380LX331M450A042 Equivalent & Substitute Parts Reference

Part Overview

The Cornell Dubilier Electronics 380LX331M450A042 is a 330 µF, 450 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 high-voltage energy storage and filtering. The 380LX series operates across -25°C to 85°C with a rated lifetime of 3000 hours at 85°C and an equivalent series resistance (ESR) of 603 mOhm. Identification of equivalent and substitute parts becomes necessary when addressing supply chain constraints, design optimization for thermal performance, or when enhanced operational specifications are required for extended service life or elevated temperature environments.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	330	µF	Critical - Must match exactly
Voltage Rating	450	V	Critical - Must match or exceed
Tolerance	±20%	%	Critical - Must match
ESR (Equivalent Series Resistance)	603	mOhm	Important - Affects ripple current handling
Lifetime @ Temperature	3000	Hrs @ 85°C	Important - Determines service life
Operating Temperature Range	-25 to 85	°C	Important - Defines thermal envelope
Lead Spacing	10.00	mm	Critical - PCB layout compatibility
Case Diameter	35.00	mm	Important - Physical fit constraints
Height (Seated Max)	42.00	mm	Important - Vertical clearance
Mounting Type	Through Hole	-	Critical - Assembly method
Package Type	Radial, Can - Snap-In	-	Critical - Mechanical interface
RoHS Status	ROHS3 Compliant	-	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitution of the 380LX331M450A042 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance value: 330 µF (exact match required)
Voltage rating: 450 V (minimum; higher ratings acceptable)
Tolerance: ±20% (exact match required)
Lead spacing: 10.00 mm (exact match required for PCB compatibility)
Mounting type: Through Hole (exact match required)
Package configuration: Radial, Can - Snap-In (exact match required)

Performance Parameters Affecting Substitution:

ESR (Equivalent Series Resistance): Lower values indicate improved ripple current handling and reduced heat generation
Lifetime @ Temperature: Extended hours at rated temperature indicate superior reliability
Operating temperature range: Extended upper temperature limit enables operation in higher thermal environments
Case diameter and height: Physical dimensions must accommodate PCB layout constraints

Compliance Parameters:

RoHS3 compliance status
REACH unaffected status
Product status (Active vs. Not For New Designs)

Substitute parts are grouped into three categories: Direct equivalents (matching all critical parameters with minor performance variations), upgrade options (enhanced thermal or electrical performance), and similar alternatives (matching core specifications with dimensional or performance trade-offs).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	ESR (mOhm)	Lifetime @ Temp	Temp Range (°C)	Case Dia (mm)	Height (mm)	Product Status
380LX331M450A042	Cornell Dubilier	380LX	330	450	±20%	603	3000 Hrs @ 85°C	-25 to 85	35.00	42.00	Active
380LQ331M450A022	Cornell Dubilier	380LQ	330	450	±20%	600 @ 120Hz	2000 Hrs @ 85°C	-25 to 85	35.00	32.00	Active
381LR331M450A042	Cornell Dubilier	381LR	330	450	±20%	402 @ 120Hz	3000 Hrs @ 105°C	-25 to 105	35.00	42.00	Active
381LX331M450A042	Cornell Dubilier	381LX	330	450	±20%	Not specified	3000 Hrs @ 105°C	-25 to 105	35.00	42.00	Active
380LX331M450K052	Cornell Dubilier	380LX	330	450	±20%	550 @ 120Hz	3000 Hrs @ 85°C	-25 to 85	30.00	52.00	Active
SLPX331M450E7P3	Cornell Dubilier	SLPX	330	450	±20%	804 @ 120Hz	3000 Hrs @ 85°C	-25 to 85	30.00	40.00	Active
B43501A5337M000	EPCOS - TDK	B43501	330	450	±20%	400 @ 100Hz	10000 Hrs @ 85°C	-40 to 85	35.00	42.00	Not For New Designs
B43504B5337M000	EPCOS - TDK	B43504	330	450	±20%	410 @ 100Hz	3000 Hrs @ 105°C	-40 to 105	35.00	42.00	Not For New Designs
B43509B5337M000	EPCOS - TDK	B43509	330	450	±20%	310 @ 100Hz	3000 Hrs @ 105°C	-40 to 105	35.00	42.00	Active
ETXH451VSN331MA40S	Chemi-Con	TXH	330	450	±20%	Not specified	10000 Hrs @ 105°C	-25 to 105	35.00	42.00	Active
MAL215957331E3	Vishay Beyschlag	159 PUL-SI	330	450	±20%	300	5000 Hrs @ 105°C	-25 to 105	35.00	42.00	Active

Engineering Selection Recommendations

Direct Equivalent - Dimensional Match with Reduced Lifetime:

The 380LQ331M450A022 maintains identical capacitance, voltage, tolerance, and lead spacing specifications. However, the seated height is reduced to 32.00 mm (versus 42.00 mm on the main part), and lifetime is reduced to 2000 hours at 85°C. This part is suitable for applications where vertical clearance is constrained and the reduced service life is acceptable. Both parts carry Active product status and ROHS3 compliance.

Upgrade Options - Enhanced Thermal Performance:

The 381LR331M450A042 and 381LX331M450A042 extend the operating temperature range to -25°C to 105°C and maintain 3000-hour lifetime at the elevated 105°C temperature. Both maintain the 35.00 mm case diameter and 42.00 mm height, ensuring direct mechanical compatibility. The 381LR series specifies 402 mOhm ESR at 120 Hz, representing a 33% reduction compared to the main part's 603 mOhm. Both are Active status products suitable for thermal-demanding applications.

