Equivalent & Substitute Parts for 381EL221M350K022

Part Overview

The Cornell Dubilier Electronics 381EL221M350K022 is a 220 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and design continuity. The 381EL series has been superseded by active product lines within Cornell Dubilier's portfolio, specifically the 381LQ and 381LX series, which maintain electrical and mechanical compatibility within defined parameter ranges.

Substiute Parts

381EL221M350K022

Cornell Dubilier Electronics (CDE)In Stock: 924381EL221M350K022 Datasheet

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381LQ221M350H032

Cornell Dubilier Electronics (CDE)In Stock: 2725381LQ221M350H032 Datasheet

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381LQ221M350J022

Cornell Dubilier Electronics (CDE)In Stock: 838381LQ221M350J022 Datasheet

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381LX221M350J032

Cornell Dubilier Electronics (CDE)In Stock: 1110381LX221M350J032 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 381EL221M350K022 is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Parameters:

• Capacitance: 220 µF (exact match required)
• Voltage Rating: 350 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 10.00 mm (exact match required)

Allowable Variation Parameters:

• ESR @ 120 Hz: Substitutes may vary within component design specifications
• Lifetime @ 105°C: Substitutes may have reduced lifetime ratings
• Case Diameter: Substitutes may vary (22.00 mm, 25.00 mm acceptable within snap-in envelope)
• Height - Seated: Substitutes may vary (32.00 mm, 37.00 mm acceptable within mounting clearance)
• Ripple Current: Substitutes may have higher ratings
• Product Status: Active substitutes preferred over obsolete

All substitute parts maintain ROHS3 compliance, MSL Level 1, and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

381LQ221M350J022 is the primary substitute for direct replacement applications. This part maintains identical electrical specifications for capacitance, voltage rating, and tolerance. The case diameter of 25.00 mm and height of 32.00 mm are compatible with standard through-hole PCB layouts designed for 30.00 mm diameter components. The 381LQ series is active product status, ensuring long-term availability and supply chain continuity. ESR characteristics remain within acceptable engineering tolerances at 754 mOhm versus 740 mOhm of the original part.

381LQ221M350H032 serves as an alternative where increased ripple current handling is required. This variant provides 1.44 A @ 120 Hz and 2.02 A @ 20 kHz, compared to 1 A and 1.4 A respectively in the original specification. The larger case diameter of 22.00 mm and increased height of 37.00 mm require verification of available PCB mounting clearance. Lifetime rating of 2000 hours at 105°C is reduced from the original 7000 hours.

381LX221M350J032 provides intermediate lifetime performance at 3000 hours @ 105°C, positioned between the 381LQ series and original 381EL specification. This part maintains identical ripple current ratings and lead spacing. The 25.00 mm case diameter and 37.00 mm height require clearance verification. Active product status ensures procurement availability.

All three substitute parts comply with ROHS3 and maintain MSL Level 1 classification. Selection should be based on specific application requirements regarding thermal lifetime, ripple current capacity, and available mounting envelope.

Frequently Asked Questions (FAQ)

Q: Can 381LQ221M350H032 be used in place of 381EL221M350K022 without PCB modification?

A: The 381LQ221M350H032 maintains the same 10.00 mm lead spacing and snap-in mounting interface. However, the case diameter increases from 30.00 mm to 22.00 mm and height increases to 37.00 mm. PCB layout verification is required to confirm adequate clearance around the component footprint and adjacent circuitry.

Q: What is the significance of the lifetime rating difference between 381EL221M350K022 (7000 Hrs) and 381LQ221M350J022 (2000 Hrs)?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation exceeds tolerance limits. The 381LQ series uses different internal construction, resulting in lower thermal stress accumulation. For applications operating continuously at elevated temperatures, the 381LX221M350J032 with 3000 hours provides intermediate performance.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed (381LQ221M350H032, 381LQ221M350J022, 381LX221M350J032) are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original 381EL221M350K022.

Q: What is the difference between 381LQ221M350H032 and 381LQ221M350J022?

A: Both parts share identical electrical specifications (220 µF, 350 V, ±20%, 754 mOhm ESR, 2000 Hrs @ 105°C). The primary differences are physical dimensions: 381LQ221M350H032 has 22.00 mm diameter and 37.00 mm height, while 381LQ221M350J022 has 25.00 mm diameter and 32.00 mm height. The 381LQ221M350J022 provides closer dimensional compatibility with the original 30.00 mm diameter specification.

Q: Can substitutes be intermixed in the same design?

A: No. Each substitute part has distinct physical dimensions and must be evaluated individually for PCB layout compatibility. Mixing different substitute parts in the same circuit board design is not recommended without explicit layout verification for each position.

Q: Which substitute offers the best long-term reliability?

A: The 381LX221M350J032 provides the highest thermal lifetime rating among active substitutes at 3000 hours @ 105°C, compared to 2000 hours for the 381LQ series. However, this remains below the original 381EL specification of 7000 hours. Application thermal environment assessment is required to determine acceptable lifetime performance.