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HomeProductsCapacitorsAluminum Electrolytic CapacitorsUUE1E681MNS6ZD
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UUE1E681MNS6ZD - Nichicon

Manufacturer Part Number
UUE1E681MNS6ZD
Manufacturer
Nichicon
Allelco Part Number
98D-UUE1E681MNS6ZD
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
865,762 pcs available, New & Original
Parts Description
CAP ALUM 680UF 20% 25V SMD
Package
Radial, Can - SMD
Data sheet
UUE1E681MNS6ZD.pdf

PCN Obsolescence/ EOL

Mult Devs 25/Mar/2020.pdf

HTML Datasheet

UUE Series.pdf
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Specifications

UUE1E681MNS6ZD Tech Specifications
Nichicon - UUE1E681MNS6ZD technical specifications, attributes, parameters and parts with similar specifications to Nichicon - UUE1E681MNS6ZD

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 Tray
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount
Lifetime @ Temp. 5000 Hrs @ 105°C
Lead Spacing -
Height - Seated (Max) 0.886" (22.50mm)
ESR (Equivalent Series Resistance) -
Capacitance 680 µF
Applications Automotive

Environmental & Export Classifications

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

Frequently Asked Questions(FAQ)

What are the thermal stress implications of using the UUE1E681MNS6ZD at its maximum operating temperature of 125°C versus the rated 105°C lifetime specification?
The UUE1E681MNS6ZD is rated for a 5000-hour lifetime at 105°C, which establishes the reference condition for accelerated aging calculations. Operating continuously at 125°C significantly accelerates electrolyte evaporation and chemical degradation in the UUE1E681MNS6ZD, typically reducing functional lifetime by 40–60% for each additional 10°C above the rating. At 125°C, a conservative estimate suggests 1500–2000 operating hours before capacitance drops below the ±20% tolerance band. For applications requiring extended service life beyond 5000 hours, thermal management to maintain the UUE1E681MNS6ZD below 85°C is recommended, which can extend usable life to 15,000–20,000 hours.
How does the 804mA ripple current specification at 120Hz for the UUE1E681MNS6ZD translate to real-world AC current handling in switching power supply designs?
The 804mA@120Hz ripple current rating for the UUE1E681MNS6ZD defines the RMS current magnitude at 120Hz that the capacitor can sustain continuously without exceeding internal temperature rise limits. In a typical buck or boost converter operating at 100kHz with 25V output, the ripple current at the output filter stage will be dominated by the switching frequency, not 120Hz. The UUE1E681MNS6ZD rating at 120Hz represents worst-case low-frequency ripple stress (such as from 120Hz line-frequency rectification or interleaved converter phases). When used in high-frequency switchers, the actual RMS current capability is typically higher than the 804mA specification, but verification requires measuring or calculating the harmonic content of ripple current in your specific topology. For safety-critical designs, derate the UUE1E681MNS6ZD to 70–80% of the 804mA rating and verify thermal performance with an IR camera during thermal cycling.
What is the practical difference in reliability between the UUE1E681MNS6ZD with ±20% capacitance tolerance and tighter ±10% alternatives in timing or filtering applications?
The ±20% tolerance of the UUE1E681MNS6ZD means that a single unit may measure anywhere from 544uF to 816uF at room temperature and nominal voltage. In RC timing circuits, this tolerance variation causes timing drift; a phase-locked loop tuning range must accommodate the full spread. In power supply output filtering, the UUE1E681MNS6ZD tolerance directly affects output voltage ripple and transient response: at the lower tolerance extreme (544uF), ripple voltage increases by approximately 46% relative to the nominal 680uF value. For noise-sensitive analog front-ends (audio, precision instrumentation), this ripple variation may exceed acceptable THD or noise floor budgets. Tighter ±10% alternatives cost 15–25% more but eliminate sorting or binning overhead in production. The UUE1E681MNS6ZD is cost-effective for non-critical filtering and bulk storage where DC accuracy matters more than AC ripple uniformity.
Can the UUE1E681MNS6ZD be used as a direct replacement for through-hole 680uF 25V capacitors in retrofit or legacy product updates?
The UUE1E681MNS6ZD is an SMD variant with a case outline of D16×L22.5mm, which is mechanically and electrically incompatible with through-hole radial or axial leads. Direct board-level replacement is not possible without PCB redesign and reflow soldering infrastructure. However, the electrical parameters of the UUE1E681MNS6ZD (680uF, 25V, 804mA ripple current, 5000-hour lifetime at 105°C) match common through-hole designs, making it an electrical equivalent for design migration. When considering retrofit: (1) verify that the UUE1E681MNS6ZD fits within the board's height and footprint constraints (22.5mm height may conflict with component stacking or lid clearance), (2) confirm that your assembly process supports high-temperature reflow (solder peak ~260°C) without damaging adjacent components, and (3) validate that the lower ESR of SMD designs does not cause resonance issues in the power distribution network compared to the original through-hole part.
