UFG1H331MHM Equivalent & Substitute Parts

Part Overview

The UFG1H331MHM is a 330 µF, 50 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as obsolete, with 1949 units currently in stock. The part is rated for 1000 hours at 85°C and is designed for audio applications. Due to its obsolete status, equivalent and substitute parts with improved performance characteristics, extended operational lifespans, or higher temperature ratings are available from active product lines.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ Temperature	1000 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	0.492" Dia (12.50mm)
Height - Seated (Max)	0.866" (22.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UFG1H331MHM is determined by the following mandatory parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 50 V (minimum; higher ratings are acceptable)
Polarization: Polar (must match)
Mounting Type: Through Hole (must match)
Package / Case: Radial, Can (must match)
Lead Spacing: 0.197" (5.00mm) (must match for PCB compatibility)
Physical Dimensions: Compatible with 0.492" diameter and similar height constraints

Substitute parts are grouped into two categories:

Upgrade Substitutes: Parts with improved performance characteristics including extended lifetime ratings, higher temperature operation, or enhanced ripple current handling while maintaining identical electrical and mechanical specifications.

Similar Substitutes: Parts with identical electrical ratings and mechanical compatibility but different physical dimensions (smaller form factor) or slightly different series designations.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Status	Size / Dimension	Height (Max)
UFG1H331MHM	Nichicon	330 µF	50 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Obsolete	0.492" Dia (12.50mm)	0.866" (22.00mm)
UBT1H331MHD8	Nichicon	330 µF	50 V	±20%	10000 Hrs @ 125°C	-40°C ~ 125°C	Active	0.492" Dia (12.50mm)	0.866" (22.00mm)
UBW1H331MHD	Nichicon	330 µF	50 V	±20%	3000 Hrs @ 135°C	-55°C ~ 135°C	Active	0.492" Dia (12.50mm)	0.866" (22.00mm)
UBX1H331MHL	Nichicon	330 µF	50 V	±20%	1000 Hrs @ 150°C	-55°C ~ 150°C	Active	0.492" Dia (12.50mm)	0.846" (21.50mm)
UKL1H331KHD	Nichicon	330 µF	50 V	±10%	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	0.492" Dia (12.50mm)	0.846" (21.50mm)
UPS1J331MHD	Nichicon	330 µF	63 V	±20%	3000 Hrs @ 105°C	-55°C ~ 105°C	Not For New Designs	0.492" Dia (12.50mm)	0.866" (22.00mm)
UFW1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	0.394" Dia (10.00mm)	0.630" (16.00mm)
UKW1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Not For New Designs	0.394" Dia (10.00mm)	0.630" (16.00mm)
337CKH063M	Cornell Dubilier / Illinois Capacitor	330 µF	63 V	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	Active	0.492" Dia (12.50mm)	0.846" (21.50mm)
50RX30330M12.5X20	Rubycon	330 µF	50 V	±20%	4000 Hrs @ 130°C	-40°C ~ 130°C	Active	0.492" Dia (12.50mm)	0.866" (22.00mm)
63YXJ330M12.5X20	Rubycon	330 µF	63 V	±20%	10000 Hrs @ 105°C	-40°C ~ 105°C	Active	0.492" Dia (12.50mm)	0.866" (22.00mm)

Engineering Selection Recommendations

Direct Replacement (Same Voltage, Same Size)

For applications requiring identical electrical and mechanical specifications, UBT1H331MHD8, UBW1H331MHD, and UBX1H331MHL from Nichicon are active products with extended lifetime ratings and higher temperature operation. These parts maintain the 50 V rating, 330 µF capacitance, and 0.492" diameter form factor. UBT1H331MHD8 offers 10000 hours at 125°C; UBW1H331MHD provides 3000 hours at 135°C; UBX1H331MHL extends operation to 150°C. All are ROHS3 compliant.

Higher Voltage Rating

UPS1J331MHD and 337CKH063M provide 63 V ratings while maintaining 330 µF capacitance and radial through-hole mounting. These are suitable for applications where voltage margin is required. UPS1J331MHD is marked "Not For New Designs" but remains available. 337CKH063M from Cornell Dubilier is an active product with 2000 hours at 105°C and ROHS3 compliance.

Automotive-Grade Alternatives

50RX30330M12.5X20 from Rubycon is rated for automotive applications with AEC-Q200 compliance, 4000 hours at 130°C, and 50 V rating. 63YXJ330M12.5X20 from Rubycon offers 63 V rating with 10000 hours at 105°C and is suitable for general purpose automotive use.

Compact Form Factor

UFW1H331MPD and UKW1H331MPD provide smaller physical dimensions (0.394" diameter, 0.630" height) while maintaining 330 µF, 50 V specifications. These are marked "Not For New Designs" and are suitable only for space-constrained legacy designs where PCB layout permits the reduced footprint.

Tolerance Consideration

UKL1H331KHD offers tighter ±10% tolerance compared to the standard ±20%, with 2000 hours at 85°C. This part is marked "Not For New Designs" but provides improved capacitance accuracy for applications requiring tighter tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 63 V rated capacitor in place of the 50 V UFG1H331MHM?

A: Yes. Higher voltage ratings are electrically compatible and provide additional voltage margin. Parts such as UPS1J331MHD and 337CKH063M (63 V) are direct mechanical substitutes with identical lead spacing and form factor. Verify PCB layout accommodates the physical dimensions.

Q: What is the difference between "Upgrade" and "Similar" substitute categories?

A: Upgrade substitutes maintain identical electrical and mechanical specifications while offering improved performance (extended lifetime, higher temperature operation, or enhanced ripple current). Similar substitutes have identical electrical ratings but different physical dimensions, typically smaller form factors. Similar parts require PCB layout verification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the original UFG1H331MHM.

Q: Which substitute offers the longest operational lifetime?

A: UBT1H331MHD8 and 63YXJ330M12.5X20 both provide 10000 hours at their respective temperature ratings (125°C and 105°C). Selection depends on the required operating temperature range.

Q: Can I use parts marked "Not For New Designs" in new applications?

A: Parts marked "Not For New Designs" (UKL1H331KHD, UPS1J331MHD, UFW1H331MPD, UKW1H331MPD) are available but not recommended for new designs. Active product alternatives are preferred for long-term supply assurance and design continuity.

Q: What is the significance of lead spacing in substitution?

A: Lead spacing (0.197" / 5.00mm) determines PCB hole pattern compatibility. All listed substitutes maintain this spacing except where noted. Verify PCB layout before selecting parts with different physical dimensions.

Q: Which substitute is suitable for automotive applications?

A: 50RX30330M12.5X20 and 63YXJ330M12.5X20 from Rubycon are designated for automotive use. 50RX30330M12.5X20 carries AEC-Q200 rating. UBT1H331MHD8, UBW1H331MHD, and UBX1H331MHL from Nichicon are also listed for automotive applications.

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