LQR2G681MSEC

The LQR2G681MSEC is a screw‑terminal aluminum electrolytic capacitor from Nichicon's LQR series, specified at 680 µF and 400 V with a rated operating temperature up to 85°C. It is engineered for high‑speed charge/discharge and high‑frequency regenerative voltage environments, offering a compact radial can package with screw terminals for robust electrical and mechanical connections.

Typical applications include inverter and motor‑drive systems where voltage fluctuates or regenerative events occur; the part combines high voltage capability, defined ripple handling, and endurance characteristics suited to industrial power electronics.

Key Features

• Rated values: 680 µF capacitance at 400 V nominal with ±20% tolerance (at 120 Hz, 20°C).
• Screw‑terminal mounting: Radial can with screw terminals for secure, high‑current connections and straightforward installation in power assemblies.
• High‑speed charge/discharge: Designed for rapid charge/discharge cycles and high‑frequency regenerative voltage applications.
• Ripple current capability: Specified ripple current of 3.2 A at 120 Hz and 4.48 A at 10 kHz to support AC inverter and motor drive ripple conditions.
• Temperature and endurance: Rated for operation from −25°C to +85°C with an endurance of 5000 hours at 85°C under rated DC bias plus rated ripple current.
• Charge‑discharge endurance: Qualified for charge‑discharge behavior up to 20 million cycles (ΔV = rated voltage × 0.3, cycle 3 Hz) with maintained electrical characteristics.
• Leakage current control: Leakage current complies with the series specification after 5 minutes' application of rated voltage at 20°C.
• Physical dimensions: Compact footprint with overall dimensions approximately L: 8 cm × D: 3.5 cm and a maximum seated height of 3.15 inches for system planning.
• RoHS compliant: Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor drives: Handles high‑frequency regenerative voltages encountered during dynamic braking and bidirectional motor control.
• General inverters: Provides energy buffering and ripple smoothing in inverter DC link and power stage circuits.
• Voltage‑doubler rectifiers: Suited for rectifier circuits where fluctuating input and charge‑discharge stress are present.
• Industrial equipment in fluctuating environments: Designed for systems exposed to voltage variations that require robust capacitance and endurance.

Unique Advantages

• Engineered for regenerative loads: High‑speed charge/discharge design and defined ripple current ratings support regenerative events in motor and inverter systems.
• Proven endurance at elevated temperature: 5000‑hour endurance at 85°C under rated conditions provides predictable long‑term behavior in industrial thermal environments.
• Screw‑terminal reliability: Screw terminals enable secure mechanical fastening and low‑impedance connections for high‑current DC link applications.
• Cycle durability: Validated for 20 million charge/discharge cycles at prescribed test conditions, maintaining capacitance, dissipation factor, and leakage requirements.
• Compact power‑stage fit: Small radial can dimensions simplify integration into inverter and power conversion modules where PCB or bracket space is constrained.
• Regulatory compliance: RoHS conformity supports deployment in regions requiring hazardous‑substance restrictions.

Why Choose LQR2G681MSEC?

The LQR2G681MSEC positions itself as a practical, specification‑driven capacitor for industrial power electronics that demand reliable high‑voltage energy storage with strong charge/discharge and ripple handling characteristics. Its screw‑terminal form factor, defined endurance at 85°C, and explicit ripple current ratings make it a fit for inverter, motor drive, and rectifier designs subjected to regenerative or fluctuating voltage conditions.

Manufactured by Nichicon and built on the LQR series specification set, this part is suited to engineers and procurement teams seeking a durable, field‑proven electrolytic solution with clear electrical and mechanical parameters for system design and long‑term operation.

If you would like pricing, availability, or a formal quotation for LQR2G681MSEC, please request a quote or contact sales to submit your requirements.