LAKW6121MELB30ZB

The LAKW6121MELB30ZB is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LAK series, offering 120 µF capacitance at a 420 V rating. Engineered for general‑purpose power applications, it combines high voltage capability with elevated temperature endurance for use in equipment exposed to fluctuating voltages.

Key electrical characteristics include a permissible operating temperature up to 105°C, ±20% capacitance tolerance, low loss (tan δ ≤ 0.20 at 20°C, 120 Hz), and verified ripple handling at both low and high frequencies. The part is RoHS compliant and available in tray packing for production use.

Key Features

• High Voltage Rating — Rated for 420 V, suitable for circuits requiring elevated DC voltage handling within the LAK series voltage range.
• Snap‑in Can Package — Radial, can type with snap‑in terminals designed for secure board mounting and robust mechanical retention.
• High Temperature Endurance — Specified for operation from −25°C to +105°C with a life specification of 2000 hours at 105°C under rated ripple conditions.
• Ripple Current Performance — Low frequency ripple current of 750 mA at 120 Hz and high frequency ripple current of 862.5 mA at 10 kHz to support smoothing and filtering duties under varying conditions.
• Controlled Loss and Leakage — Tangent of loss angle (tan δ) of 0.20 max (20°C, 120 Hz) and measured leakage current of 670 µA, enabling predictable ESR and leakage behavior in designs.
• Safety and Robustness — LAK series includes improved safety features for abnormal voltage and a pressure relief vent designed to operate without flame or dispersion under fault conditions.
• Form Factor — Size φ30 × 30L (3 × 3 cm) provides a compact, high‑voltage electrolytic solution for power assemblies.
• Environmental Compliance — RoHS compliant to support regulatory requirements.

Typical Applications

• Voltage‑fluctuating Power Equipment — Well suited for equipment operating in environments with variable supply voltages, where the LAK series’ abnormal‑voltage safety features are beneficial.
• Power Supply Filtering — Used for bulk smoothing and ripple attenuation in high‑voltage DC power supplies that require 420 V rated components.
• Industrial Electronics — Applicable in general‑purpose industrial systems requiring high‑temperature endurance and reliable ripple performance.

Unique Advantages

• High Voltage Capability: 420 V rating enables use in higher‑voltage DC circuits without upgrading to larger or multiple capacitors.
• Elevated Temperature Reliability: 2000‑hour endurance at 105°C provides predictable lifetime performance in hot operating environments.
• Dual‑frequency Ripple Handling: Specified ripple currents at 120 Hz and 10 kHz allow designers to account for both mains‑frequency smoothing and higher‑frequency switching noise.
• Safety‑focused Design: Series‑level pressure relief and improved abnormal‑voltage features reduce risk in voltage‑fluctuating applications.
• Compact Snap‑in Form Factor: φ30 × 30L can with snap‑in terminals simplifies board assembly while delivering necessary capacitance and voltage rating.
• Regulatory Compliance: RoHS compliance supports environmental and end‑product requirements.

Why Choose LAKW6121MELB30ZB?

The LAKW6121MELB30ZB positions itself as a dependable, high‑voltage electrolytic capacitor for designers needing robust ripple performance and extended life at elevated temperatures. Its snap‑in can package and safety‑oriented LAK series features make it appropriate for general‑purpose power and industrial applications where voltage fluctuations and thermal stress are concerns.

This part suits engineering teams seeking a proven, production‑ready capacitor with verifiable specifications for capacitance (120 µF), voltage (420 V), temperature tolerance (−25°C to +105°C), and lifecycle endurance (2000 hours at 105°C). It provides long‑term value through predictable electrical characteristics and series‑level safety design.

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