and mechanically compatible. Both parts share identical capacitance (330 µF), voltage rating (350 V), ESR (603 mOhm @ 120 Hz), operating temperature range (-25°C ~ 85°C), lead spacing (0.394"), and package configuration (radial, can snap-in). SLPX331M350A4P3 offers improved lifetime (3000 hours versus 2000 hours at 85°C) with no design modification required.

Q: What is the difference between 350 V and 400 V rated parts?

A: The voltage rating indicates the maximum continuous voltage the capacitor can withstand. A 400 V part can operate safely at 350 V with additional voltage margin, providing enhanced reliability in applications subject to voltage transients or overvoltage conditions. However, 400 V parts typically occupy larger physical space due to increased dielectric thickness.

Q: Can I use 380LX331M350A022 instead of the original part?

A: 380LX331M350A022 is electrically compatible (330 µF, 350 V, -25°C ~ 85°C) but features different physical dimensions (1.378" diameter, 1.260" height versus 0.866" diameter, 1.850" height). PCB layout must accommodate the larger diameter. This part offers lower ESR (500 mOhm versus 603 mOhm) and extended lifetime (3000 hours versus 2000 hours at 85°C).

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant or RoHS compliant, meeting environmental and hazardous substance restrictions. Compliance status is maintained across all manufacturers (Cornell Dubilier, Rubycon, Chemi-Con, Nichicon).

Q: What does "snap-in" package mean?

A: Snap-in refers to the mechanical mounting method where the capacitor's leads insert into PCB holes and are secured by a snap-fit mechanism, as opposed to solder-only attachment. This configuration is standard for radial aluminum electrolytic capacitors in through-hole applications.

Q: Can I substitute a 400 V part in a circuit designed for 350 V?

A: Yes. A 400 V rated capacitor can be used in a 350 V circuit. The higher voltage rating provides additional safety margin. However, verify that the physical dimensions fit the available PCB space, as 400 V parts often require larger form factors.

Q: What is ESR and why does it matter?

A: Equivalent Series Resistance (ESR) represents the internal resistance of the capacitor at a specified frequency (120 Hz in this case). Lower ESR indicates better performance in high-ripple-current applications and reduced heat generation. The original part specifies 603 mOhm ESR; alternatives with lower ESR (such as 500 mOhm in the 380LX series) provide improved performance in demanding applications.

Q: Which substitute offers the best thermal performance?

A: Parts rated for 105°C operation (400MXK330MEFC22X45, EKMW401VSN331MP45S, LGL2G331MELZ45) provide extended thermal capability compared to the original 85°C rating. These parts maintain specified performance across a wider temperature range and are suitable for applications in elevated-temperature environments.

Q: Are there any mechanical compatibility issues between substitute parts?

A: Lead spacing (0.394" / 10.00 mm) is standardized across all listed parts, ensuring PCB footprint compatibility. However, physical dimensions (diameter and height) vary. Verify that the selected substitute fits within available PCB space. Parts with identical dimensions to the original (0.866" diameter, 1.850" height) include SLPX331M350A4P3 and 400MXK330MEFC22X45.

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