UKT1A331MPD Equivalent & Substitute Parts

Part Overview

The UKT1A331MPD is a 330 µF, 10 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 This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Organizations using this part in active applications require equivalent alternatives that maintain electrical and mechanical compatibility while meeting current design standards and compliance requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Lead Spacing	0.138" (4.60mm)
Package / Case	Radial, Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UKT1A331MPD is determined by the following criteria:

Primary Compatibility Requirements:

Capacitance: 330 µF (exact match required)
Voltage Rating: 10 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (matching tolerance specification)
Package / Case: Radial, Can (mechanical form factor)
Lead Spacing: 0.138" (4.60mm) (PCB footprint compatibility)
Mounting Type: Through Hole (assembly method)
Polarization: Polar (electrical polarity requirement)
Operating Temperature Range: -55°C ~ 105°C (thermal envelope)

Secondary Considerations:

Lifetime @ Temperature: 1000 Hrs @ 105°C or greater (reliability specification)
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories: direct equivalents (same voltage rating) and upgraded alternatives (higher voltage ratings with identical mechanical and electrical characteristics).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Product Status	Inventory
UKT1A331MPD	Nichicon	330 µF	10 V	±20%	1000 Hrs	0.138" (4.60mm)	Not For New Designs	989 Pcs
UKT1C331MPD	Nichicon	330 µF	16 V	±20%	1000 Hrs	0.138" (4.60mm)	Not For New Designs	3602 Pcs
UKT1E331MPD	Nichicon	330 µF	25 V	±20%	1000 Hrs	0.138" (4.60mm)	Not For New Designs	2364 Pcs
UPW1A331MPD	Nichicon	330 µF	10 V	±20%	3000 Hrs	0.138" (4.60mm)	Not For New Designs	6343 Pcs
UPW1C331MPD	Nichicon	330 µF	16 V	±20%	3000 Hrs	0.138" (4.60mm)	Not For New Designs	8253 Pcs
EEU-FC1A331	Panasonic Electronic Components	330 µF	10 V	±20%	2000 Hrs	0.138" (4.60mm)	Active	1982 Pcs
EEU-FC1C331	Panasonic Electronic Components	330 µF	16 V	±20%	2000 Hrs	0.138" (4.60mm)	Active	4818 Pcs
SEK331M010ST	Cornell Dubilier Electronics (CDE)	330 µF	10 V	±20%	2000 Hrs	0.138" (4.60mm)	Active	9133 Pcs

Engineering Selection Recommendations

For Direct Voltage Equivalence (10 V Rating):

EEU-FC1A331 (Panasonic) is the preferred substitute. This part maintains the 10 V voltage specification while offering Active product status, indicating ongoing manufacturer support and availability. The 2000 Hrs @ 105°C lifetime exceeds the original 1000 Hrs specification. AEC-Q200 automotive qualification provides additional reliability assurance. ROHS3 compliance is maintained.

SEK331M010ST (Cornell Dubilier Electronics) provides an alternative 10 V equivalent with Active status and 2000 Hrs @ 105°C lifetime. This part is suitable for general-purpose applications and maintains full mechanical and electrical compatibility.

UPW1A331MPD (Nichicon) offers extended lifetime (3000 Hrs @ 105°C) while maintaining the original 10 V rating and Nichicon manufacturer continuity. This option is appropriate when enhanced reliability is required.

For Voltage Upgrade Applications (16 V or Higher):

EEU-FC1C331 (Panasonic) provides a 16 V upgrade with Active product status, AEC-Q200 qualification, and 2000 Hrs @ 105°C lifetime. Higher voltage rating provides additional design margin in applications where circuit voltage may fluctuate.

UPW1C331MPD (Nichicon) offers 16 V rating with extended 3000 Hrs @ 105°C lifetime, maintaining Nichicon supply chain continuity.

UKT1E331MPD (Nichicon) provides 25 V rating for applications requiring maximum voltage margin, though product status remains "Not For New Designs."

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. EEU-FC series parts carry AEC-Q200 automotive qualification, suitable for automotive and mission-critical applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute UKT1A331MPD with a higher voltage rating part?

A: Yes. Higher voltage ratings (16 V or 25 V) are electrically compatible substitutes. The capacitor will function correctly in circuits designed for 10 V operation. Higher voltage ratings provide additional design margin and do not negatively impact circuit performance.

Q: What is the difference between UKT and UPW series parts?

A: Both are Nichicon aluminum electrolytic capacitors with identical electrical and mechanical specifications. The primary difference is lifetime rating: UKT series offers 1000 Hrs @ 105°C, while UPW series offers 3000 Hrs @ 105°C. UPW series is suitable for applications requiring extended operational life.

Q: Are Panasonic EEU-FC parts compatible with Nichicon UKT parts?

A: Yes. EEU-FC1A331 and EEU-FC1C331 are fully compatible substitutes. They maintain identical capacitance, voltage, tolerance, lead spacing, and package configuration. Panasonic parts offer Active product status and AEC-Q200 qualification, making them suitable for new designs and automotive applications.

Q: What does "Not For New Designs" mean?

A: This designation indicates the part has been superseded by the manufacturer and is no longer recommended for new product development. Existing inventory may remain available, but long-term supply cannot be guaranteed. Active status alternatives should be prioritized for new designs.

Q: Does lead spacing affect PCB compatibility?

A: Yes. All listed substitutes maintain 0.138" (4.60mm) lead spacing, ensuring direct PCB footprint compatibility. No layout modifications are required when substituting between parts with matching lead spacing.

Q: Can I use SEK331M010ST in audio applications?

A: Yes. SEK331M010ST is rated for general-purpose applications and maintains full electrical compatibility with the original UKT1A331MPD, which is specified for audio use. The part is suitable for audio circuit applications.

Q: What is the significance of AEC-Q200 qualification?

A: AEC-Q200 is an automotive industry qualification standard. Parts carrying this certification have undergone rigorous reliability testing and are approved for automotive applications. EEU-FC series parts meet this standard, making them suitable for automotive and high-reliability applications.

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