LAK2G121MELZ40

The LAK2G121MELZ40 is a Nichicon LAK series aluminum electrolytic capacitor in a snap‑in radial can package. It provides 120 µF capacitance at a 400 V rating and is designed for general‑purpose power electronics where voltage fluctuates.

Key value propositions include high ripple endurance at elevated temperature, an extended voltage range across the LAK series, and built‑in safety features for abnormal overvoltage conditions, together with RoHS compliance.

Key Features

• Capacitance & Voltage — 120 µF rated capacitance at 400 V DC with a tolerance of ±20% (‑20% to +20%).
• Snap‑in Radial Can Package — Snap‑in terminal mounting in a radial, can‑style package with physical dimensions approximately 22 mm diameter × 40 mm length.
• High‑Temperature Endurance — Withstands 2000 hours application of rated ripple current at 105°C (endurance tested with DC bias plus rated ripple current; peak voltage shall not exceed rated voltage).
• Ripple Current Ratings — Rated ripple handling of 600 mA at 120 Hz and 690 mA at 10 kHz for effective AC current handling in power circuits.
• Leakage Current Specification — Initial leakage after 5 minutes’ application of rated voltage at 20°C is specified by I ≤ 3√(C·V) µA (C = µF, V = V) per datasheet formula.
• Electrical Loss Characteristics — Tangent of loss angle (tan δ) ≤ 0.20 at 120 Hz, 20°C.
• Operating Temperature Range — Rated for operation from ‑25°C to +105°C.
• Safety Design — Pressure‑relief vent and improved safety measures to manage abnormally excessive voltage without dangerous ignition or dispersion of parts.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power supply filtering and DC bus smoothing — Provides bulk capacitance and ripple filtering in general‑purpose power electronics where voltage fluctuation is common.
• Industrial power equipment — Suited for equipment used in environments with variable line voltage thanks to enhanced safety features and extended voltage options in the LAK series.
• Energy storage in power circuits — Used for short‑term energy buffering and decoupling in inverter front ends and other power conversion stages.

Unique Advantages

• Long high‑temperature life: 2000 hours endurance at 105°C under rated ripple conditions helps ensure stable performance in demanding thermal environments.
• Robust ripple capability: Specified ripple currents at both 120 Hz and 10 kHz support use across a range of switching and line‑frequency power topologies.
• Built‑in overvoltage safety: Pressure‑relief vent and improved abnormal‑voltage protection reduce the risk of hazardous failure modes under excessive voltage conditions.
• Clear leakage specification: Leakage current defined by I ≤ 3√(C·V) µA provides a verifiable acceptance criterion for production and incoming inspection.
• Compact snap‑in form factor: Radial snap‑in package offers secure mechanical mounting for higher‑current and chassis‑mounted power applications.
• Regulatory compliance: RoHS conformity (2011/65/EU, (EU)2015/863) supports use in regions requiring restricted substance compliance.

Why Choose LAK2G121MELZ40?

The LAK2G121MELZ40 combines a high 400 V rating and 120 µF capacitance with a snap‑in, chassis‑mountable form factor, making it a practical choice for general‑purpose power electronics that demand reliable ripple endurance and safety under fluctuating voltages. Its 2000‑hour endurance at 105°C and clearly specified electrical limits provide designers with measurable performance expectations for long‑term deployment.

This capacitor is suitable for engineers specifying robust electrolytic bulk capacitance in industrial and power conversion designs where RoHS compliance and proven safety vent behavior are required.

Request a quote or submit a supply inquiry to receive pricing, availability, and lead‑time information for the LAK2G121MELZ40. Our team can provide further technical details and support to integrate this capacitor into your design.