Equivalent & Substitute Parts for UES1C331MHM

Part Overview

The UES1C331MHM is a 330 µF, 16 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 This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 or substitute parts is necessary for maintenance, repair, and legacy system support where the original specification must be maintained or upgraded within compatible electrical and mechanical parameters.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	16 V
Tolerance	±20%
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Size / Dimension	0.492" Dia (12.50 mm)
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 85°C
Polarization	Bi-Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UES1C331MHM is determined by the following criteria:

Fixed Parameters (Must Match):

Capacitance: 330 µF
Tolerance: ±20%
Package Type: Radial, Can
Lead Spacing: 0.197" (5.00 mm)
Size / Dimension: 0.492" Dia (12.50 mm)
Mounting Type: Through Hole
Polarization: Bi-Polar

Allowable Variations:

Voltage Rating: May be equal to or greater than 16 V (higher voltage ratings provide backward compatibility)
Operating Temperature Range: May be equal to or extended beyond -40°C ~ 85°C
Lifetime @ Temperature: May differ based on manufacturer specifications
ESR and Ripple Current: May vary within manufacturer tolerances

The three substitute parts listed below maintain identical capacitance, tolerance, package geometry, and lead spacing while offering equal or upgraded voltage ratings and thermal performance characteristics.

Parameter Comparison

Parameter	UES1C331MHM (Main)	UEP1E331MHD (Upgrade)	337BPS035M (Upgrade)	35NXA330MEFC12.5X20 (Upgrade)
Manufacturer	Nichicon	Nichicon	Cornell Dubilier / Illinois Capacitor	Rubycon
Series	UES	UEP	BPS	NXA
Capacitance	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage Rating	16 V	25 V	35 V	35 V
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Size / Dimension	0.492" Dia (12.50 mm)	0.492" Dia (12.50 mm)	0.492" Dia (12.50 mm)	0.492" Dia (12.50 mm)
Height - Seated (Max)	0.846" (21.50 mm)	0.866" (22.00 mm)	0.866" (22.00 mm)	0.866" (22.00 mm)
Operating Temperature	-40°C ~ 85°C	-55°C ~ 105°C	-40°C ~ 85°C	-55°C ~ 105°C
Lifetime @ Temp.	1000 Hrs @ 85°C	1000 Hrs @ 105°C	2000 Hrs @ 85°C	1000 Hrs @ 105°C
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Not For New Designs	Active	Active

Engineering Selection Recommendations

UEP1E331MHD (Nichicon UEP Series): This part maintains Nichicon manufacturer continuity while providing a 25 V voltage upgrade over the original 16 V rating. The extended operating temperature range (-55°C ~ 105°C) and higher temperature lifetime rating (1000 Hrs @ 105°C) offer improved thermal performance. However, this part retains "Not For New Designs" status. Height increase from 21.50 mm to 22.00 mm requires PCB layout verification.

337BPS035M (Cornell Dubilier / Illinois Capacitor BPS Series): This part provides the highest voltage rating at 35 V and the longest lifetime specification at 2000 Hrs @ 85°C. Product status is Active, indicating current manufacturing and long-term availability. Operating temperature range matches the original specification (-40°C ~ 85°C). Height increase to 22.00 mm requires PCB layout verification. ESR specification of 703 mOhm @ 120 Hz is provided.

35NXA330MEFC12.5X20 (Rubycon NXA Series): This part offers 35 V voltage rating with extended operating temperature range (-55°C ~ 105°C) and higher temperature lifetime rating (1000 Hrs @ 105°C). Product status is Active. Height increase to 22.00 mm requires PCB layout verification. Ripple current specification of 343 mA @ 120 Hz is provided.

All substitute parts maintain identical capacitance, tolerance, lead spacing, and package footprint. Selection should be based on voltage margin requirements, thermal environment, long-term availability needs, and PCB height constraints.

Frequently Asked Questions (FAQ)

Q: Can UEP1E331MHD be used as a direct replacement for UES1C331MHM?

A: UEP1E331MHD maintains identical capacitance (330 µF), tolerance (±20%), lead spacing (5.00 mm), and radial can package. The 25 V rating is compatible with 16 V applications. Height increases from 21.50 mm to 22.00 mm; verify PCB clearance before substitution.

Q: What is the primary difference between the three substitute options?

A: All three maintain 330 µF capacitance and identical lead spacing. UEP1E331MHD provides Nichicon continuity with 25 V rating. 337BPS035M offers the longest lifetime (2000 Hrs @ 85°C) and Active product status. 35NXA330MEFC12.5X20 provides extended temperature range (-55°C ~ 105°C) and Active product status.

Q: Does the height increase from 21.50 mm to 22.00 mm affect PCB compatibility?

A: The 0.50 mm height increase must be evaluated against PCB layout constraints, component clearance, and enclosure dimensions. Verify available vertical space before selecting substitute parts with the larger height specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. UES1C331MHM, UEP1E331MHD, 337BPS035M, and 35NXA330MEFC12.5X20 are all ROHS3 Compliant.

Q: Which substitute part offers the best long-term availability?

A: 337BPS035M and 35NXA330MEFC12.5X20 both carry Active product status, indicating current manufacturing and ongoing availability. UEP1E331MHD retains "Not For New Designs" status, similar to the original part.

Q: Can higher voltage-rated capacitors be used in lower voltage applications?

A: Yes. A 25 V or 35 V rated capacitor functions correctly in a 16 V application. The higher voltage rating provides additional safety margin and does not degrade performance in lower voltage circuits.

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