UPB2G330MHD Equivalent & Substitute Parts

Part Overview

The UPB2G330MHD is a 33 µF, 400 V aluminum electrolytic capacitor in radial can package manufactured by Nichicon. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 105°C with a rated lifetime of 5000 hours at 105°C, making it suitable for general-purpose applications requiring stable capacitance and ripple current handling.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ 105°C	5000 Hrs
Operating Temperature Range	-25°C to 105°C
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)
Height (Seated Max)	1.043" (26.50 mm)
Mounting Type	Through Hole
Package	Radial, Can
Ripple Current @ 120 Hz	300 mA
Ripple Current @ 100 kHz	600 mA

Substitute Part Grouping Explanation

Substitution of the UPB2G330MHD is determined by the following critical parameters:

Capacitance Value: Must be 33 µF (±20% tolerance acceptable)
Voltage Rating: Minimum 400 V; higher ratings (450 V) are acceptable as upgrades
Package Geometry: Lead spacing 0.295" (7.50 mm), case diameter 0.630" (16.00 mm), and height compatibility within ±0.020" variation
Mounting Type: Through-hole radial configuration only
Ripple Current Capability: Minimum 300 mA @ 120 Hz and 600 mA @ 100 kHz
Operating Temperature: Minimum -25°C to 105°C range
Polarization: Polar configuration required

Substitute parts are categorized as:

Direct Equivalents: Identical electrical and mechanical specifications (same voltage, capacitance, footprint, lifetime)

Similar Parts: Same electrical specifications with minor dimensional variations or different product status

Upgrade Parts: Higher voltage rating (450 V) or extended lifetime (12000+ hours) with compatible footprint

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Case Dia	Height (Max)	Lead Spacing	Ripple @ 120 Hz	Ripple @ 100 kHz	Status
UPB2G330MHD	Nichicon	33 µF	400 V	5000 Hrs	0.630"	1.043"	0.295"	300 mA	600 mA	Obsolete
ULD2W330MHD	Nichicon	33 µF	450 V	20000 Hrs	0.630"	1.063"	0.295"	392 mA	705.6 mA	Not For New Designs
UCA2G330MHD6	Nichicon	33 µF	400 V	12000 Hrs	0.709"	0.846"	0.295"	320 mA	—	Obsolete
UPT2G330MHD	Nichicon	33 µF	400 V	5000 Hrs	0.492"	1.299"	0.197"	290 mA	464 mA	Active
400BXC33MEFC16X20	Rubycon	33 µF	400 V	12000 Hrs	0.630"	0.866"	0.295"	360 mA	900 mA	Active
400CFX33MEFC16X25	Rubycon	33 µF	400 V	5000 Hrs	0.630"	1.063"	0.295"	320 mA	—	Active
B43858C9336M000	EPCOS - TDK Electronics	33 µF	400 V	5000 Hrs	0.630"	1.063"	0.295"	—	720 mA	Active
450BXC33MEFC16X25	Rubycon	33 µF	450 V	12000 Hrs	0.630"	1.063"	0.295"	392 mA	980 mA	Active
450LLE33MEFC16X25	Rubycon	33 µF	450 V	20000 Hrs	0.630"	1.063"	0.295"	392 mA	980 mA	Active
B43866C9336M	EPCOS - TDK Electronics	33 µF	400 V	5000 Hrs @ 125°C	0.630"	1.063"	0.295"	—	340 mA	Active
B43890A9336M000	EPCOS - TDK Electronics	33 µF	400 V	15000 Hrs	0.630"	1.063"	0.295"	—	818 mA	Active

Engineering Selection Recommendations

Direct Replacement (Same Voltage, Same Footprint)

For applications requiring exact electrical and mechanical compatibility with the UPB2G330MHD, select from active-status parts with matching 400 V rating and 0.295" lead spacing:

400BXC33MEFC16X20 (Rubycon): Active status, 12000-hour lifetime, superior ripple current handling (360 mA @ 120 Hz, 900 mA @ 100 kHz). Height 0.866" is shorter than original.
400CFX33MEFC16X25 (Rubycon): Active status, 5000-hour lifetime matching original, identical footprint dimensions. Height 1.063" accommodates original PCB layout.
B43858C9336M000 (EPCOS - TDK Electronics): Active status, 5000-hour lifetime, 720 mA @ 100 kHz ripple current. Height 1.063" compatible with original mounting.
B43890A9336M000 (EPCOS - TDK Electronics): Active status, extended 15000-hour lifetime, 818 mA @ 100 kHz ripple current. Height 1.063" maintains original spacing.

