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HomeProductsCapacitorsAluminum Electrolytic CapacitorsUUE1E681MNS1ZD
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UUE1E681MNS1ZD - Nichicon

Manufacturer Part Number
UUE1E681MNS1ZD
Manufacturer
Nichicon
Allelco Part Number
98D-UUE1E681MNS1ZD
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
820,984 pcs available, New & Original
Parts Description
CAP ALUM 680UF 20% 25V SMD
Package
Radial, Can - SMD
Data sheet
UUE1E681MNS1ZD.pdf

PCN Obsolescence/ EOL

Mult Devs 25/Mar/2020.pdf

HTML Datasheet

UUE Series.pdf
RoHs Status
 
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Specifications

UUE1E681MNS1ZD Tech Specifications
Nichicon - UUE1E681MNS1ZD technical specifications, attributes, parameters and parts with similar specifications to Nichicon - UUE1E681MNS1ZD

Product Attribute Attribute Value
Manufacturer Nichicon
Voltage - Rated 25 V
Tolerance ±20%
Surface Mount Land Size 0.752" L x 0.752" W (19.10mm x 19.10mm)
Size / Dimension 0.709" Dia (18.00mm)
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) 0.689" (17.50mm)
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 ripple current specification should I verify for the UUE1E681MNS1ZD in switching power supply applications?
The UUE1E681MNS1ZD is rated for 804mA ripple current at 120Hz, which represents the AC current amplitude the capacitor can safely dissipate without exceeding temperature limits. In buck converter or boost converter designs operating at switching frequencies between 100–200kHz, you'll typically need to derate this 120Hz specification using manufacturer-provided frequency derating curves, as ripple current handling decreases significantly above 1kHz. For a 25V input rail experiencing 500mA peak ripple at 80kHz, the UUE1E681MNS1ZD would require parallel capacitors or selection of a higher-rated device.
How does the 5000-hour lifetime rating at 105°C affect reliability calculations for the UUE1E681MNS1ZD in consumer versus industrial designs?
The UUE1E681MNS1ZD specifies 5000 hours at 105°C, which defines the L5 lifetime under worst-case temperature stress. Using industry standard accelerated life modeling, capacitor lifetime roughly doubles for every 10°C reduction in operating temperature. If your design maintains the UUE1E681MNS1ZD at 85°C under normal conditions, you can reasonably project 15,000–20,000 operating hours before the capacitance drops to 80% of nominal. For consumer products with 3–5 year lifecycles, this provides adequate margin; industrial applications demanding 10+ year service lives typically require either derating below 65°C or implementing redundant capacitor banks alongside the UUE1E681MNS1ZD.
Can the UUE1E681MNS1ZD be reliably used across the full −55°C to +125°C operating temperature range without performance degradation?
While the UUE1E681MNS1ZD datasheet permits operation from −55°C to +125°C, practical performance varies significantly across this range. At −55°C, the aluminum electrolyte becomes viscous, increasing equivalent series resistance (ESR) by 300–500% and reducing ripple current handling to approximately 30% of the 120Hz rated value. At +125°C, capacitance drops by roughly 15–20% and ESR increases, accelerating aging. Real-world designs typically operate the UUE1E681MNS1ZD between −10°C and +85°C for consumer applications or −20°C to +70°C for industrial environments, reserving the extreme temperature endpoints for transient conditions or backup supply roles.
How does the ±20% capacitance tolerance of the UUE1E681MNS1ZD impact DC-DC converter feedback loop stability?
The ±20% tolerance on the UUE1E681MNS1ZD means your output capacitance could be 544µF (−20%) or 816µF (+20%) from the nominal 680µF value. In converter topologies where output voltage stability depends on capacitive filtering and feedback loop compensation, this spread directly affects loop crossover frequency and phase margin. A converter designed assuming exactly 680µF with the UUE1E681MNS1ZD may exhibit marginal stability or excessive overshoot if a low-tolerance unit (544µF) is installed. To maintain 5–10% voltage regulation accuracy and stable loop behavior, either select capacitors with ±10% tolerance alongside the UUE1E681MNS1ZD, or design the feedback compensation network to accommodate the full tolerance band by using active ESR emulation or wider compensation margins.
Why might the UUE1E681MNS1ZD be preferred over ceramic capacitors in low-frequency filtering stages despite higher ESR?
