Equivalent & Substitute Parts for 381LX221M350H042

Part Overview

The Cornell Dubilier Electronics 381LX221M350H042 is a 220 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in configuration. This component is designed for general-purpose applications requiring through-hole mounting with a 3000-hour lifetime rating at 105°C. The part maintains active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

381LX221M350H042

Cornell Dubilier Electronics (CDE)In Stock: 814381LX221M350H042 Datasheet

Current PartRFQ

B43508A9227M000

EPCOS - TDK ElectronicsIn Stock: 1828B43508A9227M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 381LX221M350H042 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 220 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Physical Dimensions: 22.00 mm diameter, 42.00 mm height (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: Substitute parts must meet or exceed 350 V rating
• Operating Temperature Range: Substitute parts must support the required operating window
• Lifetime @ Temperature: Substitute parts must meet or exceed 3000 Hrs @ 105°C
• RoHS and REACH Compliance: Substitute parts must maintain equivalent compliance status

The EPCOS B43508A9227M000 qualifies as a substitute based on matching all mandatory parameters while providing upgraded voltage rating (400 V) and equivalent lifetime performance.

Parameter Comparison

Engineering Selection Recommendations

The EPCOS B43508A9227M000 is a qualified substitute for the Cornell Dubilier Electronics 381LX221M350H042 based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical capacitance (220 µF) and tolerance (±20%) specifications. The substitute provides a higher voltage rating (400 V versus 350 V), which is acceptable for applications designed for the original 350 V component. Both parts deliver equivalent lifetime performance at rated temperature (3000 Hrs @ 105°C).

Mechanical Compatibility: Physical dimensions, lead spacing, and package configuration are identical between the main part and substitute. Both components utilize radial, can snap-in packaging with through-hole mounting, ensuring direct PCB compatibility without layout modifications.

Compliance and Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

Operational Range: The substitute extends the lower operating temperature limit to -40°C compared to the main part's -25°C minimum, providing enhanced performance in cold-temperature environments while maintaining the same upper temperature limit of 105°C.

Frequently Asked Questions (FAQ)

Q: Can the B43508A9227M000 be used as a direct replacement for the 381LX221M350H042?

A: Yes. Both parts share identical capacitance (220 µF), tolerance (±20%), physical dimensions (22.00 mm diameter, 42.00 mm height), lead spacing (10.00 mm), and package configuration (radial, can snap-in). The substitute meets all mandatory mechanical and electrical compatibility requirements for direct PCB substitution.

Q: What is the significance of the higher voltage rating on the substitute part?

A: The B43508A9227M000 is rated for 400 V compared to the 381LX221M350H042's 350 V rating. In applications designed for 350 V operation, the higher-rated substitute provides additional voltage margin and is electrically compatible. The substitute will not degrade performance in circuits operating at or below 350 V.

Q: Are there any temperature-related differences between these parts?

A: The substitute part (B43508A9227M000) operates from -40°C to 105°C, while the main part (381LX221M350H042) operates from -25°C to 105°C. The substitute provides an extended low-temperature operating range. Both parts maintain identical 3000-hour lifetime ratings at 105°C.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 381LX221M350H042 and B43508A9227M000 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: Is the ESR specification important for this substitution?

A: The B43508A9227M000 specifies ESR of 560 mOhm at 100 Hz. The main part does not provide ESR specification in the available data. For applications where ESR is a critical parameter, the substitute's specified value of 560 mOhm should be verified against circuit requirements.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes. Identical lead spacing (10.00 mm), physical dimensions, and snap-in package configuration ensure mechanical and electrical interchangeability on PCBs designed for the 381LX221M350H042 without requiring layout modifications or rework.