UCD1A680MCL1GS Equivalent & Substitute Parts

Part Overview

The UCD1A680MCL1GS is a 68 µF, 10 V aluminum electrolytic capacitor in surface mount radial can package manufactured by Nichicon. This component is rated for automotive applications with AEC-Q200 compliance and offers 2000 hours lifetime at 105°C operating temperature. The part is currently active in production with 750 pieces in stock.

Equivalent and substitute parts are necessary when the original part becomes unavailable, when design requirements demand higher voltage ratings or improved performance characteristics, or when alternative manufacturers' components meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	68 µF
Voltage Rating	10 V
Tolerance	±20%
Package Type	Radial, Can - SMD
Size / Dimension	0.248" Dia (6.30mm)
Height - Seated (Max)	0.240" (6.10mm)
Surface Mount Land Size	0.260" L x 0.260" W (6.60mm x 6.60mm)
Operating Temperature Range	-55°C ~ 105°C
Lifetime @ Temperature	2000 Hrs @ 105°C
Ripple Current @ 120 Hz	120 mA
Ripple Current @ 100 kHz	240 mA
Impedance	360 mOhms
RoHS Status	ROHS3 Compliant
Ratings	AEC-Q200
Applications	Automotive

Substitute Part Grouping Explanation

Substitution of the UCD1A680MCL1GS is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance value: 68 µF (fixed requirement)
Tolerance: ±20% (fixed requirement)
Package type: Radial, Can - SMD (fixed requirement)
Physical dimensions: 0.248" Dia (6.30mm), Height ≤ 0.240" (6.10mm)
Surface mount land size: 0.260" L x 0.260" W (6.60mm x 6.60mm)
Operating temperature range: -55°C ~ 105°C minimum
Polarization: Polar

Voltage Rating Substitution Logic: Parts with equal or higher voltage ratings are acceptable substitutes. A 10 V rated capacitor may be replaced with 16 V or 25 V rated parts without electrical degradation, provided all other parameters remain compatible.

Performance Parameter Flexibility:

Ripple current ratings may vary between substitute parts
Impedance values may differ within acceptable ranges
Lifetime ratings of 2000 Hrs @ 105°C or greater are acceptable
Compliance certifications (AEC-Q200) and RoHS status must be maintained for automotive applications

Series and Manufacturer Variations: Nichicon series UCD, UCD1C, UCD1E, UUD, UWD, and UCL are compatible within the same capacitance and voltage specifications. Panasonic EEE-FK series parts meeting identical electrical and mechanical parameters are also acceptable substitutes.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Size (Dia)	Height (Max)	Lifetime @ 105°C	Ripple Current @ 120 Hz	Impedance	Status	Ratings
UCD1A680MCL1GS	Nichicon	UCD	68 µF	10 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	120 mA	360 mOhms	Active	AEC-Q200
UCD1C680MCL1GS	Nichicon	UCD	68 µF	16 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	120 mA	360 mOhms	Active	AEC-Q200
UCD1E680MCL1GS	Nichicon	UCD	68 µF	25 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	120 mA	360 mOhms	Active	AEC-Q200
UUD1A680MCL1GS	Nichicon	UUD	68 µF	10 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	115 mA	440 mOhms	Active	AEC-Q200
UCL1C680MCL1GS	Nichicon	UCL	68 µF	16 V	±20%	0.248" (6.30mm)	0.228" (5.80mm)	2000 Hrs	150 mA	260 mOhms	Active	—
UWD1A680MCL1GS	Nichicon	UWD	68 µF	10 V	±20%	0.248" (6.30mm)	0.228" (5.80mm)	2000 Hrs	115 mA	440 mOhms	Active	—
UWF1A680MCL1GB	Nichicon	UWF	68 µF	10 V	±20%	0.248" (6.30mm)	0.217" (5.50mm)	1000 Hrs	57.5 mA	1.3 Ohms	Obsolete	—
EEE-FK1C680AP	Panasonic	FK	68 µF	16 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	156 mA	360 mOhms	Active	AEC-Q200
EEE-FK1C680P	Panasonic	FK	68 µF	16 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	180 mA	360 mOhms	Active	AEC-Q200
EEE-FK1E680AP	Panasonic	FK	68 µF	25 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	156 mA	360 mOhms	Active	AEC-Q200
EEE-FK1E680P	Panasonic	FK	68 µF	25 V	±20%	0.248" (6.30mm)	0.240" (6.10mm)	2000 Hrs	180 mA	360 mOhms	Active	AEC-Q200

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Rating): UUD1A680MCL1GS is a direct parametric equivalent with identical 10 V rating, 68 µF capacitance, and AEC-Q200 automotive certification. Both parts maintain 2000 Hrs @ 105°C lifetime and identical physical dimensions. This part is preferred when exact voltage matching is required.

