Equivalent & Substitute Parts for 380LX331M400K042

Part Overview

The Cornell Dubilier Electronics 380LX331M400K042 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial temperature ranges. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified to address inventory availability, extended thermal performance requirements, or enhanced electrical characteristics while maintaining functional compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	330	µF	Critical - Must match exactly
Voltage Rating	400	V	Critical - Minimum acceptable rating
Tolerance	±20%	%	Critical - Must match or be tighter
Package Type	Radial, Can - Snap-In	-	Critical - Physical compatibility
Lead Spacing	0.394" (10.00mm)	in (mm)	Critical - PCB footprint compatibility
Mounting Type	Through Hole	-	Critical - Assembly method
ESR @ 120Hz	550	mOhm	Important - Electrical performance
Lifetime @ Temperature	3000 Hrs @ 85°C	-	Important - Reliability specification
Operating Temperature Range	-25°C ~ 85°C	°C	Important - Environmental limits
Ripple Current @ 120Hz	1.9	A	Important - Thermal stress indicator
RoHS Status	ROHS3 Compliant	-	Regulatory - Compliance requirement

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution relationship and parameter alignment:

Direct Manufacturer Substitutes maintain identical or superior electrical and mechanical specifications from the same manufacturer (Cornell Dubilier Electronics). These parts share the same capacitance (330 µF), voltage rating (400 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00mm), and mounting method (Through Hole). Variations in ESR, lifetime ratings, and operating temperature ranges are documented to enable informed selection based on application thermal requirements.

Similar Manufacturer Substitutes provide functional equivalence with documented parameter variations. These parts maintain core electrical specifications (330 µF, 400 V, ±20%) and physical compatibility (10.00mm lead spacing, snap-in package) but may differ in physical dimensions, lifetime ratings, or thermal performance characteristics. Selection depends on specific application constraints regarding physical space and thermal cycling requirements.

Upgrade Substitutes offer enhanced performance characteristics, including higher voltage ratings (450 V), extended lifetime ratings (5000 Hrs @ 105°C), or improved thermal operating ranges (-40°C ~ 105°C). These parts are electrically and mechanically compatible with the base part but provide additional design margin for demanding applications. Upgrade substitutes from alternative manufacturers (Rubycon, Nichicon, EPCOS - TDK Electronics) are included where specifications align with substitution criteria.

Key Substitution Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 400 V minimum (450 V acceptable as upgrade)
Tolerance: ±20% (exact match required)
Package: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00mm (exact match required)
Mounting: Through Hole (exact match required)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR @ 120Hz (mOhm)	Lifetime @ Temp	Operating Temp (°C)	Lead Spacing (mm)	Height (mm)	Inventory (Pcs)
380LX331M400K042	Cornell Dubilier	380LX	330	400	±20	550	3000 Hrs @ 85°C	-25 ~ 85	10.00	42.00	1041
380LQ331M400K022	Cornell Dubilier	380LQ	330	400	±20	603	2000 Hrs @ 85°C	-25 ~ 85	10.00	32.00	4092
381LR331M400K042	Cornell Dubilier	381LR	330	400	±20	402	3000 Hrs @ 105°C	-25 ~ 105	10.00	42.00	2177
SLPX331M400E3P3	Cornell Dubilier	SLPX	330	400	±20	603	3000 Hrs @ 85°C	-25 ~ 85	10.00	30.00	1101
380LQ331M400A012	Cornell Dubilier	380LQ	330	400	±20	603	2000 Hrs @ 85°C	-25 ~ 85	10.00	27.00	3005
380LX331M450K052	Cornell Dubilier	380LX	330	450	±20	550	3000 Hrs @ 85°C	-25 ~ 85	10.00	52.00	796
LPX331M400E7P3	Cornell Dubilier	LPX	330	400	±20	603	1000 Hrs @ 85°C	-40 ~ 85	10.00	40.00	2134
LLS2G331MELB	Nichicon	LLS	330	400	±20	-	3000 Hrs @ 85°C	-25 ~ 85	10.00	35.00	2284
450MXG330MEFCSN30X40	Rubycon	MXG	330	450	±20	-	3000 Hrs @ 105°C	-25 ~ 105	10.00	42.00	20200
450VXH330MEFCSN30X40	Rubycon	VXH	330	450	±20	-	5000 Hrs @ 105°C	-25 ~ 105	10.00	42.00	100400
B43508B5337M000	EPCOS - TDK Electronics	B43508	330	450	±20	370	3000 Hrs @ 105°C	-40 ~ 105	10.00	42.00	139300

Engineering Selection Recommendations

Direct Substitution (Same Voltage Rating - 400 V):

The 381LR331M400K042 from Cornell Dubilier provides direct substitution with enhanced thermal performance. This part maintains identical capacitance (330 µF), voltage rating (400 V), tolerance (±20%), and physical compatibility (10.00mm lead spacing, 42.00mm height). The 381LR series offers superior ESR characteristics (402 mOhm @ 120Hz versus 550 mOhm) and extended operating temperature range (-25°C ~ 105°C versus -25°C ~ 85°C). Lifetime rating remains equivalent at 3000 Hrs @ 85°C. This substitution is appropriate for applications requiring improved electrical efficiency and thermal margin without design modification.

The SLPX331M400E3P3 from Cornell Dubilier offers space-constrained applications with reduced physical height (30.00mm versus 42.00mm). Electrical specifications remain compatible with identical capacitance, voltage, and tolerance. ESR is higher at 603 mOhm @ 120Hz. This part is suitable for PCB layouts with vertical space limitations while maintaining full functional equivalence.

