LGR2G121MELZ40

The LGR2G121MELZ40 from Nichicon is a snap-in terminal aluminum electrolytic capacitor in the LGR long-life series. It provides 120 µF capacitance at a 400 V rating and is designed for general-purpose use in high-voltage power circuits.

Engineered for durability, this snap-in radial can is specified for operation from −25 °C to +105 °C and carries a 10,000-hour endurance rating at 105 °C under D.C. bias plus rated ripple current. The part is RoHS compliant.

Key Features

• High Voltage Rating — Rated for 400 V operation, suitable for high-voltage DC bus and power supply applications.
• Capacitance and Tolerance — 120 µF with ±20% tolerance (measured at 120 Hz, 20 °C), providing stable bulk capacitance for smoothing and energy storage.
• Long-Life Endurance — Long Life series specification: withstands 10,000 hours at 105 °C with D.C. bias plus rated ripple current. Endurance limits include capacitance change within ±25%, tan δ ≤ 250% of initial specified value, and leakage current ≤ initial specified value after the test.
• Temperature Range — Rated operating temperature from −25 °C to +105 °C, enabling use in elevated-temperature power environments.
• Ripple Current Performance — Rated ripple current of 750 mA at 120 Hz (low frequency) and 1.073 A at 50 kHz (high frequency). Frequency coefficient for 400/450 V parts: 50 Hz = 0.77, 60 Hz = 0.82, 120 Hz = 1.00, 300 Hz = 1.16, 1 kHz = 1.30, 10 kHz = 1.41, ≥50 kHz = 1.43.
• Package and Mounting — Radial, snap-in can package with snap-in terminals for secure board mounting; polarized design for correct DC installation. Physical size: L: 4 × D: 2.2 cm; maximum seated height 1.575 inch.
• Regulatory Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power Supply Filtering — Smoothing and ripple suppression in high-voltage switch-mode and linear power supplies, leveraging the 400 V rating and high ripple capability.
• DC Bus / Energy Storage — Bulk capacitance for DC link circuits and energy buffering where long-term endurance at elevated temperature is required.
• Industrial Power Electronics — Filtering and decoupling in general-purpose industrial converters and power control systems that operate at elevated temperatures.
• UPS and SMPS Systems — Bulk smoothing and transient energy support in uninterruptible power supplies and high-voltage SMPS architectures.

Unique Advantages

• Long-life assurance: 10,000-hour endurance at 105 °C under rated ripple conditions—supports reliability targets for extended duty applications.
• High-voltage capability: 400 V rating addresses higher-voltage DC bus requirements without series stacking.
• Defined ripple performance: Published ripple current values and frequency coefficients allow predictable thermal and lifetime planning across a wide frequency range.
• Secure snap-in mounting: Radial snap-in terminals provide robust board retention and mechanical stability for power assemblies.
• RoHS compliant: Meets RoHS requirements for environmentally regulated product builds.

Why Choose LGR2G121MELZ40?

LGR2G121MELZ40 is positioned for designers who need a robust, long-life aluminum electrolytic capacitor for high-voltage, high-temperature power electronics. Its combination of 400 V rating, 120 µF capacitance, and documented ripple-frequency behavior makes it suitable for DC bus smoothing, energy buffering, and industrial power applications where endurance and predictable performance matter.

Manufactured by Nichicon and backed by datasheet-specified endurance and frequency coefficients, this part delivers verifiable electrical and thermal characteristics that simplify selection and system-level lifetime planning.

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