Equivalent & Substitute Parts for UKL1J331MHD1TO

Part Overview

The UKL1J331MHD1TO is a 330 µF, 63 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product portfolio. The UKL series offers a 2000-hour lifetime rating at 85°C with general-purpose applications. Identifying equivalent and substitute parts is necessary to support existing designs, manage inventory transitions, and ensure continued availability for maintenance and production requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	63 V
Tolerance	±20%
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Mounting Type	Through Hole
Polarization	Polar
Operating Temperature Range	-40°C ~ 85°C
Lifetime Rating	2000 Hrs @ 85°C

Substitute Part Grouping Explanation

Substitution for the UKL1J331MHD1TO is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 63 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Factors:

Operating temperature range must encompass or exceed the original -40°C ~ 85°C specification
Physical dimensions (diameter and height) must be compatible with PCB layout constraints
Lifetime rating and ripple current capabilities may vary based on application requirements

Parts are grouped into three categories:

Direct Equivalents (Same Series Characteristics): Parts maintaining identical electrical specifications and similar thermal performance characteristics.

Direct Substitutes (Enhanced Performance): Parts with identical electrical specifications but improved lifetime ratings or extended operating temperature ranges, suitable for direct replacement without circuit modification.

Upgrade Options (Higher Voltage Rating): Parts with 100 V voltage rating, providing overvoltage margin while maintaining identical capacitance and physical compatibility. These are suitable only when circuit design permits higher voltage components.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Height (Max)	Product Status
UKL1J331MHD1TO	Nichicon	UKL	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Not For New Designs
UPJ1J331MHD1TO	Nichicon	UPJ	330 µF	63 V	±20%	5000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00 mm)	1.043" (26.50 mm)	Not For New Designs
UPM1J331MHD1TO	Nichicon	UPM	330 µF	63 V	±20%	5000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Not For New Designs
URS1J331MHD1TO	Nichicon	URS	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	0.650" (16.50 mm)	Active
UBW1J331MHD1TO	Nichicon	UBW	330 µF	63 V	±20%	3000 Hrs @ 135°C	-55°C ~ 135°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Active
UFW2A331MHD1TO	Nichicon	UFW	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Not For New Designs
UVK2A331MHD1TO	Nichicon	UVK	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Not For New Designs
UVR2A331MHD1TO	Nichicon	UVR	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Not For New Designs
63RX30330MG412.5X25	Rubycon	RX30	330 µF	63 V	±20%	4000 Hrs @ 130°C	-40°C ~ 130°C	0.197" (5.00 mm)	1.063" (27.00 mm)	Active
860040778012	Würth Elektronik	WCAP-ATUL	330 µF	63 V	±20%	10000 Hrs @ 105°C	-40°C ~ 105°C	0.197" (5.00 mm)	1.043" (26.50 mm)	Active
860080778021	Würth Elektronik	WCAP-ATLI	330 µF	63 V	±20%	5000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00 mm)	1.043" (26.50 mm)	Active

Engineering Selection Recommendations

Nichicon URS1J331MHD1TO (Active Status)

The URS1J331MHD1TO is the primary recommended substitute. It maintains identical electrical specifications (330 µF, 63 V, ±20% tolerance) and thermal characteristics (2000 Hrs @ 85°C, -40°C ~ 85°C) as the UKL1J331MHD1TO. The URS series is classified as Active, ensuring continued availability and manufacturing support. The reduced height (0.650" vs. 1.063") may provide PCB layout advantages in space-constrained applications. ROHS3 compliance is maintained.

Nichicon UBW1J331MHD1TO (Enhanced Thermal Performance)

The UBW1J331MHD1TO offers extended operating temperature range (-55°C ~ 135°C) and improved lifetime rating (3000 Hrs @ 135°C). This part is suitable for applications requiring enhanced thermal margin or operation in elevated temperature environments. Active product status ensures supply continuity. Identical lead spacing and compatible physical dimensions support direct PCB substitution.

Würth Elektronik 860080778021 (Extended Lifetime)

The 860080778021 (WCAP-ATLI series) provides the highest lifetime rating among 63 V substitutes (5000 Hrs @ 105°C) with extended operating temperature range (-55°C ~ 105°C). This part is Active and suitable for long-life applications. Slightly larger diameter (0.512" vs. 0.492") requires verification of PCB layout compatibility.

Würth Elektronik 860040778012 (Maximum Lifetime)

The 860040778012 (WCAP-ATUL series) delivers the longest lifetime rating (10000 Hrs @ 105°C) among all 63 V options. This part is Active and recommended for mission-critical applications requiring maximum reliability. Diameter increase (0.512") and height reduction (1.043") require PCB layout confirmation.

