Equivalent & Substitute Parts for 380LX331M350A022

Part Overview

The Cornell Dubilier Electronics 380LX331M350A022 is a 330 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is classified as Active product status and is designed for general-purpose applications requiring through-hole mounting with snap-in terminals.

Substitute parts become necessary when the original component reaches end-of-life inventory constraints, when design requirements demand enhanced performance characteristics such as higher voltage ratings or extended operational lifetime, or when alternative manufacturers' components offer superior electrical specifications within the same mechanical envelope.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	350	V
Tolerance	±20%	-
ESR @ 120Hz	500	mOhm
Lifetime @ 85°C	3000	Hrs
Operating Temperature Range	-25 to 85	°C
Ripple Current @ 120Hz	1.9	A
Ripple Current @ 20kHz	2.6	A
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height - Seated (Max)	32.00	mm
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution logic for the 380LX331M350A022 is determined by the following critical parameters:

Primary Compatibility Criteria:

Capacitance value: 330 µF (fixed requirement)
Tolerance: ±20% (fixed requirement)
Mounting type: Through Hole (fixed requirement)
Package configuration: Radial, Can - Snap-In (fixed requirement)
Lead spacing: 10.00 mm (fixed requirement)
Physical dimensions: 35.00 mm diameter, 32.00 mm height maximum (fixed requirement)

Secondary Performance Criteria (Allowable Variations):

Voltage rating: Equal to or greater than 350 V
ESR: Equal to or lower than 500 mOhm @ 120Hz
Lifetime: Equal to or greater than 3000 Hrs @ 85°C
Operating temperature range: Must encompass -25°C to 85°C minimum
Ripple current capability: Equal to or greater than specified values

Substitute parts are classified into two categories: Upgrade substitutes (enhanced voltage rating or extended lifetime) and Similar substitutes (equivalent electrical performance with minor dimensional or specification variations).

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	ESR @ 120Hz (mOhm)	Lifetime @ Temp	Temp Range (°C)	Diameter (mm)	Height (mm)	Product Status
380LX331M350A022	Cornell Dubilier	330	350	500	3000 Hrs @ 85°C	-25 to 85	35.00	32.00	Active
381LR331M400A022	Cornell Dubilier	330	400	402	3000 Hrs @ 105°C	-25 to 105	35.00	32.00	Active
380LQ331M350J032	Cornell Dubilier	330	350	603	2000 Hrs @ 85°C	-25 to 85	25.00	37.00	Active
B43254C9337M000	EPCOS - TDK Electronics	330	400	-	3000 Hrs @ 105°C	-25 to 105	35.00	32.00	Not For New Designs
B43501C9337M000	EPCOS - TDK Electronics	330	400	200	10000 Hrs @ 85°C	-40 to 85	35.00	32.00	Not For New Designs
B43634C5337M000	EPCOS - TDK Electronics	330	450	340	8000 Hrs @ 85°C	-25 to 85	35.00	32.00	Active
LQSW6331MELC30	Nichicon	330	420	-	3000 Hrs @ 105°C	-25 to 105	35.00	32.00	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): The 380LQ331M350J032 maintains the same voltage rating and capacitance as the original 380LX331M350A022. However, this part exhibits higher ESR (603 mOhm versus 500 mOhm) and reduced lifetime (2000 Hrs versus 3000 Hrs at 85°C). Physical dimensions differ (25.00 mm diameter, 37.00 mm height), requiring PCB layout verification before implementation.

For Upgraded Performance (Higher Voltage Rating): The 381LR331M400A022 (Cornell Dubilier, Active status) provides identical physical dimensions and improved ESR (402 mOhm). Extended operating temperature range (-25°C to 105°C) and enhanced lifetime (3000 Hrs @ 105°C) support applications requiring thermal margin. This upgrade maintains mechanical compatibility with existing through-hole snap-in footprints.