The 380LQ331M400K022 from Cornell Dubilier provides alternative inventory with reduced physical height (32.00mm). This part accepts reduced lifetime rating (2000 Hrs @ 85°C versus 3000 Hrs) and higher ESR (603 mOhm @ 120Hz). Selection is appropriate for non-critical applications with extended inventory availability (4092 Pcs).

The LLS2G331MELB from Nichicon provides cross-manufacturer substitution with identical electrical specifications (330 µF, 400 V, ±20%). Physical dimensions (35.00mm height) and lifetime rating (3000 Hrs @ 85°C) align with base part requirements. ESR data is not provided. This part is suitable for applications accepting alternative manufacturer qualification.

Upgrade Substitution (Higher Voltage Rating - 450 V):

The 380LX331M450K052 from Cornell Dubilier provides voltage upgrade within the same manufacturer series. This part maintains identical capacitance (330 µF), tolerance (±20%), and ESR characteristics (550 mOhm @ 120Hz) while increasing voltage rating to 450 V. Physical height increases to 52.00mm. This substitution is appropriate for applications requiring additional voltage margin or future design flexibility.

The 450MXG330MEFCSN30X40 from Rubycon provides upgrade substitution with enhanced thermal performance. This part maintains 330 µF capacitance and ±20% tolerance at 450 V rating. Operating temperature extends to 105°C with 3000 Hrs lifetime at elevated temperature. Physical dimensions match base part (30.00mm diameter, 42.00mm height). Extensive inventory availability (20200 Pcs) supports supply chain requirements.

The 450VXH330MEFCSN30X40 from Rubycon provides premium upgrade substitution with extended lifetime rating (5000 Hrs @ 105°C). This part maintains 330 µF capacitance and ±20% tolerance at 450 V rating with identical physical dimensions (42.00mm height). Operating temperature range extends to -25°C ~ 105°C. Exceptional inventory availability (100400 Pcs) ensures supply continuity. This substitution is appropriate for mission-critical applications requiring maximum reliability and thermal performance.

The B43508B5337M000 from EPCOS - TDK Electronics provides premium upgrade with superior ESR performance (370 mOhm @ 100Hz). This part maintains 330 µF capacitance and ±20% tolerance at 450 V rating with extended operating temperature (-40°C ~ 105°C). Lifetime rating is 3000 Hrs @ 105°C. Exceptional inventory availability (139300 Pcs) supports high-volume requirements. This substitution is appropriate for applications requiring lowest impedance characteristics and widest temperature operating range.

All substitute parts maintain RoHS3 compliance and REACH unaffected status consistent with base part regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 380LX331M400K042 with a 450 V rated capacitor?

A: Yes. Capacitors with higher voltage ratings are electrically compatible with lower voltage applications. The 450 V rated substitutes (380LX331M450K052, 450MXG330MEFCSN30X40, 450VXH330MEFCSN30X40, B43508B5337M000) provide additional design margin and are suitable for direct substitution. Physical dimensions may vary; verify PCB layout compatibility before implementation.

Q: What is the difference between Direct, Similar, and Upgrade substitutes?

A: Direct substitutes maintain identical voltage rating (400 V) with variations in ESR, lifetime, or physical dimensions. Similar substitutes provide functional equivalence with documented parameter variations. Upgrade substitutes offer higher voltage ratings (450 V) or extended thermal performance characteristics. All categories maintain identical capacitance (330 µF), tolerance (±20%), lead spacing (10.00mm), and mounting type (Through Hole).

Q: Does physical height variation affect compatibility?

A: Physical height variation affects PCB layout compatibility only. All substitute parts maintain identical lead spacing (10.00mm) and snap-in package configuration. Verify available vertical clearance on the PCB before selecting parts with different heights. Height variations range from 27.00mm to 52.00mm across substitute options.

Q: Which substitute offers the best thermal performance?

A: The 450VXH330MEFCSN30X40 from Rubycon offers the best thermal performance with 5000 Hrs lifetime at 105°C operating temperature. The B43508B5337M000 from EPCOS - TDK Electronics provides the lowest ESR (370 mOhm @ 100Hz) and widest operating temperature range (-40°C ~ 105°C). Selection depends on specific application thermal requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and REACH unaffected status consistent with the base part 380LX331M400K042 regulatory requirements.

Q: Can I use a substitute with lower ESR than the original part?

A: Yes. Lower ESR values indicate improved electrical efficiency and reduced heat generation. Substitutes with lower ESR (such as 381LR331M400K042 at 402 mOhm or B43508B5337M000 at 370 mOhm) are compatible and provide performance enhancement without design modification.

Q: What is the minimum voltage rating I can use as a substitute?

A: The minimum acceptable voltage rating is 400 V, matching the base part specification. Do not substitute with lower voltage ratings. Higher voltage ratings (450 V) are acceptable and provide additional design margin.

Q: How do I select between Cornell Dubilier and alternative manufacturer substitutes?

A: Selection depends on inventory availability, thermal requirements, and manufacturer qualification status. Cornell Dubilier direct substitutes (380LQ331M400K022, 381LR331M400K042, SLPX331M400E3P3) maintain same-manufacturer consistency. Alternative manufacturers (Nichicon LLS2G331MELB, Rubycon MXG/VXH series, EPCOS B43508B5337M000) provide enhanced performance or extended inventory. Verify manufacturer qualification requirements for your application before implementation.

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