Equivalent & Substitute Parts for 381LX221M350J032

Part Overview

The Cornell Dubilier Electronics 381LX221M350J032 is a 220 µF, 350 V aluminum electrolytic capacitor in a radial, can snap-in package rated for 3000 hours at 105°C. This component is classified as Active and is suitable for general-purpose applications requiring through-hole mounting with a 10.00 mm lead spacing.

Substitute parts are necessary when the original component becomes unavailable, when design requirements change to accommodate higher voltage or extended lifetime specifications, or when alternative manufacturers offer equivalent electrical and mechanical characteristics within the same package form factor.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Tolerance	±20%	—
Voltage - Rated	350	V
Lifetime @ Temperature	3000 Hrs @ 105°C	—
Operating Temperature Range	-25°C to 105°C	—
Lead Spacing	10.00	mm
Package / Case	Radial, Can - Snap-In	—
Mounting Type	Through Hole	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict equivalence in the following parameters:

Critical Parameters (Must Match):

Capacitance: 220 µF
Tolerance: ±20%
Lead Spacing: 10.00 mm (0.394")
Package / Case: Radial, Can - Snap-In
Mounting Type: Through Hole
Polarization: Polar

Allowable Variation Parameters:

Voltage Rating: Equal to or greater than 350 V
Lifetime @ 105°C: Equal to or greater than 3000 hours
Operating Temperature Range: Equal to or encompassing -25°C to 105°C
Physical Dimensions: Within mechanical compatibility for snap-in mounting

Substitute parts are grouped into three categories:

Direct Equivalents (350 V Rating): Parts maintaining the exact 350 V voltage specification with identical or superior lifetime ratings and compatible physical dimensions.
Voltage Upgrades (400 V and 450 V Ratings): Parts with elevated voltage ratings that maintain all other critical parameters. These provide enhanced voltage margin and are electrically compatible in circuits designed for 350 V operation.
Similar Specifications (Alternative Manufacturers): Parts from different manufacturers meeting all critical electrical and mechanical parameters with potential variations in ripple current handling and ESR characteristics.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C	Lead Spacing (mm)	Size Dia (mm)	Height (mm)	Product Status
381LX221M350J032	Cornell Dubilier Electronics	220	350	±20%	3000 Hrs	10.00	25.00	37.00	Active
381LQ221M350H032	Cornell Dubilier Electronics	220	350	±20%	2000 Hrs	10.00	22.00	37.00	Active
381LX221M400J452	Cornell Dubilier Electronics	220	400	±20%	3000 Hrs	10.00	25.00	47.00	Active
LGN2V221MELA30	Nichicon	220	350	±20%	3000 Hrs	10.00	25.00	32.00	Active
LQS2V221MELA30	Nichicon	220	350	±20%	3000 Hrs	10.00	25.00	32.00	Active
400HXG220MEFCSN25X35	Rubycon	220	400	±20%	3000 Hrs	10.00	25.00	37.00	Active
400MXG220MEFCSN25X35	Rubycon	220	400	±20%	3000 Hrs	10.00	25.00	37.00	Active
450VXH220MEFCSN25X35	Rubycon	220	450	±20%	5000 Hrs	10.00	25.00	37.00	Active
B43508B9227M000	EPCOS - TDK Electronics	220	400	±20%	3000 Hrs	10.00	25.00	37.00	Not For New Designs
ELHS451VSN221MQ35S	Chemi-Con	220	450	±20%	5000 Hrs	10.00	25.40	37.50	Active
LGN2G221MELA35	Nichicon	220	400	±20%	3000 Hrs	10.00	25.00	37.00	Active

Engineering Selection Recommendations

Direct Equivalents at 350 V Rating:

The Nichicon LGN2V221MELA30 and LQS2V221MELA30 are direct electrical equivalents to the 381LX221M350J032, maintaining the 220 µF capacitance, 350 V rating, ±20% tolerance, and 3000-hour lifetime at 105°C. Both are ROHS3 compliant and Active products. The primary difference is reduced height (32.00 mm versus 37.00 mm), which provides a mechanical advantage in space-constrained applications while maintaining full electrical compatibility.

