LGL2G391MELZ50

The LGL2G391MELZ50 is a snap-in, radial-can aluminum electrolytic capacitor from Nichicon's LGL series. It delivers 390 µF capacitance at a 400 V rating in an ultra-smaller-sized snap-in package designed for general-purpose power applications.

Key value comes from its high-voltage capability, 105°C operating range, and series-level endurance specifications that support sustained operation under DC bias plus rated ripple current.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 400 V rated voltage and tolerance of ±20% (measured at 120 Hz, 20°C).
• High-temperature Endurance — Specified operating temperature range of –25°C to +105°C and endurance of 2000 hours at 105°C under DC bias plus rated ripple current; after the test the capacitance remains within ±20%.
• Snap-in Radial Can Package — Snap-in terminal, radial can (snap-in) package with physical size ∅22 × L50 mm (L: 5 × D: 2.2 cm) for secure PCB mounting.
• Ripple Current Performance — Rated ripple current 1.23 A at 120 Hz (1,230 mArms) and higher-frequency capability (1.759 A at 50 kHz); frequency coefficients per the LGL series apply.
• Leakage Current & Loss — Leakage current specification per series: I ≤ 3√(μA) after 5 minutes' application of rated voltage at 20°C; series tan δ max. 0.15 at 400 V (120 Hz, 20°C). The dimension table lists leakage current ~1.18 mA for the 390 µF, 22 × 50 mm variant.
• Low-temperature Stability — Impedance stability characterized by Z(–25°C)/Z(+20°C) ≤ 8 (measurement frequency 120 Hz).
• Polarized — Polarized aluminum electrolytic capacitor for DC applications.

Typical Applications

• High-voltage DC filtering — Bulk smoothing and DC-link filtering where a 400 V rating and 390 µF capacitance provide energy storage and voltage stabilization.
• Power supply decoupling — AC ripple attenuation and transient support in power converters and supplies using snap-in mounting for robust PCB installation.
• General-purpose industrial power systems — Use in general-purpose power electronics that require operation up to 105°C and long-duration endurance under DC bias plus ripple current.

Unique Advantages

• High-voltage, compact form factor — 390 µF at 400 V delivered in a compact ∅22 × 50 mm snap-in can reduces board footprint for high-voltage designs.
• Designed for elevated temperatures — 105°C rating and 2000-hour endurance provide predictable performance in thermally demanding environments.
• Robust ripple handling across frequencies — Rated ripple current at 120 Hz and specified higher-frequency values support a range of switching and line-frequency conditions.
• Reliable low-temperature behavior — Defined impedance ratio at –25°C helps maintain expected performance across the specified temperature range.
• Secure snap-in mounting — Snap-in terminals simplify installation and provide mechanical stability for high-current and high-vibration assemblies.

Why Choose LGL2G391MELZ50?

The LGL2G391MELZ50 is positioned for designers who need a high-voltage aluminum electrolytic capacitor in a compact snap-in package with defined endurance at elevated temperatures. Its combination of 400 V rating, 390 µF capacitance, 105°C operating range and series-level endurance specifications make it suitable for general-purpose power electronics requiring long-term stability under DC bias and ripple current.

As part of Nichicon's LGL series, this part carries series specifications for leakage, tan δ, low-temperature stability and frequency-dependent ripple performance, allowing engineers to specify with clear, verifiable parameters.

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