Equivalent & Substitute Parts for UPS1E331MPD

Part Overview

The UPS1E331MPD 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 This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Finding equivalent and substitute parts is necessary for maintenance, repair, and legacy system support where original components may no longer be readily available or where design improvements warrant component upgrades.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package	Radial, Can
Lead Spacing	0.197" (5.00mm)
Diameter	0.394" (10.00mm)
Height	0.551" (14.00mm)

Substitute Part Grouping Explanation

Substitution eligibility for the UPS1E331MPD is determined by the following critical parameters:

Primary Matching Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 25 V minimum (equal or higher acceptable)
Polarization: Polar (required)
Mounting Type: Through Hole (required)
Package: Radial, Can (required)

Secondary Compatibility Factors:

Lead Spacing: 0.197" (5.00mm) preferred for direct PCB fit
Physical Dimensions: Diameter 0.394" (10.00mm) and Height 0.551" (14.00mm) preferred to avoid mechanical interference
Lifetime Rating: 2000 Hrs @ 105°C or higher acceptable for improved reliability
Operating Temperature: -55°C ~ 105°C (standard range)

Substitute parts are grouped into three categories:

Direct Substitutes (Same Voltage, Same Lead Spacing): Parts maintaining 25 V rating and 5.00mm lead spacing with identical or improved electrical characteristics.

Upgraded Substitutes (Higher Voltage Rating): Parts with 35 V rating providing enhanced voltage margin while maintaining 330 µF capacitance and compatible physical form factors.

Similar Substitutes (Alternate Lead Spacing): Parts with 4.60mm lead spacing requiring PCB layout verification but offering improved electrical performance or extended lifetime ratings.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Diameter	Height	Impedance	Product Status
UPS1E331MPD	Nichicon	330 µF	25 V	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	190 mOhms	Not For New Designs
UPW1E331MPD	Nichicon	330 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.492" (12.50mm)	90 mOhms	Not For New Designs
UKA1V331MPD	Nichicon	330 µF	35 V	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	—	Not For New Designs
UPJ1E331MPD	Nichicon	330 µF	25 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.827" (21.00mm)	130 mOhms	Not For New Designs
UPJ1E331MPD6	Nichicon	330 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.650" (16.50mm)	150 mOhms	Not For New Designs
UPM1E331MPD	Nichicon	330 µF	25 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.846" (21.50mm)	85 mOhms	Not For New Designs
UPM1E331MPD6	Nichicon	330 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.669" (17.00mm)	95 mOhms	Not For New Designs
UPW1E331MPD6	Nichicon	330 µF	25 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.591" (15.00mm)	85 mOhms	Active
337KXM025MLN	Cornell Dubilier / Illinois Capacitor	330 µF	25 V	4000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	170 mOhms	Active
337RZM025M1013	Cornell Dubilier / Illinois Capacitor	330 µF	25 V	3000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	360 mOhms	Active
35PX330MEFC10X12.5	Rubycon	330 µF	35 V	2000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	—	Active

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification):

UPW1E331MPD and UPM1E331MPD6 are preferred direct substitutes. Both maintain the 0.197" (5.00mm) lead spacing and 0.394" (10.00mm) diameter of the original UPS1E331MPD. UPW1E331MPD offers extended lifetime (5000 Hrs @ 105°C) with lower impedance (90 mOhms) and slightly reduced height (0.492" vs 0.551"), providing improved electrical performance without PCB layout changes. UPM1E331MPD6 similarly extends lifetime to 5000 Hrs with comparable impedance (95 mOhms) and is rated AEC-Q200 for automotive applications.

For Active Product Status:

UPW1E331MPD6 is the only Nichicon part in this substitution set with Active product status, ensuring continued availability and manufacturing support. It operates at 3000 Hrs @ 105°C with 85 mOhms impedance and uses 0.138" (4.60mm) lead spacing, requiring PCB verification.