How does the UUE1E681MNS6ZD perform in -55°C to +125°C temperature cycling, and what are the failure modes to monitor?
The UUE1E681MNS6ZD is rated for operation across -55°C to +125°C, but thermal cycling stress is distinct from steady-state operating limits. Repeated cycling from -55°C to +125°C causes solder joint fatigue and expansion mismatch between the aluminum can and the PCB; after 200–500 thermal cycles, hairline cracks in solder connections can develop, increasing ESR and reducing ripple current capability. The electrolyte in the UUE1E681MNS6ZD also experiences viscosity changes: at -55°C, the electrolyte becomes very viscous, temporarily increasing ESR by 300–500% until the capacitor warms up. This creates inrush current risk during cold-start power-on events. At +125°C, leakage current in the UUE1E681MNS6ZD approximately doubles every 10°C, reaching 5–8x the room-temperature value, which increases quiescent current draw in standby circuits. For aerospace or automotive applications requiring validated thermal cycling performance, request extended test data (AEC-Q200 or equivalent) from the distributor; standard datasheets do not guarantee cycle count or failure mechanisms.
What is the ESR behavior of the UUE1E681MNS6ZD, and why is it important for power delivery and filtering applications?
The datasheet specification for the UUE1E681MNS6ZD does not publish an explicit ESR value, which is typical for general-purpose aluminum electrolytic capacitors. For a 680uF, 25V, D16mm SMD design, typical ESR at 1kHz and 20°C is in the range of 0.15–0.25Ω based on Nichicon's material science practices. This ESR interacts critically with ripple current: the 804mA@120Hz rating implies that internal power dissipation (I²R losses in the UUE1E681MNS6ZD) will be approximately (0.804A)² × 0.20Ω ≈ 129mW, which maintains the capacitor's internal temperature rise within design limits. In low-impedance power rails where multiple capacitors share current, the UUE1E681MNS6ZD's ESR directly determines noise at the switching frequency. If your design requires noise lower than 20mV peak-to-peak on a 25V rail, combine several UUE1E681MNS6ZD units in parallel and verify that total ESR is below 0.05Ω; otherwise, consider low-ESR polymer capacitors for the bulk stage and use the UUE1E681MNS6ZD for secondary filtering.
Is the UUE1E681MNS6ZD suitable for applications that cycle between 0V and full voltage repeatedly, and what are the leakage current risks?
The UUE1E681MNS6ZD is designed for continuous or intermittent operation but not for extreme duty cycling (millisecond-scale charge/discharge). When the UUE1E681MNS6ZD is repeatedly charged and discharged at high frequency (>100Hz), the aluminum oxide dielectric experiences accelerated degradation, causing an increase in leakage current and a gradual shift in the capacitance value. Leakage current in a fresh UUE1E681MNS6ZD at 25V and 20°C is typically 20–40µA; after 1000 hours of high-frequency cycling at elevated temperature, leakage can increase to 100–150µA. For energy harvesting or pulse-mode circuits, the UUE1E681MNS6ZD should be protected with a series Schottky diode to prevent reverse leakage when the input voltage drops below the stored voltage. In standby applications where the UUE1E681MNS6ZD charges once and holds charge, leakage current is negligible for power budgets; however, at 105°C, a single UUE1E681MNS6ZD can discharge a 5V margin-of-safety down to 4V in approximately 8–12 hours if no external load is connected.
How should the UUE1E681MNS6ZD be positioned and soldered to minimize voids, cracking, and thermal stress during assembly?
The UUE1E681MNS6ZD is D16mm in diameter and 22.5mm tall, making it a relatively large SMD component prone to tombstoning and solder voiding if reflow parameters are not controlled. Best practices: (1) use a stainless steel stencil with apertures sized at 90–95% of the pad area to deposit 0.1–0.15mm of solder paste; undersized apertures reduce wetting risks and void formation, (2) during the preheat phase, ramp temperature slowly (1–2°C/s) to allow electrolyte gas expansion and pressure release without mechanical stress, (3) position the UUE1E681MNS6ZD perpendicular to the solder wave direction if using selective solder; avoid placing it parallel to the wave, which causes differential thermal stress between the lead-frame and can, (4) allow at least 48 hours for stress relief after reflow before thermal cycling testing, and (5) inspect for micro-cracks under 10× magnification at the solder fillet interface; any visible discontinuities in the solder joint will increase ESR and reduce the effective ripple current rating of the UUE1E681MNS6ZD.
What is the expected lifetime of the UUE1E681MNS6ZD in a 70°C ambient environment, and how does this compare to the 105°C rated condition?
