LNUN7332MSEHBB

The LNUN7332MSEHBB is a Nichicon LNU-series aluminum electrolytic capacitor in a screw-terminal radial can designed for high-voltage industrial power applications. With a nominal capacitance of 3.3 mF and a rated voltage up to DC 525 V, it is intended for use in inverter circuitry, high-frequency regenerative voltage systems for AC servomotors, and other general inverter or industrial power-supply environments.

Built for sustained high-temperature operation, this capacitor supports a rated operating range of –40°C to +105°C and a specified load life under ripple conditions, delivering robust performance where high-voltage, high-frequency and rapid charge–discharge demands are present.

Key Features

• High Capacitance and Voltage: 3.3 mF (3300 µF) nominal capacitance with a rated voltage up to DC 525 V for high-voltage DC bus and energy-buffering applications.
• Screw Terminal Mounting: Radial can with screw terminals provides a secure, low-impedance connection suited to industrial assemblies and power modules.
• Wide Temperature Range: Specified for –40°C to +105°C operation, enabling use in elevated-temperature power electronics environments.
• High-Temperature Load Life: Endurance specified as 5000 hours at 105°C with applied rated ripple current, supporting prolonged operation under stress.
• Ripple Current Capability: Rated ripple current of 12.1 A at 120 Hz and 16.94 A at 10 kHz, compatible with both low- and high-frequency ripple environments.
• Compact High-Voltage Form Factor: Φ76.2 × 140 mm (L) package (size: L: 14.0 cm × D: 7.62 cm) that provides high-voltage capability in a relatively compact footprint for its class.
• Leakage Current Specification: After 5 minutes at rated voltage, leakage current is ≤ 3√(C·V) µA or 5 mA (whichever is smaller) at 20°C, per datasheet limits.
• Charge–Discharge Endurance: Meets charge–discharge endurance requirements after 50 million cycles (ΔV ≈ rated voltage ±0.3, 3 Hz), suitable for rapid energy cycling applications.
• Dielectric and Safety Characteristics: Insulation resistance >100 MΩ at DC 500 V between terminal and bracket, and voltage proof of AC 2500 V for one minute between terminal and bracket.
• RoHS Compliant: Conforms to RoHS directives (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial Inverters: Energy storage and DC-link smoothing in inverter power supplies where 400–525 V DC systems are used.
• AC Servomotor Drives: Handling high-frequency regenerative voltage and rapid charge–discharge cycles in motor drive circuits.
• Regenerative Power Systems: Absorbing and releasing energy in regenerative braking or power-recovery stages that require high-voltage capacitive buffering.
• High-Frequency Power Electronics: Use in circuits that demand reliable ripple handling at both line frequency and kHz-range switching frequencies.

Unique Advantages

• High-Voltage Capability: Supports up to DC 525 V, enabling use in elevated-voltage DC buses without series stacking.
• Designed for Elevated Temperatures: Rated for continuous operation up to 105°C with a 5000-hour load-life specification under ripple loading.
• Strong Ripple Performance: Explicit ripple current ratings at 120 Hz and 10 kHz allow designers to size capacitors against both low- and high-frequency heating effects.
• Robust Mechanical Connection: Screw-terminal radial can construction provides secure electrical and mechanical mounting for industrial assemblies.
• Durability Under Cycling: Specified endurance for tens of millions of charge–discharge cycles, supporting applications with frequent energy transfer events.
• Regulatory Compliance: RoHS compliance supports deployment in regulated supply chains requiring restricted-substance conformance.

Why Choose LNUN7332MSEHBB?

The LNUN7332MSEHBB combines high capacitance and 525 V voltage capability in a screw-terminal radial can optimized for industrial power electronics. Its 105°C rating and 5000-hour load-life specification under ripple current make it appropriate for inverter circuitry, regenerative drives, and other high-stress applications where sustained thermal and electrical performance is required.

This Nichicon LNU-series capacitor is suited to designs that need a compact high-voltage capacitor with documented ripple current, leakage, insulation and voltage-proof characteristics. It delivers verifiable endurance and charge–discharge behavior for engineers specifying reliable energy-buffering components in industrial systems.

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