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Home > Products > Capacitors > Aluminum Electrolytic Capacitors > EET-UQ2G681KA
Panasonic Electronic Components
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EET-UQ2G681KA

Manufacturer Part Number:
EET-UQ2G681KA
Manufacturer / Brand
Panasonic Electronic Components
Part of Description:
CAP ALUM 680UF 20% 400V SNAP
Datasheets:
EET-UQ2G681KA(1).pdfEET-UQ2G681KA(2).pdfEET-UQ2G681KA(3).pdfEET-UQ2G681KA(4).pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 426411 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number EET-UQ2G681KA
Manufacturer / Brand Panasonic Electronic Components
Stock Quantity 426411 pcs Stock
Category Capacitors > Aluminum Electrolytic Capacitors
Description CAP ALUM 680UF 20% 400V SNAP
Lead Free Status / RoHS Status: RoHS Compliant
Voltage - Rated 400 V
Tolerance ±20%
Surface Mount Land Size -
Size / Dimension 1.181" Dia (30.00mm)
Series TS-UQ
Ripple Current @ Low Frequency 2.96 A @ 120 Hz
Ripple Current @ High Frequency 4.144 A @ 10 kHz
Ratings -
Polarization Polar
Package / Case Radial, Can - Snap-In
Package Bulk
Operating Temperature -25°C ~ 85°C
Mounting Type Through Hole
Lifetime @ Temp. 2000 Hrs @ 85°C
Lead Spacing 0.394" (10.00mm)
Height - Seated (Max) 1.969" (50.00mm)
ESR (Equivalent Series Resistance) 293mOhm @ 120Hz
Capacitance 680 µF
Base Product Number EET-UQ
Applications General Purpose

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

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PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can the EET-UQ2G681KA be used in a 380V DC bus for a Power Factor Correction (PFC) stage given its 400V rating?
While the EET-UQ2G681KA is rated for 400V, using it in a 380V DC bus leaves a voltage margin of only 5%. In high-performance PFC circuits where transient overvoltages or line surges occur, this narrow headroom may lead to dielectric stress. Engineering best practices often suggest a 10-20% derating for aluminum electrolytic capacitors to ensure long-term dielectric stability. If the system incorporates robust active overvoltage protection that strictly clamps the bus below 400V, the EET-UQ2G681KA is a viable choice, but designers should verify that peak surge voltages do not exceed the capacitor's surge voltage limit.
What are the design implications when substituting the EET-UQ2G681KA with the Nichicon LLG2G681MELB45 or CDE 380LQ681M400A452?
When replacing the EET-UQ2G681KA with the LLG2G681MELB45 or 380LQ681M400A452, the primary considerations are physical dimensions and ripple current capability. The EET-UQ2G681KA features a 30mm diameter and 50mm height; any substitute must fit the existing mechanical footprint and height clearance. Furthermore, because the EET-UQ2G681KA provides a ripple current of 4.144A at 10kHz, the replacement part must meet or exceed this value to prevent excessive self-heating. While these substitutes are generally cross-compatible, slight variations in ESR (Equivalent Series Resistance) can alter the thermal profile and efficiency of the power stage.
How does the 2000-hour @ 85°C lifetime rating of the EET-UQ2G681KA translate to actual service life in an industrial environment at 45°C?
The service life of the EET-UQ2G681KA follows the Arrhenius law, where life approximately doubles for every 10°C decrease in operating temperature. Operating the EET-UQ2G681KA at a core temperature of 45°C (assuming minimal self-heating from ripple current) would theoretically extend its operational life to approximately 32,000 hours. However, this calculation is sensitive to internal heat rise caused by the 2.96A ripple current at 120Hz. For 24/7 continuous industrial operations, designers must account for ambient airflow and heat dissipation to ensure the capacitor remains within its thermal limits for the intended product lifecycle.
How should the 10kHz ripple current rating of 4.144A be applied when the EET-UQ2G681KA is used in a multi-frequency switching environment?
In applications like switch-mode power supplies (SMPS), the EET-UQ2G681KA experiences current components at both the 120Hz rectified line frequency and the high-frequency switching frequency (e.g., 20kHz to 100kHz). The total power dissipation is the sum of the squares of the ripple currents multiplied by their respective ESR at those frequencies. Since the EET-UQ2G681KA is rated for 4.144A at 10kHz, it is optimized for filtering high-frequency noise, but designers must ensure the combined RMS current does not exceed the thermal dissipation capability of the 30mm x 50mm can.
Is the EET-UQ2G681KA suitable for outdoor power electronics exposed to temperatures below -25°C?
The EET-UQ2G681KA has a minimum operating temperature limit of -25°C. In outdoor environments where temperatures drop further, the electrolyte within the EET-UQ2G681KA will begin to freeze, leading to a significant increase in ESR and a sharp drop in capacitance. This can cause startup failures or instability in control loops due to increased output ripple. For applications requiring operation in extreme cold, such as -40°C, a capacitor with an extended temperature range or a localized heating element would be required to maintain the electrical characteristics provided by the EET-UQ2G681KA at standard temperatures.
What mechanical considerations are necessary for the 10.00mm lead spacing and snap-in terminals of the EET-UQ2G681KA during PCB layout?
The EET-UQ2G681KA utilizes a standard 10.00mm lead spacing with snap-in terminals designed to hold the component in place during wave soldering. For high-vibration industrial applications, the 30mm diameter and 50mm height of the EET-UQ2G681KA create a high center of gravity. Designers should ensure the PCB hole diameters are precisely matched to the snap-in pin dimensions to provide mechanical tension. In environments with significant mechanical shock, applying non-corrosive RTV silicone or an adhesive bond between the capacitor base and the PCB is a common practice to prevent lead fatigue and solder joint cracking.
How does the 293mOhm ESR of the EET-UQ2G681KA impact the efficiency of a 500W motor drive inverter?
The ESR of the EET-UQ2G681KA contributes to internal power loss (I²R) as ripple current passes through the device. In a 500W motor drive, where the DC bus capacitor handles significant return currents from the inverter stage, a 293mOhm ESR results in measurable heat generation. This heat can lower the overall efficiency of the drive and increase the thermal load on adjacent components. If efficiency targets are tight, designers may consider paralleling multiple EET-UQ2G681KA units to reduce the effective ESR and distribute the ripple current, thereby improving the thermal management and reliability of the inverter system.

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EET-UQ2G681KA

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Panasonic Electronic Components

CAP ALUM 680UF 20% 400V SNAP

In Stock: 426411

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