The UUE1E681MNS6ZD carries a 5000-hour lifetime specification at 105°C. Using the industry-standard Arrhenius model, electrolytic capacitor lifetime approximately doubles for every 10°C reduction in operating temperature. At 70°C (35°C below the rated 105°C condition), the predicted lifetime of the UUE1E681MNS6ZD extends to approximately 40,000–60,000 hours (4.5–7 years continuous operation), assuming the capacitor reaches 70°C internally and ripple current is within specification. However, this calculation assumes no additional stressors: exceeding the 804mA ripple current, operating in a vibration-prone environment, or repeated thermal cycling will reduce this estimate by 30–50%. For consumer electronics with typical 3–5 year expected life, the UUE1E681MNS6ZD at 70°C provides adequate margin. For industrial or telecommunications equipment with 10+ year requirements, perform a detailed thermal model of the UUE1E681MNS6ZD's operating point (internal temperature will be higher than ambient) and apply a 1.5–2.0x safety factor to the Arrhenius calculation.
How does the ±20% tolerance and temperature coefficient of the UUE1E681MNS6ZD affect DC bias characteristics in high-voltage charging circuits?
The UUE1E681MNS6ZD's capacitance changes with applied voltage (DC bias effect) and temperature. At room temperature with no bias voltage, the nominal 680uF value applies. Under 25V DC bias (full rating), the effective capacitance typically decreases by 10–15% due to the aluminum oxide dielectric's non-linear permittivity; the actual value becomes approximately 580–610uF in the UUE1E681MNS6ZD. Combined with the ±20% manufacturing tolerance, a worst-case low unit (544uF nominal × 0.85 bias reduction) could measure as low as 460uF—a 32% shortfall from nominal. In charging circuits where the UUE1E681MNS6ZD is used as the primary energy storage element, this bias-induced capacitance loss directly increases charge time and reduces stored energy by one-third. To compensate, (1) parallel two UUE1E681MNS6ZD units to achieve 1360uF with reduced relative tolerance spread, or (2) select a capacitor with higher nominal value (1000uF) to ensure adequate storage after bias derating. Temperature coefficient is approximately +200–300 ppm/°C; over a 25°C to 125°C range, additional capacitance loss of 4–6% occurs in the UUE1E681MNS6ZD, which must be accounted for in system DC bias calculations.
Can the UUE1E681MNS6ZD be used in reverse-polarity-protected applications, and what precautions are necessary?
The UUE1E681MNS6ZD is a polarized electrolytic capacitor and will fail catastrophically if reverse voltage is applied. Reverse bias causes ionic conduction through the dielectric, generating heat that vaporizes the electrolyte and ruptures the aluminum can within seconds to minutes, depending on the magnitude and duration of reverse voltage. Even brief exposure to reverse voltage (e.g., a few volts for <100ms) can degrade the oxide barrier layer in the UUE1E681MNS6ZD, causing permanent leakage current increase and reduced lifetime. To protect the UUE1E681MNS6ZD in circuits with potential transient reverse voltage: (1) place a Schottky diode in series with the positive terminal (forward bias during normal operation, reverse bias during faults), (2) use a crowbar or transient suppression circuit to clamp the supply voltage, or (3) employ a power entry protection IC that blocks current flow during polarity reversal. If reverse voltage protection is mandatory, consider non-polarized film capacitors instead; however, equivalent film capacitors to the UUE1E681MNS6ZD (680uF at 25V) are physically larger and more expensive, making them unsuitable for space-constrained SMD designs.
How does the UUE1E681MNS6ZD perform in high-frequency applications above 1MHz, and what parasitic effects limit its effectiveness?
The UUE1E681MNS6ZD is rated for ripple current at 120Hz, and its frequency response degrades significantly above 100kHz due to parasitic series inductance and internal resistance. At 1MHz, the effective impedance of the UUE1E681MNS6ZD transitions from primarily capacitive (at audio frequencies) to inductive; series inductance of approximately 0.5–1.0nH per millimeter of lead length adds impedance that rises linearly with frequency, reducing the capacitor's effectiveness as a bypass element. Beyond 500kHz, the UUE1E681MNS6ZD becomes increasingly ineffective for bulk decoupling of high-frequency switching noise. At 10MHz, the capacitive reactance of the UUE1E681MNS6ZD (Xc = 1/(2πfC) ≈ 2.3mΩ) is overshadowed by the parasitic series inductance (X_L ≈ 30mΩ at 1nH), making it act as an inductor rather than a capacitor. For applications requiring decoupling across a wide frequency range (DC to 100MHz), layer ceramic capacitors (0.1µF to 1µF, with sub-nanohenry inductance) in parallel with the UUE1E681MNS6ZD to handle high-frequency noise, and reserve the UUE1E681MNS6ZD for bulk energy storage and low-frequency ripple filtering.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nichicon UUE1E681MNS6ZD

