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HomeProductsCapacitorsAluminum Electrolytic CapacitorsUUE1E681MNS6MS
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UUE1E681MNS6MS - Nichicon

Manufacturer Part Number
UUE1E681MNS6MS
Manufacturer
Nichicon
Allelco Part Number
98D-UUE1E681MNS6MS
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
41,637 pcs available, New & Original
Parts Description
CAP ALUM 680UF 20% 25V SMD
Package
Radial, Can - SMD
Data sheet
UUE1E681MNS6MS.pdf

HTML Datasheet

UUE Series.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 41637
  • Unit Price: $1.072
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Quantity Unit Price Ext. Price
1+ $1.072 $1.07
200+ $0.416 $83.20
500+ $0.401 $200.50
1000+ $0.394 $394.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

UUE1E681MNS6MS Tech Specifications
Nichicon - UUE1E681MNS6MS technical specifications, attributes, parameters and parts with similar specifications to Nichicon - UUE1E681MNS6MS

Product Attribute Attribute Value
Manufacturer Nichicon
Voltage - Rated 25 V
Tolerance ±20%
Surface Mount Land Size 0.673" L x 0.673" W (17.10mm x 17.10mm)
Size / Dimension 0.630" Dia (16.00mm)
Series UUE
Ripple Current @ Low Frequency 804 mA @ 120 Hz
Ripple Current @ High Frequency 1.2 A @ 100 kHz
Ratings -
Polarization Polar
Product Attribute Attribute Value
Package / Case Radial, Can - SMD
Package Tape & Reel (TR)
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount
Lifetime @ Temp. 5000 Hrs @ 125°C
Lead Spacing -
Height - Seated (Max) 0.886" (22.50mm)
ESR (Equivalent Series Resistance) -
Capacitance 680 µF
Applications Automotive

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8532.22.0020

Frequently Asked Questions(FAQ)

