LNUN7681MSEFBN

The LNUN7681MSEFBN is a screw‑terminal aluminum electrolytic capacitor from Nichicon's LNU series designed for high‑voltage industrial power electronics. It combines a 680 µF capacitance with a DC rated voltage of 525 V and is optimized for inverter and regenerative circuits where high voltage, high ripple handling and robust thermal endurance are required.

Engineered for demanding environments, this capacitor supports operation from −40 °C to +105 °C and offers a 5000‑hour load life at 105 °C under rated ripple current, making it suitable for industrial power supplies, inverter circuitry and AC servomotor regenerative applications.

Key Features

• High Voltage Rating — Rated up to DC 525 V for high‑voltage power electronics and inverter circuits.
• Capacitance & Tolerance — 680 µF nominal capacitance with ±20% tolerance (120 Hz, 20 °C) for energy storage and smoothing in DC link applications.
• Wide Temperature Range — Operates from −40 °C to +105 °C, with endurance specified at 105 °C.
• Long Load Life — 5000 hours life at 105 °C under rated ripple current, supporting long‑term reliability in continuous‑duty systems.
• High Ripple Current Capability — Ripple handling of 4.4 A at 120 Hz and 6.16 A at 10 kHz to support both low‑ and high‑frequency switching loads.
• Screw Terminal, Radial Can Package — Robust screw‑terminal mounting for secure electrical and mechanical connection in power assemblies.
• Charge‑Discharge Endurance — Meets specified characteristics after 50 million charge–discharge cycles (3 Hz) under datasheet conditions for designs with rapid cycling.
• Insulation & Voltage Proof — Insulation resistance >100 MΩ at DC 500 V and no abnormality at AC 2500 V for 1 minute between terminal and bracket.
• RoHS Compliant — Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial Inverters — DC link and energy‑storage smoothing for industrial inverter power stages in motor drives and converters.
• AC Servomotor Regeneration — Handling high‑frequency regenerative voltages in servo drives and regenerative braking systems.
• High‑Frequency Switching Supplies — Bulk decoupling and ripple management for high‑speed charge/discharge and switching power supplies.
• Power Supply Filter — Filtering and energy buffering in industrial power supplies and DC bus applications.

Unique Advantages

• High‑Voltage Capability: Rated to 525 V DC to meet demanding DC bus and inverter voltage requirements.
• Designed for High‑Temperature Operation: 5000 hours at 105 °C under rated ripple current supports sustained operation in hot industrial enclosures.
• Strong Ripple Performance: Specified ripple currents at both 120 Hz and 10 kHz enable use across a range of switching frequencies.
• Secure Screw‑Terminal Connection: Screw terminals and radial can packaging provide reliable electrical and mechanical attachment in power modules.
• Durable Cycling Endurance: Validated for 50 million charge–discharge cycles (3 Hz) to handle repeated rapid energy transfers.
• Compact High‑Voltage Option: Marketed as smaller sized than the LNT series, offering a space‑efficient solution for high‑voltage designs.

Why Choose LNUN7681MSEFBN?

The LNUN7681MSEFBN delivers a balanced combination of high voltage, thermal endurance and ripple capability for industrial power electronics. As part of Nichicon's LNU series, it is targeted at inverter, servo and regenerative applications that demand robust DC link performance and reliable long‑term operation at elevated temperatures.

This capacitor is well suited to engineers designing industrial inverters, servo drives and high‑frequency power supplies who need a high‑voltage, screw‑terminal aluminum electrolytic with proven endurance characteristics and RoHS compliance.

If you would like a quote or additional purchasing information for LNUN7681MSEFBN, submit a request or contact the sales team to discuss availability, lead times and volume pricing.