UKL1V331MHD Equivalent & Substitute Parts

Part Overview

The Nichicon UKL1V331MHD is a 330 µF, 35 V aluminum electrolytic capacitor in radial, can package with ±20% tolerance. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product portfolio. The part operates across -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, suitable for general-purpose applications requiring energy storage and filtering.

Finding equivalent or substitute parts is necessary due to the product's discontinued status for new designs. Alternative components with improved specifications, extended operational ranges, or active product status are available to meet current design requirements while maintaining functional compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	35 V
Tolerance	±20%
Operating Temperature Range	-40°C ~ 85°C
Lifetime @ Temperature	2000 Hrs @ 85°C
Lead Spacing	0.197" (5.00mm)
Package Type	Radial, Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UKL1V331MHD is determined by the following criteria:

Primary Compatibility Requirements:

Capacitance value: 330 µF (exact match required)
Voltage rating: Equal to or greater than 35 V
Tolerance: ±20% or tighter (±10% acceptable)
Lead spacing: 0.197" (5.00mm)
Package type: Radial, Can
Mounting type: Through Hole
Polarization: Polar

Substitution Categories:

Upgrade Parts — Higher voltage ratings (50 V, 63 V) or extended temperature ranges with improved lifetime specifications. These provide enhanced reliability margins and are suitable for designs requiring higher voltage headroom or extended operational temperatures.

Similar Parts — Same voltage rating (35 V) with identical capacitance and tolerance, but different physical dimensions or series designations. These maintain electrical equivalence while offering alternative form factors.

Parametric Equivalents — Identical electrical and mechanical specifications with tighter tolerance (±10% vs ±20%), providing improved capacitance accuracy within the same voltage and temperature class.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Temp Range	Lifetime @ Temp	Lead Spacing	Height (Max)	Product Status
UKL1V331MHD	Nichicon	330 µF	35 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.846" (21.50mm)	Not For New Designs
UBT1H331MHD8	Nichicon	330 µF	50 V	±20%	-40°C ~ 125°C	10000 Hrs @ 125°C	0.197" (5.00mm)	0.866" (22.00mm)	Active
UBW1H331MHD	Nichicon	330 µF	50 V	±20%	-55°C ~ 135°C	3000 Hrs @ 135°C	0.197" (5.00mm)	0.866" (22.00mm)	Active
UKL1H331KHD	Nichicon	330 µF	50 V	±10%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.846" (21.50mm)	Not For New Designs
UPS1J331MHD	Nichicon	330 µF	63 V	±20%	-55°C ~ 105°C	3000 Hrs @ 105°C	0.197" (5.00mm)	0.866" (22.00mm)	Not For New Designs
URS1H331MHD	Nichicon	330 µF	50 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.551" (14.00mm)	Active
URS1V331MPD	Nichicon	330 µF	35 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.551" (14.00mm)	Active
UVR1V331MPD	Nichicon	330 µF	35 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.551" (14.00mm)	Not For New Designs
UKL1V331KHD	Nichicon	330 µF	35 V	±10%	-40°C ~ 85°C	2000 Hrs @ 85°C	0.197" (5.00mm)	0.846" (21.50mm)	Not For New Designs
337CKH063M	Cornell Dubilier / Illinois Capacitor	330 µF	63 V	±20%	-40°C ~ 105°C	2000 Hrs @ 105°C	0.197" (5.00mm)	0.846" (21.50mm)	Active
50RX30330M12.5X20	Rubycon	330 µF	50 V	±20%	-40°C ~ 130°C	4000 Hrs @ 130°C	0.197" (5.00mm)	0.866" (22.00mm)	Active

Engineering Selection Recommendations

For Direct Replacement (Same Voltage, Active Status): URS1V331MPD is the primary recommendation. This Nichicon part maintains the 35 V voltage rating and identical electrical specifications while offering Active product status. The reduced height (0.551" vs 0.846") provides a compact alternative suitable for space-constrained layouts. Both parts share identical lead spacing and through-hole mounting.

For Voltage Margin Enhancement: URS1H331MHD provides a 50 V rating with Active status, maintaining the same temperature range and lifetime as the original part. This upgrade is suitable for applications requiring higher voltage headroom without thermal or operational range changes.

For Extended Temperature and Lifetime Performance: UBT1H331MHD8 offers 50 V rating with extended operational range (-40°C to 125°C) and significantly improved lifetime (10000 Hrs @ 125°C). This Nichicon automotive-grade part is appropriate for designs requiring enhanced reliability and thermal performance.

For Highest Voltage Rating: 337CKH063M (Cornell Dubilier) and UPS1J331MHD (Nichicon) both provide 63 V ratings. The Cornell Dubilier part carries Active status, while the Nichicon part is Not For New Designs. Both support extended temperature ranges suitable for demanding applications.

For Tighter Tolerance Requirement: UKL1V331KHD maintains the original 35 V rating with improved ±10% tolerance specification, providing enhanced capacitance accuracy within the same thermal and voltage class.

All recommended substitutes maintain ROHS3 compliance and identical lead spacing (0.197" / 5.00mm) for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of the 35 V UKL1V331MHD? A: Yes. Higher voltage ratings are electrically compatible and provide additional voltage margin. The capacitor will operate safely at voltages up to its rated value. URS1H331MHD and UBT1H331MHD8 are suitable 50 V alternatives.

Q: What is the difference between "Upgrade," "Similar," and "Parametric Equivalent" classifications? A: Upgrade parts offer enhanced specifications (higher voltage, extended temperature range, or longer lifetime). Similar parts maintain identical electrical ratings with different physical dimensions or series designations. Parametric equivalents match all specifications with improved tolerance accuracy.

Q: Does the height difference between 0.846" and 0.551" affect PCB compatibility? A: Height differences do not affect electrical compatibility. However, physical clearance on the PCB must be verified. Shorter components (0.551") like URS1V331MPD and URS1H331MHD provide space advantages in compact designs. Taller components (0.866") like UBT1H331MHD8 and UBW1H331MHD require adequate vertical clearance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original UKL1V331MHD specification.

Q: What does "Not For New Designs" product status mean? A: This designation indicates the part has been superseded in the manufacturer's portfolio. While existing inventory remains available, new designs should utilize Active status alternatives such as URS1V331MPD, URS1H331MHD, UBT1H331MHD8, or UBW1H331MHD.

Q: Can I substitute a ±10% tolerance part for the ±20% original? A: Yes. Tighter tolerance specifications are compatible and provide improved capacitance accuracy. UKL1V331KHD offers ±10% tolerance as a direct parametric equivalent.

Q: Which substitute offers the best long-term reliability? A: UBT1H331MHD8 provides the longest rated lifetime (10000 Hrs @ 125°C) with the widest temperature range (-40°C to 125°C), making it suitable for demanding automotive and industrial applications.

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