LGUW6121MELZ

The LGUW6121MELZ is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LGU series designed for general‑purpose power applications. It provides 120 µF nominal capacitance at a 420 V rated voltage in a radial, snap‑in can package and is polarized for DC applications.

Engineered for elevated temperature endurance, this part withstands 3000 hours of rated ripple current at 105°C and is RoHS compliant, making it suitable where long operating life and regulatory compliance are required.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 420 V rated voltage and ±20% tolerance, offering high‑voltage smoothing and energy storage in a compact snap‑in package.
• High‑temperature Endurance — Endurance specified as 3000 hours at 105°C with rated DC bias plus rated ripple current; capacitance and leakage meet datasheet end‑of‑life criteria after test.
• Ripple Current Performance — Rated ripple current of 750 mA at 120 Hz and 1.073 A at 100 kHz, supporting both low‑ and high‑frequency ripple handling requirements.
• Loss and Leakage Characteristics — Tangent of loss angle (tan δ) specified up to 0.15 at 120 Hz for rated voltages from 160 to 420 V; leakage current limited by I ≤ 3·C·V (µA) after 5 minutes at 20°C.
• Package & Mounting — Radial can, snap‑in terminal type for secure PCB mounting and straightforward installation; physical footprint: L: 3.5 × D: 2.2 cm.
• Operating Temperature Range — Rated for −25°C to +105°C for the 315–450 V range, matching the 420 V rating for high‑temperature operation.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• General‑purpose power filtering — Provides bulk capacitance and ripple smoothing in DC link and power supply circuits requiring 420 V rated components.
• Industrial power equipment — Suited for equipment that requires high‑voltage polarized capacitors with extended 105°C endurance.
• High‑frequency ripple management — Capable of handling specified ripple at both 120 Hz and high frequencies (100 kHz) for mixed‑frequency power stages.

Unique Advantages

• Extended high‑temperature life: 3000 hours at 105°C under rated ripple current provides predictable lifetime behavior in elevated temperature environments.
• High voltage capability: 420 V rating delivers a compact solution for higher‑voltage DC systems without compromising capacitance.
• Measurable ripple handling: Published ripple current values at 120 Hz and 100 kHz allow designers to size capacitors against real ripple loads.
• Low loss at rated voltage: tan δ ≤ 0.15 at 120 Hz (for 160–420 V) supports efficient energy storage with controlled dissipation.
• RoHS compliant: Meets current RoHS requirements for use in regulated markets.
• Practical snap‑in mounting: Radial snap‑in terminal simplifies PCB retention and mechanical stability for through‑hole assemblies.

Why Choose LGUW6121MELZ?

LGUW6121MELZ is positioned for engineers who need a high‑voltage, snap‑in aluminum electrolytic capacitor with documented high‑temperature endurance and defined ripple performance. Its combination of 120 µF at 420 V, long 105°C lifetime data, and explicit ripple current ratings make it a verifiable choice for designs that require dependable energy storage and smoothing under sustained thermal stress.

This part is well suited to designers and procurement teams seeking a RoHS‑compliant, polarized snap‑in capacitor backed by Nichicon’s LGU series specifications and test data for long‑term reliability and predictable electrical behavior.

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