USF1C680MDD Equivalent & Substitute Parts

Part Overview

The USF1C680MDD is a 68 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 1000 hours at 105°C and is designed for general-purpose applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new procurement requirements.

Key Parameters

Parameter	Value
Capacitance	68 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ 105°C	1000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.138" (4.60mm)
Size / Dimension	0.315" Dia (8.00mm)
Height - Seated (Max)	0.315" (8.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the USF1C680MDD is determined by the following critical parameters:

Capacitance: 68 µF (exact match required)
Voltage Rating: 16 V (minimum; higher voltage ratings are acceptable)
Tolerance: ±20% (standard tolerance for aluminum electrolytic capacitors)
Package Type: Radial, Can (through-hole mounting)
Lead Spacing: Physical compatibility with PCB layout
Physical Dimensions: Size constraints for board placement
Operating Temperature Range: -55°C ~ 105°C (minimum requirement)
Polarization: Polar (required for electrolytic capacitors)

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (16 V Rating) Parts with identical voltage rating, capacitance, and compatible physical dimensions. These provide direct replacement capability with minimal design verification.

Category B - Higher Voltage Rated Equivalents (50 V Rating) Parts with elevated voltage rating but identical capacitance. These provide enhanced voltage margin and are electrically compatible in 16 V applications, though they may have different physical dimensions and thermal characteristics.

Parameter Comparison

Parameter	USF1C680MDD	UPM1C680MED	UPM1H680MPD	EEU-FC1C680	EEU-FC1C680B	EEU-FC1C680H
Manufacturer	Nichicon	Nichicon	Nichicon	Panasonic	Panasonic	Panasonic
Capacitance	68 µF	68 µF	68 µF	68 µF	68 µF	68 µF
Voltage Rating	16 V	16 V	50 V	16 V	16 V	16 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	1000 Hrs	2000 Hrs	3000 Hrs	1000 Hrs	1000 Hrs	1000 Hrs
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar	Polar
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.138" (4.60mm)	0.098" (2.50mm)	0.138" (4.60mm)	0.079" (2.00mm)	0.197" (5.00mm)	0.098" (2.50mm)
Size / Dimension	0.315" Dia (8.00mm)	0.248" Dia (6.30mm)	0.315" Dia (8.00mm)	0.197" Dia (5.00mm)	0.197" Dia (5.00mm)	0.197" Dia (5.00mm)
Height - Seated (Max)	0.315" (8.00mm)	0.492" (12.50mm)	0.512" (13.00mm)	0.472" (12.00mm)	0.571" (14.50mm)	0.472" (12.00mm)
Impedance	500 mOhms	500 mOhms	200 mOhms	800 mOhms	800 mOhms	800 mOhms
Ripple Current @ 120 Hz	100 mA	135 mA	260 mA	113.8 mA	113.8 mA	113.8 mA
Ripple Current @ High Frequency	200 mA @ 100 kHz	240 mA @ 10 kHz	415 mA @ 10 kHz	175 mA @ 100 kHz	175 mA @ 100 kHz	175 mA @ 100 kHz
Product Status	Obsolete	Obsolete	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ratings	—	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200

Engineering Selection Recommendations

For Direct Replacement (Same Voltage, Same Physical Footprint)

UPM1H680MPD is the only substitute with matching lead spacing (0.138" / 4.60mm) and identical diameter (0.315" / 8.00mm) to the USF1C680MDD. However, this part carries a 50 V rating and is marked "Not For New Designs." It provides extended thermal life (3000 Hrs @ 105°C) and lower impedance (200 mOhms), making it suitable for legacy system support where PCB layout constraints are critical.

For Active Product Status with 16 V Rating

EEU-FC1C680, EEU-FC1C680B, and EEU-FC1C680H are all manufactured by Panasonic and carry Active product status. All three are AEC-Q200 rated and ROHS3 compliant. These parts differ in lead spacing and packaging:

EEU-FC1C680: 0.079" (2.00mm) lead spacing, Bulk packaging
EEU-FC1C680B: 0.197" (5.00mm) lead spacing, Cut Tape packaging
EEU-FC1C680H: 0.098" (2.50mm) lead spacing, Cut Tape packaging

Selection among these three depends on PCB layout requirements and lead spacing compatibility. All provide equivalent electrical performance at 16 V with 1000 Hrs @ 105°C lifetime.

For Extended Thermal Life with 16 V Rating

UPM1C680MED (Nichicon, Obsolete) provides doubled thermal life (2000 Hrs @ 105°C) compared to the original part, with AEC-Q200 automotive rating. Lead spacing is 0.098" (2.50mm) and diameter is 0.248" (6.30mm), requiring PCB layout verification.

Compliance and Certification

All substitute parts are ROHS3 compliant. Panasonic parts (EEU-FC series) and UPM1C680MED carry AEC-Q200 automotive qualification. For new designs, Panasonic EEU-FC series parts are recommended due to Active product status and automotive-grade certification.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of a 16 V rated capacitor?

A: Yes. A higher voltage rating is electrically compatible in a 16 V application. The UPM1H680MPD (50 V) can replace the USF1C680MDD (16 V) electrically. However, physical dimensions and lead spacing must be verified for PCB compatibility.

Q: What is the difference between the Panasonic EEU-FC1C680 variants?

A: EEU-FC1C680, EEU-FC1C680B, and EEU-FC1C680H are electrically identical (68 µF, 16 V, 1000 Hrs @ 105°C) but differ in lead spacing and packaging. EEU-FC1C680 has 0.079" spacing (Bulk), EEU-FC1C680B has 0.197" spacing (Cut Tape), and EEU-FC1C680H has 0.098" spacing (Cut Tape). Selection depends on PCB layout requirements.

Q: Why is the USF1C680MDD marked as Obsolete?

A: Nichicon has discontinued this part number. Substitute parts from active product lines (Panasonic EEU-FC series) or higher-rated alternatives (UPM1H680MPD) should be used for new procurement.

Q: Are all substitute parts AEC-Q200 rated?

A: No. The original USF1C680MDD does not list AEC-Q200 rating. Panasonic EEU-FC series and Nichicon UPM series parts carry AEC-Q200 automotive qualification. For automotive applications, AEC-Q200 rated parts are recommended.

Q: What does "Not For New Designs" mean for the UPM1H680MPD?

A: This designation indicates the part is available for legacy system support and replacement but should not be selected for new product designs. For new designs, use parts with Active status such as the Panasonic EEU-FC series.

Q: How do I verify physical compatibility before substitution?

A: Compare lead spacing, diameter, and height dimensions. The USF1C680MDD has 0.138" lead spacing, 0.315" diameter, and 0.315" height. Only UPM1H680MPD matches these dimensions exactly. Other substitutes require PCB layout verification.

Q: What is the significance of impedance differences?

A: Impedance affects high-frequency performance and ripple current handling. Lower impedance (UPM1H680MPD at 200 mOhms) provides better high-frequency ripple current capability (415 mA @ 10 kHz) compared to higher impedance parts (800 mOhms for Panasonic EEU-FC series at 175 mA @ 100 kHz). Application ripple current requirements determine suitability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message