Nichicon URS1E331MPD Equivalent & Substitute Parts

Part Overview

The Nichicon URS1E331MPD is a 330 µF, 25 V aluminum electrolytic capacitor in radial, can package format with a 2000-hour lifetime rating at 85°C. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing maintenance, repair, and legacy system support. The part is ROHS3 compliant and suitable for general-purpose applications requiring stable capacitance and ripple current handling in through-hole mounting configurations.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can
Lead Spacing	0.197" (5.00mm)
Size / Dimension	0.394" Dia (10.00mm)
Height - Seated (Max)	0.354" (9.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the URS1E331MPD is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 25 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 2000 Hrs @ 85°C (exact match required)
Operating Temperature: -40°C ~ 85°C (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Acceptable Variation Parameters:

Lead Spacing: 0.138" (4.60mm) or 0.197" (5.00mm) — acceptable if PCB layout permits
Size / Dimension: 0.315" Dia (8.00mm) or 0.394" Dia (10.00mm) — acceptable if board space permits
Height - Seated: Variations acceptable if clearance exists
Ripple Current ratings: May vary within acceptable operating margins

Substitute parts are grouped into two categories: direct mechanical replacements (identical lead spacing and footprint) and functional equivalents (same electrical performance with different physical dimensions).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 85°C	Operating Temp	Lead Spacing	Size Dia	Height (Max)	Mounting Type	Package	Product Status
URS1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.197" (5.00mm)	0.394" (10.00mm)	0.354" (9.00mm)	Through Hole	Radial, Can	Obsolete
UVR1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	Through Hole	Radial, Can	Not For New Designs
UVK1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	Through Hole	Radial, Can	Not For New Designs
ECA-1EM331B	Panasonic Electronic Components	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.197" (5.00mm)	0.315" (8.00mm)	0.492" (12.50mm)	Through Hole	Radial, Can	Active
ECA-1EM331	Panasonic Electronic Components	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.138" (4.60mm)	0.315" (8.00mm)	0.492" (12.50mm)	Through Hole	Radial, Can	Active
ECA-1EM331BJ	Panasonic Electronic Components	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.138" (4.60mm)	0.315" (8.00mm)	0.492" (12.50mm)	Through Hole	Radial, Can	Active
ESMG250ELL331MHB5D	Chemi-Con	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	Through Hole	Radial, Can	Active
SK331M025ST	Cornell Dubilier Electronics (CDE)	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	0.197" (5.00mm)	0.394" (10.00mm)	0.591" (15.00mm)	Through Hole	Radial, Can	Active
UUR1E331MNL1GS	Nichicon	330 µF	25 V	±20%	2000 Hrs	-40°C ~ 85°C	—	0.394" (10.00mm)	0.413" (10.50mm)	Surface Mount	Radial, Can - SMD	Obsolete

Engineering Selection Recommendations

Direct Mechanical Replacement (Identical Footprint): UVR1E331MPD (Nichicon) is the closest direct replacement, matching the URS1E331MPD in lead spacing (0.197" / 5.00mm) and diameter (0.394" / 10.00mm). The increased height (0.551" vs. 0.354") requires verification of available board clearance. This part carries "Not For New Designs" status but remains functionally equivalent for legacy system support.

SK331M025ST (Cornell Dubilier Electronics) provides an active-status alternative with identical lead spacing and diameter. The increased height (0.591" vs. 0.354") and specified ESR of 560mOhm require clearance and performance validation.

Functional Equivalents with Different Footprints: ECA-1EM331B and ECA-1EM331BJ (Panasonic Electronic Components) are active-status parts with identical electrical specifications. These parts feature reduced lead spacing (0.138" vs. 0.197") and smaller diameter (0.315" vs. 0.394"), requiring PCB layout modification. Both are ROHS3 compliant.

ECA-1EM331 (Panasonic Electronic Components) offers the same electrical performance as ECA-1EM331B with identical physical dimensions and active product status.

ESMG250ELL331MHB5D (Chemi-Con) is an active-status part with reduced footprint (0.138" lead spacing, 0.315" diameter) and increased height (0.512"). This part is suitable for applications with available vertical clearance.

Surface Mount Alternative: UUR1E331MNL1GS (Nichicon) is a surface-mount variant with identical electrical specifications. This part is classified as obsolete and requires surface-mount assembly capability, making it unsuitable for through-hole replacement applications.

Selection Criteria:

For direct through-hole replacement without PCB modification: UVR1E331MPD or SK331M025ST
For active-status components: ECA-1EM331B, ECA-1EM331, ECA-1EM331BJ, ESMG250ELL331MHB5D
For space-constrained applications: ECA-1EM331 or ECA-1EM331BJ (reduced footprint)
For maximum ripple current handling: UVR1E331MPD (660 mA @ 10 kHz)

All recommended substitutes maintain ROHS3 compliance and -40°C ~ 85°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use ECA-1EM331B as a direct replacement for URS1E331MPD without modifying the PCB?

A: ECA-1EM331B has different lead spacing (0.138" vs. 0.197") and diameter (0.315" vs. 0.394"), requiring PCB layout modification. If your PCB is designed for the URS1E331MPD footprint, UVR1E331MPD or SK331M025ST are more suitable without layout changes.

Q: What is the difference between ECA-1EM331 and ECA-1EM331B?

A: Both parts have identical electrical specifications (330 µF, 25 V, ±20%, 2000 Hrs @ 85°C) and physical dimensions. The primary difference is packaging: ECA-1EM331 is supplied in bulk, while ECA-1EM331B is supplied in tape and box format. Lead spacing differs: ECA-1EM331 has 0.138" spacing, while ECA-1EM331B has 0.197" spacing.

Q: Why is UUR1E331MNL1GS listed as a substitute if it is surface mount?

A: UUR1E331MNL1GS is electrically equivalent but requires surface-mount assembly. It is listed as a substitute only for applications where surface-mount technology is available and through-hole mounting is not required.

Q: Can I use a substitute part with a different height if my PCB has clearance?

A: Yes, if your PCB layout provides sufficient vertical clearance above the component, parts with greater height (such as SK331M025ST at 0.591" or UVR1E331MPD at 0.551") are acceptable substitutes, provided all other electrical and mechanical parameters match.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the compliance status of the URS1E331MPD.

Q: What does "Not For New Designs" status mean for UVR1E331MPD?

A: This designation indicates the part is available for existing applications and legacy system support but should not be selected for new product designs. For new designs, active-status alternatives such as ECA-1EM331B, ECA-1EM331, or ESMG250ELL331MHB5D are recommended.

Q: How do I determine which substitute part is best for my application?

A: Verify three factors: (1) PCB footprint compatibility (lead spacing and diameter), (2) available vertical clearance for component height, and (3) ripple current requirements at your operating frequency. Cross-reference these against the parameter comparison table to identify compatible parts.

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