UKA1C331MPD Equivalent & Substitute Parts

Part Overview

The UKA1C331MPD 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 This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product portfolio. The UKA series offers a 2000-hour lifetime rating at 105°C and is suitable for audio applications requiring through-hole mounting.

Identifying equivalent and substitute parts is necessary due to the product's discontinued status for new designs. Alternative components with matching or superior electrical characteristics and compliance certifications ensure design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-55°C to 105°C
Polarization	Polar
Mounting Type	Through Hole
Package	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)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UKA1C331MPD is determined by the following critical parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: Minimum 16 V (equal or higher acceptable)
Tolerance: ±20% (standard for aluminum electrolytic capacitors)
Polarization: Polar (non-negotiable)
Mounting Type: Through Hole (mechanical compatibility)
Package Configuration: Radial, Can (footprint compatibility)
Lead Spacing: 0.138" (4.60 mm) (PCB layout compatibility)
Physical Dimensions: 0.315" Dia (8.00 mm), Height ≤ 0.531" (14.60 mm) (board space constraints)
Operating Temperature Range: -55°C to 105°C minimum (functional requirement)
RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Substitute parts are grouped into two categories:

Upgrade Path (Higher Voltage or Extended Lifetime): Parts with 25 V rating or 3000+ hour lifetime ratings provide enhanced reliability margins.

Direct Equivalents (Same Electrical Specifications): Parts from alternative manufacturers with identical or superior electrical performance and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Impedance	Product Status	Compliance
UKA1C331MPD	Nichicon	330 µF	16 V	2000 Hrs	—	Not For New Designs	ROHS3
UKA1E331MPD	Nichicon	330 µF	25 V	2000 Hrs	—	Not For New Designs	ROHS3
UPA1C331MPD	Nichicon	330 µF	16 V	3000 Hrs	90 mOhms	Active	ROHS3
UPA1E331MPD	Nichicon	330 µF	25 V	3000 Hrs	90 mOhms	Active	ROHS3
UPS1C331MPD	Nichicon	330 µF	16 V	2000 Hrs	280 mOhms	Not For New Designs	ROHS3
337KXM016M	Cornell Dubilier / Illinois Capacitor	330 µF	16 V	3000 Hrs	220 mOhms	Active	ROHS3
337RZM016M	Cornell Dubilier / Illinois Capacitor	330 µF	16 V	3000 Hrs	540 mOhms	Active	ROHS3
ELXZ160ELL331MH12D	Chemi-Con	330 µF	16 V	3000 Hrs	120 mOhms	Active	ROHS3, AEC-Q200
MAL215055331E3	Vishay Beyschlag/Draloric/BC Components	330 µF	16 V	4000 Hrs	117 mOhms	Active	ROHS3, AEC-Q200
MAL215085331E3	Vishay Beyschlag/Draloric/BC Components	330 µF	16 V	4000 Hrs	117 mOhms	Active	ROHS3, AEC-Q200

Engineering Selection Recommendations

For Nichicon-Only Designs: UPA1C331MPD is the direct active-status replacement. It maintains the same 16 V rating and 330 µF capacitance while extending lifetime to 3000 hours at 105°C. Product status is Active, ensuring long-term availability.

For Enhanced Voltage Margin: UPA1E331MPD provides 25 V rating with 3000-hour lifetime, offering increased safety margin in applications subject to voltage transients. Mechanical compatibility is maintained.

For Multi-Manufacturer Flexibility: 337KXM016M (Cornell Dubilier) and ELXZ160ELL331MH12D (Chemi-Con) are Active-status alternatives with 3000-hour lifetimes. ELXZ160ELL331MH12D carries AEC-Q200 automotive qualification, suitable for automotive-grade applications.

For Extended Lifetime Requirements: MAL215055331E3 and MAL215085331E3 (Vishay) offer 4000-hour lifetime ratings at 105°C with AEC-Q200 compliance, providing maximum reliability for mission-critical applications.

All recommended substitutes maintain identical lead spacing (0.138" / 4.60 mm), physical dimensions (0.315" Dia / 8.00 mm), and through-hole mounting compatibility. All are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can UKA1E331MPD (25 V) replace UKA1C331MPD (16 V) directly?

A: Yes. Higher voltage ratings are electrically compatible in applications designed for lower voltages. The 25 V part operates safely in 16 V circuits with no functional degradation. Physical dimensions and lead spacing are identical.

Q: What is the difference between UPA1C331MPD and UPA1E331MPD?

A: Both are Nichicon UPA series with Active product status and 3000-hour lifetime. UPA1C331MPD is rated 16 V; UPA1E331MPD is rated 25 V. Capacitance, tolerance, impedance, and physical dimensions are identical. Selection depends on circuit voltage requirements.

Q: Are automotive-qualified parts (AEC-Q200) required for this application?

A: AEC-Q200 qualification is required only for automotive applications. ELXZ160ELL331MH12D, MAL215055331E3, and MAL215085331E3 carry this certification. For general-purpose or audio applications, non-automotive-qualified parts are acceptable.

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

A: This designation indicates the part is in end-of-life status. Nichicon no longer recommends it for new circuit designs. Active-status alternatives (UPA series, 337KXM016M, ELXZ160ELL331MH12D, MAL series) should be used for new designs to ensure long-term supply availability.

Q: How do impedance differences affect substitution?

A: Impedance affects ripple current handling and high-frequency performance. Lower impedance (90–120 mOhms) provides better high-frequency filtering. Higher impedance (280–540 mOhms) is acceptable for low-frequency audio applications. Selection depends on circuit ripple current requirements.

Q: Are all substitute parts mechanically interchangeable?

A: Yes. All listed substitutes maintain 0.138" (4.60 mm) lead spacing, 0.315" Dia (8.00 mm) body diameter, and through-hole radial configuration. Maximum seated height is 0.512–0.531", ensuring compatibility with standard PCB layouts. Verify board clearance for height-sensitive designs.

Q: What is the difference between 337KXM016M and 337RZM016M?

A: Both are Cornell Dubilier 16 V, 330 µF, 3000-hour parts. 337KXM016M has 220 mOhms impedance; 337RZM016M has 540 mOhms impedance. 337KXM016M is preferred for applications requiring lower impedance and better high-frequency performance.

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