Equivalent & Substitute Parts for 381LX271M350A012

Part Overview

The Cornell Dubilier Electronics 381LX271M350A012 is a 270 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part maintains active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified to address application requirements for higher voltage ratings, enhanced ripple current handling, or alternative manufacturer sourcing while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Capacitance	270	µF
Voltage - Rated	350	V
Tolerance	±20%	-
Lifetime @ Temperature	3000 Hrs @ 105°C	-
Operating Temperature Range	-25°C ~ 105°C	-
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height - Seated (Max)	27.00	mm
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the 381LX271M350A012 is determined by the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 270 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Diameter: 35.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)
Lifetime @ Temperature: 3000 Hrs @ 105°C (exact match required)

Allowable Variation Parameters:

Voltage - Rated: Equal to or greater than 350 V (uprating permitted)
Height - Seated (Max): Equal to or less than specified dimension (downrating permitted)
Ripple Current: Equal to or greater than specified values (uprating permitted)

All substitute parts listed maintain identical capacitance, tolerance, lead spacing, diameter, mounting configuration, and thermal specifications. Voltage ratings are equal to or exceed the original specification, and ripple current capabilities meet or exceed original ratings.

Parameter Comparison

Parameter	381LX271M350A012 (Main)	381LX271M400A022	LGNW6271MELC25	LQSW6271MELC25
Manufacturer	Cornell Dubilier Electronics	Cornell Dubilier Electronics	Nichicon	Nichicon
Series	381LX	381LX	LGN	LQS
Capacitance	270 µF	270 µF	270 µF	270 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	350 V	400 V	420 V	420 V
Lifetime @ Temp.	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Ripple Current @ 120 Hz	1.1 A	1.2 A	1.25 A	1.25 A
Ripple Current @ High Frequency	1.5 A @ 20 kHz	1.7 A @ 20 kHz	1.7875 A @ 50 kHz	1.7875 A @ 50 kHz
Lead Spacing	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Diameter	35.00 mm	35.00 mm	35.00 mm	35.00 mm
Height - Seated (Max)	27.00 mm	32.00 mm	27.00 mm	27.00 mm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

381LX271M400A022 (Cornell Dubilier Electronics)

This substitute provides a voltage rating increase from 350 V to 400 V within the same manufacturer series. The part maintains identical capacitance, tolerance, lead spacing, and diameter specifications. Height increases from 27.00 mm to 32.00 mm; applications with height constraints must verify clearance. Ripple current capability increases to 1.2 A @ 120 Hz and 1.7 A @ 20 kHz. All compliance certifications (RoHS3, REACH Unaffected) are maintained. This option is suitable for applications requiring higher voltage margin while remaining within the Cornell Dubilier 381LX series.

LGNW6271MELC25 (Nichicon LGN Series)

This substitute provides a voltage rating increase to 420 V with identical height (27.00 mm) to the original part. Capacitance, tolerance, lead spacing, and diameter remain unchanged. Ripple current capability increases to 1.25 A @ 120 Hz and 1.7875 A @ 50 kHz. RoHS3 compliance and REACH Unaffected status are maintained. The LGN series represents an upgrade option from an alternative manufacturer with enhanced voltage and ripple current specifications.

LQSW6271MELC25 (Nichicon LQS Series)

This substitute provides identical electrical and mechanical specifications to the LGNW6271MELC25, including 420 V rating and 27.00 mm height. Capacitance, tolerance, lead spacing, and diameter match the original part exactly. Ripple current capability is 1.25 A @ 120 Hz and 1.7875 A @ 50 kHz. RoHS3 compliance and REACH Unaffected status are maintained. The LQS series represents an alternative Nichicon option with equivalent performance characteristics.

All substitute parts maintain active product status and full regulatory compliance. Selection between substitutes depends on application voltage requirements, available inventory, and manufacturer preference.

Frequently Asked Questions (FAQ)

Q: Can the 381LX271M400A022 be used as a direct replacement for the 381LX271M350A012?

A: Yes, the 381LX271M400A022 is electrically and mechanically compatible. It maintains identical capacitance (270 µF), tolerance (±20%), lead spacing (10.00 mm), and diameter (35.00 mm). The voltage rating increases from 350 V to 400 V, which is an uprating and does not affect compatibility. Height increases from 27.00 mm to 32.00 mm; applications with height constraints must verify available clearance.

Q: What is the difference between the Nichicon LGNW6271MELC25 and LQSW6271MELC25?

A: Both parts are Nichicon aluminum electrolytic capacitors with identical electrical specifications: 270 µF capacitance, ±20% tolerance, 420 V rating, and 3000 Hrs @ 105°C lifetime. They share the same lead spacing (10.00 mm), diameter (35.00 mm), and height (27.00 mm). The difference lies in the series designation (LGN versus LQS). Both are suitable substitutes with equivalent performance.

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

A: Yes. Voltage uprating is permitted for direct substitution. A 400 V or 420 V rated capacitor can be used in an application designed for 350 V operation. The higher voltage rating provides additional safety margin and does not degrade performance in lower voltage applications.

Q: Are there height restrictions when selecting a substitute?

A: Yes. The 381LX271M400A022 has a maximum seated height of 32.00 mm, compared to 27.00 mm for the original part and the Nichicon substitutes. Applications with limited vertical clearance must verify that the increased height does not interfere with circuit board layout or enclosure constraints. The Nichicon LGNW6271MELC25 and LQSW6271MELC25 maintain the original 27.00 mm height.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All listed substitutes are RoHS3 compliant and REACH Unaffected. They meet identical regulatory requirements for use in equivalent applications.

Q: What is the difference in ripple current capability between the main part and substitutes?

A: The original 381LX271M350A012 is rated for 1.1 A @ 120 Hz and 1.5 A @ 20 kHz. The 381LX271M400A022 increases to 1.2 A @ 120 Hz and 1.7 A @ 20 kHz. The Nichicon substitutes (LGNW6271MELC25 and LQSW6271MELC25) provide 1.25 A @ 120 Hz and 1.7875 A @ 50 kHz. Higher ripple current ratings indicate improved thermal performance under AC stress conditions.

Q: Can I substitute based on manufacturer preference alone?

A: No. Substitution must be based on electrical and mechanical parameter compatibility. All listed substitutes maintain identical capacitance, tolerance, lead spacing, diameter, mounting type, and thermal specifications. Manufacturer selection should be made only after confirming that all critical parameters meet application requirements.

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