Nichicon URS1A331MPD 330µF 10V Radial Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon URS1A331MPD is a 330µF 10V radial aluminum electrolytic capacitor rated for 2000 hours at 85°C, designed for general-purpose applications. This part carries an obsolete product status. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this capacitor specification.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.138" (4.60mm)
Size / Dimension	0.315" Dia (8.00mm)
Height - Seated (Max)	0.413" (10.50mm)
Ripple Current @ 120 Hz	300 mA
Ripple Current @ 10 kHz	450 mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on electrical and mechanical compatibility with the URS1A331MPD:

Similar Equivalents (Direct Replacement): Parts maintaining identical or compatible electrical specifications (330µF, 10V, ±20% tolerance, 2000 Hrs @ 85°C) with through-hole radial mounting. These parts differ in lead spacing, physical dimensions, or ripple current ratings but remain functionally equivalent within the allowed parameter tolerances.

Mounting Variant (Surface Mount): The UUR1A331MNL1GS maintains identical electrical specifications but uses surface mount technology instead of through-hole mounting. This part is electrically equivalent but requires PCB redesign for mechanical compatibility.

Upgraded Alternatives (Higher Voltage Rating): The Rubycon 16WXA330MEFC8X9 and 16WXA330MEFCCE8X9 provide 16V rating instead of 10V, with enhanced temperature performance (2000 Hrs @ 105°C vs. 85°C) and automotive-grade AEC-Q200 certification. These parts are suitable for applications where higher voltage margin and extended temperature range are beneficial.

Key Parameters Determining Substitution:

Capacitance: 330 µF (fixed requirement)
Voltage Rating: 10V minimum (16V upgrades acceptable)
Tolerance: ±20% (standard)
Lifetime: 2000 Hrs @ 85°C minimum
Mounting: Through-hole radial (unless PCB redesign is acceptable)
Lead Spacing: 0.138" (4.60mm) preferred for direct mechanical fit
Physical Dimensions: 0.315" Dia × 0.413" Height (preferred for space constraints)

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Mounting Type	Lead Spacing	Size Dia	Height Max	Ripple @ 120Hz	Ripple @ 10kHz	Product Status
URS1A331MPD	Nichicon	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.138" (4.60mm)	0.315" (8.00mm)	0.413" (10.50mm)	300 mA	450 mA	Obsolete
UUR1A331MNL1GS	Nichicon	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Surface Mount	—	0.315" (8.00mm)	0.413" (10.50mm)	240 mA	312 mA	Obsolete
UVR1A331MED	Nichicon	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	290 mA	435 mA	Obsolete
16WXA330MEFC8X9	Rubycon	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	Through Hole	0.138" (4.60mm)	0.315" (8.00mm)	0.413" (10.50mm)	270 mA	324 mA	Active
16WXA330MEFCCE8X9	Rubycon	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	Through Hole	0.138" (4.60mm)	0.315" (8.00mm)	0.413" (10.50mm)	270 mA	324 mA	Active
ECA-1AM331	Panasonic	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.098" (2.50mm)	0.248" (6.30mm)	0.480" (12.20mm)	330 mA	561 mA	Active
ECA-1AM331B	Panasonic	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.197" (5.00mm)	0.248" (6.30mm)	0.480" (12.20mm)	330 mA	561 mA	Active
ECA-1AM331I	Panasonic	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.098" (2.50mm)	0.248" (6.30mm)	0.480" (12.20mm)	330 mA	561 mA	Active
ESMG100ELL331MF11D	Chemi-Con	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	290 mA	435 mA	Active
SK331M010ST	Cornell Dubilier Electronics	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	330 mA	363 mA	Active
337SAK010M	Cornell Dubilier / Illinois Capacitor	330 µF	10 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	0.138" (4.60mm)	0.315" (8.00mm)	0.413" (10.50mm)	300 mA	450 mA	Active

Engineering Selection Recommendations

For Direct Mechanical and Electrical Replacement: The 337SAK010M (Cornell Dubilier / Illinois Capacitor) provides the closest match to the URS1A331MPD. Both parts share identical lead spacing (0.138" / 4.60mm), physical diameter (0.315" / 8.00mm), and height (0.413" / 10.50mm), enabling direct PCB substitution without layout modifications. The 337SAK010M carries active product status and ROHS3 compliance, ensuring long-term supply availability and regulatory compliance.

