Equivalent & Substitute Parts for LLS2D391MELZ

Part Overview

The LLS2D391MELZ is a 390 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 85°C and is designed for general-purpose applications requiring stable capacitance and ripple current handling in through-hole configurations. The part is Active status and ROHS3 compliant. Substitute parts are necessary when inventory constraints, thermal performance requirements, or specific ripple current specifications demand alternative solutions while maintaining electrical and mechanical compatibility.

Substiute Parts

LLS2D391MELZ

NichiconIn Stock: 1230LLS2D391MELZ Datasheet

Current PartRFQ

LGU2D391MELZ

NichiconIn Stock: 1002LGU2D391MELZ Datasheet

DirectRFQ

380LX391M200J012

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LLS2D391MELZ is determined by strict equivalence across the following critical parameters:

• Capacitance: 390 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage Rating: 200 V (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: 0.394" (10.00mm) (exact match required)

Substitute parts are classified as follows:

Direct Manufacturer Substitute: LGU2D391MELZ (Nichicon) - Same electrical specifications with enhanced thermal performance (3000 Hrs @ 105°C vs. 85°C) and identical mechanical footprint.

Similar Manufacturer Substitute: 380LX391M200J012 (Cornell Dubilier Electronics) - Equivalent electrical and mechanical specifications with minor dimensional variation in can diameter (0.984" vs. 0.866") and height (1.063" vs. 1.181"), maintaining lead spacing compatibility.

Parameter Comparison

Engineering Selection Recommendations

LGU2D391MELZ (Direct Substitute): This Nichicon part maintains identical electrical specifications and mechanical footprint to the LLS2D391MELZ while offering extended thermal performance rated to 105°C. Both parts are Active status and ROHS3 compliant. Selection of LGU2D391MELZ is appropriate when thermal margin or extended operating temperature range is required without PCB layout modification.

380LX391M200J012 (Similar Substitute): This Cornell Dubilier Electronics part provides equivalent electrical performance with specified ESR of 470 mOhm at 120 Hz. The can diameter increases from 22.00mm to 25.00mm, and height decreases from 30.00mm to 27.00mm. Lead spacing remains at 10.00mm, maintaining pin compatibility. Both parts are Active status and ROHS3 compliant. Selection of 380LX391M200J012 is appropriate when space constraints permit the larger diameter or when ESR specification is a design requirement. PCB layout verification is necessary to confirm clearance for the increased can diameter.

Frequently Asked Questions (FAQ)

Q: Can LGU2D391MELZ be used as a direct replacement for LLS2D391MELZ?

A: Yes. Both parts share identical capacitance (390 µF), voltage rating (200 V), tolerance (±20%), lead spacing (10.00mm), and mechanical package dimensions. The LGU2D391MELZ offers superior thermal performance (105°C vs. 85°C operating temperature). No PCB modifications are required.

Q: What are the dimensional differences between LLS2D391MELZ and 380LX391M200J012?

A: The 380LX391M200J012 has a larger can diameter (25.00mm vs. 22.00mm) and shorter height (27.00mm vs. 30.00mm). Lead spacing remains identical at 10.00mm. PCB layout must be verified to confirm clearance for the increased diameter before substitution.

Q: Are all three parts ROHS3 compliant?

A: Yes. LLS2D391MELZ, LGU2D391MELZ, and 380LX391M200J012 are all ROHS3 compliant and suitable for applications with RoHS requirements.

Q: What is the difference in ripple current handling between these parts?

A: Ripple current specifications vary across the three parts. LLS2D391MELZ handles 1.73 A at 120 Hz and 2.595 A at 50 kHz. LGU2D391MELZ handles 1.35 A at 120 Hz and 2.025 A at 50 kHz. 380LX391M200J012 handles 1.7 A at 120 Hz and 2.4 A at 20 kHz. Selection should be based on the specific ripple current frequency and magnitude in the target application.

Q: Can 380LX391M200J012 be used in applications requiring the full ripple current specification of LLS2D391MELZ at 50 kHz?

A: No. The 380LX391M200J012 specifies ripple current at 20 kHz (2.4 A), not 50 kHz. Direct comparison at 50 kHz is not possible with the provided data. Application requirements must be evaluated against the specified frequency and current rating of each candidate part.

Q: Are there any inventory considerations for these substitutes?

A: Inventory availability is subject to change. LLS2D391MELZ has 1207 pieces in stock, LGU2D391MELZ has 937 pieces, and 380LX391M200J012 has 782 pieces. Current inventory status should be confirmed at the time of procurement.