380LQ331M450K042 Equivalent & Substitute Parts Reference

Part Overview

The 380LQ331M450K042 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 380LQ series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is Active status and ROHS3 compliant, with 1144 units currently in stock.

Equivalent and substitute parts are identified when design requirements allow flexibility in specific electrical or mechanical parameters while maintaining core functional compatibility. This reference provides engineering-grade alternatives based on strict parameter matching within the aluminum electrolytic capacitor category.

Key Parameters

Parameter	380LQ331M450K042 Value	Substitution Relevance
Capacitance	330 µF	Critical - must match exactly
Voltage Rating	450 V	Critical - must match exactly
Tolerance	±20%	Critical - must match exactly
Package Type	Radial, Can - Snap-In	Critical - must match exactly
Lead Spacing	0.394" (10.00mm)	Critical - PCB footprint compatibility
Mounting Type	Through Hole	Critical - assembly method
Operating Temperature	-25°C ~ 85°C	Application-dependent
ESR @ 120Hz	603 mOhm	Performance parameter - lower values preferred
Lifetime @ 85°C	2000 Hrs	Reliability parameter
RoHS Status	ROHS3 Compliant	Regulatory requirement

Substitute Part Grouping Explanation

Substitution logic for the 380LQ331M450K042 is based on the following mandatory matching criteria:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 450 V
Tolerance: ±20%
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00mm)
Mounting Type: Through Hole

Flexible Parameters (May Vary Within Limits):

ESR (Equivalent Series Resistance): Lower values indicate improved performance; higher values acceptable if application permits
Lifetime @ Temperature: Extended lifetimes (3000 Hrs, 5000 Hrs) provide enhanced reliability; shorter lifetimes not acceptable
Physical Dimensions (Diameter, Height): Variations acceptable if PCB layout permits; snap-in mechanism must remain compatible
Operating Temperature Range: Extended ranges (-40°C to 105°C) provide broader application coverage; narrower ranges acceptable if application temperature is within specified limits
Manufacturer: Different manufacturers acceptable if all critical parameters match

Regulatory Compliance:

RoHS3 Compliance required for all substitutes
REACH Unaffected status maintained across all alternatives

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ 120Hz	Lifetime @ Temp	Diameter	Height (Max)	Lead Spacing	RoHS Status
380LQ331M450K042	CDE	330 µF	450 V	±20%	603 mOhm @ 120Hz	2000 Hrs @ 85°C	1.181" (30mm)	1.654" (42mm)	0.394" (10mm)	ROHS3
SLPX331M450E7P3	CDE	330 µF	450 V	±20%	804 mOhm @ 120Hz	3000 Hrs @ 85°C	1.181" (30mm)	1.575" (40mm)	0.394" (10mm)	ROHS3
380LQ331M450A022	CDE	330 µF	450 V	±20%	600 mOhm @ 120Hz	2000 Hrs @ 85°C	1.378" (35mm)	1.260" (32mm)	0.394" (10mm)	ROHS3
380LX331M450A042	CDE	330 µF	450 V	±20%	603 mOhm	3000 Hrs @ 85°C	1.378" (35mm)	1.654" (42mm)	0.394" (10mm)	ROHS3
380LX331M450K052	CDE	330 µF	450 V	±20%	550 mOhm @ 120Hz	3000 Hrs @ 85°C	1.181" (30mm)	2.047" (52mm)	0.394" (10mm)	ROHS3
450USG330MEFCSN30X35	Rubycon	330 µF	450 V	±20%	Not specified	3000 Hrs @ 85°C	1.181" (30mm)	1.457" (37mm)	0.394" (10mm)	ROHS3
B43508B5337M000	EPCOS - TDK Electronics	330 µF	450 V	±20%	370 mOhm @ 100Hz	3000 Hrs @ 105°C	1.181" (30mm)	1.654" (42mm)	0.394" (10mm)	ROHS3
B43644A5337M000	EPCOS - TDK Electronics	330 µF	450 V	±20%	90 mOhm @ 100Hz	5000 Hrs @ 105°C	1.181" (30mm)	1.654" (42mm)	0.394" (10mm)	ROHS3
ESMQ451VSN331MR40S	Chemi-Con	330 µF	450 V	±20%	Not specified	2000 Hrs @ 85°C	1.181" (30mm)	1.575" (40mm)	0.394" (10mm)	RoHS Compliant
ESMR451VSN331MR30S	Chemi-Con	330 µF	450 V	±20%	Not specified	2000 Hrs @ 85°C	1.181" (30mm)	1.280" (32.50mm)	0.394" (10mm)	RoHS Compliant
LLS2W331MELB	Nichicon	330 µF	450 V	±20%	Not specified	3000 Hrs @ 85°C	1.181" (30mm)	1.575" (40mm)	0.394" (10mm)	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

The 380LQ331M450A022 (CDE, 380LQ series) is the closest direct substitute, matching the main part in capacitance, voltage, tolerance, lead spacing, and ESR performance. The primary difference is physical dimensions (35mm diameter vs. 30mm), which requires PCB layout verification. This part maintains identical 2000 Hrs @ 85°C lifetime and ROHS3 compliance.