Product Attribute UUE1E681MNS1ZD UUE1E681MNS6MS UUE1E681MNS1MS UUE1E331MNS1ZD
Part Number UUE1E681MNS1ZD UUE1E681MNS6MS UUE1E681MNS1MS UUE1E331MNS1ZD
Manufacturer Nichicon Nichicon Nichicon Nichicon
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Rated - - - -
Capacitance - - - -
Lead Spacing - - - -
Ratings - - - -
ESR (Equivalent Series Resistance) - - - -
Surface Mount Land Size - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Polarization - - - -
Ripple Current @ High Frequency - - - -
Tolerance - - - -
Ripple Current @ Low Frequency - - - -
Size / Dimension - - - -
Lifetime @ Temp. - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Applications - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Height - Seated (Max) - - - -
Series - - - -

UUE1E681MNS6ZD Datasheet PDF

Download UUE1E681MNS6ZD pdf datasheets and Nichicon documentation for UUE1E681MNS6ZD - Nichicon.

Datasheets
Aluminum Electrolytic Land, Reflow.pdf Chip Type Tape Spec.pdf
PCN Obsolescence/ EOL
Mult Devs 25/Mar/2020.pdf
HTML Datasheet
UUE Series.pdf

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UUE1E681MNS6ZD Image

UUE1E681MNS6ZD

Nichicon
98D-UUE1E681MNS6ZD

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