LGR2G181MELA45

The LGR2G181MELA45 is an aluminum electrolytic capacitor in a snap-in terminal, radial can package designed for long-life high-voltage applications. It delivers 180 µF capacitance at a 400 V rating with a long-life assurance of 10,000 hours at 105°C under rated ripple conditions, and is RoHS compliant.

Engineered for general-purpose use where high voltage, elevated temperature endurance and reliable ripple handling are required, this Nichicon LGR series device targets designs that demand predictable end-of-life characteristics and stable performance over extended operating periods.

Key Features

• Capacitance & Voltage — 180 µF nominal capacitance with a 400 V rated voltage; capacitance tolerance ±20% (120 Hz, 20°C).
• Long-Life High-Temperature Endurance — Rated for 10,000 hours at 105°C with DC bias plus rated ripple current applied; endurance limits specify capacitance change within ±25% and leakage current within initial limits after test.
• Snap-In Radial Can Package — Snap-in terminal type and radial can package support secure PCB mounting for power assemblies.
• Ripple Current Performance — 900 mA at 120 Hz and 1.287 A at 50 kHz (specified values) for robust AC ripple handling in high-voltage circuits.
• Operating Temperature Range & Low-Temperature Stability — Specified operating range −25°C to +105°C; impedance ratio Z(−25°C)/Z(+20°C) ≤ 8 for 400/450 V ratings.
• Electrical Loss & Leakage Characteristics — Tangent of loss angle (tan δ) max 0.15 for 200–400 V, and leakage current defined as I ≤ 3√(C·V) µA after 5 minutes at 20°C.
• Marking & Compliance — White printing on a black sleeve; compliant with RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• General-purpose power filtering — Suitable for smoothing and filtering duties in higher-voltage circuits requiring long-term stability at elevated temperatures.
• High-voltage bulk energy storage — 180 µF at 400 V provides bulk capacitance for energy hold-up in high-voltage supplies and converters.
• High-ripple environments — Designed to withstand rated ripple current (specified at both low and high frequencies), supporting reliable operation in circuits with significant AC ripple components.

Unique Advantages

• Proven long-life specification: 10,000 hours at 105°C under rated ripple current gives designers measurable endurance parameters for lifetime planning.
• High-voltage capability: 400 V rating enables use in elevated-voltage power systems without series stacking.
• Documented ripple performance: Explicit ripple current ratings at 120 Hz and 50 kHz support selection for both mains-frequency and higher-frequency power stages.
• Controlled electrical behavior: Leakage current and tan δ limits are specified with JIS-based test conditions, aiding predictable circuit behavior and margin calculations.
• RoHS compliant: Meets EU RoHS directives for material compliance and environmental considerations.
• Secure snap-in mounting: Radial snap-in terminal package simplifies assembly and mechanical retention on PCBs used in power electronics.

Why Choose LGR2G181MELA45?

The LGR2G181MELA45 provides a balanced combination of high-voltage capability, substantial capacitance, and long-term thermal endurance from a reputable manufacturer (Nichicon). Its detailed endurance, leakage, and ripple specifications allow engineers to design with clear, verifiable limits for lifetime, stability, and ripple handling.

This part is well-suited for designers and procurement teams targeting general-purpose high-voltage power designs that require predictable aging and performance at elevated temperatures. Its RoHS compliance and documented electrical characteristics support long-term deployment and regulatory considerations.

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