The LQSW6331MELC30 (Nichicon, Active status) offers 420 V rating with identical physical envelope. Extended temperature capability (-25°C to 105°C) and 3000 Hrs @ 105°C lifetime provide thermal performance enhancement. This component is suitable for designs requiring higher voltage margin without mechanical redesign.

For Extended Lifetime Applications: The B43501C9337M000 (EPCOS - TDK Electronics, Not For New Designs) delivers superior ESR performance (200 mOhm @ 100Hz) and extended lifetime (10000 Hrs @ 85°C). Expanded operating temperature range (-40°C to 85°C) accommodates demanding thermal environments. Product status designation restricts use to legacy design maintenance only.

The B43634C5337M000 (EPCOS - TDK Electronics, Active status) provides 450 V rating with 8000 Hrs @ 85°C lifetime and improved ESR (340 mOhm @ 100Hz). Physical dimensions remain compatible with original footprint specifications.

Compliance Considerations: All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original component. MSL rating of 1 (Unlimited) applies uniformly across all candidates, eliminating moisture sensitivity constraints during handling and storage.

Frequently Asked Questions (FAQ)

Q: Can the 380LQ331M350J032 be used as a direct mechanical replacement?

A: The 380LQ331M350J032 maintains identical lead spacing (10.00 mm) and voltage rating (350 V), but physical dimensions differ significantly. Diameter reduces from 35.00 mm to 25.00 mm, while height increases from 32.00 mm to 37.00 mm. PCB layout verification is required to confirm clearance compatibility before substitution.

Q: What is the primary advantage of upgrading to the 381LR331M400A022?

A: The 381LR331M400A022 maintains identical physical dimensions and lead spacing while providing 50 V higher voltage rating (400 V versus 350 V). ESR improves to 402 mOhm, and operating temperature range extends to 105°C. These enhancements provide design margin for applications subject to voltage transients or elevated ambient temperatures.

Q: Why is the B43501C9337M000 marked "Not For New Designs"?

A: Product status "Not For New Designs" indicates the component is in mature or declining production phase. While technically suitable for legacy system maintenance, new circuit designs should prioritize Active status components such as 381LR331M400A022, B43634C5337M000, or LQSW6331MELC30 to ensure long-term supply availability and manufacturing consistency.

Q: Are all substitute parts compatible with existing through-hole snap-in PCB footprints?

A: All substitute parts except 380LQ331M350J032 maintain the 35.00 mm diameter and 32.00 mm maximum height specifications, ensuring mechanical compatibility with standard snap-in footprints. The 380LQ331M350J032 requires footprint redesign due to reduced diameter and increased height.

Q: What ESR performance difference exists between the original and substitute parts?

A: The original 380LX331M350A022 specifies 500 mOhm @ 120Hz. Substitute options range from 200 mOhm (B43501C9337M000) to 603 mOhm (380LQ331M350J032). Lower ESR values reduce heat dissipation and improve ripple current handling capability. Selection depends on application ripple current requirements and thermal constraints.

Q: Do all substitute parts support the same operating temperature range?

A: Operating temperature ranges vary across substitutes. The original component operates -25°C to 85°C. Upgrades such as 381LR331M400A022 and LQSW6331MELC30 extend to 105°C. The B43501C9337M000 expands the lower limit to -40°C. Application thermal requirements determine appropriate selection.

Q: What is the significance of lifetime ratings at different temperatures?

A: Lifetime ratings specify operational duration before capacitance degradation reaches specified limits. The original component provides 3000 Hrs @ 85°C. Extended lifetime options (B43501C9337M000 at 10000 Hrs @ 85°C, B43634C5337M000 at 8000 Hrs @ 85°C) support long-life applications. Higher temperature lifetime ratings (3000 Hrs @ 105°C) indicate superior thermal stability for elevated ambient conditions.

Q: Are RoHS and REACH compliance uniform across all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, identical to the original 380LX331M350A022. Moisture sensitivity level (MSL) rating of 1 (Unlimited) applies uniformly, eliminating special handling requirements during assembly and storage.

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