What thermal derating should be applied to the UUE1E681MNS6MS when operating above 85°C in automotive applications?
The UUE1E681MNS6MS is rated for 5000 hours at 125°C, establishing the capacitor's thermal life expectancy at maximum operating temperature. In automotive designs, capacitor lifetime degrades exponentially with temperature; a rule of thumb suggests that every 10°C increase above 85°C reduces service life by approximately 50%. At 105°C, the UUE1E681MNS6MS would deliver roughly 20% of its 5000-hour rating. For designs requiring extended service intervals (10+ years), thermal management around the 680 µF 25V module becomes critical. Applications like under-hood power distribution or engine control modules must account for localized heating near switching regulators. The ±20% capacitance tolerance of the UUE1E681MNS6MS also widens at elevated temperature, potentially affecting ripple voltage stability if thermal headroom is not reserved.
How does the ripple current rating of the UUE1E681MNS6MS compare to ceramic or film capacitors in automotive buck converter designs?
The UUE1E681MNS6MS handles 1.2 A ripple current at 100 kHz and 804 mA at 120 Hz, positioning it as a mid-range performer for output filtering in step-down regulators. Ceramic capacitors at equivalent voltage and capacitance often exhibit higher ripple current ratings (2–3 A at 100 kHz) but suffer capacitance collapse under DC bias and temperature variation. Film capacitors provide superior ripple current density but occupy 3–4× more board space than the UUE1E681MNS6MS's 16 mm diameter. In automotive designs with 12V or 48V input rails, the UUE1E681MNS6MS's 25V rating matches buck converter output stages where the ripple current specification is driven by converter switching frequency and output filter inductor design. At 100 kHz switching, a 100 µH inductor with ±50 mA ripple amplitude would stay well within the UUE1E681MNS6MS performance envelope, but higher-frequency designs (400+ kHz) may require paralleling multiple UUE1E681MNS6MS units or transitioning to ceramic alternatives.
Why does the UUE1E681MNS6MS specify ±20% tolerance rather than tighter ±10% in automotive systems where capacitance stability is critical?
The ±20% tolerance on the UUE1E681MNS6MS reflects aluminum electrolytic manufacturing variability and is standard for this device class at high volumetric efficiency. Tighter tolerances (±10% or ±5%) require tighter process control, increasing cost significantly without proportional performance gain in most automotive filtering applications. The UUE1E681MNS6MS's 680 µF target allows designers to select actual values at bin-sorted tiers; if 5% tighter tolerance is needed, pairing two UUE1E681MNS6MS units in parallel reduces the effective tolerance spread while doubling ripple current capability. For feedback control loops (voltage regulators, engine sensors), the ±20% window of the UUE1E681MNS6MS is usually absorbed by feedback compensation rather than causing system instability. However, in analog timing circuits or precision filters, paralleling or active voltage regulation becomes necessary, shifting the UUE1E681MNS6MS from a simple bulk storage role to part of a more complex compensation strategy.
What is the maximum instantaneous inrush current the UUE1E681MNS6MS can withstand during power-on without activation failure?
The UUE1E681MNS6MS datasheet does not explicitly specify an inrush current limit or surge voltage transient rating, which is typical for aluminum electrolytic capacitors. In practice, the device can tolerate brief overcurrent pulses (milliseconds) that exceed rated ripple current by 2–3× because the thermal time constant of the aluminum can is measured in seconds. At power-on, the UUE1E681MNS6MS initially presents near-zero impedance; current is limited by series resistance in the PCB trace and source impedance. Automotive designs using the UUE1E681MNS6MS should employ a soft-start circuit or current-limiting resistor (10–100 mΩ) to prevent voltage sag across the 25V rail and mechanical stress on capacitor terminals. Systems with cold-crank conditions (−40°C engine start) show elevated ESR in the UUE1E681MNS6MS, which naturally limits inrush current but also increases voltage drop. Paralleling multiple UUE1E681MNS6MS units reduces effective series resistance and improves inrush performance.
Is the UUE1E681MNS6MS suitable for direct connection to a 24V automotive load dump transient, or does it require protection?
The UUE1E681MNS6MS is rated for 25V nominal operation and should not be directly exposed to automotive load dump transients, which routinely spike to 40V+ on vehicle buses during alternator disconnection. A single UUE1E681MNS6MS without series protection will experience catastrophic failure (case rupture or electrolyte leakage) within milliseconds at 40V. Automotive designs require a transient suppression approach: placing a Zener diode, TVS diode, or active clamp circuit between the supply rail and the UUE1E681MNS6MS input to limit voltage to 30V or below. Some designs use a varistor (MOV) in series with a resistor, absorbing transient energy while the UUE1E681MNS6MS acts as the bulk filter after the voltage has settled. The UUE1E681MNS6MS can then tolerate the residual overshoot without permanent damage. In redundant or safety-critical circuits, two UUE1E681MNS6MS units in series (with balanced voltage dividers) can be used to share voltage, though this approach reduces total capacitance by half and requires careful design to prevent one unit from reverse-biasing the other.
How does moisture ingress affect the operational lifetime of the UUE1E681MNS6MS in humidity-controlled automotive underbody environments?
The UUE1E681MNS6MS carries MSL (Moisture Sensitivity Level) 1 rating, meaning it has unlimited exposure to ambient humidity without dry-bake requirements prior to reflow. This classification indicates the device's robust aluminum can packaging and electrolyte chemistry are well-sealed against moisture penetration. However, the SMD land interface—0.673" × 0.673" (17.1 mm × 17.1 mm)—is where moisture can ingress via solder joints in cyclic thermal environments. Automotive underbody applications expose the UUE1E681MNS6MS to −40°C to 85°C cycling, causing solder crack initiation over 100+ thermal cycles if PCB surface finish or joint geometry is suboptimal. The electrolyte inside the UUE1E681MNS6MS is primarily ethylene glycol based and highly hygroscopic; moisture that reaches the dielectric (aluminum oxide layer) causes localized shorts and capacitance loss. Best practice involves conformal coating around the UUE1E681MNS6MS solder joints and avoiding flux residue, particularly in salt-spray or high-humidity coastal applications. The 5000-hour, 125°C lifetime rating assumes controlled laboratory conditions; real-world underbody exposure typically reduces effective life to 3000–4000 hours for the UUE1E681MNS6MS unless supplementary potting or encapsulation is applied.
What design trade-offs exist when substituting the UUE1E681MNS6MS with a larger-capacitance unit to extend output filter settling time?
Increasing from the UUE1E681MNS6MS (680 µF, 16 mm diameter) to a 1000 µF or higher device extends RC time constants and reduces output voltage ripple in low-frequency filtering stages. However, larger capacitance units in the Nichicon UUE series occupy proportionally more board space (typically 18–20 mm diameter for 1000+ µF), impacting cost and thermal dissipation around neighboring components. The UUE1E681MNS6MS's 1.2 A ripple current rating is adequate for most automotive buck converter outputs at 100–200 kHz; oversizing capacitance does not improve ripple handling without also upgrading ripple current. A design using the UUE1E681MNS6MS as a single output stage would benefit from paralleling a second identical unit rather than substituting a single larger device, preserving thermal distribution and allowing graceful degradation if one unit fails. The ±20% tolerance on the UUE1E681MNS6MS also becomes a consideration when stacking capacitance; two units in parallel effectively reduce tolerance spread to approximately ±14%, improving overall supply stability. Cost-per-microfarad for the UUE1E681MNS6MS is often lower than larger alternatives, making paralleling economically competitive with single-device substitution.
