381LQ561M350A032 Equivalent & Substitute Parts

Part Overview

The 381LQ561M350A032 is a 560 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is rated for general-purpose applications with a 2000-hour lifetime at 105°C and an operating temperature range of -25°C to 105°C. The part is Active in product status and ROHS3 compliant.

Equivalent and substitute parts are identified when design requirements allow for variations in voltage rating, manufacturer, series designation, or thermal lifetime while maintaining the core electrical specifications of 560 µF capacitance and ±20% tolerance. Substitutes are necessary when the primary part becomes unavailable, when higher voltage ratings are required for circuit margin, or when alternative manufacturers offer improved performance characteristics such as lower ESR or extended operational lifetime.

Key Parameters

Parameter	Value	Unit
Capacitance	560	µF
Voltage - Rated	350	V
Tolerance	±20%	-
ESR @ 120Hz	296	mOhm
Lifetime @ 105°C	2000	Hrs
Operating Temperature Range	-25 to 105	°C
Ripple Current @ 120 Hz	1.5	A
Ripple Current @ 20 kHz	2.1	A
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height - Seated (Max)	37.00	mm
Package / Case	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 381LQ561M350A032 is determined by the following criteria:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 560 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)

Mechanical Parameters (Non-Negotiable):

Package / Case: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Diameter: 35.00 mm (exact match required)

Allowable Variations:

Voltage - Rated: 350 V (minimum); higher ratings (400 V, 450 V) are acceptable as upgrades
ESR: Lower values improve performance; higher values are acceptable within design margins
Lifetime @ 105°C: 2000 Hrs (minimum); extended lifetimes (3000 Hrs) are acceptable as upgrades
Operating Temperature Range: -25°C to 105°C (minimum); extended lower temperature limits (-40°C) are acceptable
Manufacturer: Cornell Dubilier Electronics, Nichicon, EPCOS - TDK Electronics
Series: 381LQ, LGN, LQS, LGG, LGM, B43640

Substitutes are grouped into two categories: Direct Equivalents (same voltage rating and thermal lifetime) and Upgrades (higher voltage rating and/or extended thermal lifetime).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120Hz (mOhm)	Lifetime @ 105°C (Hrs)	Ripple Current @ 120 Hz (A)	Height (mm)	Substitution Type
381LQ561M350A032	Cornell Dubilier Electronics	381LQ	560	350	±20%	296	2000	1.5	37.00	Primary Part
LGN2V561MELC35	Nichicon	LGN	560	350	±20%	-	3000	1.5	37.00	Direct Equivalent
LQS2V561MELC35	Nichicon	LQS	560	350	±20%	-	3000	1.5	37.00	Direct Equivalent
381LQ561M400A042	Cornell Dubilier Electronics	381LQ	560	400	±20%	326	2000	1.9	42.00	Upgrade
LGG2G561MELC35	Nichicon	LGG	560	400	±20%	-	2000	1.63	37.00	Upgrade
LGM2W561MELC35	Nichicon	LGM	560	450	±20%	-	2000	1.2	37.50	Upgrade
B43640B9567M000	EPCOS - TDK Electronics	B43640	560	400	±20%	200	2000	1.85	37.00	Upgrade

Engineering Selection Recommendations

Direct Equivalents (LGN2V561MELC35, LQS2V561MELC35):

These Nichicon parts maintain the 350 V voltage rating and 10.00 mm lead spacing of the primary part. Both are rated for 3000 hours at 105°C, providing extended thermal lifetime compared to the 2000-hour rating of the 381LQ561M350A032. Both parts are ROHS3 compliant and Active in product status. These substitutes are suitable for direct replacement in applications where the 350 V rating is specified and higher thermal reliability is beneficial.

Upgrade Options (381LQ561M400A042, LGG2G561MELC35, B43640B9567M000, LGM2W561MELC35):

These parts offer higher voltage ratings (400 V or 450 V) and are suitable for applications requiring increased voltage margin or where circuit design permits higher-rated components. The 381LQ561M400A042 maintains the same manufacturer (Cornell Dubilier Electronics) with a 400 V rating. The LGG2G561MELC35 and B43640B9567M000 provide 400 V ratings with improved ESR characteristics (B43640B9567M000 specifies 200 mOhm @ 100Hz). The LGM2W561MELC35 offers the highest voltage rating at 450 V. All upgrade options are ROHS3 compliant and Active in product status.

Height Considerations:

The 381LQ561M400A042 has a maximum seated height of 42.00 mm, which exceeds the primary part's 37.00 mm height. The LGM2W561MELC35 has a maximum seated height of 37.50 mm. These dimensional differences must be verified against available board space before selection.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 V rated capacitor in place of a 350 V rated capacitor?

A: Yes. A higher voltage rating provides increased safety margin and is electrically compatible with circuits designed for the lower voltage. The 400 V and 450 V upgrade options (381LQ561M400A042, LGG2G561MELC35, B43640B9567M000, LGM2W561MELC35) are suitable substitutes when circuit board space permits the dimensional variations.

Q: What is the difference between Direct Equivalents and Upgrades?

A: Direct Equivalents (LGN2V561MELC35, LQS2V561MELC35) maintain the 350 V voltage rating of the primary part while offering extended thermal lifetime (3000 hours vs. 2000 hours). Upgrades provide higher voltage ratings (400 V or 450 V) and are selected when additional voltage margin is required or when improved performance characteristics are beneficial.

Q: Are all substitute parts mechanically compatible with the primary part?

A: All substitute parts share the same 10.00 mm lead spacing, 35.00 mm diameter, and radial snap-in package. However, the 381LQ561M400A042 has a maximum seated height of 42.00 mm compared to 37.00 mm for the primary part, and the LGM2W561MELC35 has a maximum seated height of 37.50 mm. Verify available board space before selection.

Q: What does ESR mean and why does it matter?

A: ESR (Equivalent Series Resistance) is the internal resistance of the capacitor measured at a specified frequency. Lower ESR values indicate better performance, particularly in high-ripple-current applications. The B43640B9567M000 specifies 200 mOhm @ 100Hz, which is lower than the primary part's 296 mOhm @ 120Hz, providing improved performance in ripple-current-sensitive circuits.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and suitable for applications requiring RoHS compliance.

Q: What is the difference between the Nichicon LGN and LQS series?

A: Both the LGN2V561MELC35 and LQS2V561MELC35 are Nichicon 560 µF, 350 V aluminum electrolytic capacitors with identical electrical specifications (3000-hour lifetime at 105°C, 1.5 A ripple current at 120 Hz, 37.00 mm height). The series designation indicates different product lines within Nichicon's portfolio. Both are suitable direct equivalents for the primary part.

Q: Can I use a capacitor with a longer thermal lifetime (3000 hours vs. 2000 hours)?

A: Yes. Extended thermal lifetime indicates improved reliability and longer operational life at elevated temperatures. The Nichicon direct equivalents (LGN2V561MELC35, LQS2V561MELC35) offer 3000-hour ratings and are suitable substitutes when extended reliability is desired.

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