Equivalent & Substitute Parts for UKL0J681MPD

Part Overview

The UKL0J681MPD is a 680 µF, 6.3 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has reached end-of-life status. Finding equivalent and substitute parts is necessary for legacy system maintenance, repair applications, and designs requiring compatible alternatives with improved performance characteristics such as higher voltage ratings, extended operational lifetimes, or wider temperature ranges.

Key Parameters

Parameter	Value
Capacitance	680 µF
Tolerance	±20%
Voltage - Rated	6.3 V
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Lead Spacing	0.197" (5.00 mm)
Size / Dimension	0.394" Dia (10.00 mm)
Height - Seated (Max)	0.689" (17.50 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UKL0J681MPD is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Compatibility Parameters:

Capacitance: 680 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Size / Dimension: 0.394" Dia (10.00 mm) (exact match required)
Height - Seated (Max): 0.689" (17.50 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Allowable Upgrade Parameters:

Voltage - Rated: May be equal to or higher than 6.3 V
Lifetime @ Temperature: May be equal to or higher than 2000 Hrs @ 85°C
Operating Temperature Range: May be equal to or wider than -40°C ~ 85°C
RoHS Status: Must maintain ROHS3 Compliance

Substitute parts are grouped into two categories: Upgrade parts (offering improved electrical performance while maintaining mechanical compatibility) and Similar parts (offering comparable performance with active product status).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage (V)	Lifetime @ Temp.	Operating Temp. Range	Lead Spacing	Size Dia	Height (Max)	Product Status	RoHS Status
UKL0J681MPD	Nichicon	680 µF	6.3	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHD1C681MPD6	Nichicon	680 µF	16	4000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHV1E681MPD	Nichicon	680 µF	25	6000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UHW1E681MPD	Nichicon	680 µF	25	10000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UPS1C681MPD	Nichicon	680 µF	16	2000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
UPA1E681MPD	Nichicon	680 µF	25	4000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant
16RX30680M10X16	Rubycon	680 µF	16	2000 Hrs @ 130°C	-40°C ~ 130°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant
16YXG680MEFC10X16	Rubycon	680 µF	16	5000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Not For New Designs	ROHS3 Compliant
16ZL680MEFC10X16	Rubycon	680 µF	16	4000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Last Time Buy	ROHS3 Compliant
16ZLG680MEFC10X16	Rubycon	680 µF	16	4000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant
25ZLH680MEFCCC10X16	Rubycon	680 µF	25	10000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	0.394" (10.00 mm)	0.689" (17.50 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Active Product Status Priority: Select UPA1E681MPD (Nichicon, Active status, 25 V, 4000 Hrs @ 105°C) or 16RX30680M10X16 (Rubycon, Active status, 16 V, 2000 Hrs @ 130°C) for new designs and long-term supply chain stability. Both maintain ROHS3 compliance and offer voltage upgrades over the original UKL0J681MPD.

For Extended Operational Lifetime: Select UHW1E681MPD (Nichicon, 10000 Hrs @ 105°C, 25 V) or 25ZLH680MEFCCC10X16 (Rubycon, 10000 Hrs @ 105°C, 25 V) when applications require maximum capacitor lifespan and thermal stability at elevated temperatures.

For Automotive Applications: Select 16RX30680M10X16 (Rubycon RX30 series, AEC-Q200 rated, 2000 Hrs @ 130°C) for automotive-grade reliability and extended temperature operation to 130°C.

For Voltage Margin Enhancement: Select UHV1E681MPD (Nichicon, 25 V) or UHD1C681MPD6 (Nichicon, 16 V) to increase voltage headroom in circuits originally designed for 6.3 V operation, improving reliability margins.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a direct replacement? A: Yes. A capacitor with higher voltage rating (16 V or 25 V) is a direct mechanical and electrical substitute for the 6.3 V UKL0J681MPD, provided all other parameters (capacitance, tolerance, lead spacing, physical dimensions, and mounting type) remain identical. Higher voltage ratings do not degrade circuit performance.

Q: What is the difference between Nichicon and Rubycon substitutes? A: Both manufacturers produce 680 µF radial aluminum electrolytic capacitors with identical mechanical compatibility. Nichicon substitutes (UHD, UHV, UHW, UPS, UPA series) and Rubycon substitutes (RX30, YXG, ZL, ZLG, ZLH series) differ in series designation, lifetime ratings, and product status. Selection depends on supply availability, product lifecycle status, and specific thermal or automotive requirements.

Q: Why is product status important in selecting a substitute? A: Product status indicates manufacturer support and supply continuity. Active status parts (UPA1E681MPD, 16RX30680M10X16, 16ZLG680MEFC10X16, 25ZLH680MEFCCC10X16) ensure long-term availability. Not For New Designs and Last Time Buy parts are suitable for legacy system repairs but not recommended for new product development.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the original UKL0J681MPD.

Q: What does "Lifetime @ Temperature" mean for capacitor selection? A: Lifetime @ Temperature specifies the expected operational duration at a stated temperature before capacitor degradation occurs. The UKL0J681MPD is rated 2000 Hrs @ 85°C. Substitutes with higher lifetime ratings (4000, 5000, 6000, or 10000 Hrs @ 105°C) provide extended service life, particularly in thermally demanding applications.

Q: Can I substitute a 16 V part for a 25 V part or vice versa? A: No. Voltage rating is a mandatory compatibility parameter. Select the voltage rating appropriate for your circuit design. Higher voltage ratings provide margin but do not substitute for lower ratings in the same application context.

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