Voltage Upgrade (450 V Rating)

For applications where higher voltage margin is beneficial:

ULD2W330MHD (Nichicon): 450 V rating, 20000-hour lifetime, 392 mA @ 120 Hz and 705.6 mA @ 100 kHz. Height 1.063" is compatible. Product status is "Not For New Designs."
450BXC33MEFC16X25 (Rubycon): Active status, 450 V rating, 12000-hour lifetime, 392 mA @ 120 Hz and 980 mA @ 100 kHz. Height 1.063" maintains original spacing.
450LLE33MEFC16X25 (Rubycon): Active status, 450 V rating, 20000-hour lifetime, 392 mA @ 120 Hz and 980 mA @ 100 kHz. Height 1.063" compatible.

Extended Temperature Operation

B43866C9336M (EPCOS - TDK Electronics): Active status, 400 V rating, 5000-hour lifetime at 125°C (versus 105°C standard). Operating range -25°C to 125°C. Height 1.063" compatible.

Footprint Variations (Not Recommended for Direct Replacement)

UCA2G330MHD6 (Nichicon): Obsolete status, case diameter 0.709" (larger than original 0.630"), height 0.846" (shorter). Requires PCB layout verification.
UPT2G330MHD (Nichicon): Active status, but lead spacing 0.197" (narrower than original 0.295") and case diameter 0.492" (smaller). Requires PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 400 V UPB2G330MHD?

A: Yes. A higher voltage rating provides additional safety margin and does not degrade circuit performance. The 450 V parts (ULD2W330MHD, 450BXC33MEFC16X25, 450LLE33MEFC16X25) are direct mechanical and electrical substitutes with improved voltage headroom.

Q: What is the significance of the lifetime rating difference (5000 hours versus 12000 or 20000 hours)?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C or 125°C) before capacitance degradation exceeds ±20%. Extended lifetime parts (12000+ hours) provide longer service life in thermally demanding applications. For equivalent thermal conditions, higher lifetime ratings reduce failure risk over the product's operational life.

Q: Are there dimensional constraints I should verify before substitution?

A: Yes. The critical dimensions are lead spacing (0.295"), case diameter (0.630"), and seated height (1.043" maximum for the original). Parts with identical lead spacing and case diameter but different heights (such as 400BXC33MEFC16X20 at 0.866" or 400CFX33MEFC16X25 at 1.063") are mechanically compatible if PCB clearance permits. Parts with different lead spacing (UPT2G330MHD at 0.197") or case diameter (UCA2G330MHD6 at 0.709") require PCB layout verification.

Q: Which substitute part offers the best ripple current performance?

A: The 450LLE33MEFC16X25 and 450BXC33MEFC16X25 both deliver 980 mA @ 100 kHz, compared to the original 600 mA @ 100 kHz. The B43890A9336M000 provides 818 mA @ 100 kHz. Higher ripple current capability reduces thermal stress in high-frequency switching applications.

Q: Should I prioritize active-status parts over obsolete or "Not For New Designs" parts?

A: Yes. Active-status parts ensure long-term availability and ongoing manufacturer support. The UPB2G330MHD is obsolete; ULD2W330MHD is marked "Not For New Designs." Active alternatives include 400BXC33MEFC16X20, 400CFX33MEFC16X25, B43858C9336M000, B43890A9336M000, 450BXC33MEFC16X25, 450LLE33MEFC16X25, and B43866C9336M.

Q: What compliance certifications apply to these substitute parts?

A: All listed substitute parts are ROHS3 compliant and carry ECCN EAR99 classification. REACH status varies: most are REACH Unaffected; ULD2W330MHD is REACH Affected. Verify compliance requirements for your specific application and regulatory jurisdiction.

Q: Can I substitute the UPT2G330MHD despite its different lead spacing?

A: The UPT2G330MHD has 0.197" lead spacing versus the original 0.295", requiring PCB redesign. While electrically equivalent (33 µF, 400 V, 5000-hour lifetime, active status), mechanical incompatibility makes it unsuitable for direct replacement without layout modification.

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