For Active Product Status with Identical Specifications: The Panasonic ECA-1AM331B offers active product status with 330µF, 10V, ±20% tolerance, and 2000 Hrs @ 85°C lifetime. However, the 0.197" (5.00mm) lead spacing differs from the original 0.138" (4.60mm), requiring PCB modification. The ECA-1AM331 and ECA-1AM331I variants provide tighter lead spacing (0.098" / 2.50mm) but still require layout adjustment. All Panasonic variants deliver superior ripple current performance (330 mA @ 120 Hz, 561 mA @ 10 kHz).

For Enhanced Performance and Extended Temperature Range: The Rubycon 16WXA330MEFCCE8X9 and 16WXA330MEFC8X9 upgrade the voltage rating to 16V with extended operating temperature range (-55°C ~ 105°C) and 2000 Hrs @ 105°C lifetime. These parts maintain identical lead spacing and physical dimensions to the original part, enabling direct mechanical substitution. Both carry AEC-Q200 automotive certification and active product status, suitable for applications requiring higher voltage margin and thermal performance.

For Compact Form Factor: The Nichicon UVR1A331MED and Chemi-Con ESMG100ELL331MF11D provide smaller physical dimensions (0.248" Dia / 6.30mm) while maintaining electrical equivalence. These parts require PCB redesign due to reduced lead spacing (0.098" / 2.50mm) and increased height (0.492" / 12.50mm).

Frequently Asked Questions (FAQ)

Q: Can I use the Rubycon 16WXA330MEFCCE8X9 as a direct replacement for the URS1A331MPD? A: Yes. The 16WXA330MEFCCE8X9 maintains identical lead spacing (0.138" / 4.60mm), physical diameter (0.315" / 8.00mm), and height (0.413" / 10.50mm). The 16V rating provides additional voltage margin over the original 10V specification. No PCB modification is required for mechanical compatibility.

Q: What is the difference between the Panasonic ECA-1AM331, ECA-1AM331B, and ECA-1AM331I? A: All three Panasonic variants share identical electrical specifications (330µF, 10V, ±20%, 2000 Hrs @ 85°C) and active product status. The primary differences are lead spacing and packaging: ECA-1AM331 uses 0.098" (2.50mm) lead spacing with bulk packaging; ECA-1AM331B uses 0.197" (5.00mm) lead spacing with tape & box packaging; ECA-1AM331I uses 0.098" (2.50mm) lead spacing with tape & box packaging. Lead spacing differences require PCB layout modification.

Q: Why is the UUR1A331MNL1GS listed as a substitute if it uses surface mount technology? A: The UUR1A331MNL1GS is electrically equivalent (330µF, 10V, ±20%, 2000 Hrs @ 85°C) but requires PCB redesign for mechanical compatibility. It is listed for applications where PCB conversion to surface mount technology is feasible or planned.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed in this reference carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: What is the advantage of selecting the Cornell Dubilier 337SAK010M over other options? A: The 337SAK010M provides active product status with zero PCB modification required due to identical mechanical dimensions and lead spacing. It matches the original URS1A331MPD footprint exactly while ensuring long-term supply availability.

Q: Can I substitute a 10V capacitor with a 16V capacitor in my application? A: Yes. A 16V-rated capacitor is electrically compatible with a 10V circuit. The higher voltage rating provides additional safety margin and typically extends component lifetime. No circuit modification is required.

Q: What does "2000 Hrs @ 85°C" mean? A: This specification indicates the capacitor's expected operational lifetime under continuous operation at 85°C ambient temperature. All listed parts maintain this minimum lifetime rating, ensuring equivalent reliability in thermal conditions.

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