LAR2G121MELZ30

The LAR2G121MELZ30 from Nichicon is an aluminum electrolytic, snap-in terminal capacitor designed for high-voltage power applications. It delivers 120 µF capacitance at a 400 V rating in a compact radial can with snap-in mounting, and is intended for general-purpose power electronics where high ripple handling and long-term endurance at elevated temperature are required.

Key value propositions include high rated voltage, substantial ripple current capability across low and high frequencies, 2000 hours endurance at 105°C, and RoHS compliance—making it suitable for industrial and power-conversion environments.

Key Features

• Capacitance & Tolerance — 120 µF nominal capacitance with ±20% tolerance (120 Hz, 20°C) for predictable decoupling and energy storage.
• High Rated Voltage — 400 V rating suitable for medium- to high-voltage power rails and bus filtering in power conversion circuits.
• Temperature & Endurance — Rated for operation from −25°C to 105°C with 2000 hours endurance at 105°C when subjected to rated ripple current, supporting sustained high-temperature operation.
• Ripple Current Performance — 730 mA at 120 Hz (low frequency) and 1.044 A at 50 kHz (high frequency) to support heavy AC ripple conditions in power supplies and inverters.
• Dielectric Loss — Tan δ (loss tangent) ≤ 0.15 at 20°C, 120 Hz, providing controlled dissipation factor for stable performance.
• Leakage Current — 650 µA specified leakage current after voltage application, enabling predictable standby and bias characteristics.
• Package & Mounting — Radial can, snap-in terminal type with approximately 22 mm diameter and 30 mm length (size L: 3 × D: 2.2 cm); supplied in tray packing for production assembly.
• Safety & Overvoltage Behavior — Series design reduces incidence of shorting under overvoltage (rated ×1.5) conditions and includes features to limit unsafe failure modes.
• Regulatory — RoHS compliant.

Typical Applications

• Industrial Power Supplies — Bulk energy storage and input/output filtering on 400 V rails where high ripple current capability and 105°C endurance extend service life.
• Inverters & Motor Drives — DC bus smoothing and ripple mitigation in medium-voltage inverter modules requiring robust high-voltage capacitors.
• UPS and Power Conversion — Energy buffering and decoupling in uninterruptible power supplies and standalone converters exposed to sustained ripple and elevated temperatures.
• General Purpose Power Electronics — Applications needing compact 400 V capacitors with snap-in mounting for secure board assembly and reliable long-term operation.

Unique Advantages

• High-voltage support: 400 V rating enables use on elevated DC buses without multiple series capacitance arrangements.
• Long high-temperature life: 2000 hours endurance at 105°C under rated ripple current reduces maintenance and replacement frequency in hot environments.
• Wide ripple-frequency capability: Specified ripple current at both 120 Hz and 50 kHz makes the part suitable for low- and high-frequency converter topologies.
• Snap-in radial package: Robust mechanical retention for high-vibration assemblies and efficient through-hole mounting in production.
• Predictable electrical behavior: Defined tan δ and leakage current values support accurate thermal and leakage budgeting in design validation.
• Production-ready packaging: Tray packing and mass-production status simplify procurement and assembly planning.

Why Choose LAR2G121MELZ30?

The LAR2G121MELZ30 positions itself as a reliable, high-voltage aluminum electrolytic solution from Nichicon for designers needing durable capacitors in power electronics. Its combination of 400 V rating, 120 µF capacitance, strong ripple-current handling across frequency, and 2000-hour endurance at 105°C make it well suited for industrial power supplies, inverters, and other applications with continuous thermal and electrical stress.

Choosing this part supports designs that require predictable loss tangent and leakage characteristics, snap-in mechanical retention for robust assembly, and RoHS-compliant components for production deployments.

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