Nichicon UTT1C331MPD 330µF 16V Radial Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon UTT1C331MPD is a 330µF 16V radial aluminum electrolytic capacitor rated for 5000 hours at 105°C. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The UTT series represents an earlier generation of general-purpose aluminum electrolytic capacitors with through-hole radial mounting. Identifying compatible substitutes requires matching the core electrical specifications (capacitance, voltage rating, tolerance) and mechanical form factor while accounting for differences in lifetime ratings, ripple current handling, and impedance characteristics.

Key Parameters

Parameter	UTT1C331MPD
Capacitance	330 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ 105°C	5000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Through Hole
Package / Case	Radial, Can
Lead Spacing	0.138" (4.60mm)
Size / Dimension	0.315" Dia (8.00mm)
Height - Seated (Max)	0.354" (9.00mm)
Ripple Current @ 120 Hz	138 mA
Ripple Current @ 100 kHz	230 mA
Impedance	680 mOhms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UTT1C331MPD is determined by strict adherence to the following parameters:

Primary Matching Criteria (Non-Negotiable):

Capacitance: 330 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±20% (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.138" (4.60mm) (exact match required)
Size / Dimension: 0.315" Dia (8.00mm) (exact match required)

Secondary Parameters (Allow Variation Within Functional Limits):

Lifetime @ 105°C: May vary; higher ratings provide extended service life
Height - Seated (Max): Limited variation acceptable if PCB clearance permits
Ripple Current: Higher values indicate improved performance
Impedance: Lower values indicate better high-frequency performance
Operating Temperature Range: May extend beyond original specification

Substitute parts are grouped into two categories: direct Nichicon series replacements (UPW, UHD, UHE, UHV) and cross-manufacturer alternatives (Panasonic EEU-FM series, Chemi-Con EKZE series). All listed substitutes maintain the core electrical and mechanical specifications required for direct board-level replacement.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Height (Max)	Ripple Current @ 120 Hz	Impedance	Product Status
UTT1C331MPD	Nichicon	330 µF	16 V	±20%	5000 Hrs	0.138" (4.60mm)	0.354" (9.00mm)	138 mA	680 mOhms	Obsolete
UPW1C331MPD	Nichicon	330 µF	16 V	±20%	3000 Hrs	0.138" (4.60mm)	0.453" (11.50mm)	360.75 mA	117 mOhms	Not For New Designs
RL81C331MDN1	Nichicon	330 µF	16 V	±20%	2000 Hrs	0.138" (4.60mm)	0.354" (9.00mm)	500 mA	12 mOhms	Active
UCW1C331MNL1GS	Nichicon	330 µF	16 V	±20%	7000 Hrs	N/A (SMD)	0.394" (10.00mm)	300 mA	220 mOhms	Active
UHD1C331MPD	Nichicon	330 µF	16 V	±20%	3000 Hrs	0.138" (4.60mm)	0.512" (13.00mm)	532 mA	72 mOhms	Not For New Designs
UHE1C331MPD	Nichicon	330 µF	16 V	±20%	7000 Hrs	0.138" (4.60mm)	0.453" (11.50mm)	448 mA	130 mOhms	Not For New Designs
UHV1C331MPD	Nichicon	330 µF	16 V	±20%	6000 Hrs	0.138" (4.60mm)	0.512" (13.00mm)	415 mA	59 mOhms	Not For New Designs
EEU-FM1C331	Panasonic	330 µF	16 V	±20%	3000 Hrs	0.138" (4.60mm)	0.512" (13.00mm)	665 mA	56 mOhms	Active
EEU-FM1C331B	Panasonic	330 µF	16 V	±20%	3000 Hrs	0.197" (5.00mm)	0.512" (13.00mm)	665 mA	56 mOhms	Active
EEU-FM1C331BJ	Panasonic	330 µF	16 V	±20%	3000 Hrs	0.197" (5.00mm)	0.512" (13.00mm)	665 mA	56 mOhms	Active
EKZE160ELL331MHB5D	Chemi-Con	330 µF	16 V	±20%	3000 Hrs	0.138" (4.60mm)	0.512" (13.00mm)	380 mA	72 mOhms	Active

Engineering Selection Recommendations

For Direct Replacement (Minimum Height Constraint):

The RL81C331MDN1 (Nichicon polymer type) and EKZE160ELL331MHB5D (Chemi-Con) maintain the original 0.354" (9.00mm) seated height, enabling installation in space-constrained PCB layouts. RL81C331MDN1 is active and offers superior ripple current handling (500 mA @ 120 Hz) and lowest impedance (12 mOhms) among all substitutes, making it optimal for high-ripple applications. EKZE160ELL331MHB5D is also active and provides balanced performance with 380 mA ripple current and 72 mOhms impedance.

