UKL1H331MHD Equivalent & Substitute Parts

Part Overview

The Nichicon UKL1H331MHD is a 330 µF, 50 V aluminum electrolytic capacitor in radial, can package with 2000 hours lifetime at 85°C. This part carries a "Not For New Designs" status, indicating it has been superseded in Nichicon's product line. Finding equivalent and substitute parts is necessary for ongoing production support, legacy system maintenance, and design flexibility when the primary part becomes unavailable or when enhanced performance characteristics are required.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.492" (12.50 mm)
Height	0.846" (21.50 mm)
Mounting Type	Through Hole
Package	Radial, Can
Ripple Current @ 120 Hz	600 mA
Ripple Current @ 10 kHz	900 mA

Substitute Part Grouping Explanation

Substitute parts for the UKL1H331MHD are categorized based on the following substitution criteria:

Upgrade Substitutes maintain identical capacitance (330 µF), voltage rating (50 V), tolerance (±20%), lead spacing (5.00 mm), and case diameter (12.50 mm), while offering enhanced lifetime ratings, extended operating temperature ranges, or higher ripple current capabilities. These parts are direct functional upgrades suitable for applications requiring improved reliability or thermal performance.

Similar Substitutes match the core electrical specifications (330 µF, 50 V, ±20% tolerance, 2000 Hrs @ 85°C, -40°C ~ 85°C operating range) and mechanical footprint (5.00 mm lead spacing, 12.50 mm diameter) but differ in case height or ripple current ratings. These parts are mechanically compatible with potential PCB layout considerations.

Parametric Equivalents share identical electrical and mechanical specifications but vary in tolerance (±10% vs. ±20%), maintaining full functional compatibility within tighter tolerance bands.

Direct Substitutes from alternative manufacturers (Panasonic, Vishay) provide equivalent or superior performance with identical or compatible mechanical dimensions and electrical ratings.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Case Dia	Height	Status
UKL1H331MHD	Nichicon	330 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	5.00 mm	12.50 mm	21.50 mm	Not For New Designs
UBT1H331MHD8	Nichicon	330 µF	50 V	±20%	10000 Hrs @ 125°C	-40°C ~ 125°C	5.00 mm	12.50 mm	22.00 mm	Active
UBW1H331MHD	Nichicon	330 µF	50 V	±20%	3000 Hrs @ 135°C	-55°C ~ 135°C	5.00 mm	12.50 mm	22.00 mm	Active
UPS1J331MHD	Nichicon	330 µF	63 V	±20%	3000 Hrs @ 105°C	-55°C ~ 105°C	5.00 mm	12.50 mm	22.00 mm	Not For New Designs
URS1H331MHD	Nichicon	330 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	5.00 mm	12.50 mm	14.00 mm	Active
UVR1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	5.00 mm	10.00 mm	17.50 mm	Not For New Designs
UKL1H331KHD	Nichicon	330 µF	50 V	±10%	2000 Hrs @ 85°C	-40°C ~ 85°C	5.00 mm	12.50 mm	21.50 mm	Not For New Designs
EEU-TA1H331	Panasonic	330 µF	50 V	±20%	2000 Hrs @ 125°C	-40°C ~ 125°C	5.00 mm	12.50 mm	22.00 mm	Active
MAL213631331E3	Vishay	330 µF	50 V	±20%	7000 Hrs @ 105°C	-55°C ~ 105°C	5.00 mm	12.50 mm	22.00 mm	Active
MAL213651331E3	Vishay	330 µF	50 V	±20%	7000 Hrs @ 105°C	-55°C ~ 105°C	5.00 mm	12.50 mm	22.00 mm	Active
MAL213661331E3	Vishay	330 µF	50 V	±20%	7000 Hrs @ 105°C	-55°C ~ 105°C	5.00 mm	12.50 mm	22.00 mm	Active

Engineering Selection Recommendations

For Active Product Designs: UBT1H331MHD8 or UBW1H331MHD (Nichicon automotive-grade) provide superior lifetime ratings and extended temperature ranges while maintaining identical electrical specifications and mechanical compatibility. Both parts are Active status and ROHS3 compliant.

