Equivalent & Substitute Parts for 380LX181M350J032

Part Overview

The Cornell Dubilier Electronics 380LX181M350J032 is a 180 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The part operates across a temperature range of -25°C to 85°C with a rated lifetime of 3000 hours at 85°C, serving general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value	Unit
Capacitance	180	µF
Tolerance	±20%	—
Voltage - Rated	350	V
ESR @ 120 Hz	1.105	Ohm
Lifetime @ Temperature	3000 Hrs @ 85°C	—
Operating Temperature Range	-25°C to 85°C	—
Ripple Current @ 120 Hz	1.2	A
Ripple Current @ 20 kHz	1.7	A
Lead Spacing	0.394" (10.00 mm)	—
Diameter	0.984" (25.00 mm)	—
Height - Seated (Max)	1.457" (37.00 mm)	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can - Snap-In	—
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the 380LX181M350J032 is determined by strict equivalence across the following critical parameters:

Direct Electrical Equivalence Requirements:

Capacitance: 180 µF (fixed)
Tolerance: ±20% (fixed)
Voltage Rating: 350 V minimum (equal or higher acceptable)
ESR @ 120 Hz: within acceptable operational range
Lifetime @ Temperature: 3000 Hrs @ 85°C minimum

Mechanical Compatibility Requirements:

Lead Spacing: 0.394" (10.00 mm) (fixed for through-hole PCB compatibility)
Diameter: 0.984" (25.00 mm) (fixed for mounting envelope)
Height - Seated: 1.457" (37.00 mm) maximum (fixed for clearance)
Mounting Type: Through Hole (fixed)
Package / Case: Radial, Can - Snap-In (fixed)

Compliance Requirements:

RoHS3 Compliant (mandatory)
REACH Unaffected (mandatory)

Substitute parts are categorized as follows:

Direct Substitutes: Parts with identical electrical and mechanical specifications, differing only in series designation or minor ESR variance within acceptable limits.

Upgrade Substitutes: Parts with higher voltage ratings (400 V, 450 V) or extended temperature operating ranges (-25°C to 105°C) that maintain identical capacitance, tolerance, mechanical dimensions, and lead spacing. These provide enhanced performance margins while maintaining full backward compatibility.

Similar Parts: Parts with identical electrical specifications but different mechanical dimensions (diameter, height) or reduced lifetime ratings, suitable only when PCB layout permits dimensional variation.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	ESR @ 120 Hz (Ohm)	Lifetime @ Temp	Operating Temp (°C)	Diameter (mm)	Height (mm)	Product Status
380LX181M350J032	CDE	380LX	180	350	1.105	3000 Hrs @ 85°C	-25 to 85	25.00	37.00	Obsolete
SLPX181M350C1P3	CDE	SLPX	180	350	1.11	3000 Hrs @ 85°C	-25 to 85	25.00	27.00	Active
380LX181M450J032	CDE	380LX	180	450	1.11	3000 Hrs @ 85°C	-25 to 85	25.00	37.00	Active
381LR181M400J032	CDE	381LR	180	400	0.737	3000 Hrs @ 105°C	-25 to 105	25.00	37.00	Active
381LX181M400J032	CDE	381LX	180	400	—	3000 Hrs @ 105°C	-25 to 105	25.00	37.00	Active
381LX181M450J032	CDE	381LX	180	450	1.11	3000 Hrs @ 105°C	-25 to 105	25.00	37.00	Active
SLPX181M385C5P3	CDE	SLPX	180	385	1.11	3000 Hrs @ 85°C	-25 to 85	25.00	37.00	Active
SLPX181M420C5P3	CDE	SLPX	180	420	1.11	3000 Hrs @ 85°C	-25 to 85	25.00	37.00	Active
SLPX181M450C5P3	CDE	SLPX	180	450	1.47	3000 Hrs @ 85°C	-25 to 85	25.00	37.00	Active
380LQ181M350H022	CDE	380LQ	180	350	1.105	2000 Hrs @ 85°C	-25 to 85	22.00	32.00	Active
380LX181M350H042	CDE	380LX	180	350	0.920	3000 Hrs @ 85°C	-25 to 85	22.00	42.00	Active

Engineering Selection Recommendations

Direct Substitution (Same Voltage, Same Mechanical Envelope):

SLPX181M350C1P3 serves as a direct electrical equivalent with active product status. This part maintains 180 µF capacitance, 350 V rating, and 3000-hour lifetime at 85°C. The primary mechanical difference is reduced height (27.00 mm vs. 37.00 mm), which provides improved PCB clearance while maintaining identical lead spacing and diameter. ESR remains within acceptable operational tolerance at 1.11 Ohm @ 120 Hz.