Ceramic capacitors (X7R or X5R) typically exhibit lower ESR than the UUE1E681MNS1ZD but suffer severe capacitance derating under DC bias, temperature, and AC ripple stress—often losing 50–70% of nominal value in real conditions. The UUE1E681MNS1ZD's 680µF aluminum electrolytic construction delivers stable capacitance across the specified operating window and provides predictable, aging-related performance. For 25V rails requiring 500–1000µF effective bulk capacitance, using the UUE1E681MNS1ZD with appropriate ESR awareness and thermal management is more reliable than attempting to parallel multiple ceramic units to achieve equivalent capacitance stability. Aluminum electrolytics like the UUE1E681MNS1ZD also offer superior ripple current absorption (804mA@120Hz) compared to ceramic arrays of equivalent physical size.
What thermal management considerations apply when mounting the UUE1E681MNS1ZD on high-density boards with limited airflow?
The UUE1E681MNS1ZD dissipates power proportional to ESR × I_ripple². In confined thermal environments where board surface temperature exceeds 65°C, junction temperature within the UUE1E681MNS1ZD will approach or exceed 85–95°C even at modest ripple currents (400–500mA). This accelerates electrolyte evaporation and reduces the 5000-hour lifetime specification dramatically. For space-constrained designs, consider routing the UUE1E681MNS1ZD away from high-heat components (voltage regulators, power stages) and toward lower-temperature zones. If thermal isolation isn't possible, implement thermal pads or copper planes under the capacitor can and ensure at least 5–10mm spacing from heat sources, or accept a corresponding reduction in operational lifetime and increase capacitor quantity to maintain ripple current distribution.
How should ESR variation with frequency affect selection of the UUE1E681MNS1ZD for output filtering in high-frequency buck converters?
The UUE1E681MNS1ZD's ESR is optimized for low-frequency performance (100–1000Hz range typical for aluminum electrolytics). As switching frequency increases into the 100kHz–500kHz range common in modern buck converters, the effective impedance of the UUE1E681MNS1ZD becomes dominated by inductance rather than resistance, reducing its ripple current effectiveness. At frequencies above 50kHz, pairing the UUE1E681MNS1ZD with parallel high-frequency ceramic capacitors (10–100µF, X7R, placed close to the switching node) becomes necessary to manage voltage ripple within acceptable bounds. The UUE1E681MNS1ZD alone will provide insufficient high-frequency filtering and may allow voltage overshoots of 5–15% at load transients if no complementary capacitance is present.
Can the UUE1E681MNS1ZD be soldered using lead-free (SAC305) reflow profiles without reliability compromise?
The UUE1E681MNS1ZD is marked RoHS-compliant, indicating lead-free solder compatibility, but aluminum electrolytic capacitors require careful reflow profile management. SAC305 lead-free solder reflows at 250–260°C peak temperature, typically 30–40°C higher than SnPb profiles. Extended exposure above 240°C risks thermal stress on the UUE1E681MNS1ZD's sealant and electrolyte, potentially causing premature drying or reduced lifetime. Recommended practice: limit peak temperature to 245°C maximum, keep the capacitor above 217°C for less than 60 seconds total, and verify the UUE1E681MNS1ZD placement is at least 15mm from primary heat zones on the board. Rework or repair of boards with the UUE1E681MNS1ZD installed requires local inert-atmosphere heating to avoid repeated thermal cycling.
How does the SMD package footprint (D18×L17.5mm) affect PCB layout density and thermal dissipation efficiency for the UUE1E681MNS1ZD?
The UUE1E681MNS1ZD's 18mm diameter and 17.5mm height make it one of the larger SMD passive components, occupying roughly 254 mm² of board area including typical 2mm clearance margins. This size limits placement density in high-integration designs but offers an advantage: the larger can surface area provides better thermal coupling to surrounding board copper and ambient air compared to smaller capacitors. For ripple current dissipation in the 500–800mA range, the UUE1E681MNS1ZD's physical size allows passive cooling through PCB copper planes without requiring active forced-air cooling. In compact designs where the UUE1E681MNS1ZD cannot be placed far from heat sources, prioritize routing thick copper (2–4oz) directly under the capacitor pad to create a thermal sink.
What paralleling strategy is optimal when a single UUE1E681MNS1ZD cannot supply sufficient ripple current capacity?
