UHN1C331MPD Equivalent & Substitute Parts

Part Overview

The UHN1C331MPD is a 330 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, indicating it is no longer in active production. Finding equivalent or substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for applications utilizing this capacitor specification.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	16 V
Tolerance	±20%
Package Type	Radial, Can
Lead Spacing	0.138" (4.60 mm)
Size / Dimension	0.315" Dia (8.00 mm)
Height - Seated (Max)	0.512" (13.00 mm)
Mounting Type	Through Hole
Polarization	Polar
Operating Temperature Range	-25°C ~ 105°C
Lifetime @ Temperature	2000 Hrs @ 105°C
Impedance	21 mOhms
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the UHN1C331MPD is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 16 V (or higher)
Tolerance: ±20%
Package Type: Radial, Can
Lead Spacing: 0.138" (4.60 mm)
Size / Dimension: 0.315" Dia (8.00 mm)
Height - Seated (Max): 0.512" (13.00 mm)
Mounting Type: Through Hole
Polarization: Polar

Acceptable Variations:

Operating Temperature Range: May be wider than the original -25°C ~ 105°C
Lifetime @ Temperature: May exceed 2000 Hrs @ 105°C
Impedance: May vary based on series design
Product Status: Active or Not For New Designs parts are acceptable alternatives

Substitute parts are grouped by manufacturer and series, with consideration for product status, compliance certifications, and thermal performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ Temp.	Operating Temp. Range	Impedance	Product Status	RoHS Status
UHN1C331MPD	Nichicon	UHN	330 µF	16 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	21 mOhms	Obsolete	REACH Unaffected
UHD1C331MPD	Nichicon	UHD	330 µF	16 V	±20%	3000 Hrs @ 105°C	-40°C ~ 105°C	72 mOhms	Not For New Designs	ROHS3 Compliant
UHV1C331MPD	Nichicon	UHV	330 µF	16 V	±20%	6000 Hrs @ 105°C	-40°C ~ 105°C	59 mOhms	Not For New Designs	ROHS3 Compliant
UHV1E331MPD	Nichicon	UHV	330 µF	25 V	±20%	6000 Hrs @ 105°C	-40°C ~ 105°C	59 mOhms	Not For New Designs	ROHS3 Compliant
UKA1C331MPD	Nichicon	UKA	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	—	Not For New Designs	ROHS3 Compliant
UKA1E331MPD	Nichicon	UKA	330 µF	25 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	—	Not For New Designs	ROHS3 Compliant
UPA1C331MPD	Nichicon	UPA	330 µF	16 V	±20%	3000 Hrs @ 105°C	-55°C ~ 105°C	90 mOhms	Active	ROHS3 Compliant
UPA1E331MPD	Nichicon	UPA	330 µF	25 V	±20%	3000 Hrs @ 105°C	-55°C ~ 105°C	90 mOhms	Active	ROHS3 Compliant
UPS1C331MPD	Nichicon	UPS	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	280 mOhms	Not For New Designs	ROHS3 Compliant
16RX30330M8X11.5	Rubycon	RX30	330 µF	16 V	±20%	2000 Hrs @ 130°C	-40°C ~ 130°C	220 mOhms	Active	ROHS3 Compliant
16YXF330MEFC8X11.5	Rubycon	YXF	330 µF	16 V	±20%	7000 Hrs @ 105°C	-40°C ~ 105°C	250 mOhms	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: UPA1C331MPD (Nichicon, Active Status)

The UPA1C331MPD is the preferred substitute. It maintains identical capacitance (330 µF), voltage rating (16 V), tolerance (±20%), and physical dimensions as the UHN1C331MPD. The UPA series offers extended lifetime (3000 Hrs @ 105°C versus 2000 Hrs), wider operating temperature range (-55°C ~ 105°C), and active product status ensuring continued availability. ROHS3 compliance and REACH Affected status meet modern regulatory requirements.

Secondary Recommendation: 16RX30330M8X11.5 (Rubycon, Active Status)

The Rubycon RX30 series part provides an alternative from a different manufacturer with active product status. It maintains all critical electrical and mechanical parameters. The RX30 series is rated for higher temperature operation (2000 Hrs @ 130°C) and includes AEC-Q200 automotive qualification, making it suitable for applications requiring enhanced thermal performance or automotive-grade reliability.

Alternative Options:

UHD1C331MPD (Nichicon UHD series): Extended lifetime (3000 Hrs @ 105°C), wider temperature range (-40°C ~ 105°C), but Not For New Designs status.
UHV1C331MPD (Nichicon UHV series): Maximum lifetime (6000 Hrs @ 105°C), but Not For New Designs status.
UKA1C331MPD (Nichicon UKA series): Audio-grade application focus, extended temperature range (-55°C ~ 105°C), but Not For New Designs status.

Voltage Upgrade Option:

If circuit design permits, UHV1E331MPD or UPA1E331MPD (25 V rating) provide additional voltage margin while maintaining identical physical form factor and capacitance. Both are direct mechanical and electrical upgrades with no board redesign required.

Frequently Asked Questions (FAQ)

Q: Can I use a 25 V rated capacitor in place of the 16 V UHN1C331MPD?

A: Yes. A higher voltage rating (25 V) is electrically compatible with a 16 V circuit. The capacitor will operate safely at lower stress levels. Physical dimensions remain identical, so no board modification is necessary. Examples include UHV1E331MPD and UPA1E331MPD.

Q: What is the difference between Nichicon and Rubycon substitutes?

A: Both manufacturers produce equivalent 330 µF, 16 V radial capacitors with identical physical dimensions and lead spacing. Rubycon's 16RX30330M8X11.5 includes AEC-Q200 automotive qualification and higher temperature rating (130°C). Selection depends on application requirements and supply chain availability.

Q: Why do some substitutes have "Not For New Designs" status?

A: This status indicates the manufacturer is phasing out the product line but parts remain available in inventory. These are acceptable substitutes for legacy system support or repair. For new product development, Active status parts (UPA1C331MPD, 16RX30330M8X11.5) are preferred.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitutes are ROHS3 compliant except the original UHN1C331MPD, which is REACH Unaffected. Modern substitutes meet current environmental and regulatory standards.

Q: Does impedance variation affect substitutability?

A: Impedance differences (ranging from 21 mOhms to 280 mOhms across the list) reflect different internal construction and series design. For general-purpose applications, impedance variation is acceptable. For high-frequency or noise-sensitive circuits, lower impedance options (UHV series at 59 mOhms) may provide performance

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