LLS2E391MELZ Equivalent & Substitute Parts

Part Overview

The LLS2E391MELZ is a 390 µF, 250 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. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application requirements where thermal or performance specifications may differ.

Substiute Parts

LLS2E391MELZ

NichiconIn Stock: 893LLS2E391MELZ Datasheet

Current PartRFQ

LGW2E391MELZ35

NichiconIn Stock: 1196LGW2E391MELZ35 Datasheet

UpgradeRFQ

LLS2E391MELA

NichiconIn Stock: 836LLS2E391MELA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LLS2E391MELZ are classified based on electrical and mechanical compatibility within the aluminum electrolytic capacitor category. Substitution is valid when the following parameters remain constant or exceed the main part specifications:

• Capacitance: 390 µF (exact match required)
• Voltage Rating: 250 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)

Substitute parts may differ in the following parameters:

• Operating Temperature Range: May extend to higher maximum temperatures
• Lifetime @ Temperature: May be rated at higher temperatures with same or greater hour rating
• Ripple Current: May be equal or higher
• Physical Dimensions (diameter and height): May vary within mechanical compatibility constraints
• Series designation: May differ based on manufacturer design evolution

Parameter Comparison

Engineering Selection Recommendations

LGW2E391MELZ35 (Upgrade Substitute)

The LGW2E391MELZ35 is classified as an upgrade substitute. It maintains identical electrical specifications (390 µF, 250 V, ±20% tolerance) and mechanical compatibility (lead spacing, snap-in package, through-hole mounting) while extending the maximum operating temperature to 105°C and providing lifetime rating at 105°C instead of 85°C. Ripple current ratings are also increased (1.95 A @ 120 Hz and 2.925 A @ 50 kHz versus 1.88 A and 2.82 A respectively). Physical dimensions remain identical. This part is suitable for applications requiring enhanced thermal performance or higher ripple current handling within the same form factor. Both parts are ROHS3 compliant and Active status.

LLS2E391MELA (Similar Substitute)

The LLS2E391MELA is classified as a similar substitute. It maintains identical electrical specifications (390 µF, 250 V, ±20% tolerance), operating temperature range (-40°C ~ 85°C), and lifetime rating (3000 Hrs @ 85°C). Lead spacing and mounting type are identical. Physical dimensions differ: the diameter increases from 0.866" (22.00 mm) to 0.984" (25.00 mm), while height decreases from 1.378" (35.00 mm) to 1.260" (32.00 mm). This part is suitable for applications where the larger diameter and reduced height are mechanically compatible with the PCB layout. Both parts are ROHS3 compliant and Active status.

Frequently Asked Questions (FAQ)

Q: Can LGW2E391MELZ35 be used as a direct replacement for LLS2E391MELZ?

A: Yes. The LGW2E391MELZ35 maintains all critical electrical parameters (capacitance, voltage, tolerance) and mechanical compatibility (lead spacing, snap-in package, through-hole mounting). The upgrade provides extended operating temperature range and improved ripple current ratings. No circuit modifications are required.

Q: What is the primary difference between LGW2E391MELZ35 and LLS2E391MELZ?

A: The LGW2E391MELZ35 extends the maximum operating temperature from 85°C to 105°C and provides lifetime rating at 105°C. Ripple current capacity is also increased. All other electrical and mechanical parameters remain equivalent.

Q: Can LLS2E391MELA be used in place of LLS2E391MELZ?

A: Yes, provided the PCB layout accommodates the dimensional differences. The LLS2E391MELA has a larger diameter (0.984" versus 0.866") and shorter height (1.260" versus 1.378"). All electrical parameters and lead spacing are identical. Verify mechanical clearance before substitution.

Q: Are all three parts ROHS3 compliant?

A: Yes. LLS2E391MELZ, LGW2E391MELZ35, and LLS2E391MELA are all ROHS3 compliant.

Q: What parameters must remain constant for a valid substitution?

A: Capacitance (390 µF), voltage rating (250 V), tolerance (±20%), polarization (polar), lead spacing (0.394" / 10.00 mm), package type (radial, can snap-in), and mounting type (through hole) must remain constant. Operating temperature range, lifetime rating, ripple current, and physical dimensions may vary within compatibility constraints.

Q: Can these parts be used interchangeably in high-ripple-current applications?

A: The LGW2E391MELZ35 provides higher ripple current ratings and is preferred for applications with elevated ripple current demands. LLS2E391MELZ and LLS2E391MELA have identical ripple current specifications and are suitable for equivalent ripple current requirements.