Does the UUE1E681MNS6MS require end-of-life (EOL) voltage derating or shows open-circuit failure modes in long-term automotive field operation?
Aluminum electrolytic capacitors, including the UUE1E681MNS6MS, do not degrade linearly; they exhibit a characteristic bathtub failure curve. Early failures (0–500 hours) are primarily infant mortality from manufacturing defects; mid-life operation (500–4000 hours) shows stable performance; end-of-life (beyond 5000 hours at 125°C) transitions to rapid capacitance loss and ESR rise. The UUE1E681MNS6MS does not typically exhibit a catastrophic short-circuit failure; instead, it gradually opens or shows severe capacitance drift (−30% to −50% from nominal) as internal corrosion progresses. In automotive applications with 10+ year service requirements, the UUE1E681MNS6MS operating at 70–85°C (typical under-hood temperature) extends effective life to 15,000–20,000 hours, well beyond the stated 5000-hour, 125°C rating. However, circuit designers should not rely on this extrapolation for safety-critical functions; instead, the UUE1E681MNS6MS should be treated as a consumable component with periodic replacement intervals, or redundant capacitor stages should be implemented. Active ESR monitoring or capacitance drift detection in microcontroller-based systems can trigger maintenance alerts before the UUE1E681MNS6MS reaches failure threshold.
How do cold-start conditions (−55°C) affect the UUE1E681MNS6MS's ESR and power delivery in winter automotive engine cranking circuits?
At −55°C, the UUE1E681MNS6MS experiences a dramatic ESR increase—often 3–5× above room-temperature values—due to electrolyte viscosity rising sharply as temperature drops. The aluminum oxide dielectric also exhibits reduced ionic conductivity at cryogenic temperatures, further elevating impedance. For automotive starting circuits drawing 200–500 A during engine cranking, the UUE1E681MNS6MS alone would be inadequate for bulk filtering; instead, it serves as a secondary smoothing stage after primary supercapacitors or film capacitors with better low-temperature ESR characteristics. In battery management systems (BMS) or auxiliary 12V rails, the UUE1E681MNS6MS's elevated cold-start ESR translates to 0.5–1.5 V additional voltage drop across a 100 A transient, potentially causing microcontroller brownout. Heating traces or thermal management around the UUE1E681MNS6MS location is impractical in engine bay applications, so designers typically derate the device's current-handling capability at temperatures below −20°C. The operating temperature range (−55°C to 125°C) is specified for static survival, not active performance; dynamic thermal modeling should account for the UUE1E681MNS6MS's temperature-dependent impedance to avoid under-design of the power distribution network.
What solder joint reliability concerns exist for the UUE1E681MNS6MS given its 22.5 mm height and surface-mount package in vibration-prone automotive environments?
The UUE1E681MNS6MS's 22.5 mm height (0.886") and 16 mm diameter create a tall, relatively narrow mass distribution that presents mechanical shear stress at solder joints during road vibration. Typical automotive vibration profiles (10–500 Hz, 0.5–5 g acceleration) induce cyclical bending moments at the solder pad interface, particularly if PCB flex occurs. The UUE1E681MNS6MS's radial SMD configuration (dual solder pads at opposite sides) experiences uneven stress distribution compared to components with four- or six-pad footprints. Finite element analysis (FEA) of the 17.1 mm × 17.1 mm land size shows stress concentration at pad corners; lead-free solder (Sn/Ag/Cu) exhibits lower fatigue resistance than leaded alternatives, making the UUE1E681MNS6MS vulnerable to crack initiation after 5,000–10,000 thermal and vibration cycles. Mitigation includes adding adhesive dots (epoxy) between the UUE1E681MNS6MS case and PCB, reducing solder joint strain by 40–60%, or designing PCB stiffeners around high-vibration zones. Post-reflow X-ray inspection of UUE1E681MNS6MS assemblies is recommended to detect solder voids or cold joints before field deployment, as early defects will fail rapidly under vibration acceleration.
How should the UUE1E681MNS6MS be paralleled with other capacitor technologies to improve ripple current performance without sacrificing reliability in automotive power stages?
Hybrid capacitor architectures combining the UUE1E681MNS6MS with ceramic or film devices optimize ripple current handling and thermal performance. A common topology uses the UUE1E681MNS6MS (680 µF, 25V) as the primary bulk capacitor in parallel with 2–4 ceramic capacitors (0.1–1 µF, X7R or X5R, 50V) for high-frequency decoupling and 1–2 film capacitors (10–100 µF, 63V) for mid-frequency ripple absorption. This configuration distributes ripple current across technologies with different impedance profiles: the UUE1E681MNS6MS handles low-frequency (50–120 Hz) ripple via its large capacitance; ceramics dominate 100 kHz and above due to low ESR; film capacitors provide stable filtering across 1–50 kHz without capacitance collapse. The UUE1E681MNS6MS's ±20% tolerance becomes less critical when paralleled, as the combined capacitance variance averages to ±5–8%. Thermal stress is also reduced: instead of one UUE1E681MNS6MS dissipating full ripple losses, the burden is shared, extending lifetime. A practical design might parallel two UUE1E681MNS6MS units (1360 µF total) with four 470 µF ceramics and two 47 µF films, providing 2.4 A total ripple current capability at 100 kHz—suitable for 48V to 12V automotive DC-DC converters delivering 50+ A output.
What is the expected capacitance retention of the UUE1E681MNS6MS after shelf storage in sealed automotive component bins for 3–5 years?
Aluminum electrolytic capacitors like the UUE1E681MNS6MS experience capacitance drift during shelf storage, primarily due to reformation of the aluminum oxide dielectric. After 12 months of storage under controlled conditions (25°C, <60% RH), the UUE1E681MNS6MS typically retains 95–98% of nominal capacitance. After 3–5 years, retention drops to 85–95%, depending on temperature fluctuations and humidity spikes in storage environments. Sealed automotive component bins with desiccant maintain relatively stable conditions, preserving the UUE1E681MNS6MS better than exposed warehouse shelving. However, capacitors stored below 10°C show slower drift, while those exposed to elevated temperature (30°C+) during shipment accelerate loss. Before field deployment, especially for safety-critical applications, technicians should verify capacitance on a sample of aged UUE1E681MNS6MS units using bench ESR meters; a reading below 550 µF (−20% from nominal 680 µF) signals excessive drift and warrants bin rejection or re-formation via controlled voltage application for 2–4 hours at rated voltage. The ±20% tolerance on the UUE1E681MNS6MS technically allows operation at 544 µF minimum, but manufacturing spread combined with shelf drift can push borderline units below functional margins in precision filter designs.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nichicon UUE1E681MNS6MS

