UPW2E331MRD Equivalent & Substitute Parts

Part Overview

The UPW2E331MRD is a 330 µF, 250 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 8000 hours at 105°C and is designed for general-purpose applications requiring polar capacitive energy storage. The part is currently obsolete, making equivalent substitutes necessary for ongoing production, maintenance, and repair applications. Substitute parts must maintain the same capacitance, voltage rating, and polarization while accommodating variations in physical dimensions, ripple current ratings, and operational lifetime specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	UPW2E331MRD
Manufacturer	Nichicon
Capacitance	330 µF
Voltage - Rated	250 V
Tolerance	±20%
Polarization	Polar
Operating Temperature Range	-40°C ~ 105°C
Lifetime @ Temp.	8000 Hrs @ 105°C
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the UPW2E331MRD is determined by strict adherence to the following electrical parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 250 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -40°C ~ 105°C (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

All four substitute parts—UCY2E331MHD, UPS2E331MRD, UVY2E331MRD, and UVZ2E331MRD—meet these core electrical and mechanical requirements. Variations in physical dimensions (diameter and height), ripple current ratings, and operational lifetime do not disqualify substitution when the primary electrical specifications are identical. The selection among substitutes depends on circuit board layout constraints, thermal management requirements, and application-specific ripple current demands.

Parameter Comparison

Parameter	UPW2E331MRD	UCY2E331MHD	UPS2E331MRD	UVY2E331MRD	UVZ2E331MRD
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage - Rated	250 V	250 V	250 V	250 V	250 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Lifetime @ Temp.	8000 Hrs @ 105°C	12000 Hrs @ 105°C	3000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C
Ripple Current @ 120 Hz	1.15 A	1.6 A	1.15 A	710 mA	730 mA
Ripple Current @ High Frequency	1.3225 A @ 10 kHz	3.2 A @ 100 kHz	1.3225 A @ 10 kHz	816.5 mA @ 10 kHz	839.5 mA @ 10 kHz
Lead Spacing	0.394" (10.00 mm)	0.295" (7.50 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension (Diameter)	0.866" (22.00 mm)	0.709" (18.00 mm)	0.866" (22.00 mm)	0.787" (20.00 mm)	0.866" (22.00 mm)
Height - Seated (Max)	1.969" (50.00 mm)	1.870" (47.50 mm)	2.047" (52.00 mm)	1.654" (42.00 mm)	2.047" (52.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Obsolete	Obsolete	Obsolete

Engineering Selection Recommendations

UCY2E331MHD is the preferred substitute when available. This part is currently active in production, ensuring long-term supply chain availability. It provides superior operational lifetime (12000 hours at 105°C versus 8000 hours) and higher ripple current capacity (3.2 A at 100 kHz), making it suitable for demanding thermal and electrical environments. The reduced physical dimensions (18.00 mm diameter, 47.50 mm height) and tighter lead spacing (7.50 mm) require PCB layout verification before implementation. REACH compliance status differs from the original part.

UPS2E331MRD and UVZ2E331MRD are functionally equivalent alternatives with identical lead spacing (10.00 mm) and similar physical footprints to the UPW2E331MRD, minimizing PCB redesign requirements. Both are obsolete, presenting potential supply constraints. UPS2E331MRD offers reduced operational lifetime (3000 hours at 105°C), while UVZ2E331MRD provides the lowest ripple current rating (839.5 mA at 10 kHz).

UVY2E331MRD is the most compact substitute (20.00 mm diameter, 42.00 mm height) and maintains standard lead spacing (10.00 mm). This part is suitable for space-constrained applications but offers the lowest ripple current capacity (816.5 mA at 10 kHz) and shortest operational lifetime (2000 hours at 105°C).

All substitutes maintain ROHS3 compliance and are suitable for general-purpose applications within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can UCY2E331MHD be used as a direct replacement for UPW2E331MRD on existing PCBs?

A: Electrical substitution is valid. However, the reduced lead spacing (7.50 mm versus 10.00 mm) and smaller physical dimensions require PCB layout verification. Mounting holes and trace routing may need adjustment.

Q: What is the primary difference between UPS2E331MRD and UPW2E331MRD?

A: Both parts share identical electrical specifications, lead spacing, and physical dimensions. The primary difference is operational lifetime: UPS2E331MRD is rated for 3000 hours at 105°C compared to 8000 hours for UPW2E331MRD. This makes UPS2E331MRD suitable only for applications with lower thermal stress or shorter service life requirements.

Q: Why do UVY2E331MRD and UVZ2E331MRD have lower ripple current ratings?

A: These parts are designed for lower-stress applications. The reduced ripple current capacity (approximately 60% of the original part) reflects their intended use in circuits with lower AC current demands. Circuit analysis is required to confirm compatibility.

Q: Is the UCY2E331MHD suitable for high-frequency switching applications?

A: Yes. The UCY2E331MHD demonstrates significantly higher ripple current capacity at high frequency (3.2 A at 100 kHz), making it suitable for switching power supplies and other high-frequency circuits where the original UPW2E331MRD may be marginal.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitutes are ROHS3 compliant. However, REACH compliance status varies. UCY2E331MHD is REACH Affected, while UPW2E331MRD, UPS2E331MRD, UVY2E331MRD, and UVZ2E331MRD are REACH Unaffected. Regulatory requirements for your application should be confirmed.

Q: Can I use UVY2E331MRD in a high-ripple-current circuit?

A: No. UVY2E331MRD is rated for only 816.5 mA at 10 kHz, which is approximately 62% of the original UPW2E331MRD specification (1.3225 A at 10 kHz). Use this part only in applications with confirmed lower ripple current requirements.

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