UFG1J331MHM1TO Equivalent & Substitute Parts

Part Overview

The UFG1J331MHM1TO is a 330 µF, 63 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Obsolete, indicating it is no longer in active production. The UFG series is designed for audio applications with a rated lifetime of 1000 hours at 85°C. Due to its obsolete status, equivalent and substitute parts from active or alternative product lines are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	63 V
Tolerance	±20%
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Size / Dimension	0.492" Dia (12.50 mm)
Height - Seated (Max)	1.063" (27.00 mm)
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UFG1J331MHM1TO is determined by the following critical parameters:

Electrical Compatibility:

Capacitance: 330 µF (exact match required)
Voltage Rating: 63 V minimum (higher voltage ratings are acceptable as they provide margin)
Tolerance: ±20% (standard tolerance maintained across all substitutes)
Polarization: Polar (all substitutes maintain polar configuration)

Mechanical Compatibility:

Lead Spacing: 0.197" (5.00 mm) (exact match for PCB hole alignment)
Package Type: Radial, Can (through-hole configuration)
Mounting Type: Through Hole
Physical Dimensions: 0.492" Dia (12.50 mm) and 1.063" (27.00 mm) height (standard form factor)

Environmental & Compliance:

RoHS3 Compliance (all substitutes maintain compliance)
Operating Temperature Range: -40°C to 85°C minimum (extended ranges acceptable)

Substitute parts are grouped into two categories: direct electrical substitutes (same voltage rating) and upgraded substitutes (higher voltage rating or enhanced thermal performance). All substitutes maintain identical mechanical footprint and lead spacing for direct PCB compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ Temp	Operating Temp Range	Product Status	Ripple Current @ 120 Hz	Ripple Current @ 10 kHz
UFG1J331MHM1TO	Nichicon	UFG	330 µF	63 V	1000 Hrs @ 85°C	-40°C ~ 85°C	Obsolete	541 mA	811.5 mA
UFW2A331MHD1TO	Nichicon	UFW	330 µF	100 V	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	750 mA	1.125 A
UBW1J331MHD1TO	Nichicon	UBW	330 µF	63 V	3000 Hrs @ 135°C	-55°C ~ 135°C	Active	645 mA	1.29 A
UKL1J331MHD1TO	Nichicon	UKL	330 µF	63 V	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	710 mA	1.065 A
UPJ1J331MHD1TO	Nichicon	UPJ	330 µF	63 V	5000 Hrs @ 105°C	-55°C ~ 105°C	Not For New Designs	1.09 A	1.42 A
UPM1J331MHD1TO	Nichicon	UPM	330 µF	63 V	5000 Hrs @ 105°C	-55°C ~ 105°C	Not For New Designs	1.09 A	1.42 A
UVK2A331MHD1TO	Nichicon	UVK	330 µF	100 V	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	760 mA	1.14 A
UVR2A331MHD1TO	Nichicon	UVR	330 µF	100 V	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	760 mA	1.14 A
UVY2A331MHD1TO	Nichicon	UVY	330 µF	100 V	2000 Hrs @ 105°C	-55°C ~ 105°C	Not For New Designs	540 mA	810 mA
UVZ2A331MHD1TO	Nichicon	UVZ	330 µF	100 V	2000 Hrs @ 105°C	-55°C ~ 105°C	Not For New Designs	540 mA	810 mA
63RX30330MG412.5X25	Rubycon	RX30	330 µF	63 V	4000 Hrs @ 130°C	-40°C ~ 130°C	Active	700 mA	1 A

Engineering Selection Recommendations

For Active Production (Recommended):

UBW1J331MHD1TO (Nichicon, Active status) is the primary recommendation for new designs. This part maintains the 63 V rating of the original UFG1J331MHM1TO while offering extended thermal performance (3000 hours at 135°C) and an expanded operating temperature range (-55°C to 135°C). Active product status ensures long-term availability and supply chain stability.

63RX30330MG412.5X25 (Rubycon, Active status) provides an alternative from a different manufacturer. It delivers 4000 hours at 130°C with AEC-Q200 automotive qualification and is suitable for applications requiring automotive-grade reliability.

For Existing Designs (Maintenance & Repair):

UKL1J331MHD1TO or UPJ1J331MHD1TO maintain the 63 V rating and are mechanically compatible. UPJ1J331MHD1TO offers superior thermal performance (5000 hours at 105°C) for applications with extended operational demands.

For Voltage-Margin Applications:

UFW2A331MHD1TO, UVK2A331MHD1TO, UVR2A331MHD1TO, UVY2A331MHD1TO, and UVZ2A331MHD1TO all provide 100 V ratings, offering additional voltage margin over the original 63 V specification. These are suitable where circuit design permits higher voltage components.

All recommended substitutes maintain ROHS3 compliance, identical lead spacing (0.197" / 5.00 mm), and through-hole radial can package configuration for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a 100 V rated capacitor in place of the 63 V UFG1J331MHM1TO?

A: Yes. Higher voltage ratings are electrically compatible and provide additional safety margin. UFW2A331MHD1TO, UVK2A331MHD1TO, UVR2A331MHD1TO, UVY2A331MHD1TO, and UVZ2A331MHD1TO are all 100 V substitutes with identical mechanical footprint and lead spacing. Verify circuit design does not depend on the lower voltage rating.

Q: Are all substitute parts mechanically interchangeable?

A: Yes. All listed substitutes maintain identical lead spacing (0.197" / 5.00 mm), package type (radial can), and physical dimensions (0.492" diameter, 1.063" maximum height). Direct PCB replacement is possible without layout modification.

Q: What is the difference between Nichicon and Rubycon substitutes?

A: Both manufacturers provide equivalent electrical and mechanical specifications. Rubycon 63RX30330MG412.5X25 carries AEC-Q200 automotive qualification and is Active status. Nichicon UBW1J331MHD1TO also carries AEC-Q200 and Active status. Selection depends on supply chain preference and application requirements.

Q: Why are some substitutes marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in mature or declining production phases. While electrically and mechanically compatible, they may face future availability constraints. For new designs, prioritize Active status parts: UBW1J331MHD1TO or 63RX30330MG412.5X25.

Q: Does capacitance tolerance affect substitution?

A: All substitutes maintain ±20% tolerance, matching the original UFG1J331MHM1TO. Tolerance is not a differentiating factor for substitution eligibility.

Q: What is the significance of ripple current ratings?

A: Ripple current capacity indicates the maximum AC current the capacitor can handle at specified frequencies (120 Hz and 10 kHz). Higher ripple current ratings provide design margin for applications with significant AC ripple. Compare against circuit requirements; higher ratings do not negatively impact performance.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance, matching the original part's environmental certification status.

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