Nichicon UPJ1J331MHD1TO and UPM1J331MHD1TO (Enhanced Specifications)

Both UPJ and UPM series parts provide improved lifetime (5000 Hrs @ 105°C) and extended temperature range (-55°C ~ 105°C). UPM1J331MHD1TO includes AEC-Q200 automotive qualification. These parts are classified as Not For New Designs but remain suitable for existing design support.

100 V Upgrade Options (UFW2A331MHD1TO, UVK2A331MHD1TO, UVR2A331MHD1TO)

These parts are suitable only when circuit design permits higher voltage rating. All maintain 330 µF capacitance and identical lead spacing. Selection among these three requires application-specific evaluation of ripple current requirements and thermal performance.

Rubycon 63RX30330MG412.5X25 (Cross-Manufacturer Alternative)

This Rubycon part provides 4000 Hrs @ 105°C lifetime with extended temperature range (-40°C ~ 130°C) and AEC-Q200 automotive qualification. Active status ensures availability. Identical lead spacing and compatible dimensions support direct substitution.

Frequently Asked Questions (FAQ)

Q: Can URS1J331MHD1TO directly replace UKL1J331MHD1TO without circuit modification?

A: Yes. Both parts share identical electrical specifications (330 µF, 63 V, ±20% tolerance), operating temperature range (-40°C ~ 85°C), and lifetime rating (2000 Hrs @ 85°C). Lead spacing (0.197" / 5.00 mm) and polarization are identical. The URS series is Active, providing supply continuity. The reduced height (0.650" vs. 1.063") may require PCB layout verification to confirm clearance compatibility.

Q: What is the primary advantage of selecting UBW1J331MHD1TO over URS1J331MHD1TO?

A: The UBW series extends the operating temperature range to -55°C ~ 135°C and provides improved lifetime rating (3000 Hrs @ 135°C) compared to URS (2000 Hrs @ 85°C). Selection depends on application thermal requirements. Both maintain identical capacitance, voltage, and lead spacing specifications.

Q: Are the 100 V rated parts (UFW2A331MHD1TO, UVK2A331MHD1TO, UVR2A331MHD1TO) suitable substitutes?

A: These parts are suitable only when circuit design permits higher voltage rating. While they maintain 330 µF capacitance and identical lead spacing, the 100 V rating differs from the original 63 V specification. Verify that the circuit design accommodates higher voltage components before substitution.

Q: What is the difference between Würth Elektronik 860080778021 and 860040778012?

A: Both are Würth Elektronik 330 µF, 63 V radial capacitors with identical lead spacing. The 860080778021 (WCAP-ATLI) provides 5000 Hrs @ 105°C lifetime with -55°C ~ 105°C operating range. The 860040778012 (WCAP-ATUL) provides 10000 Hrs @ 105°C lifetime with -40°C ~ 105°C operating range. Selection depends on required lifetime and minimum operating temperature requirements. Both have slightly larger diameter (0.512") than the original part.

Q: Can Rubycon 63RX30330MG412.5X25 replace Nichicon UKL1J331MHD1TO?

A: Yes. Both parts maintain 330 µF capacitance, 63 V voltage rating, ±20% tolerance, and identical lead spacing (0.197" / 5.00 mm). The Rubycon part offers improved lifetime (4000 Hrs @ 130°C) and extended temperature range (-40°C ~ 130°C). Physical dimensions are compatible. The Rubycon part includes AEC-Q200 automotive qualification.

Q: Why is UKL1J331MHD1TO classified as Not For New Designs?

A: This classification indicates the part has been superseded in Nichicon's product portfolio. Newer series with improved performance characteristics or extended lifetime ratings are available. For existing designs requiring component replacement or maintenance, equivalent parts from active series (such as URS1J331MHD1TO) are recommended.

Q: What parameters must remain identical for direct substitution?

A: Direct substitution requires exact matching of: capacitance (330 µF), voltage rating (63 V), tolerance (±20%), lead spacing (0.197" / 5.00 mm), package type (Radial, Can), mounting type (Through Hole), and polarization (Polar). Operating temperature range and lifetime rating may be equal or superior without affecting compatibility.

Q: Are there compliance differences between substitute parts?

A: All listed parts maintain ROHS3 compliance. UPM1J331MHD1TO and 63RX30330MG412.5X25 include AEC-Q200 automotive qualification. UBW1J331MHD1TO and UPM1J331MHD1TO have REACH Affected status, while others are REACH Unaffected. Verify compliance requirements for your specific application before selection.

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