Voltage Upgrade Substitutes (Higher Voltage Rating, Same Mechanical Envelope):

For applications requiring enhanced voltage margin or operating in higher-voltage circuits, the following active parts maintain identical mechanical dimensions (25.00 mm diameter, 37.00 mm height) and lead spacing:

380LX181M450J032: 450 V rating, 3000 Hrs @ 85°C, ESR 1.11 Ohm @ 120 Hz
381LR181M400J032: 400 V rating, 3000 Hrs @ 105°C, ESR 0.737 Ohm @ 120 Hz (lower ESR)
381LX181M400J032: 400 V rating, 3000 Hrs @ 105°C
381LX181M450J032: 450 V rating, 3000 Hrs @ 105°C, ESR 1.11 Ohm @ 120 Hz
SLPX181M385C5P3: 385 V rating, 3000 Hrs @ 85°C, ESR 1.11 Ohm @ 120 Hz
SLPX181M420C5P3: 420 V rating, 3000 Hrs @ 85°C, ESR 1.11 Ohm @ 120 Hz
SLPX181M450C5P3: 450 V rating, 3000 Hrs @ 85°C, ESR 1.47 Ohm @ 120 Hz

All upgrade substitutes are ROHS3 compliant and REACH unaffected. Parts designated 381LR and 381LX series extend operating temperature to 105°C, providing thermal margin for high-temperature applications.

Similar Parts (Dimensional Variation):

380LQ181M350H022 and 380LX181M350H042 maintain electrical equivalence but feature different mechanical dimensions. These are suitable only when PCB layout accommodates the specified diameter and height variations. 380LQ181M350H022 features reduced lifetime (2000 Hrs @ 85°C) compared to the original specification.

All recommended substitutes carry active product status and full compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can SLPX181M350C1P3 replace 380LX181M350J032 directly on the PCB?

A: SLPX181M350C1P3 maintains electrical equivalence and identical lead spacing (10.00 mm) and diameter (25.00 mm). The reduced height (27.00 mm vs. 37.00 mm) improves clearance. Direct substitution is compatible provided the PCB layout accommodates the shorter height. Verify clearance with adjacent components and mounting structures.

Q: What is the advantage of selecting a higher voltage-rated substitute such as 380LX181M450J032?

A: Higher voltage ratings provide operational margin in circuits subject to voltage transients or design tolerance stack-up. The 450 V rating accommodates 350 V nominal operation with additional safety margin. Mechanical dimensions and lead spacing remain identical, ensuring direct PCB compatibility. ESR and ripple current handling remain within acceptable ranges.

Q: Why do 381LR and 381LX series parts specify 3000 Hrs @ 105°C instead of 85°C?

A: Extended temperature rating indicates the capacitor maintains its specified lifetime at elevated ambient temperatures. A part rated 3000 Hrs @ 105°C inherently supports operation at 85°C with extended service life. This specification is advantageous for applications in thermally constrained environments or where long-term reliability at elevated temperatures is required.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. Compliance certifications are mandatory for procurement in regulated industries.

Q: What is the significance of ESR variation among substitute parts?

A: Equivalent Series Resistance (ESR) affects ripple current handling and heat dissipation. Lower ESR values (such as 0.737 Ohm in 381LR181M400J032) indicate improved performance under high-frequency ripple conditions. Higher ESR values (such as 1.47 Ohm in SLPX181M450C5P3) remain within acceptable operational limits for general-purpose applications. Selection depends on circuit ripple current requirements.

Q: Can 380LQ181M350H022 be used as a substitute despite different mechanical dimensions?

A: 380LQ181M350H022 maintains electrical equivalence but features reduced diameter (22.00 mm vs. 25.00 mm) and height (32.00 mm vs. 37.00 mm). Substitution is possible only if the PCB layout accommodates these dimensional changes. Additionally, this part specifies 2000 Hrs @ 85°C lifetime, which is reduced compared to the original 3000-hour specification. Evaluate application lifetime requirements before selection.

Q: What is the difference between SLPX and 380LX series designations?

A: Both series are manufactured by Cornell Dubilier Electronics and maintain equivalent electrical and mechanical specifications. Series designation reflects internal product line organization. SLPX series parts carry active product status, while 380LX series includes both obsolete and active variants. Selection should prioritize active product status for long-term availability.

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