For Cross-Manufacturer Compatibility: EEU-TA1H331 (Panasonic) and MAL213631331E3, MAL213651331E3, or MAL213661331E3 (Vishay) are Active status alternatives with equivalent or extended lifetime ratings. All maintain 5.00 mm lead spacing and 12.50 mm case diameter compatibility.

For Space-Constrained Applications: URS1H331MHD offers identical electrical performance with reduced height (14.00 mm vs. 21.50 mm), suitable for PCB layouts with vertical clearance limitations.

For Tighter Tolerance Requirements: UKL1H331KHD provides ±10% tolerance versus the standard ±20%, maintaining all other specifications of the original part.

For Higher Voltage Applications: UPS1J331MHD operates at 63 V rating (vs. 50 V), providing additional voltage margin in circuits where the original 50 V rating is marginal.

Frequently Asked Questions (FAQ)

Q: Can UBT1H331MHD8 directly replace UKL1H331MHD in existing designs? A: Yes. Both parts share identical capacitance (330 µF), voltage rating (50 V), tolerance (±20%), and mechanical footprint (5.00 mm lead spacing, 12.50 mm diameter). The UBT variant offers enhanced lifetime (10000 Hrs @ 125°C vs. 2000 Hrs @ 85°C) and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), making it a direct upgrade with no design modifications required.

Q: What is the difference between Nichicon URS1H331MHD and the original UKL1H331MHD? A: Both parts are electrically identical (330 µF, 50 V, ±20%, 2000 Hrs @ 85°C). The primary difference is case height: URS1H331MHD is 14.00 mm tall versus UKL1H331MHD at 21.50 mm. URS1H331MHD is Active status, making it suitable for new designs with space constraints.

Q: Are Panasonic EEU-TA1H331 and Vishay MAL213631331E3 truly equivalent to UKL1H331MHD? A: Both are functionally equivalent with identical capacitance, voltage, tolerance, and mechanical dimensions (5.00 mm lead spacing, 12.50 mm diameter). EEU-TA1H331 offers 2000 Hrs @ 125°C lifetime, while Vishay parts provide 7000 Hrs @ 105°C. Both are Active status from established manufacturers with ROHS3 compliance.

Q: Why does UPS1J331MHD have a different voltage rating (63 V vs. 50 V)? A: UPS1J331MHD is a higher voltage variant of the same capacitance value. It is suitable for applications requiring voltage margin above 50 V but maintains identical mechanical compatibility and lead spacing. This part is classified as "Not For New Designs."

Q: What does "Not For New Designs" status mean for the original UKL1H331MHD? A: This designation indicates the part has been superseded in Nichicon's product portfolio. While existing inventory remains available, the manufacturer recommends using Active status alternatives (such as UBT1H331MHD8 or URS1H331MHD) for new circuit designs to ensure long-term supply continuity and access to technical support.

Q: Can UKL1H331KHD (±10% tolerance) be used where UKL1H331MHD (±20% tolerance) is specified? A: Yes. UKL1H331KHD provides tighter tolerance (±10%) while maintaining all other electrical and mechanical specifications. This substitution improves capacitance accuracy without requiring design changes, though it may have different availability or cost implications.

Q: Are there mechanical compatibility concerns when switching between Nichicon UKL, UBT, UBW, and URS series? A: All listed Nichicon variants maintain 5.00 mm lead spacing and 12.50 mm case diameter. Height variations exist: URS1H331MHD (14.00 mm) is shorter than UKL1H331MHD (21.50 mm), while UBT and UBW variants are slightly taller (22.00 mm). PCB layout and clearance requirements must be verified for each substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message