UHD1E331MPD Equivalent & Substitute Parts

Part Overview

The UHD1E331MPD is a 330 µF, 25 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 This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. The part delivers 4000 hours of operational life at 105°C with a ±20% capacitance tolerance and is suitable for general-purpose applications requiring through-hole mounting.

Locating equivalent and substitute parts is necessary due to the product's discontinued status for new designs. Alternative components with identical or superior electrical characteristics and compatible physical dimensions enable continued circuit functionality while maintaining design reliability.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ 105°C	4000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.551" (14.00 mm)
Mounting Type	Through Hole
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UHD1E331MPD is determined by the following criteria:

Primary Compatibility Requirements:

Capacitance value: 330 µF (exact match required)
Voltage rating: 25 V minimum (equal or higher acceptable)
Tolerance: ±20% (matching or tighter tolerance acceptable)
Mounting type: Through Hole (radial configuration)
Lead spacing: 0.197" (5.00 mm) preferred for direct PCB compatibility
Case diameter: 0.394" (10.00 mm) preferred for mechanical fit
Height: 0.551" (14.00 mm) or less for space-constrained applications

Acceptable Variations:

Lifetime rating: 4000 hours or greater at 105°C
Operating temperature range: Must encompass -40°C to 105°C minimum
Ripple current capability: Equal or superior performance acceptable
Impedance: Lower values indicate improved high-frequency performance

Substitute parts are grouped into two categories: Nichicon series alternatives (same manufacturer, different series) and cross-manufacturer alternatives (Rubycon, Cornell Dubilier / Illinois Capacitor).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Case Diameter	Height (Max)	Impedance	Product Status
UHD1E331MPD6	Nichicon	330 µF	25 V	4000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	53 mOhms	Not For New Designs
UHV1V331MPD	Nichicon	330 µF	35 V	6000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	43 mOhms	Not For New Designs
UHD1E331MPD	Nichicon	330 µF	25 V	3000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.650" (16.50 mm)	56 mOhms	Not For New Designs
UHE1E331MPD	Nichicon	330 µF	25 V	7000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.591" (15.00 mm)	87 mOhms	Not For New Designs
UHE1E331MPD6	Nichicon	330 µF	25 V	7000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.492" (12.50 mm)	80 mOhms	Not For New Designs
UHV1E331MPD	Nichicon	330 µF	25 V	6000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.512" (13.00 mm)	59 mOhms	Not For New Designs
UTT1E331MPD	Nichicon	330 µF	25 V	5000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.453" (11.50 mm)	400 mOhms	Obsolete
25YXF330MEFC10X12.5	Rubycon	330 µF	25 V	7000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	160 mOhms	Not For New Designs
25YXG330MEFC10X12.5	Rubycon	330 µF	25 V	5000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	80 mOhms	Not For New Designs
25YXH330MEFC10X12.5	Rubycon	330 µF	25 V	7000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	80 mOhms	Last Time Buy
337KXM025MLN	Cornell Dubilier / Illinois Capacitor	330 µF	25 V	4000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	170 mOhms	Active

Engineering Selection Recommendations

Direct Mechanical and Electrical Compatibility (Preferred):

UHE1E331MPD6 and UHV1V331MPD are the primary substitutes for UHD1E331MPD. Both maintain identical lead spacing (0.197", 5.00 mm), case diameter (0.394", 10.00 mm), and mounting height within acceptable limits. UHE1E331MPD6 matches the 25 V voltage rating with extended lifetime (7000 hours versus 4000 hours), while UHV1V331MPD provides voltage derating margin at 35 V with improved impedance characteristics (43 mOhms versus 53 mOhms).

Alternative Nichicon Series:

UHV1E331MPD and UHE1E331MPD offer equivalent electrical performance but feature reduced lead spacing (0.138", 4.60 mm) and smaller case diameter (0.315", 8.00 mm). These parts are suitable only for applications where PCB layout accommodates the tighter lead pitch and reduced footprint.

Cross-Manufacturer Alternatives:

Rubycon 25YXF330MEFC10X12.5, 25YXG330MEFC10X12.5, and 25YXH330MEFC10X12.5 provide identical mechanical compatibility with matching lead spacing, case diameter, and height. All three are ROHS3 compliant. The 25YXH330MEFC10X12.5 carries Last Time Buy status, indicating limited future availability.

Active Product Option:

337KXM025MLN (Cornell Dubilier / Illinois Capacitor) is the only active product in this substitution group. It maintains full mechanical compatibility and ROHS3 compliance. The impedance value (170 mOhms) is higher than the original part, which may affect high-frequency ripple current performance in noise-sensitive applications.

Product Status Considerations:

All Nichicon and Rubycon alternatives carry Not For New Designs or Last Time Buy status. The 337KXM025MLN maintains Active status, making it the recommended choice for long-term design continuity and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can UHE1E331MPD6 directly replace UHD1E331MPD without PCB modification?

A: Yes. Both parts share identical lead spacing (0.197", 5.00 mm), case diameter (0.394", 10.00 mm), and mounting height within acceptable tolerance (0.492" versus 0.551"). No PCB layout changes are required.

Q: What is the difference between UHV1V331MPD and UHV1E331MPD?

A: UHV1V331MPD is rated at 35 V with 6000-hour lifetime, while UHV1E331MPD is rated at 25 V with 6000-hour lifetime. Both share identical physical dimensions. The 35 V rating provides voltage derating margin for applications operating near the 25 V limit.

Q: Why does 337KXM025MLN have higher impedance than the original part?

A: Impedance variation reflects differences in internal construction and manufacturing process between manufacturers. The 337KXM025MLN impedance of 170 mOhms remains within acceptable range for general-purpose applications but may increase ripple current heating in high-frequency switching circuits.

Q: Are Rubycon parts fully compatible with the original Nichicon design?

A: Yes. The Rubycon 25YXF330MEFC10X12.5, 25YXG330MEFC10X12.5, and 25YXH330MEFC10X12.5 maintain identical electrical specifications (330 µF, 25 V, ±20% tolerance) and physical dimensions (lead spacing, case diameter, height). All are ROHS3 compliant.

Q: Which substitute offers the longest operational lifetime?

A: UHE1E331MPD6, 25YXF330MEFC10X12.5, and 25YXH330MEFC10X12.5 all provide 7000-hour lifetime at 105°C, compared to 4000 hours for the original UHD1E331MPD.

Q: Is the 337KXM025MLN suitable for high-frequency applications?

A: The 337KXM025MLN impedance of 170 mOhms is higher than alternatives. For applications requiring low impedance at high frequencies (100 kHz and above), UHE1E331MPD6 (80 mOhms) or 25YXG330MEFC10X12.5 (80 mOhms) are preferred.

Q: What is the significance of Last Time Buy status on 25YXH330MEFC10X12.5?

A: Last Time Buy indicates the manufacturer will discontinue production after a specified date. Existing inventory remains available, but future procurement may not be possible. For new designs requiring long-term supply assurance, 337KXM025MLN (Active status) is recommended.

Q: Can parts with different lead spacing be used interchangeably?

A: No. UHD1E331MPD features 0.197" (5.00 mm) lead spacing. Parts with 0.138" (4.60 mm) spacing (UHV1E331MPD, UHE1E331MPD, UTT1E331MPD) require PCB redesign and cannot be used as direct substitutes without layout modification.

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