LGU2P391MELY Equivalent & Substitute Parts

Part Overview

The LGU2P391MELY is a 390 µF, 220 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts are identified to provide alternatives for inventory management, extended lead times, or upgraded voltage specifications while maintaining core electrical and mechanical compatibility.

Substiute Parts

LGU2P391MELY

NichiconIn Stock: 867LGU2P391MELY Datasheet

Current PartRFQ

LGN2P391MELY35

NichiconIn Stock: 1191LGN2P391MELY35 Datasheet

DirectRFQ

LGN2E391MELY40

NichiconIn Stock: 1144LGN2E391MELY40 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LGU2P391MELY are classified based on the following substitution criteria:

Direct Equivalent (Same Electrical Specifications):

• LGN2P391MELY35: Maintains identical capacitance (390 µF), voltage rating (220 V), tolerance (±20%), and operating temperature range (-40°C ~ 105°C). Differs only in physical height (37.00 mm vs. 45.00 mm) and ripple current specifications, which remain within acceptable operational parameters for general-purpose applications.

Upgrade Specification (Higher Voltage Rating):

• LGN2E391MELY40: Provides the same capacitance (390 µF) and tolerance (±20%) with an elevated voltage rating of 250 V, compared to the 220 V rating of the main part. This part maintains identical lead spacing (10.00 mm), diameter (20.00 mm), and mounting type. The increased voltage rating allows operation in higher-voltage circuits while preserving mechanical compatibility.

All substitute parts share the following critical parameters with the main part:

• Capacitance: 390 µF
• Tolerance: ±20%
• Lead Spacing: 0.394" (10.00 mm)
• Diameter: 0.787" (20.00 mm)
• Mounting Type: Through Hole
• Package Type: Radial, Can - Snap-In
• Polarization: Polar
• Operating Temperature: -40°C ~ 105°C
• Lifetime: 3000 Hrs @ 105°C
• RoHS Status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

LGN2P391MELY35 (Direct Equivalent): Select this part when the original LGU2P391MELY is unavailable or when inventory constraints require an alternative. This part maintains electrical equivalence with identical voltage rating (220 V) and capacitance (390 µF). The reduced physical height (37.00 mm vs. 45.00 mm) may provide space advantages in compact PCB layouts while maintaining full electrical compatibility. Both parts are ROHS3 compliant and active in production.

LGN2E391MELY40 (Upgrade Specification): Select this part when circuit design permits operation at the higher voltage rating of 250 V. The elevated voltage specification provides additional safety margin in applications where voltage transients or design headroom are considerations. Physical height (42.00 mm) falls between the main part and direct equivalent, and all mechanical parameters remain compatible with the original snap-in mounting configuration. This part is ROHS3 compliant and active in production.

Selection between substitute parts depends on PCB layout constraints (physical height availability) and circuit voltage requirements. All parts maintain identical lead spacing, diameter, and mounting type, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can LGN2P391MELY35 be used as a direct replacement for LGU2P391MELY?

A: Yes. Both parts share identical electrical specifications: 390 µF capacitance, 220 V voltage rating, ±20% tolerance, and 3000 hours lifetime at 105°C. The primary difference is physical height (37.00 mm vs. 45.00 mm). Lead spacing (10.00 mm) and diameter (20.00 mm) are identical, ensuring PCB compatibility. Verify available vertical clearance on the PCB before substitution.

Q: What is the difference between LGN2E391MELY40 and the main part LGU2P391MELY?

A: LGN2E391MELY40 has a higher voltage rating (250 V vs. 220 V) while maintaining the same capacitance (390 µF) and tolerance (±20%). All other electrical parameters, including operating temperature range and lifetime, remain identical. Physical height is 42.00 mm compared to 45.00 mm for the main part. This part is suitable for circuits designed for higher voltage operation.

Q: Are all substitute parts mechanically compatible with the original PCB?

A: Yes. All substitute parts maintain identical lead spacing (10.00 mm), diameter (20.00 mm), and snap-in mounting configuration. Physical height varies between parts (37.00 mm to 45.00 mm), so verify available vertical clearance on the PCB. All parts use through-hole mounting with radial, can snap-in package type.

Q: Do all parts meet the same compliance standards?

A: Yes. LGU2P391MELY, LGN2P391MELY35, and LGN2E391MELY40 are all ROHS3 compliant and REACH unaffected. All parts are manufactured by Nichicon and carry active product status.

Q: Can LGN2E391MELY40 be used in a circuit designed for 220 V operation?

A: Yes. LGN2E391MELY40 has a 250 V rating, which exceeds the 220 V requirement. Higher voltage-rated capacitors can be used in lower-voltage applications. The capacitance (390 µF) and tolerance (±20%) remain identical to the original specification.

Q: What ripple current specifications should be considered when selecting a substitute?

A: Ripple current values are provided for reference but do not affect substitution eligibility. LGU2P391MELY specifies 1.4 A @ 120 Hz and 2.1 A @ 50 kHz. LGN2P391MELY35 specifies 1.34 A @ 120 Hz and 2.01 A @ 50 kHz. LGN2E391MELY40 specifies 1.3 A @ 120 Hz and 1.95 A @ 50 kHz. All values remain within acceptable operational parameters for general-purpose applications. Verify circuit ripple current requirements against the selected part's specifications.