For Extended Lifetime Applications:

UHE1C331MPD and UHV1C331MPD provide 7000 and 6000 hour ratings respectively at 105°C, compared to the original 5000 hours. Both are classified as "Not For New Designs" but remain available. UHE1C331MPD offers 448 mA ripple current; UHV1C331MPD provides superior impedance at 59 mOhms.

For Active Production (Recommended):

EEU-FM1C331 (Panasonic, active status) delivers the lowest impedance (56 mOhms) and highest ripple current (665 mA @ 120 Hz) among all substitutes. Lead spacing is 0.138" (4.60mm), matching the original. Height is 0.512" (13.00mm), requiring PCB clearance verification. EEU-FM1C331B and EEU-FM1C331BJ are identical electrically but feature 0.197" (5.00mm) lead spacing for wider PCB pad layouts.

For Surface Mount Applications:

UCW1C331MNL1GS (Nichicon, active) is the only SMD option, rated for 7000 hours at 105°C. This part is not a direct through-hole replacement but serves applications requiring surface-mount technology.

All recommended substitutes are ROHS3 compliant and maintain the 16V / 330µF / ±20% core specification.

Frequently Asked Questions (FAQ)

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

A: Lead spacing substitution requires PCB redesign. The original UTT1C331MPD specifies 0.138" (4.60mm) lead spacing. Panasonic EEU-FM1C331B and EEU-FM1C331BJ feature 0.197" (5.00mm) spacing and are not pin-compatible without PCB modification. Verify PCB pad layout before selecting a substitute with different lead spacing.

Q: What is the impact of different height specifications?

A: The original part is 0.354" (9.00mm) seated height. Substitutes range from 0.354" to 0.512" (13.00mm). Taller components may interfere with PCB-mounted components, shielding, or enclosure clearance. Verify vertical clearance on the target PCB before selecting a taller substitute.

Q: Why do some substitutes have lower lifetime ratings?

A: Lifetime ratings (measured in hours at 105°C) reflect capacitor aging characteristics. UPW1C331MPD (3000 Hrs) and RL81C331MDN1 (2000 Hrs) have lower ratings than the original (5000 Hrs). Lower lifetime ratings may be acceptable for non-critical applications or shorter product lifecycles. For long-term reliability requirements, select UHE1C331MPD (7000 Hrs) or UHV1C331MPD (6000 Hrs).

Q: What does impedance mean, and why does it vary?

A: Impedance (ESR equivalent series resistance) measures capacitor resistance at high frequencies. Lower impedance indicates better high-frequency performance and lower heat generation under ripple current stress. RL81C331MDN1 (12 mOhms) and EEU-FM1C331 (56 mOhms) offer superior impedance compared to the original (680 mOhms), improving performance in switching power supplies and high-frequency circuits.

Q: Can I use the SMD part UCW1C331MNL1GS as a replacement?

A: No. UCW1C331MNL1GS is a surface-mount device (SMD) with different land pattern and mounting method. It is not compatible with through-hole PCB designs. Use only for new designs requiring SMD technology.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant, matching the original part's environmental certification status.

Q: Which substitute offers the best overall performance?

A: Selection depends on application requirements. RL81C331MDN1 excels in ripple current handling (500 mA @ 120 Hz) and impedance (12 mOhms) with matching height. EEU-FM1C331 offers the lowest impedance (56 mOhms) and highest ripple current (665 mA @ 120 Hz) but requires height clearance verification. UHE1C331MPD provides the longest lifetime (7000 Hrs) among Nichicon options.

Q: What is the difference between Nichicon, Panasonic, and Chemi-Con parts?

A: All three manufacturers produce aluminum electrolytic capacitors meeting the same core specifications (330µF, 16V, ±20%). Differences lie in series design, lifetime ratings, ripple current handling, and impedance characteristics. Panasonic EEU-FM series and Chemi-Con EKZE series are cross-manufacturer alternatives offering active product status and competitive performance metrics.

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