UPS1A331MPD Equivalent & Substitute Parts

Part Overview

The UPS1A331MPD is a 330 µF, 10 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is classified as "Not For New Designs," indicating it has been superseded in Nichicon's product portfolio. Finding equivalent or substitute parts is necessary for maintenance, repair, and legacy system support where original stock is unavailable or depleted.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.138" (4.60 mm)
Case Diameter	0.315" (8.00 mm)
Height (Seated Max)	0.512" (13.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the UPS1A331MPD is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 10 V or higher
Tolerance: ±20%
Polarization: Polar
Package Type: Radial, Can
Lead Spacing: 0.138" (4.60 mm)
Case Diameter: 0.315" (8.00 mm)

Allowable Variations:

Lifetime @ 105°C: 2000 Hrs or greater (extended lifetime is acceptable)
Height: Up to 0.512" (13.00 mm) maximum
Ripple current ratings may vary based on series design
Impedance may vary within series specifications

Substitute parts are grouped into two categories:

Upgrade Substitutes (Same voltage, enhanced or equivalent performance):

UKA1A331MPD (UKA series, 2000 Hrs, Audio application)
UKA1C331MPD (UKA series, 16 V rated, 2000 Hrs)
UKA1E331MPD (UKA series, 25 V rated, 2000 Hrs)
UPA1C331MPD (UPA series, 16 V rated, 3000 Hrs, Active status)
UPA1E331MPD (UPA series, 25 V rated, 3000 Hrs, Active status)
UPS1C331MPD (UPS series, 16 V rated, 2000 Hrs)
UPS1C331MPD1TD (UPS series, 16 V rated, Cut Tape packaging)

Similar Substitutes (Same voltage, different series characteristics):

UPM1A331MPD (UPM series, 3000 Hrs, Automotive rated AEC-Q200)
UPV1A331MGD (UPV series, 5000 Hrs, extended lifetime)
UPW1A331MPD (UPW series, 3000 Hrs, reduced height 0.453")

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Product Status	Lead Spacing	Height (Max)	Packaging
UPS1A331MPD	Nichicon	UPS	330 µF	10 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UKA1A331MPD	Nichicon	UKA	330 µF	10 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UKA1C331MPD	Nichicon	UKA	330 µF	16 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UKA1E331MPD	Nichicon	UKA	330 µF	25 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPA1C331MPD	Nichicon	UPA	330 µF	16 V	3000 Hrs	Active	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPA1E331MPD	Nichicon	UPA	330 µF	25 V	3000 Hrs	Active	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPS1C331MPD	Nichicon	UPS	330 µF	16 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPS1C331MPD1TD	Nichicon	UPS	330 µF	16 V	2000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Cut Tape (CT)
UPM1A331MPD	Nichicon	UPM	330 µF	10 V	3000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPV1A331MGD	Nichicon	UPV	330 µF	10 V	5000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.512" (13.00 mm)	Bulk
UPW1A331MPD	Nichicon	UPW	330 µF	10 V	3000 Hrs	Not For New Designs	0.138" (4.60 mm)	0.453" (11.50 mm)	Bulk

Engineering Selection Recommendations

For Direct Replacement (Same Voltage, Same Lifetime): UKA1A331MPD is the primary equivalent. Both parts share identical electrical specifications (330 µF, 10 V, ±20%, 2000 Hrs @ 105°C) and mechanical dimensions. Both are classified as "Not For New Designs," indicating equivalent end-of-life status.

For Upgraded Performance (Extended Lifetime): UPM1A331MPD, UPV1A331MGD, and UPW1A331MPD provide extended operational lifetime (3000 Hrs to 5000 Hrs @ 105°C) while maintaining the same 10 V rating and 330 µF capacitance. These are suitable for applications requiring enhanced reliability. UPM1A331MPD carries AEC-Q200 automotive qualification.

For Higher Voltage Margin (Voltage Derating): UKA1C331MPD (16 V), UKA1E331MPD (25 V), UPA1C331MPD (16 V), and UPA1E331MPD (25 V) provide higher voltage ratings with the same 330 µF capacitance. These are applicable in circuits where voltage derating improves system reliability. UPA1C331MPD and UPA1E331MPD are Active status products, indicating current production availability.

For New Designs: UPA1C331MPD and UPA1E331MPD are the only Active status parts in this substitution group. Both are recommended for new design implementations requiring 330 µF aluminum electrolytic capacitors with extended 3000-hour lifetime.

For Packaging Variants: UPS1C331MPD1TD provides Cut Tape (CT) packaging for automated assembly, whereas standard Bulk packaging is used for manual or semi-automated processes.

For Space-Constrained Applications: UPW1A331MPD offers reduced height (0.453" vs. 0.512"), enabling use in applications with vertical space limitations while maintaining all other electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can UKA1A331MPD directly replace UPS1A331MPD? A: Yes. Both parts are 330 µF, 10 V, ±20% tolerance, with 2000-hour lifetime at 105°C, identical lead spacing (0.138"), case diameter (0.315"), and maximum height (0.512"). Mechanical and electrical compatibility is confirmed.

Q: What is the difference between UPA1C331MPD and UPS1C331MPD? A: Both are 330 µF, 16 V, ±20% tolerance with identical mechanical dimensions. The primary difference is lifetime: UPA1C331MPD provides 3000 hours at 105°C (Active status), while UPS1C331MPD provides 2000 hours at 105°C (Not For New Designs). UPA1C331MPD is recommended for new applications.

Q: Can I use a 16 V rated capacitor in place of a 10 V rated capacitor? A: Yes, provided all other parameters match. A higher voltage rating provides additional safety margin and is electrically compatible in circuits designed for 10 V operation. The 330 µF capacitance and ±20% tolerance remain unchanged.

Q: What is the advantage of UPV1A331MGD over UPS1A331MPD? A: UPV1A331MGD extends operational lifetime to 5000 hours at 105°C compared to 2000 hours for UPS1A331MPD. Both maintain 330 µF, 10 V specifications and identical physical dimensions. Extended lifetime improves reliability in long-term applications.

Q: Is UPW1A331MPD suitable for my application if space is limited? A: UPW1A331MPD has a maximum seated height of 0.453" compared to 0.512" for UPS1A331MPD, providing 0.059" (1.5 mm) reduction. All electrical specifications (330 µF, 10 V, 3000 Hrs @ 105°C) and lead spacing remain identical. Verify PCB clearance before substitution.

Q: Why are some parts marked "Not For New Designs"? A: This designation indicates the part has been superseded in the manufacturer's product line. While suitable for maintenance and repair of existing systems, Active status parts (UPA1C331MPD, UPA1E331MPD) are recommended for new product development to ensure long-term availability.

Q: What is the difference between Bulk and Cut Tape packaging? A: Bulk packaging (standard) is used for manual or semi-automated assembly. Cut Tape (CT) packaging is pre-cut and tape-formatted for automated pick-and-place equipment. Electrical and mechanical specifications are identical; packaging choice depends on assembly process requirements.

Q: Can UPM1A331MPD be used in non-automotive applications? A: Yes. UPM1A331MPD carries AEC-Q200 automotive qualification, but this certification does not restrict use in general-purpose applications. The part meets all standard specifications (330 µF, 10 V, 3000 Hrs @ 105°C) and is electrically compatible with UPS1A331MPD.

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