LGN2H121MELZ45

The LGN2H121MELZ45 is a 120 µF, 500 V polarized aluminum electrolytic capacitor in a snap-in radial can designed for general-purpose power applications. It is part of Nichicon's LGN series and is optimized for high-temperature endurance and compact board-level mounting.

Core attributes include a snap-in terminal package, operation to 105°C, and a lifetime specification that supports continuous application of rated ripple current at elevated temperature, making it suitable for demanding high-voltage circuits requiring reliable bulk capacitance.

Key Features

• Capacitance & Voltage: 120 µF nominal capacitance with a 500 V rated voltage for high-voltage filtering and energy storage within general-purpose circuits.
• High-Temperature Endurance: Rated for operation up to 105°C with a specified lifetime of 3000 hours at 105°C under DC bias plus rated ripple current (endurance criteria: capacitance change within ±20%, tan δ ≤200% of initial, leakage current ≤ initial).
• Snap-in Radial Can Package: Snap-in terminal type in a radial can for secure PCB mounting and easy insertion; one rank smaller case size than the LGU series for reduced board footprint.
• Ripple Current Ratings: Rated ripple current of 680 mA at 120 Hz and 972.4 mA at 100 kHz, supporting continuous AC ripple conditions within the specified limits.
• Thermal and Environmental: Operating temperature range of −25°C to +105°C for the 500 V part; RoHS compliant per 2011/65/EU and (EU)2015/863.
• Tolerance & Polarization: Capacitance tolerance of ±20% and polarized construction—suitable where polarized electrolytic capacitance is required.
• Compact Dimensions: Body size L: 4.5 × D: 2.2 cm with a maximum seated height of 1.772 inch, enabling higher-density layouts compared with larger case options.

Typical Applications

• General-Purpose Power Electronics — Provides bulk capacitance and smoothing in high-voltage power circuits where 120 µF at 500 V and validated ripple endurance are required.
• Industrial Power Supplies — Suited for power supply stages that require components rated for continuous ripple current at elevated temperatures up to 105°C.
• High-Voltage Filter Stages — Used in filter and energy-storage roles in circuits that demand polarized electrolytic capacitance with a compact snap-in package.

Unique Advantages

• Validated High-Temperature Life: 3000-hour endurance at 105°C under rated ripple current ensures predictable long-term performance in hot environments.
• High-Voltage Capability: 500 V rating enables use in higher-voltage rails without stacking multiple lower-voltage capacitors.
• Board-Level Convenience: Snap-in radial can design simplifies PCB mounting and mechanical retention compared to leaded or surface-mounted alternatives.
• Compact Case Size: One rank smaller than LGU-series cases for space-constrained designs needing high-voltage capacitance.
• Measured Ripple Performance: Specified ripple currents at 120 Hz and 100 kHz provide clear design margins for both line-frequency and higher-frequency ripple conditions.
• Regulatory Compliance: RoHS compliant for use in designs requiring restricted substance conformance.

Why Choose LGN2H121MELZ45?

LGN2H121MELZ45 positions itself as a practical high-voltage electrolytic solution for engineers who need 120 µF at 500 V in a compact snap-in package with proven high-temperature endurance. Its combination of rated ripple current, 105°C capability, and one-rank-smaller case size offers a balance of electrical performance and PCB space efficiency for general-purpose power circuitry.

Manufactured as part of Nichicon's LGN series, this capacitor is suitable for designs that require polarized bulk capacitance with defined lifetime and endurance criteria, enabling predictable behavior over long operating periods in demanding thermal conditions.

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