UHD1H331MPD Equivalent & Substitute Parts

Part Overview

The UHD1H331MPD is a 330 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product line. The UHD series offers a 4000-hour lifetime rating at 105°C, making it suitable for general-purpose applications requiring moderate operational longevity. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate procurement alternatives, and enable transitions to active product lines with improved performance characteristics or extended operational life.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	50 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)
Operating Temperature Range	-40°C to 105°C
Lifetime @ 105°C	4000 Hours
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UHD1H331MPD is determined by strict adherence to the following parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF
Voltage Rating: 50 V or higher
Tolerance: ±20%
Polarization: Polar

Core Mechanical Parameters (Non-Negotiable):

Package Type: Radial, Can
Mounting Type: Through Hole
Lead Spacing: 0.197" (5.00 mm)
Diameter: 0.394" (10.00 mm)

Performance Parameters (Allowable Variation):

Height: Seated height may vary within physical constraints of radial can packages
Lifetime @ 105°C: May be equal to or exceed 4000 hours
Operating Temperature Range: Must encompass -40°C to 105°C minimum
Impedance: May vary based on series design
Ripple Current: May vary based on series design

Substitutes are grouped into three categories: direct equivalents (same voltage rating), upgrades with extended lifetime (same voltage, improved durability), and upgrades with higher voltage rating (63 V, providing additional safety margin).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Height (Max)	Impedance	Product Status
UHD1H331MPD	Nichicon	330 µF	50 V	±20%	4000 Hrs	1.063" (27.00 mm)	28 mOhms	Not For New Designs
UHE1H331MPD	Nichicon	330 µF	50 V	±20%	7000 Hrs	0.984" (25.00 mm)	55 mOhms	Not For New Designs
EEU-FM1H331L	Panasonic	330 µF	50 V	±20%	5000 Hrs	1.063" (27.00 mm)	22 mOhms	Active
EEU-FR1H331L	Panasonic	330 µF	50 V	±20%	10000 Hrs	1.063" (27.00 mm)	22 mOhms	Active
EEU-FS1H331	Panasonic	330 µF	50 V	±20%	10000 Hrs	0.866" (22.00 mm)	23 mOhms	Active
EKZE500ELL331MJ25S	Chemi-Con	330 µF	50 V	±20%	4000 Hrs	1.043" (26.50 mm)	28 mOhms	Active
EKZM500ELL331MJ25S	Chemi-Con	330 µF	50 V	±20%	10000 Hrs	1.043" (26.50 mm)	28 mOhms	Active
337KBM050MGJD	Cornell Dubilier	330 µF	50 V	±20%	7000 Hrs	1.063" (27.00 mm)	55 mOhms	Active
337KXM050M	Cornell Dubilier	330 µF	50 V	±20%	4000 Hrs	1.063" (27.00 mm)	85 mOhms	Active
63ZLJ330M10X25	Rubycon	330 µF	63 V	±20%	10000 Hrs	1.063" (27.00 mm)	46 mOhms	Active
EKYA630ELL331MJ25S	Chemi-Con	330 µF	63 V	±20%	7000 Hrs	1.043" (26.50 mm)	46 mOhms	Active

Engineering Selection Recommendations

Direct Equivalents (50 V Rating): Parts meeting identical electrical and mechanical specifications are UHE1H331MPD (Nichicon), EEU-FM1H331L (Panasonic), EKZE500ELL331MJ25S (Chemi-Con), and 337KXM050M (Cornell Dubilier). All maintain 330 µF capacitance, 50 V rating, ±20% tolerance, radial can package, and through-hole mounting with 5.00 mm lead spacing. Selection among these should prioritize active product status: EEU-FM1H331L, EKZE500ELL331MJ25S, and 337KXM050M are all active products, whereas UHE1H331MPD is Not For New Designs.

Extended Lifetime Options (50 V Rating): EEU-FR1H331L (Panasonic) and EKZM500ELL331MJ25S (Chemi-Con) provide 10000-hour lifetime ratings at 105°C, double that of the UHD1H331MPD. Both are active products with identical electrical specifications and compatible mechanical dimensions. EEU-FS1H331 (Panasonic) also offers 10000-hour lifetime but with reduced seated height of 0.866" (22.00 mm), suitable for space-constrained applications.

Higher Voltage Upgrades (63 V Rating): 63ZLJ330M10X25 (Rubycon) and EKYA630ELL331MJ25S (Chemi-Con) provide 63 V rating with 330 µF capacitance, offering increased voltage margin for applications experiencing transient overvoltage. Both are active products with 10000-hour and 7000-hour lifetime ratings respectively. These are suitable only where circuit design permits higher voltage components without performance degradation.

Compliance Considerations: All listed substitutes maintain ROHS3 compliance. Panasonic parts (EEU series) are REACH Unaffected, while Nichicon, Chemi-Con, Cornell Dubilier, and Rubycon parts are REACH Affected. Selection should account for supply chain compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute UHD1H331MPD with a 50 V rated part of different height?

A: Height variation is permissible within the constraints of radial can package design. Parts with seated heights ranging from 0.866" to 1.063" are mechanically compatible provided lead spacing (5.00 mm) and diameter (10.00 mm) remain constant. Verify PCB layout clearance before substitution.

Q: What is the difference between direct equivalents and upgrades?

A: Direct equivalents maintain identical voltage rating (50 V) and lifetime specifications. Upgrades either extend lifetime (10000 hours vs. 4000 hours at 105°C) or increase voltage rating (63 V vs. 50 V). Upgrades are backward-compatible but may introduce different impedance or ripple current characteristics.

Q: Are 63 V rated parts suitable as drop-in replacements?

A: 63 V parts are electrically compatible in circuits designed for 50 V operation, as they meet or exceed all electrical requirements. However, they are not true drop-in replacements; they represent design upgrades. Use only where circuit analysis confirms no adverse effects from higher voltage-rated components.

Q: Why do some substitutes have different impedance values?

A: Impedance variation results from differences in internal construction, lead design, and manufacturing processes across manufacturers and series. While impedance affects high-frequency ripple current handling, all listed parts meet the electrical specifications required for 330 µF, 50 V general-purpose applications.

Q: Which substitute offers the best reliability for long-term operation?

A: Parts with 10000-hour lifetime ratings at 105°C (EEU-FR1H331L, EEU-FS1H331, EKZM500ELL331MJ25S, 63ZLJ330M10X25) provide extended operational life. Selection should align with application duty cycle and expected service life requirements.

Q: Are all substitutes available in the same packaging format?

A: All listed substitutes are supplied in radial, can package with through-hole mounting and 5.00 mm lead spacing. Packaging format (Bulk) is consistent across all parts. Verify specific packaging requirements with supplier documentation.

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