Product Attribute UUE1E681MNS1MS UUE1E681MNS6ZD UUE1E681MNS1ZD UUE1E331MNS1MS
Part Number UUE1E681MNS1MS UUE1E681MNS6ZD UUE1E681MNS1ZD UUE1E331MNS1MS
Manufacturer Nichicon Nichicon Nichicon Nichicon
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Lead Spacing - - - -
Size / Dimension - - - -
ESR (Equivalent Series Resistance) - - - -
Series - - - -
Tolerance - - - -
Polarization - - - -
Height - Seated (Max) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Ratings - - - -
Capacitance - - - -
Ripple Current @ Low Frequency - - - -
Voltage - Rated - - - -
Lifetime @ Temp. - - - -
Ripple Current @ High Frequency - - - -
Surface Mount Land Size - - - -
Applications - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount

UUE1E681MNS6MS Datasheet PDF

Download UUE1E681MNS6MS pdf datasheets and Nichicon documentation for UUE1E681MNS6MS - Nichicon.

Datasheets
Aluminum Electrolytic Land, Reflow.pdf Chip Type Tape Spec.pdf
HTML Datasheet
UUE Series.pdf

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UUE1E681MNS6MS Image

UUE1E681MNS6MS

Nichicon
98D-UUE1E681MNS6MS

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