Voltage-Upgraded Alternatives (400 V Rating):

The Cornell Dubilier 381LX221M400J452, Rubycon 400HXG220MEFCSN25X35, Rubycon 400MXG220MEFCSN25X35, Nichicon LGN2G221MELA35, and EPCOS B43508B9227M000 all provide 400 V ratings with 220 µF capacitance and 3000-hour lifetime specifications. These components are suitable for applications where increased voltage margin is required. All are ROHS3 compliant and Active, except the EPCOS part which carries a "Not For New Designs" status and should not be selected for new circuit development.

Extended Lifetime Alternatives (450 V, 5000 Hours):

The Rubycon 450VXH220MEFCSN25X35 and Chemi-Con ELHS451VSN221MQ35S both provide 450 V ratings with extended 5000-hour lifetime at 105°C. These components are suitable for applications requiring enhanced reliability and voltage headroom. Both are ROHS3 compliant and Active. The Chemi-Con part has a slightly larger diameter (25.40 mm) and height (37.50 mm) compared to the main part.

Not Recommended:

The Cornell Dubilier 381LQ221M350H032 has a reduced lifetime specification of 2000 hours at 105°C, which is below the 3000-hour requirement of the main part, and a smaller diameter (22.00 mm), making it unsuitable as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 381LX221M350J032 with a higher voltage-rated capacitor such as the 400 V or 450 V versions?

A: Yes. Higher voltage-rated capacitors are electrically compatible in circuits designed for lower voltages. A 400 V or 450 V capacitor will function correctly in an application specified for 350 V operation. The elevated voltage rating provides additional safety margin and does not negatively affect circuit performance.

Q: What is the significance of the lead spacing parameter in substitution?

A: Lead spacing (10.00 mm) determines the physical distance between the two radial leads on the capacitor. This parameter must remain constant to ensure the component fits correctly into the printed circuit board holes without modification. All listed substitutes maintain the 10.00 mm lead spacing.

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

A: Yes. While all substitutes maintain the same lead spacing and mounting type, physical dimensions vary. The main part has a diameter of 25.00 mm and height of 37.00 mm. The Nichicon LGN2V221MELA30 and LQS2V221MELA30 are shorter (32.00 mm height), which may be advantageous in space-constrained designs. The Chemi-Con ELHS451VSN221MQ35S is slightly larger (25.40 mm diameter, 37.50 mm height). Verify that the selected substitute fits within the available board space.

Q: What does the "Not For New Designs" status mean for the EPCOS B43508B9227M000?

A: This designation indicates that the manufacturer has discontinued active development and support for this product line. While the part may still be available in inventory, it should not be selected for new circuit designs. Active alternatives from other manufacturers should be used instead.

Q: How do ripple current ratings affect my selection?

A: Ripple current capacity indicates the maximum AC current the capacitor can handle at specified frequencies without exceeding temperature limits. The main part supports 1.0 A at 120 Hz and 1.4 A at 20 kHz. Substitute parts have varying ripple current specifications. Select a substitute with ripple current ratings equal to or greater than your circuit requirements at the relevant frequency.

Q: Are all listed substitutes RoHS compliant?

A: All listed substitutes are RoHS3 compliant or RoHS compliant, meeting environmental and hazardous substance restrictions. The main part 381LX221M350J032 is ROHS3 compliant.

Q: Can I use the Nichicon LGN2V221MELA30 as a direct replacement without PCB modification?

A: The Nichicon LGN2V221MELA30 maintains the same lead spacing (10.00 mm), diameter (25.00 mm), and mounting type as the main part. However, it is 5.00 mm shorter (32.00 mm versus 37.00 mm). This dimensional difference does not affect electrical function and typically does not require PCB modification, but verify that the reduced height does not create mechanical clearance issues in your specific application.

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