380LQ331M400K032 Equivalent & Substitute Parts

Part Overview

The 380LQ331M400K032 is a 330 µF, 400 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 through-hole mounting. The part is Active and ROHS3 compliant.

Equivalent and substitute parts are identified when design requirements permit tolerance in specific electrical or mechanical parameters while maintaining core functional compatibility. Substitutes are selected based on matching capacitance, voltage rating, mounting type, and package form factor, with allowable variations in ESR, lifetime ratings, ripple current handling, and physical height dimensions.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	-
Voltage - Rated	400	V
Polarization	Polar	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
Lead Spacing	0.394" (10.00mm)	-
Size / Dimension	1.181" Dia (30.00mm)	-
Operating Temperature Range	-25°C ~ 85°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution logic for the 380LQ331M400K032 is based on the following core parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 400 V (or higher)
Polarization: Polar
Mounting Type: Through Hole
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00mm)
Diameter: 1.181" (30.00mm)

Allowable Variation Parameters:

Height - Seated (Max): Variations permitted within mechanical envelope constraints
ESR (Equivalent Series Resistance): Variations permitted based on application ripple current requirements
Lifetime @ Temperature: Variations permitted based on thermal operating profile
Operating Temperature Range: Extended ranges acceptable
Ripple Current Ratings: Variations permitted based on application current demands

Substitute parts are grouped into three categories:

Direct Equivalents (380LQ Series): Parts maintaining identical electrical specifications with minor dimensional variations
Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Würth Elektronik, EPCOS-TDK, Chemi-Con, Nichicon, Rubycon) meeting all critical parameters
Upgrade Parts: Parts with higher voltage ratings (450 V) or extended lifetime ratings, suitable for applications requiring enhanced performance margins

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	ESR @ 120Hz (mOhm)	Lifetime @ Temp	Height (mm)	Ripple Current @ 120Hz (A)	Product Status
380LQ331M400K032	Cornell Dubilier	380LQ	330	400	603	2000 Hrs @ 85°C	37.00	1.9	Active
380LQ331M400K022	Cornell Dubilier	380LQ	330	400	603	2000 Hrs @ 85°C	32.00	1.9	Active
381LQ331M400K032	Cornell Dubilier	381LQ	330	400	553	2000 Hrs @ 105°C	37.00	1.44	Active
SLPX331M400E3P3	Cornell Dubilier	SLPX	330	400	603	3000 Hrs @ 85°C	30.00	2.05	Active
861011385023	Würth Elektronik	WCAP-AIG8	330	400	-	2000 Hrs @ 85°C	32.00	2.05	Active
B43644B9337M000	EPCOS - TDK	B43644	330	400	280	5000 Hrs @ 105°C	37.00	1.49	Active
ESMQ401VSN331MR30S	Chemi-Con	SMQ	330	400	-	2000 Hrs @ 85°C	30.00	1.9	Active
ESMR401VSN331MR25S	Chemi-Con	SMR	330	400	-	2000 Hrs @ 85°C	27.50	2.1	Active
LLS2G331MELB	Nichicon	LLS	330	400	-	3000 Hrs @ 85°C	35.00	2.05	Active
450USG330MEFCSN30X35	Rubycon	USG	330	450	-	3000 Hrs @ 85°C	37.00	2.1	Active
B43305B5337M000	EPCOS - TDK	B43305	330	450	410	2000 Hrs @ 85°C	37.00	1.86	Not For New Designs

Engineering Selection Recommendations

Direct Equivalent Selection (380LQ Series - Cornell Dubilier):

The 380LQ331M400K022 is a direct equivalent with identical electrical specifications (330 µF, 400 V, 603 mOhm ESR, 2000 Hrs @ 85°C). The primary difference is reduced seated height (32.00mm vs. 37.00mm). This part is suitable for applications where vertical space is constrained. Both parts are Active and ROHS3 compliant.

The 381LQ331M400K032 offers enhanced thermal performance with extended operating temperature range (-25°C ~ 105°C) and 2000 hour lifetime at 105°C. This part is suitable for applications requiring higher temperature stability. ESR is reduced to 553 mOhm, indicating improved performance characteristics. Active status and ROHS3 compliance maintained.

Extended Lifetime Selection (SLPX Series - Cornell Dubilier):

The SLPX331M400E3P3 provides 3000 hour lifetime at 85°C compared to 2000 hours in the main part, with identical ESR (603 mOhm) and voltage rating. Seated height is reduced to 30.00mm. This part is suitable for applications requiring extended service life. Active status and ROHS3 compliance maintained.

