UPJ2A390MPD Equivalent & Substitute Parts

Part Overview

The UPJ2A390MPD is a 39 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product line. For new applications or when stock becomes unavailable, equivalent substitute parts from active product series are necessary to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	Value
Capacitance	39 µF
Voltage Rating	100 V
Tolerance	±20%
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Operating Temperature Range	-55°C ~ 105°C
Lifetime @ 105°C	3000 Hrs

Substitute Part Grouping Explanation

Substitute parts for the UPJ2A390MPD are qualified based on the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Capacitance: 39 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)

Mechanical Compatibility Criteria:

Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)

Acceptable Variations:

Lead Spacing: May vary within through-hole PCB design constraints
Physical Dimensions (diameter and height): May vary within available board space
Lifetime @ 105°C: May be lower than original (2000 Hrs acceptable for general purpose applications)
Ripple Current Ratings: May vary; selection depends on circuit requirements

All substitute parts listed are from Panasonic Electronic Components, series FC, and maintain active product status with AEC-Q200 automotive qualification.

Parameter Comparison

Parameter	UPJ2A390MPD (Nichicon)	EEU-FC2A390 (Panasonic)	EEU-FC2A390B (Panasonic)	EEU-FC2A390L (Panasonic)	EEU-FC2A390LB (Panasonic)	EEU-FC2A390LJ (Panasonic)
Capacitance	39 µF	39 µF	39 µF	39 µF	39 µF	39 µF
Voltage Rating	100 V	100 V	100 V	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs
Polarization	Polar	Polar	Polar	Polar	Polar	Polar
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.138" (4.60mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.295" (7.50mm)
Diameter	0.315" (8.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.315" (8.00mm)	0.315" (8.00mm)	0.630" (16.00mm)
Height (Max)	0.827" (21.00mm)	0.669" (17.00mm)	0.669" (17.00mm)	0.866" (22.00mm)	1.024" (26.00mm)	1.476" (37.50mm)
Impedance	330 mOhms	360 mOhms	360 mOhms	330 mOhms	330 mOhms	330 mOhms
Ripple Current @ 120 Hz	202 mA	260 mA	260 mA	295.8 mA	295.8 mA	295.8 mA
Ripple Current @ 10 kHz / 100 kHz	352 mA @ 10 kHz	—	400 mA @ 100 kHz	455 mA @ 100 kHz	455 mA @ 100 kHz	455 mA @ 100 kHz
Product Status	Not For New Designs	Active	Active	Active	Active	Active
Compliance	ROHS3, REACH Unaffected	ROHS3, REACH Unaffected, AEC-Q200	ROHS3, REACH Unaffected, AEC-Q200	ROHS3, REACH Unaffected, AEC-Q200	ROHS3, REACH Unaffected, AEC-Q200	ROHS3, REACH Unaffected, AEC-Q200

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): EEU-FC2A390L is the closest electrical and mechanical equivalent to the UPJ2A390MPD. It maintains identical capacitance, voltage, tolerance, and operating temperature specifications. The diameter matches at 0.315" (8.00mm), and impedance is identical at 330 mOhms. Height is marginally greater at 0.866" (22.00mm) versus 0.827" (21.00mm), which is acceptable for most through-hole PCB layouts. This part carries active product status and AEC-Q200 automotive qualification.

Alternative Substitutes (Space-Constrained Applications): EEU-FC2A390 offers the lowest profile at 0.669" (17.00mm) height but features a larger diameter of 0.394" (10.00mm) and increased lead spacing of 0.197" (5.00mm). This variant is suitable when vertical PCB space is limited but horizontal spacing permits the larger footprint. It maintains 3000 Hrs lifetime at 105°C, matching the original specification.

Extended Height Applications: EEU-FC2A390LB and EEU-FC2A390LJ accommodate designs with greater available vertical clearance. EEU-FC2A390LB reaches 1.024" (26.00mm) with standard 0.197" (5.00mm) lead spacing. EEU-FC2A390LJ extends to 1.476" (37.50mm) with 0.295" (7.50mm) lead spacing, suitable for applications requiring maximum ripple current handling at 455 mA @ 100 kHz.

All substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's environmental status. All Panasonic FC series substitutes carry AEC-Q200 automotive qualification, providing enhanced reliability assurance beyond the original Nichicon UPJ series designation.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC2A390 be used as a direct drop-in replacement for UPJ2A390MPD? A: EEU-FC2A390 is electrically equivalent but requires PCB layout verification. The lead spacing increases from 4.60mm to 5.00mm, and the diameter increases from 8.00mm to 10.00mm. Physical board space must accommodate these dimensional changes. If the original PCB layout cannot be modified, EEU-FC2A390L is the preferred substitute with matching 8.00mm diameter.

Q: What is the difference between EEU-FC2A390L, EEU-FC2A390LB, and EEU-FC2A390LJ? A: These three parts are electrically identical (39 µF, 100 V, ±20%, 2000 Hrs @ 105°C) but differ in physical dimensions and lead spacing. EEU-FC2A390L has 0.197" (5.00mm) lead spacing and 0.866" (22.00mm) height. EEU-FC2A390LB maintains the same lead spacing but extends to 1.024" (26.00mm) height. EEU-FC2A390LJ uses wider 0.295" (7.50mm) lead spacing and reaches 1.476" (37.50mm) height. Selection depends on available PCB space and ripple current requirements.

Q: Why do some substitutes have 2000 Hrs lifetime instead of 3000 Hrs at 105°C? A: The EEU-FC2A390L, EEU-FC2A390LB, and EEU-FC2A390LJ variants are rated for 2000 Hrs @ 105°C, which is acceptable for general purpose applications. The original UPJ2A390MPD specifies 3000 Hrs. For applications requiring extended thermal life, EEU-FC2A390 or EEU-FC2A390B (both 3000 Hrs) are recommended, though they require PCB layout accommodation for larger physical dimensions.

Q: Are all substitute parts automotive-qualified? A: Yes. All Panasonic EEU-FC series substitutes carry AEC-Q200 automotive qualification. The original Nichicon UPJ2A390MPD does not list automotive qualification. This makes the Panasonic substitutes suitable for automotive applications where the original part would not be approved.

Q: What is the impact of impedance differences between parts? A: The original UPJ2A390MPD has 330 mOhms impedance. EEU-FC2A390 and EEU-FC2A390B have 360 mOhms, a 30 mOhms increase. EEU-FC2A390L, EEU-FC2A390LB, and EEU-FC2A390LJ return to 330 mOhms. For most general purpose filtering applications, this variation is negligible. High-frequency ripple filtering circuits should prioritize parts with matching impedance specifications.

Q: Can I use a substitute with different lead spacing on an existing PCB? A: Lead spacing changes require PCB modification. The original UPJ2A390MPD uses 4.60mm spacing. Most Panasonic substitutes use 5.00mm or 7.50mm spacing. If PCB drilling cannot be modified, only EEU-FC2A390L (5.00mm spacing) can be used with minor pad adjustment, or the board must be redesigned. Consult PCB layout guidelines before proceeding with substitution.

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