Equivalent & Substitute Parts for 381LX181M350H032

Part Overview

The Cornell Dubilier Electronics 381LX181M350H032 is a 180 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration. This component is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

381LX181M350H032

Cornell Dubilier Electronics (CDE)In Stock: 744381LX181M350H032 Datasheet

Current PartRFQ

400MXG180MEFCSN22X35

RubyconIn Stock: 1483400MXG180MEFCSN22X35 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for aluminum electrolytic capacitors is determined by strict alignment of the following parameters:

Primary Substitution Criteria:

• Capacitance value: 180 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Operating temperature range: -25°C to 105°C (exact match required)
• Lead spacing: 10.00 mm (exact match required)
• Case diameter: 22.00 mm (exact match required)
• Height - seated (max): 37.00 mm (exact match required)
• Mounting type: Through Hole (exact match required)
• Package / case: Radial, Can - Snap-In (exact match required)
• Polarization: Polar (exact match required)
• RoHS3 compliance: Required
• Moisture sensitivity level: 1 (Unlimited) (exact match required)

Voltage Consideration: The substitute part 400MXG180MEFCSN22X35 operates at 400 V rated voltage, which exceeds the main part specification of 350 V. This represents an upgrade path suitable for applications where higher voltage margin is beneficial or required. The elevated voltage rating does not compromise compatibility in circuits designed for 350 V operation.

Parameter Comparison

Engineering Selection Recommendations

381LX181M350H032 (Cornell Dubilier Electronics): Select this part for applications requiring the specified 350 V rating with established CDE component qualification. The part maintains active product status with full RoHS3 compliance and REACH unaffected designation. ESR specification of 1.11 Ohm @ 120 Hz is documented.

400MXG180MEFCSN22X35 (Rubycon): This substitute part is suitable for applications where 400 V rated voltage provides design margin or where higher ripple current capability (1.22 A @ 120 Hz, 1.708 A @ 10 kHz) is required. The part maintains active product status with identical RoHS3 compliance and REACH unaffected designation. Mechanical and thermal specifications align with the main part. Selection of this substitute is appropriate when sourcing flexibility or enhanced voltage margin is a design consideration.

Both parts satisfy identical compliance requirements (RoHS3, REACH unaffected, MSL 1) and maintain equivalent mechanical form factors for through-hole snap-in mounting applications.

Frequently Asked Questions (FAQ)

Q: Can the 400MXG180MEFCSN22X35 directly replace the 381LX181M350H032 in existing designs?

A: Yes. Both parts share identical capacitance (180 µF), tolerance (±20%), operating temperature range (-25°C to 105°C), thermal lifetime (3000 Hrs @ 105°C), lead spacing (10.00 mm), case diameter (22.00 mm), height (37.00 mm), and mounting configuration (radial, can snap-in through-hole). The 400 V rating of the substitute exceeds the 350 V specification, providing voltage margin without compatibility issues.

Q: What are the mechanical compatibility requirements for substitution?

A: Mechanical compatibility requires exact alignment of lead spacing (10.00 mm), case diameter (22.00 mm), seated height (37.00 mm), and mounting type (through-hole snap-in). Both listed parts meet these requirements identically.

Q: Are there differences in ripple current handling between these parts?

A: The substitute part 400MXG180MEFCSN22X35 specifies higher ripple current capability: 1.22 A @ 120 Hz and 1.708 A @ 10 kHz, compared to 870 mA @ 120 Hz for the main part. This represents enhanced performance in the substitute.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity). Both maintain active product status.

Q: What is the significance of the voltage rating difference?

A: The substitute part operates at 400 V rated voltage versus 350 V for the main part. In circuits designed for 350 V operation, the higher rating provides additional voltage margin and does not create compatibility issues. The substitute is suitable for direct replacement in 350 V applications.

Q: Are there documented ESR differences?

A: The main part specifies ESR of 1.11 Ohm @ 120 Hz. The substitute part does not provide ESR specification in the available data. ESR performance should be verified against application requirements if this parameter is critical to circuit design.