Cross-Manufacturer Equivalents:

The 861011385023 (Würth Elektronik WCAP-AIG8) matches all critical parameters with 2000 hour lifetime at 85°C and increased ripple current capability (2.05 A @ 120 Hz). Seated height is 32.00mm. Active status and ROHS3 compliance maintained.

The B43644B9337M000 (EPCOS-TDK B43644) offers superior performance with 5000 hour lifetime at 105°C, extended operating temperature range (-40°C ~ 105°C), and significantly reduced ESR (280 mOhm). Seated height matches the main part at 37.00mm. Active status and ROHS3 compliance maintained.

The ESMQ401VSN331MR30S (Chemi-Con SMQ) and ESMR401VSN331MR25S (Chemi-Con SMR) provide 2000 hour lifetime at 85°C with reduced seated heights (30.00mm and 27.50mm respectively). Both are RoHS compliant and suitable for space-constrained applications.

The LLS2G331MELB (Nichicon LLS) provides 3000 hour lifetime at 85°C with seated height of 35.00mm. Active status and ROHS3 compliance maintained.

Upgrade Selection (Higher Voltage Rating):

The 450USG330MEFCSN30X35 (Rubycon USG) and B43305B5337M000 (EPCOS-TDK B43305) both feature 450 V rating with 330 µF capacitance. These parts provide voltage margin enhancement for applications operating near 400 V limits. The Rubycon part offers 3000 hour lifetime at 85°C. The EPCOS part is marked "Not For New Designs" and should not be selected for new applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 380LQ331M400K032 with a 450 V rated capacitor?

A: Yes. The 450USG330MEFCSN30X35 (Rubycon) and B43305B5337M000 (EPCOS-TDK) both provide 450 V rating with identical 330 µF capacitance. Higher voltage ratings are acceptable in applications designed for 400 V operation, providing additional safety margin. The Rubycon part is recommended for new designs; the EPCOS part is marked "Not For New Designs."

Q: What is the difference between the 380LQ331M400K032 and 380LQ331M400K022?

A: Both parts are identical in electrical specifications (330 µF, 400 V, 603 mOhm ESR, 2000 Hrs @ 85°C). The primary difference is seated height: the K032 variant is 37.00mm tall, while the K022 variant is 32.00mm tall. Select the K022 for space-constrained applications.

Q: Which substitute offers the longest service life?

A: The B43644B9337M000 (EPCOS-TDK) provides 5000 hour lifetime at 105°C, the longest available. The SLPX331M400E3P3 (Cornell Dubilier) and LLS2G331MELB (Nichicon) both provide 3000 hour lifetime at 85°C.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are either ROHS3 compliant or RoHS compliant. The B43305B5337M000 (EPCOS-TDK) is marked "Not For New Designs" and should not be selected for new applications despite compliance status.

Q: Can I use a substitute with reduced ESR?

A: Yes. Reduced ESR (such as the 280 mOhm in the B43644B9337M000) indicates improved performance characteristics and lower heat generation. This is beneficial in applications with high ripple current demands. Verify that the substitute's ripple current rating meets application requirements.

Q: What is the significance of operating temperature range differences?

A: The 381LQ331M400K032 extends the upper operating temperature to 105°C (versus 85°C in the main part) and provides 2000 hour lifetime at this elevated temperature. The B43644B9337M000 extends the lower operating temperature to -40°C (versus -25°C in the main part). Select based on application thermal environment.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use through-hole mounting with radial, can-style snap-in packages. Lead spacing is 0.394" (10.00mm) for all parts. Diameter is 1.181" (30.00mm) for all parts. Seated height varies between 27.50mm and 37.00mm depending on the specific part selected.

Q: Which substitute has the highest ripple current rating?

A: The ESMR401VSN331MR25S (Chemi-Con SMR) provides 2.1 A @ 120 Hz ripple current, the highest among direct equivalents. The SLPX331M400E3P3 (Cornell Dubilier) provides 2.05 A @ 120 Hz. Select based on application ripple current requirements.

Q: Can I substitute with a part from a different manufacturer?

A: Yes. All cross-manufacturer equivalents (Würth Elektronik, EPCOS-TDK, Chemi-Con, Nichicon, Rubycon) meet the critical parameters of 330 µF, 400 V (or higher), through-hole mounting, and radial snap-in package. Verify compliance certifications and product status for your application requirements.

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