Two or more UUE1E681MNS1ZD units can be paralleled to increase ripple current capacity (approximately linear addition, accounting for ~10% measurement tolerance). However, paralleling requires careful attention to PCB routing: run separate traces from the power rail to each capacitor's positive terminal to ensure roughly equal current distribution and minimize inductance loops. Series resistance in shared traces causes current hogging in one capacitor while others remain underutilized, degrading both ripple current performance and thermal balance. For designs requiring 1600mA ripple current at 120Hz, two UUE1E681MNS1ZD units with optimized parallel routing will provide more predictable performance and better thermal spreading than a single larger-value capacitor. Additionally, paralleling improves reliability by distributing wear: if one UUE1E681MNS1ZD reaches end-of-life, the remaining unit provides partial capacity retention.
What aging behavior should be expected from the UUE1E681MNS1ZD over its 5000-hour lifetime, and how does this affect circuit performance?
Aluminum electrolytic capacitors like the UUE1E681MNS1ZD typically lose 10–15% of capacitance and experience ESR increases of 100–200% over their rated 5000-hour lifetime at 105°C. This nonlinear degradation means performance at 2500 hours (midlife) shows minimal change, but accelerates significantly in the final 1000 hours. In applications where the UUE1E681MNS1ZD is specified at the nominal 680µF value without design margin, end-of-life capacitance of roughly 577µF (−15%) combined with doubled ESR can cause voltage regulation to degrade by 3–8%. Practical design practice adds 20–30% capacitance margin beyond calculated minimum values when the UUE1E681MNS1ZD is the only bulk capacitor, or implements predictive replacement cycles (e.g., 80% of rated lifetime) for critical systems.
How do frequency and temperature interact to determine the effective ripple current rating for the UUE1E681MNS1ZD in real operating conditions?
The 804mA@120Hz ripple current specification for the UUE1E681MNS1ZD applies strictly at 120Hz and nominal temperature (typically 85°C). In practice, ripple current capacity scales with both frequency and ambient temperature. At frequencies above 1kHz, the UUE1E681MNS1ZD's ripple current rating decreases by roughly 20–40% due to inductive reactance dominance. Simultaneously, at 105°C (worst-case), permissible ripple current drops by approximately 30–50% compared to 85°C operation. For a UUE1E681MNS1ZD operating at 50kHz switching frequency and 95°C junction temperature, effective ripple current handling might be only 300–350mA despite the 804mA nameplate rating. Always reference manufacturer derating curves for your specific frequency and temperature combination, or conservatively assume 50% of the rated value for high-frequency applications above 100kHz.
Is the UUE1E681MNS1ZD suitable for automotive or harsh-environment applications requiring extended temperature or vibration resilience?
The UUE1E681MNS1ZD is a commercial-grade aluminum electrolytic capacitor with a −55°C to +125°C operating range but lacks automotive AEC-Q200 qualification, conformal coating, or enhanced vibration/moisture resistance. While temperature range alone meets some automotive passive component requirements, the UUE1E681MNS1ZD has not undergone the accelerated vibration, thermal cycling, or salt-spray testing mandated for vehicle systems. For automotive engine bay or underbody applications, specify an AEC-Q200 qualified electrolytic (typically from Nichicon's automotive product line) instead of the UUE1E681MNS1ZD. In industrial or outdoor stationary applications, the UUE1E681MNS1ZD is acceptable if environmental enclosures maintain operating temperature below 70°C and humidity levels are controlled; otherwise, protective potting or conformal coating around the UUE1E681MNS1ZD is advisable to prevent moisture ingress and ion migration.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nichicon UUE1E681MNS1ZD

Product Attribute UUE1E681MNS6ZD UUE1E331MNS1ZD UUE1E471MNS1ZD UUE1E681MNS1MS
Part Number UUE1E681MNS6ZD UUE1E331MNS1ZD UUE1E471MNS1ZD UUE1E681MNS1MS
Manufacturer Nichicon Nichicon Nichicon Nichicon
Size / Dimension - - - -
Ripple Current @ High Frequency - - - -
Tolerance - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Lifetime @ Temp. - - - -
Ripple Current @ Low Frequency - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Polarization - - - -
Surface Mount Land Size - - - -
Series - - - -
Voltage - Rated - - - -
Applications - - - -
Lead Spacing - - - -
Ratings - - - -
Capacitance - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Height - Seated (Max) - - - -
ESR (Equivalent Series Resistance) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

UUE1E681MNS1ZD Datasheet PDF

Download UUE1E681MNS1ZD pdf datasheets and Nichicon documentation for UUE1E681MNS1ZD - 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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Nichicon

UUE1E681MNS1ZD

Nichicon
98D-UUE1E681MNS1ZD

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