337KXM025MLN (Cornell Dubilier / Illinois Capacitor) and 337RZM025M1013 (Cornell Dubilier / Illinois Capacitor) are Active products providing alternative sourcing from established manufacturers. Both maintain identical lead spacing and physical dimensions to the original part. 337KXM025MLN offers 4000 Hrs lifetime with 170 mOhms impedance. 337RZM025M1013 provides 3000 Hrs lifetime but exhibits higher impedance (360 mOhms).

For Voltage Margin Enhancement:

UKA1V331MPD and 35PX330MEFC10X12.5 provide 35 V rating while maintaining 330 µF capacitance and identical lead spacing (0.197" / 5.00mm). Both are suitable where increased voltage headroom is required. UKA1V331MPD is a Nichicon product; 35PX330MEFC10X12.5 is manufactured by Rubycon and carries Active status.

For Alternate Lead Spacing (PCB Layout Dependent):

UPJ1E331MPD, UPJ1E331MPD6, UPM1E331MPD, and UPW1E331MPD6 use 0.138" (4.60mm) lead spacing. These parts require verification that PCB pad spacing accommodates the narrower lead pitch. UPJ1E331MPD6 and UPM1E331MPD6 extend lifetime to 5000 Hrs. UPW1E331MPD6 is the only Active product in this group.

Frequently Asked Questions (FAQ)

Q: Can I use a 35 V rated capacitor in place of the 25 V UPS1E331MPD?

A: Yes. UKA1V331MPD and 35PX330MEFC10X12.5 are electrically compatible substitutes with higher voltage ratings. The 35 V rating provides additional voltage margin without affecting circuit operation at 25 V. Both parts maintain identical lead spacing (0.197" / 5.00mm) and physical dimensions (0.394" diameter, 0.551" height) as the original.

Q: What is the difference between parts with 0.197" and 0.138" lead spacing?

A: Lead spacing determines the distance between component leads on the PCB. The original UPS1E331MPD uses 0.197" (5.00mm) spacing. Parts with 0.138" (4.60mm) spacing have leads positioned closer together. Direct substitution requires matching lead spacing unless PCB pads are modified. Verify pad spacing before selecting alternate lead pitch parts.

Q: Which substitute offers the longest operational lifetime?

A: UPW1E331MPD, UPJ1E331MPD6, and UPM1E331MPD6 all provide 5000 Hrs @ 105°C lifetime, compared to the original 2000 Hrs. These extended-life parts improve system reliability in applications with continuous thermal stress.

Q: Are there Active product alternatives to the obsolete UPS1E331MPD?

A: Yes. UPW1E331MPD6 (Nichicon, Active status) is available with 3000 Hrs @ 105°C lifetime. 337KXM025MLN and 337RZM025M1013 (Cornell Dubilier / Illinois Capacitor, both Active) provide alternative sourcing with identical lead spacing and physical form factors. These ensure long-term component availability.

Q: What does "Not For New Designs" status mean?

A: This designation indicates the manufacturer has discontinued the part for new product development. Existing inventory may remain available for legacy system support and repairs, but the part is no longer recommended for new circuit designs. Active-status alternatives should be prioritized for new applications.

Q: How do I verify physical fit before substitution?

A: Compare three dimensions: lead spacing (distance between component leads), diameter (can size), and height (seated length). The original UPS1E331MPD specifies 0.197" lead spacing, 0.394" diameter, and 0.551" height. Direct substitutes maintain these dimensions. Parts with different lead spacing or height require PCB layout verification to confirm clearance and pad alignment.

Q: What is impedance and why does it vary among substitutes?

A: Impedance is the total opposition to current flow at a given frequency. Lower impedance indicates better high-frequency performance and reduced voltage ripple. The original UPS1E331MPD has 190 mOhms impedance. Substitutes range from 85 mOhms (UPM1E331MPD, UPW1E331MPD6) to 360 mOhms (337RZM025M1013). Lower impedance substitutes provide improved filtering characteristics.

Q: Can I substitute based on capacitance and voltage alone?

A: No. Capacitance and voltage are necessary but insufficient criteria. Lead spacing, physical dimensions, and mounting type must also match to ensure PCB compatibility. Lifetime rating, impedance, and ripple current specifications should be evaluated based on application requirements. Always verify all parameters before substitution.

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