EEU-FC1V821 Equivalent & Substitute Parts

Part Overview

The EEU-FC1V821 is a 820 µF, 35 V aluminum electrolytic capacitor in radial, can package manufactured by Panasonic Electronic Components. This part is rated for 5000 hours at 105°C and meets AEC-Q200 automotive standards. The product status is Active, making it suitable for new designs. Equivalent and substitute parts are necessary when addressing supply chain constraints, lead time requirements, or specific mechanical fit considerations in board layouts where dimensional variations between manufacturers impact PCB assembly.

Key Parameters

Parameter	Value
Capacitance	820 µF
Voltage Rating	35 V
Tolerance	±20%
Lifetime @ Temperature	5000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.295" (7.50mm)
Diameter	0.709" (18.00mm)
Height	0.591" (15.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EEU-FC1V821 is determined by the following mandatory parameters:

Capacitance: 820 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime @ Temperature: 5000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)

Substitute parts are grouped into two categories based on mechanical compatibility:

Category A - Same Footprint (Lead Spacing 0.295" / 7.50mm): Parts with identical lead spacing and compatible dimensional envelope for direct PCB replacement without layout modification.

Category B - Alternate Footprint (Lead Spacing 0.197" / 5.00mm): Parts with different lead spacing requiring PCB layout adjustment or mechanical adaptation.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp	Lead Spacing	Diameter	Height	Impedance	Product Status	AEC-Q200
EEU-FC1V821	Panasonic	820 µF	35 V	±20%	5000 Hrs	-55°C ~ 105°C	0.295" (7.50mm)	0.709" (18.00mm)	0.591" (15.00mm)	38 mOhms	Active	Yes
EEU-FC1V821L	Panasonic	820 µF	35 V	±20%	5000 Hrs	-55°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	0.984" (25.00mm)	30 mOhms	Active	Yes
UPJ1V821MHD	Nichicon	820 µF	35 V	±20%	5000 Hrs	-55°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	1.043" (26.50mm)	42 mOhms	Not For New Designs	No
UPJ1V821MHD6	Nichicon	820 µF	35 V	±20%	5000 Hrs	-55°C ~ 105°C	0.295" (7.50mm)	0.709" (18.00mm)	0.650" (16.50mm)	60 mOhms	Not For New Designs	No
UPM1V821MHD6	Nichicon	820 µF	35 V	±20%	5000 Hrs	-55°C ~ 105°C	0.295" (7.50mm)	0.709" (18.00mm)	0.669" (17.00mm)	38 mOhms	Not For New Designs	Yes

Engineering Selection Recommendations

For Active Product Status (New Designs):

EEU-FC1V821L (Panasonic) is the only substitute part with Active product status. This part maintains identical electrical specifications and AEC-Q200 compliance. Selection requires PCB layout modification due to 0.197" (5.00mm) lead spacing versus the original 0.295" (7.50mm). The increased height of 0.984" (25.00mm) must be verified against available board clearance.

For Existing Designs or Legacy Support:

UPM1V821MHD6 (Nichicon) provides the closest mechanical compatibility with identical lead spacing (0.295" / 7.50mm) and maintains AEC-Q200 automotive certification. Product status is Not For New Designs. Height is 0.669" (17.00mm), requiring clearance verification. Impedance is 38 mOhms, matching the original specification.

UPJ1V821MHD6 (Nichicon) also matches lead spacing (0.295" / 7.50mm) but has higher impedance (60 mOhms) and lacks AEC-Q200 certification. Product status is Not For New Designs.

UPJ1V821MHD (Nichicon) requires PCB layout modification due to 0.197" (5.00mm) lead spacing. Product status is Not For New Designs and lacks AEC-Q200 certification.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC1V821L be used as a direct replacement without PCB modification?

A: No. EEU-FC1V821L has lead spacing of 0.197" (5.00mm) compared to the original 0.295" (7.50mm). PCB layout modification is required. Height is also increased to 0.984" (25.00mm).

Q: Which substitute part maintains the same footprint as EEU-FC1V821?

A: UPJ1V821MHD6 and UPM1V821MHD6 both have identical lead spacing of 0.295" (7.50mm). UPM1V821MHD6 is preferred due to AEC-Q200 certification and matching impedance of 38 mOhms.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts meet ROHS3 compliance requirements.

Q: What is the impact of impedance differences between parts?

A: Impedance values provided (30–60 mOhms) reflect manufacturing variations within the same capacitance and voltage class. All parts meet the 5000-hour lifetime specification at 105°C. Circuit performance impact depends on ripple current filtering requirements at specific frequencies.

Q: Can parts marked "Not For New Designs" be used in new applications?

A: Parts with "Not For New Designs" status indicate discontinued or legacy product lines. Use is limited to replacement or legacy system support. For new designs, EEU-FC1V821 (Active) or EEU-FC1V821L (Active) are the appropriate selections.

Q: What is the difference between Panasonic FC and Nichicon UPJ/UPM series?

A: Both series meet the specified 820 µF, 35 V, 5000-hour rating. Panasonic FC series parts maintain Active status. Nichicon UPJ series is Not For New Designs. Nichicon UPM series is Not For New Designs but retains AEC-Q200 certification.

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