381LX151M350K012 Equivalent & Substitute Parts Reference

Part Overview

The 381LX151M350K012 is a 150 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is Active status and ROHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved through alternative manufacturers while maintaining core functional parameters: capacitance value, voltage rating, tolerance, polarization, mounting type, and package form factor. Higher voltage-rated alternatives and extended lifetime options are available from Nichicon and Rubycon manufacturers.

Key Parameters

Parameter	Value	Unit
Capacitance	150	µF
Voltage - Rated	350	V
Tolerance	±20%	-
Polarization	Polar	-
Lifetime @ Temperature	3000 Hrs @ 105°C	-
Operating Temperature Range	-25°C ~ 105°C	-
Lead Spacing	0.394" (10.00 mm)	-
Size / Dimension	1.181" Dia (30.00 mm)	-
Height - Seated (Max)	1.063" (27.00 mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution logic is based on the following criteria derived from the provided parameters:

Primary Substitution Criteria:

Capacitance: 150 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Size / Dimension: 1.181" Dia (30.00 mm) (exact match required)
Height - Seated (Max): 1.063" (27.00 mm) (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)

Secondary Substitution Criteria (Allowable Variations):

Voltage - Rated: 350 V (minimum); higher voltage ratings are acceptable as upgrades
Lifetime @ Temperature: 3000 Hrs @ 105°C (minimum); extended lifetime is acceptable
Ripple Current: variations acceptable within application requirements
Manufacturer: alternative qualified manufacturers acceptable

Substitute Parts Identified:

Direct Equivalent (Same Voltage): 381LQ151M350H022 (Cornell Dubilier Electronics) - identical electrical specifications with different series designation and reduced lifetime (2000 Hrs vs. 3000 Hrs)
Voltage Upgrade Options (450 V): 450VXG150MEFC30X25, 450VXG150MEFCSN30X25 (Rubycon); LGN2W151MELB25, LGX2W151MELB25, LQS2W151MELB25 (Nichicon) - all rated 450 V with extended or equivalent lifetime ratings

All substitute parts maintain identical physical dimensions, lead spacing, mounting configuration, and operating temperature range as the main part.

Parameter Comparison

Parameter	381LX151M350K012 (Main)	381LQ151M350H022	450VXG150MEFC30X25	450VXG150MEFCSN30X25	LGN2W151MELB25	LGX2W151MELB25	LQS2W151MELB25
Manufacturer	Cornell Dubilier Electronics	Cornell Dubilier Electronics	Rubycon	Rubycon	Nichicon	Nichicon	Nichicon
Series	381LX	381LQ	VXG	VXG	LGN	LGX	LQS
Capacitance	150 µF	150 µF	150 µF	150 µF	150 µF	150 µF	150 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	350 V	350 V	450 V	450 V	450 V	450 V	450 V
Lifetime @ Temp.	3000 Hrs @ 105°C	2000 Hrs @ 105°C	5000 Hrs @ 105°C	5000 Hrs @ 105°C	3000 Hrs @ 105°C	5000 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	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar	Polar	Polar
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)	0.866" Dia (22.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.063" (27.00 mm)	1.260" (32.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	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	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ripple Current @ 120 Hz	800 mA	820 mA	1.08 A	1.08 A	790 mA	930 mA	790 mA
Ripple Current @ High Frequency	1.1 A @ 20 kHz	1.15 A @ 20 kHz	1.512 A @ 10 kHz	1.512 A @ 10 kHz	1.1297 A @ 50 kHz	1.3299 A @ 50 kHz	1.1297 A @ 50 kHz
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

The 381LQ151M350H022 (Cornell Dubilier Electronics) is a direct electrical equivalent at 350 V rating. However, this part exhibits dimensional incompatibility: the can diameter is 0.866" (22.00 mm) versus the required 1.181" (30.00 mm), and the seated height is 1.260" (32.00 mm) versus the required 1.063" (27.00 mm). This part is not suitable for direct PCB replacement without mechanical redesign.

