Equivalent & Substitute Parts for LLS2D391MELY

Part Overview

The LLS2D391MELY is a 390 µF, 200 V aluminum electrolytic capacitor manufactured by Nichicon in the LLS series. This radial, can-style snap-in capacitor is rated for 3000 hours at 85°C and operates across the temperature range of -40°C to 85°C. The part is currently active in production status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this capacitor category.

Substiute Parts

LLS2D391MELY

NichiconIn Stock: 753LLS2D391MELY Datasheet

Current PartRFQ

LLS2D391MELZ

NichiconIn Stock: 1230LLS2D391MELZ Datasheet

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380LX391M200J012

Cornell Dubilier Electronics (CDE)In Stock: 841380LX391M200J012 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LLS2D391MELY are qualified based on the following criteria:

• Capacitance value: 390 µF (exact match required)
• Voltage rating: 200 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime specification: 3000 Hrs @ 85°C (exact match required)
• Operating temperature range: -40°C ~ 85°C (exact match required)
• Polarization: Polar (exact match required)
• Mounting type: Through Hole (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Lead spacing: 0.394" (10.00mm) (exact match required)
• Compliance: ROHS3 Compliant (exact match required)

Physical dimensions (diameter and height) may vary within the snap-in package envelope. Ripple current ratings and ESR values may differ between manufacturers while maintaining functional equivalence. All substitute parts must be active production status and suitable for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical and mechanical requirements for substitution. Selection should be based on:

• Availability: LLS2D391MELZ (Nichicon) offers 1207 units in stock; 380LX391M200J012 (CDE) offers 782 units; LLS2D391MELY offers 658 units.
• Physical envelope constraints: The LLS2D391MELY has the smallest diameter (20.00mm) and greatest height (35.00mm). The 380LX391M200J012 has the largest diameter (25.00mm) and smallest height (27.00mm). Verify PCB layout compatibility before selection.
• Manufacturer preference: Both Nichicon parts (LLS2D391MELY and LLS2D391MELZ) are from the same series and manufacturer. The CDE part (380LX391M200J012) is from a different manufacturer but maintains equivalent electrical performance.
• All parts are ROHS3 compliant and suitable for general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can LLS2D391MELZ be used as a direct replacement for LLS2D391MELY?

A: Yes. Both parts are from Nichicon's LLS series with identical electrical specifications (390 µF, 200 V, ±20%, 3000 Hrs @ 85°C). The primary difference is physical dimension: LLS2D391MELZ is 22.00mm diameter × 30.00mm height, while LLS2D391MELY is 20.00mm diameter × 35.00mm height. Verify PCB layout compatibility before substitution.

Q: Can the CDE 380LX391M200J012 replace the Nichicon LLS2D391MELY?

A: Yes. The 380LX391M200J012 meets all core electrical requirements (390 µF, 200 V, ±20%, 3000 Hrs @ 85°C) and is ROHS3 compliant. Physical dimensions differ: 25.00mm diameter × 27.00mm height. Confirm PCB footprint and height clearance before substitution.

Q: What are the key parameters that determine substitution eligibility?

A: Capacitance (390 µF), voltage rating (200 V), tolerance (±20%), lifetime (3000 Hrs @ 85°C), operating temperature range (-40°C ~ 85°C), polarization (Polar), mounting type (Through Hole), package type (Radial, Can - Snap-In), and lead spacing (10.00mm) must all match exactly. Physical dimensions may vary within the snap-in package envelope.

Q: Are there compliance differences between these parts?

A: All three parts are ROHS3 compliant and REACH unaffected. The 380LX391M200J012 has MSL rating of 1 (Unlimited), while the Nichicon parts list MSL as Not Applicable. This does not affect substitution eligibility for general-purpose applications.

Q: What is the difference in ripple current ratings?

A: Ripple current ratings vary slightly between manufacturers. LLS2D391MELY: 1.74 A @ 120 Hz, 2.61 A @ 50 kHz. LLS2D391MELZ: 1.73 A @ 120 Hz, 2.595 A @ 50 kHz. 380LX391M200J012: 1.7 A @ 120 Hz, 2.4 A @ 20 kHz. All values are within acceptable operating parameters for this capacitor category.