UPS2A331MHD Equivalent & Substitute Parts

Part Overview

The UPS2A331MHD is a 330 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has reached end-of-life status. The UPS series offers a 3000-hour lifetime rating at 105°C, making it suitable for general-purpose applications requiring moderate operational longevity. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for design continuity and component sourcing.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-55°C to 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.295" (7.50 mm)
Can Diameter	0.630" (16.00 mm)
Height	1.063" (27.00 mm)
Impedance	90 mOhms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UPS2A331MHD is determined by strict equivalence across the following critical parameters:

Electrical Equivalence: Capacitance (330 µF), voltage rating (100 V), and tolerance (±20%) must match exactly
Mechanical Compatibility: Lead spacing (7.50 mm), mounting type (through hole), and package configuration (radial can) must be identical to ensure PCB fit without redesign
Thermal Performance: Operating temperature range (-55°C to 105°C) must be maintained
Polarization: Polar configuration is mandatory for this application

Substitute parts are grouped into two categories:

Upgrade Substitutes (Enhanced Lifetime): Parts with extended operational lifetime at 105°C while maintaining identical electrical and mechanical specifications. These provide improved reliability for the same footprint.

Similar Substitutes (Equivalent Performance): Parts meeting all critical parameters with variations in secondary characteristics such as ripple current handling, impedance, or can diameter. These maintain functional equivalence while offering alternative performance profiles.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Can Diameter	Height	Impedance	Product Status	RoHS
UPS2A331MHD	Nichicon	330 µF	100 V	±20%	3000 Hrs	7.50 mm	16.00 mm	27.00 mm	90 mOhms	Not For New Designs	ROHS3
UPW2A331MHD	Nichicon	330 µF	100 V	±20%	8000 Hrs	7.50 mm	16.00 mm	25.00 mm	90 mOhms	Not For New Designs	ROHS3
UPJ2A331MHD	Nichicon	330 µF	100 V	±20%	5000 Hrs	7.50 mm	16.00 mm	33.00 mm	62 mOhms	Not For New Designs	ROHS3
UPJ2A331MHD6	Nichicon	330 µF	100 V	±20%	5000 Hrs	7.50 mm	18.00 mm	26.50 mm	70 mOhms	Not For New Designs	ROHS3
UPM2A331MHD6	Nichicon	330 µF	100 V	±20%	5000 Hrs	7.50 mm	18.00 mm	27.00 mm	70 mOhms	Not For New Designs	ROHS3
EEU-FC2A331	Panasonic Electronic Components	330 µF	100 V	±20%	5000 Hrs	7.50 mm	16.00 mm	31.50 mm	62 mOhms	Active	ROHS3
EEU-FC2A331S	Panasonic Electronic Components	330 µF	100 V	±20%	5000 Hrs	7.50 mm	18.00 mm	25.00 mm	70 mOhms	Active	ROHS3
EEU-FC2A331SB	Panasonic Electronic Components	330 µF	100 V	±20%	5000 Hrs	7.50 mm	18.00 mm	27.00 mm	70 mOhms	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement Without PCB Modification:

UPW2A331MHD is the optimal substitute when PCB layout constraints are minimal. It maintains identical lead spacing (7.50 mm) and can diameter (16.00 mm) as the UPS2A331MHD while offering extended lifetime (8000 hours vs. 3000 hours at 105°C). Height reduction from 27.00 mm to 25.00 mm provides additional clearance margin. Both parts carry ROHS3 compliance and Not For New Designs status.

For Applications Requiring Active Product Status:

EEU-FC2A331S and EEU-FC2A331SB from Panasonic are Active products meeting all electrical specifications. Both maintain 7.50 mm lead spacing and 100 V rating. EEU-FC2A331SB is available in Cut Tape packaging, while EEU-FC2A331S is supplied in Bulk. Can diameter increases to 18.00 mm, requiring PCB footprint verification. Both offer 5000-hour lifetime at 105°C with AEC-Q200 automotive qualification.

For Automotive Applications:

UPM2A331MHD6 carries AEC-Q200 certification and automotive application rating. It maintains 7.50 mm lead spacing with 18.00 mm can diameter and 27.00 mm height. Impedance is 70 mOhms with 5000-hour lifetime at 105°C. REACH status is Affected, requiring compliance verification for specific supply chain requirements.

For Space-Constrained Designs:

EEU-FC2A331S offers the lowest profile at 25.00 mm height while maintaining all electrical parameters. Can diameter is 18.00 mm. This configuration is suitable when vertical clearance is limited.

Frequently Asked Questions (FAQ)

Q: Can UPS2A331MHD be replaced with any 330 µF, 100 V capacitor?

A: No. Substitution requires exact matching of lead spacing (7.50 mm), mounting type (through hole), and package configuration (radial can). Can diameter and height must be verified against PCB layout to prevent mechanical interference. Tolerance (±20%) and operating temperature range (-55°C to 105°C) must also be maintained.

Q: What is the difference between UPW2A331MHD and UPJ2A331MHD?

A: Both are Nichicon products with identical electrical ratings (330 µF, 100 V, ±20%). UPW2A331MHD offers 8000-hour lifetime at 105°C with 25.00 mm height. UPJ2A331MHD provides 5000-hour lifetime with 33.00 mm height and lower impedance (62 mOhms vs. 90 mOhms). Height difference requires PCB clearance verification.

Q: Are Panasonic EEU-FC series parts direct drop-in replacements?

A: EEU-FC2A331 and EEU-FC2A331S maintain 7.50 mm lead spacing but have larger can diameters (16.00 mm and 18.00 mm respectively) and different heights compared to UPS2A331MHD. PCB footprint must be verified. Both are Active products with AEC-Q200 certification, offering improved availability compared to discontinued Nichicon UPS series.

Q: What does "Not For New Designs" mean for the UPS2A331MHD?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing inventory may be available, but long-term supply cannot be guaranteed. New designs should specify Active products such as EEU-FC2A331 or EEU-FC2A331S from Panasonic.

Q: How do I verify mechanical compatibility when substituting?

A: Compare three critical dimensions: lead spacing (must be 7.50 mm), can diameter, and height. The UPS2A331MHD has 16.00 mm diameter and 27.00 mm height. Substitute parts with 18.00 mm diameter require PCB layout modification. Height variations affect vertical clearance; verify against component placement constraints and enclosure dimensions.

Q: What is the significance of impedance differences between substitute parts?

A: Impedance affects high-frequency ripple current handling and transient response. UPS2A331MHD has 90 mOhms impedance. Substitutes with lower impedance (62-70 mOhms) provide improved performance in high-frequency applications but do not affect basic capacitance or voltage rating. Selection depends on circuit ripple current requirements at operating frequency.

Q: Can I use EEU-FC2A331SB in place of EEU-FC2A331?

A: Both parts are electrically and mechanically identical (330 µF, 100 V, 7.50 mm lead spacing, 18.00 mm diameter, 70 mOhms impedance). The difference is packaging: EEU-FC2A331SB is supplied in Cut Tape (CT) while EEU-FC2A331 is supplied in Bulk. Selection depends on procurement and assembly requirements, not functional compatibility.

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