Enhanced Reliability Alternatives:

Parts with extended lifetime ratings (3000 Hrs or 5000 Hrs @ 85°C or 105°C) provide improved long-term reliability:

SLPX331M450E7P3 (CDE): 3000 Hrs @ 85°C, compact 30mm diameter, 2562 units in stock
380LX331M450A042 (CDE): 3000 Hrs @ 85°C, 35mm diameter, 931 units in stock
380LX331M450K052 (CDE): 3000 Hrs @ 85°C, superior 550 mOhm ESR, 796 units in stock
B43644A5337M000 (EPCOS - TDK): 5000 Hrs @ 105°C, superior 90 mOhm ESR, extended temperature range, 2767 units in stock
LLS2W331MELB (Nichicon): 3000 Hrs @ 85°C, 30mm diameter, 1,000,400 units in stock

Cross-Manufacturer Alternatives:

All substitute parts maintain ROHS3 or RoHS compliance and REACH Unaffected status. Manufacturers include Rubycon, EPCOS - TDK Electronics, Chemi-Con, and Nichicon. Selection among manufacturers depends on supply chain requirements and inventory availability.

Performance Considerations:

Parts with lower ESR values (B43644A5337M000 at 90 mOhm, B43508B5337M000 at 370 mOhm, 380LX331M450K052 at 550 mOhm) deliver superior ripple current handling and reduced heat generation compared to the main part (603 mOhm). These are preferred for high-ripple-current applications.

Physical Fit Verification:

PCB layout must accommodate dimensional variations. The main part is 30mm diameter × 42mm height. Compact alternatives (30mm diameter) include SLPX331M450E7P3, 450USG330MEFCSN30X35, B43508B5337M000, B43644A5337M000, ESMQ451VSN331MR40S, ESMR451VSN331MR30S, and LLS2W331MELB. Larger diameter options (35mm) include 380LQ331M450A022 and 380LX331M450A042.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 380LQ331M450K042 with a part having different capacitance or voltage rating?

A: No. Capacitance and voltage rating are critical parameters that determine circuit performance and safety. Any substitute must have exactly 330 µF capacitance and 450 V voltage rating. Deviations will alter circuit behavior and may cause component failure or system malfunction.

Q: What does ESR (Equivalent Series Resistance) mean, and why does it vary among substitutes?

A: ESR represents the internal resistance of the capacitor at a specified frequency (typically 100 Hz or 120 Hz). Lower ESR values indicate better performance in high-ripple-current applications and reduced heat generation. The main part has 603 mOhm ESR; substitutes range from 90 mOhm to 804 mOhm. Lower ESR is advantageous but not required for all applications. Selection depends on ripple current demands in your circuit.

Q: Why do some substitutes have longer lifetime ratings (3000 Hrs or 5000 Hrs vs. 2000 Hrs)?

A: Lifetime rating indicates the expected operational duration at the specified temperature (typically 85°C or 105°C) before capacitance degradation reaches 80% of initial value. Extended lifetimes reflect improved internal construction and materials. Longer-lifetime parts provide enhanced reliability and are preferred for mission-critical applications. The main part specifies 2000 Hrs @ 85°C; longer-lifetime alternatives are direct upgrades in reliability.

Q: Can I use a substitute with a different physical diameter or height?

A: Physical dimensions must be verified against your PCB layout and mechanical constraints. The main part is 30mm diameter × 42mm height. Substitutes range from 30mm to 35mm diameter and 32mm to 52mm height. Verify that the selected substitute fits within available PCB space and does not interfere with adjacent components. Lead spacing (10mm) is identical across all substitutes, ensuring footprint compatibility.

Q: What is the difference between ROHS3 and RoHS compliance?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) is the current EU regulatory standard restricting hazardous materials in electrical equipment. RoHS Compliant indicates general RoHS compliance without specifying the version. ROHS3 is the more stringent current standard. Most substitutes are ROHS3 compliant; some Chemi-Con parts are listed as RoHS Compliant. Both meet current regulatory requirements.

Q: Are all substitutes suitable for my application?

A: Substitutes are electrically and mechanically compatible based on the parameters provided. However, final selection depends on your specific application requirements: operating temperature range, ripple current demands, space constraints, and reliability targets. Consult your circuit design specifications and thermal analysis to confirm suitability. Extended-lifetime and low-ESR alternatives are recommended for demanding applications.

Q: What is the significance of operating temperature range (-25°C ~ 85°C vs. -40°C ~ 105°C)?

A: Operating temperature range defines the safe working environment for the capacitor. The main part operates from -25°C to 85°C. Some substitutes (EPCOS - TDK parts) extend to -40°C to 105°C, providing broader application coverage and higher temperature margin. If your application operates within the main part's range, standard-range substitutes are acceptable. Extended-range parts are preferred for extreme-temperature environments.

Q: Why is inventory quantity listed for each part?

A: Inventory availability affects procurement lead time and supply chain reliability. The main part has 1144 units in stock. Substitutes range from 139 units (B43508B5337M000) to 1,000,400 units (LLS2W331MELB). High-inventory parts ensure faster delivery and reduced supply risk. Consider inventory status when selecting substitutes for time-sensitive projects.

Q: Can I mix different substitute parts in the same circuit or system?

A: Yes, provided all substitutes meet the critical parameter requirements (330 µF, 450 V, ±20%, radial snap-in, 10mm lead spacing). Mixing manufacturers and series is acceptable. However, for consistency and simplified maintenance, using identical parts across a system is recommended. If mixing is necessary, ensure all parts are ROHS3 compliant and REACH Unaffected.

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