Upgrade Option - Extended Lifetime at Elevated Temperature:

The ETXH451VSN331MA40S (Chemi-Con TXH series) provides 10000-hour lifetime at 105°C, the highest thermal endurance among all listed alternatives. Identical case dimensions (35.00 mm diameter, 42.00 mm height) and lead spacing ensure mechanical compatibility. Operating range extends to -25°C to 105°C. Active product status and RoHS compliance are confirmed.

Upgrade Option - Superior ESR Performance:

The MAL215957331E3 (Vishay Beyschlag 159 PUL-SI series) delivers 300 mOhm ESR, the lowest value in the substitute list, representing a 50% reduction from the main part. This part supports 5000-hour lifetime at 105°C with identical case dimensions and lead spacing. Active product status and ROHS3 compliance are confirmed.

Alternative - Compact Dimensional Variant:

The 380LX331M450K052 maintains the same series designation and electrical specifications as the main part but reduces case diameter to 30.00 mm while increasing height to 52.00 mm. ESR is 550 mOhm at 120 Hz. This configuration is suitable for applications with horizontal space constraints but adequate vertical clearance.

Legacy Alternatives - Not For New Designs:

The B43501A5337M000 and B43504B5337M000 (EPCOS - TDK Electronics) are classified as "Not For New Designs." While they meet electrical specifications and offer extended lifetimes (10000 hours and 3000 hours respectively at 85°C and 105°C), their obsolescence status restricts their use to legacy system maintenance or repair applications only.

Active Upgrade - Lowest ESR Performance:

The B43509B5337M000 (EPCOS - TDK B43509 series) is Active product status and delivers 310 mOhm ESR at 100 Hz, the second-lowest ESR value available. It supports 3000-hour lifetime at 105°C with extended temperature range (-40°C to 105°C) and identical case dimensions to the main part.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 380LX331M450A042 with the 380LQ331M450A022?

A: The 380LQ331M450A022 is electrically equivalent with matching capacitance (330 µF), voltage (450 V), tolerance (±20%), and lead spacing (10.00 mm). However, the seated height is reduced from 42.00 mm to 32.00 mm, and lifetime is reduced from 3000 hours to 2000 hours at 85°C. Substitution is valid only if the reduced height accommodates your PCB layout and the shorter service life meets application requirements.

Q: What is the primary advantage of upgrading to the 381LR331M450A042 or 381LX331M450A042?

A: Both 381-series parts extend the maximum operating temperature from 85°C to 105°C while maintaining 3000-hour lifetime at this elevated temperature. The 381LR additionally specifies 402 mOhm ESR at 120 Hz, a 33% reduction from the main part's 603 mOhm. These upgrades are beneficial for applications operating in high-temperature environments or requiring improved ripple current handling.

Q: Are there dimensional constraints I should consider when selecting a substitute?

A: Yes. The main part specifies 35.00 mm case diameter and 42.00 mm seated height. Most direct equivalents and upgrades maintain these dimensions. However, the 380LX331M450K052 reduces diameter to 30.00 mm while increasing height to 52.00 mm, and the SLPX331M450E7P3 uses 30.00 mm diameter with 40.00 mm height. Verify PCB layout constraints before selecting these alternatives.

Q: What does "Not For New Designs" mean for the EPCOS parts?

A: Parts designated "Not For New Designs" are in obsolescence phase. While they remain functionally equivalent and available in inventory, manufacturers recommend against specifying them in new product development. These parts are appropriate only for legacy system maintenance, repair, or replacement applications where the original part number must be preserved.

Q: Which substitute offers the best ESR performance?

A: The MAL215957331E3 (Vishay Beyschlag) delivers 300 mOhm ESR, the lowest value among all listed alternatives, representing a 50% reduction from the main part's 603 mOhm. Lower ESR reduces heat generation and improves ripple current handling capability. This part maintains identical case dimensions and lead spacing while supporting 5000-hour lifetime at 105°C.

Q: Can I use a substitute with a higher voltage rating?

A: Yes. Substitution with a higher voltage rating is electrically valid. However, all listed alternatives are rated at 450 V, matching the main part exactly. Higher voltage ratings would increase physical size and cost without providing functional benefit for this application.

Q: What is the difference between ESR measured at 100 Hz versus 120 Hz?

A: ESR values vary with frequency due to the capacitor's internal impedance characteristics. The main part specifies 603 mOhm without frequency notation, while alternatives specify ESR at either 100 Hz or 120 Hz. These frequency-specific measurements reflect the capacitor's performance under different operating conditions. Direct numerical comparison between different measurement frequencies requires caution; however, lower absolute ESR values consistently indicate superior performance.

Q: Which substitute provides the longest service life?

A: The ETXH451VSN331MA40S (Chemi-Con TXH series) and B43501A5337M000 (EPCOS B43501 series) both offer 10000-hour lifetime at 85°C. The ETXH451VSN331MA40S is Active product status, while the B43501 is "Not For New Designs." For new applications, the ETXH451VSN331MA40S is the recommended choice for maximum service life.

Q: Are all substitutes RoHS3 compliant?

A: All listed substitutes carry either ROHS3 Compliant or RoHS Compliant status. The main part and most alternatives are explicitly ROHS3 Compliant. The ETXH451VSN331MA40S is listed as RoHS Compliant. All parts are REACH Unaffected. Verify specific compliance documentation for your regulatory requirements.

Q: Can I use the SLPX331M450E7P3 as a direct replacement?

A: The SLPX331M450E7P3 matches electrical specifications (330 µF, 450 V, ±20% tolerance, 10.00 mm lead spacing) but uses a smaller case diameter (30.00 mm versus 35.00 mm) and different height (40.00 mm versus 42.00 mm). ESR is higher at 804 mOhm at 120 Hz. Substitution is valid only if the reduced case diameter fits your PCB layout and the higher ESR does not compromise ripple current performance.

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