URU1J331MHD Equivalent & Substitute Parts

Part Overview

The URU1J331MHD is a 330 µF, 63 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, serving general-purpose applications requiring stable capacitance and ripple current handling.

Key Parameters

Parameter	Value
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	63 V
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Ripple Current @ 120 Hz	710 mA
Ripple Current @ 10 kHz	1.065 A
Package / Case	Radial, Can
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the URU1J331MHD is determined by strict equivalence across the following parameters: capacitance (330 µF), voltage rating (63 V), tolerance (±20%), polarization (polar), and package type (radial, can through-hole). Substitute parts must maintain compatibility with the electrical specifications and physical footprint constraints of the original application.

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents — Parts with identical or superior electrical performance characteristics, including ripple current ratings and lifetime specifications. These parts are suitable for direct replacement in applications where the original footprint can accommodate dimensional variations.

Category 2: Functional Equivalents with Dimensional Variations — Parts meeting all electrical specifications but with different physical dimensions (diameter and height). These require board-level layout verification before implementation.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Ripple Current @ 120 Hz	Ripple Current @ 10 kHz	Lead Spacing	Diameter	Height (Max)	Product Status	RoHS Status
URU1J331MHD	Nichicon	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	710 mA	1.065 A	0.295" (7.50mm)	0.709" (18.00mm)	0.551" (14.00mm)	Obsolete	REACH Unaffected
URS1J331MHD	Nichicon	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	710 mA	1.065 A	0.197" (5.00mm)	0.492" (12.50mm)	0.650" (16.50mm)	Active	ROHS3 Compliant
URZ1J331MHD	Nichicon	330 µF	63 V	±20%	1000 Hrs @ 105°C	-55°C ~ 105°C	510 mA	765 mA	0.197" (5.00mm)	0.492" (12.50mm)	0.650" (16.50mm)	Active	ROHS3 Compliant
UVR1J331MPD	Nichicon	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	710 mA	816.5 mA	0.197" (5.00mm)	0.394" (10.00mm)	0.866" (22.00mm)	Not For New Designs	ROHS3 Compliant
ECA-1JM331	Panasonic Electronic Components	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	550 mA	935 mA	0.197" (5.00mm)	0.394" (10.00mm)	0.866" (22.00mm)	Active	ROHS3 Compliant
ECA-1JM331B	Panasonic Electronic Components	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	550 mA	935 mA	0.197" (5.00mm)	0.394" (10.00mm)	0.866" (22.00mm)	Active	ROHS3 Compliant
ESMG630ELL331MJ20S	Chemi-Con	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	710 mA	1.065 A @ 100 kHz	0.197" (5.00mm)	0.394" (10.00mm)	0.846" (21.50mm)	Discontinued at DiGi Electronics	ROHS3 Compliant
SK331M063ST	Cornell Dubilier Electronics (CDE)	330 µF	63 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	680 mA	884 mA @ 1 kHz	0.197" (5.00mm)	0.512" (13.00mm)	0.906" (23.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: URS1J331MHD (Nichicon)

The URS1J331MHD is the preferred substitute for the obsolete URU1J331MHD. Both parts are manufactured by Nichicon and share identical electrical specifications: 330 µF capacitance, 63 V rating, ±20% tolerance, 2000-hour lifetime at 85°C, and equivalent ripple current performance (710 mA @ 120 Hz, 1.065 A @ 10 kHz). The URS1J331MHD carries active product status and ROHS3 compliance. Physical dimensions differ (lead spacing reduced from 7.50mm to 5.00mm; diameter reduced from 18.00mm to 12.50mm; height increased from 14.00mm to 16.50mm), requiring PCB layout verification.

Secondary Recommendation: ECA-1JM331 or ECA-1JM331B (Panasonic Electronic Components)

Both Panasonic parts meet all core electrical requirements with active product status and ROHS3 compliance. Ripple current ratings are lower (550 mA @ 120 Hz, 935 mA @ 10 kHz) compared to the original specification. Physical dimensions are identical to the URS1J331MHD. ECA-1JM331B is supplied in cut tape packaging; ECA-1JM331 is supplied in bulk.

Alternative for Extended Temperature Range: URZ1J331MHD (Nichicon)

The URZ1J331MHD extends the operating temperature range to -55°C ~ 105°C with 1000-hour lifetime at 105°C. Ripple current ratings are reduced (510 mA @ 120 Hz, 765 mA @ 10 kHz). This part is suitable only for applications requiring the extended temperature specification.

Not Recommended for New Designs: UVR1J331MPD (Nichicon)

Although electrically compatible, this part carries "Not For New Designs" status and should be avoided for new applications.

Discontinued Status: ESMG630ELL331MJ20S (Chemi-Con)

This part is discontinued at DiGi Electronics and should not be selected for new production.

Frequently Asked Questions (FAQ)

Q: Can I use URS1J331MHD as a direct replacement for URU1J331MHD?

A: Electrically, yes. Both parts share identical capacitance (330 µF), voltage rating (63 V), tolerance (±20%), and lifetime specifications (2000 Hrs @ 85°C). However, physical dimensions differ. The URS1J331MHD has a smaller diameter (12.50mm vs. 18.00mm) and different lead spacing (5.00mm vs. 7.50mm). PCB layout must be verified before implementation.

Q: What is the difference between ECA-1JM331 and ECA-1JM331B?

A: Both parts are electrically identical Panasonic components with the same capacitance, voltage, tolerance, and lifetime specifications. The primary difference is packaging: ECA-1JM331 is supplied in bulk; ECA-1JM331B is supplied in cut tape (CT). Selection depends on procurement and assembly requirements.

Q: Why does URZ1J331MHD have lower ripple current ratings?

A: The URZ1J331MHD is designed for extended temperature operation (-55°C ~ 105°C with 1000-hour lifetime at 105°C). This thermal specification results in lower ripple current capacity (510 mA @ 120 Hz, 765 mA @ 10 kHz) compared to the standard -40°C ~ 85°C parts. Use this part only if the extended temperature range is required by the application.

Q: Is the SK331M063ST suitable for my application?

A: The SK331M063ST (Cornell Dubilier Electronics) meets all core electrical specifications and carries active product status with ROHS3 compliance. However, it has the largest physical footprint (diameter 13.00mm, height 23.00mm) among available substitutes. Select this part only if board space permits and ripple current performance (680 mA @ 120 Hz, 884 mA @ 1 kHz) is acceptable.

Q: What does "ROHS3 Compliant" mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. All active substitute parts listed carry this certification, ensuring regulatory compliance for applications subject to ROHS requirements.

Q: Can I use a part with lower ripple current rating?

A: Ripple current capacity must meet or exceed the application requirement. Parts with lower ratings (such as ECA-1JM331 at 550 mA @ 120 Hz versus the original 710 mA) are suitable only if the circuit design operates within the lower ripple current envelope. Circuit analysis is required to confirm compatibility.

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