Recommended Substitutes (Voltage Upgrade Category):

All 450 V rated alternatives maintain identical physical dimensions and lead spacing as the main part 381LX151M350K012:

450VXG150MEFC30X25 and 450VXG150MEFCSN30X25 (Rubycon VXG Series) - Both parts are electrically and mechanically interchangeable. These parts provide 450 V rating with extended 5000-hour lifetime at 105°C. Ripple current capability is increased to 1.08 A @ 120 Hz and 1.512 A @ 10 kHz. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are maintained.
LGN2W151MELB25 (Nichicon LGN Series) - 450 V rated with 3000-hour lifetime at 105°C. Maintains identical physical dimensions and lead spacing. Ripple current: 790 mA @ 120 Hz, 1.1297 A @ 50 kHz. ROHS3 compliant.
LGX2W151MELB25 (Nichicon LGX Series) - 450 V rated with extended 5000-hour lifetime at 105°C. Identical physical dimensions and lead spacing. Ripple current: 930 mA @ 120 Hz, 1.3299 A @ 50 kHz. ROHS3 compliant.
LQS2W151MELB25 (Nichicon LQS Series) - 450 V rated with 3000-hour lifetime at 105°C. Identical physical dimensions and lead spacing. Ripple current: 790 mA @ 120 Hz, 1.1297 A @ 50 kHz. ROHS3 compliant.

Selection Criteria:

All recommended substitutes are Active status products with full ROHS3 compliance
All maintain the required operating temperature range of -25°C to 105°C
All are through-hole mounted with radial, can snap-in package configuration
All have identical lead spacing (0.394" / 10.00 mm) and physical dimensions (1.181" Dia / 30.00 mm, 1.063" height / 27.00 mm)
Higher voltage rating (450 V vs. 350 V) provides design margin without performance degradation
Extended lifetime options (5000 Hrs) available from Rubycon and Nichicon LGX series for enhanced reliability

Frequently Asked Questions (FAQ)

Q: Can 381LQ151M350H022 be used as a direct replacement for 381LX151M350K012?

A: No. While both parts share identical electrical specifications (150 µF, 350 V, ±20% tolerance), the 381LQ151M350H022 has different physical dimensions. The can diameter is 0.866" (22.00 mm) instead of 1.181" (30.00 mm), and the seated height is 1.260" (32.00 mm) instead of 1.063" (27.00 mm). These dimensional differences prevent direct PCB mounting without mechanical redesign.

Q: Are 450 V rated parts suitable replacements for the 350 V main part?

A: Yes. The 450 V rated alternatives (Rubycon VXG series and Nichicon LGN, LGX, LQS series) are electrically and mechanically compatible. Higher voltage rating provides additional design margin and does not degrade performance in 350 V applications. All substitute parts maintain identical physical dimensions, lead spacing, mounting type, and operating temperature range.

Q: What is the difference between the Rubycon 450VXG150MEFC30X25 and 450VXG150MEFCSN30X25?

A: Both parts are electrically and mechanically identical. They share the same capacitance (150 µF), voltage rating (450 V), tolerance (±20%), lifetime (5000 Hrs @ 105°C), physical dimensions, and ripple current specifications. The designation difference reflects internal manufacturing or packaging variations not affecting functional performance.

Q: Which substitute offers the longest operational lifetime?

A: The Rubycon 450VXG150MEFC30X25, 450VXG150MEFCSN30X25, and Nichicon LGX2W151MELB25 all provide 5000-hour lifetime at 105°C, compared to the main part's 3000-hour rating. This represents a 67% increase in rated operational life.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the main part 381LX151M350K012.

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

A: The main part 381LX151M350K012 is rated for 800 mA @ 120 Hz and 1.1 A @ 20 kHz. The Rubycon VXG series substitutes provide higher ripple current capability (1.08 A @ 120 Hz, 1.512 A @ 10 kHz). Nichicon LGN and LQS series maintain similar low-frequency ripple current (790 mA @ 120 Hz) with higher high-frequency capability (1.1297 A @ 50 kHz). Nichicon LGX series provides the highest ripple current (930 mA @ 120 Hz, 1.3299 A @ 50 kHz).

Q: Can the main part 381LX151M350K012 be used in applications requiring 450 V rating?

A: No. The main part is rated for maximum 350 V. Applications requiring 450 V operation must use one of the 450 V rated substitute parts to ensure safe and reliable operation within specified electrical limits.

Q: Are there inventory considerations for substitute selection?

A: Yes. Current inventory levels vary: 381LX151M350K012 (877 Pcs), 381LQ151M350H022 (1807 Pcs), 450VXG150MEFC30X25 (1203 Pcs), 450VXG150MEFCSN30X25 (1049 Pcs), LGN2W151MELB25 (5747 Pcs), LGX2W151MELB25 (938 Pcs), LQS2W151MELB25 (1096 Pcs). Nichicon LGN2W151MELB25 has the highest available stock.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message