Equivalent & Substitute Parts for UTT1E331MPD

Part Overview

The UTT1E331MPD is a 330 µF, 25 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing applications. The original series offers a 5000-hour lifetime rating at 105°C with general-purpose applications in through-hole mounting configurations.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.138" (4.60mm) or 0.197" (5.00mm)
Can Diameter	0.315" (8.00mm) or 0.394" (10.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the UTT1E331MPD is determined by strict equivalence in the following parameters:

Electrical Match: Capacitance (330 µF), voltage rating (25 V), and tolerance (±20%) must be identical
Mechanical Compatibility: Lead spacing and can diameter must accommodate the original PCB layout
Thermal Performance: Operating temperature range must support the application environment
Regulatory Compliance: RoHS3 compliance required for all substitutes

Substitute parts are grouped into two categories based on lead spacing and can diameter:

Group A (0.138" lead spacing, 0.315" diameter): UPW1E331MPD6, UHD1E331MPD, UHE1E331MPD, UHV1E331MPD, EEU-FM1E331L

Group B (0.197" lead spacing, 0.394" diameter): UHE1E331MPD6, EEU-FM1E331, EEU-FM1E331B, EEU-FM1E331LB, EEU-FM1E331LBJ

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Can Diameter	Height (Max)	Product Status	Impedance
UTT1E331MPD	Nichicon	330 µF	25 V	±20%	5000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.453" (11.50mm)	Obsolete	400 mOhms
UPW1E331MPD6	Nichicon	330 µF	25 V	±20%	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.591" (15.00mm)	Active	85 mOhms
UHD1E331MPD	Nichicon	330 µF	25 V	±20%	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.650" (16.50mm)	Not For New Designs	56 mOhms
UHE1E331MPD	Nichicon	330 µF	25 V	±20%	7000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.591" (15.00mm)	Not For New Designs	87 mOhms
UHE1E331MPD6	Nichicon	330 µF	25 V	±20%	7000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.492" (12.50mm)	Not For New Designs	80 mOhms
UHV1E331MPD	Nichicon	330 µF	25 V	±20%	6000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	Not For New Designs	59 mOhms
EEU-FM1E331	Panasonic	330 µF	25 V	±20%	4000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	Active	38 mOhms
EEU-FM1E331B	Panasonic	330 µF	25 V	±20%	4000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	Active	38 mOhms
EEU-FM1E331L	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.650" (16.50mm)	Active	41 mOhms
EEU-FM1E331LB	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.197" (5.00mm)	0.315" (8.00mm)	0.650" (16.50mm)	Active	41 mOhms
EEU-FM1E331LBJ	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.197" (5.00mm)	0.315" (8.00mm)	0.650" (16.50mm)	Active	41 mOhms

Engineering Selection Recommendations

For Active Production (Preferred)

UPW1E331MPD6 (Nichicon) is the manufacturer-recommended active substitute. It maintains identical electrical specifications and mechanical compatibility with 0.138" lead spacing and 0.315" can diameter. Although lifetime is reduced to 3000 hours compared to the original 5000 hours, this part is actively manufactured and carries full RoHS3 compliance.

Panasonic EEU-FM series parts (EEU-FM1E331L, EEU-FM1E331LB, EEU-FM1E331LBJ) are active alternatives with 3000-hour lifetime ratings. These parts offer lower impedance characteristics and are available in both standard and cut-tape packaging options. Lead spacing and can diameter must be verified against PCB layout requirements.

For Extended Lifetime Applications

UHE1E331MPD and UHE1E331MPD6 (Nichicon) provide 7000-hour lifetime ratings at 105°C. These parts are classified as "Not For New Designs" but remain available. UHE1E331MPD maintains the original 0.138" lead spacing, while UHE1E331MPD6 uses 0.197" spacing with larger 0.394" can diameter.

UHV1E331MPD (Nichicon) offers 6000-hour lifetime with 0.138" lead spacing and 0.315" can diameter, providing intermediate performance between the original and extended-life options.

Regulatory Compliance

All substitute parts listed maintain ROHS3 compliance. Nichicon UHD1E331MPD and UHE series parts are subject to REACH regulations, while Panasonic EEU-FM series and Nichicon UPW1E331MPD6 are REACH-unaffected.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different lead spacing?

A: Lead spacing is a critical mechanical parameter. Substitutes with 0.197" (5.00mm) spacing cannot be used in designs requiring 0.138" (4.60mm) spacing without PCB modification. Verify lead spacing against your PCB layout before selection.

Q: What is the impact of reduced lifetime rating?

A: The original UTT1E331MPD provides 5000 hours at 105°C. Active substitutes such as UPW1E331MPD6 and EEU-FM series offer 3000 to 4000 hours. Extended-life alternatives (UHE1E331MPD, UHV1E331MPD) provide 6000 to 7000 hours. Lifetime selection depends on application duty cycle and expected service life requirements.

Q: Are there height clearance concerns?

A: Yes. The original part has a maximum seated height of 0.453" (11.50mm). Several substitutes exceed this dimension. UPW1E331MPD6, UHD1E331MPD, and EEU-FM1E331L reach 0.591" to 0.650" height. Verify clearance in your PCB assembly before selection.

Q: What is the difference between Nichicon and Panasonic alternatives?

A: Both manufacturers provide electrically equivalent 330 µF, 25 V capacitors with ±20% tolerance. Panasonic EEU-FM series parts offer lower impedance (38-41 mOhms) compared to Nichicon alternatives (56-400 mOhms), which may benefit ripple current performance. Nichicon parts provide longer lifetime options (up to 7000 hours).

Q: Can I substitute based on impedance alone?

A: No. Impedance is a performance characteristic but not a substitution criterion. Capacitance, voltage rating, tolerance, lead spacing, and can diameter are the primary substitution parameters. Impedance differences reflect manufacturing variations within the same electrical specification.

Q: What packaging options are available?

A: Panasonic EEU-FM1E331B and EEU-FM1E331LB are supplied in cut-tape (CT) packaging. Most other alternatives are supplied in bulk. Verify packaging requirements for your procurement and assembly processes.

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