Upgrade Substitutes (Higher Voltage Rating): UCD1C680MCL1GS (16 V) and UCD1E680MCL1GS (25 V) are voltage-upgraded variants within the same Nichicon UCD series. These maintain identical physical footprints, AEC-Q200 compliance, and automotive application suitability. Higher voltage ratings provide additional design margin without physical or electrical incompatibility.

Cross-Manufacturer Alternatives: Panasonic EEE-FK series parts (EEE-FK1C680AP, EEE-FK1C680P, EEE-FK1E680AP, EEE-FK1E680P) are active production alternatives with AEC-Q200 certification and automotive application ratings. These parts match the physical dimensions and electrical specifications of their Nichicon equivalents at corresponding voltage ratings.

General Purpose Alternatives: UCL1C680MCL1GS and UWD1A680MCL1GS are general purpose series variants without automotive-specific ratings. These parts are suitable only for non-automotive applications where AEC-Q200 compliance is not required. UCL1C680MCL1GS offers improved impedance (260 mOhms) and higher ripple current capability (150 mA @ 120 Hz).

Obsolete Parts: UWF1A680MCL1GB is obsolete and should not be selected for new designs. This part exhibits significantly higher impedance (1.3 Ohms), reduced ripple current capability (57.5 mA @ 120 Hz), and shorter lifetime (1000 Hrs @ 105°C) compared to active alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use a 16 V or 25 V rated capacitor in place of the 10 V UCD1A680MCL1GS? A: Yes. Higher voltage-rated capacitors are direct substitutes provided all other parameters remain identical. A 16 V or 25 V capacitor will function correctly in a 10 V circuit without performance degradation.

Q: What is the difference between Nichicon UCD and UUD series at the same voltage rating? A: Both series maintain identical 68 µF capacitance, 10 V rating, and 2000 Hrs @ 105°C lifetime. UUD1A680MCL1GS exhibits slightly higher impedance (440 mOhms vs. 360 mOhms) and marginally lower ripple current (115 mA vs. 120 mA @ 120 Hz). Both are AEC-Q200 compliant automotive parts.

Q: Are Panasonic EEE-FK parts suitable replacements for automotive applications? A: Yes. Panasonic EEE-FK series parts carry AEC-Q200 certification and are rated for automotive applications. They maintain identical physical dimensions and electrical specifications at corresponding voltage ratings.

Q: Why is the UWF1A680MCL1GB listed as obsolete? A: UWF1A680MCL1GB is no longer in active production. Additionally, this part exhibits inferior electrical characteristics including 1.3 Ohms impedance, 57.5 mA ripple current @ 120 Hz, and only 1000 Hrs @ 105°C lifetime compared to 2000 Hrs in active alternatives.

Q: Can I substitute UCL1C680MCL1GS for automotive applications? A: No. UCL1C680MCL1GS lacks AEC-Q200 certification and is rated for general purpose applications only. For automotive designs requiring AEC-Q200 compliance, use UCD, UUD, or Panasonic EEE-FK series parts.

Q: Do all substitute parts use the same PCB footprint? A: All listed parts share identical surface mount land size (0.260" L x 0.260" W / 6.60mm x 6.60mm). Physical height varies slightly: UCD and Panasonic FK series measure 0.240" (6.10mm), while UCL and UWD series measure 0.228" (5.80mm), and obsolete UWF measures 0.217" (5.50mm). Verify PCB clearance for height-sensitive applications.

Q: What inventory status should I consider for production planning? A: UCD1E680MCL1GS (59,539 pcs), EEE-FK1E680P (57,930 pcs), and EEE-FK1C680AP (42,034 pcs) offer the highest stock levels. UCD1A680MCL1GS maintains 750 pieces in stock. Verify current availability with your supplier for long-term production requirements.

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