EEU-FC1C181B Equivalent & Substitute Parts

Part Overview

The EEU-FC1C181B is a 180 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Panasonic Electronic Components. This part is classified as obsolete, with a rated lifetime of 1000 hours at 105°C and AEC-Q200 automotive qualification. Due to its obsolete status, equivalent substitute parts with improved specifications or active production status are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Capacitance	180 µF
Voltage Rating	16 V
Tolerance	±20%
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Operating Temperature Range	-55°C ~ 105°C
Lifetime @ 105°C	1000 Hrs
Ripple Current @ 120 Hz	260 mA
Ripple Current @ 100 kHz	400 mA
Impedance	250 mOhms
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.248" (6.30 mm)
Height	0.728" (18.50 mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

Capacitance: 180 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 16 V or higher (equal or greater voltage acceptable)
Polarization: Polar (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)

Secondary Considerations:

Lifetime @ 105°C: Minimum 1000 hours (equal or greater acceptable)
Lead Spacing: Mechanical compatibility with PCB layout
Case Diameter and Height: Physical fit within design constraints
Ripple Current Ratings: Must meet or exceed application requirements
Impedance: Lower impedance values indicate improved performance

Substitute parts are grouped into two categories:

Direct Upgrade (EEU-FC1E181B): Same manufacturer (Panasonic), same series (FC), higher voltage rating (25 V), improved lifetime (2000 Hrs), active product status.
Cross-Manufacturer Equivalents (Chemi-Con, Nichicon): Alternative manufacturers with identical or superior electrical specifications, maintaining all critical parameters while offering different product status or availability.

Parameter Comparison

Parameter	EEU-FC1C181B	EEU-FC1E181B	ELXY160ELL181MF15D	UPJ1C181MED	UPM1C181MED	UPV1C181MGD	UPW1C181MED
Manufacturer	Panasonic	Panasonic	Chemi-Con	Nichicon	Nichicon	Nichicon	Nichicon
Series	FC	FC	LXY	UPJ	UPM	UPV	UPW
Capacitance	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF
Voltage Rating	16 V	25 V	16 V	16 V	16 V	16 V	16 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	1000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs	2000 Hrs	5000 Hrs	2000 Hrs
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	-55°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar	Polar	Polar
Package Type	Radial, Can	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	Through Hole
Ripple Current @ 120 Hz	260 mA	360.8 mA	156 mA	285 mA	285 mA	Not specified	279.5 mA
Ripple Current @ 100 kHz	400 mA	555 mA	390 mA	405 mA @ 10 kHz	405 mA @ 10 kHz	Not specified	430 mA
Impedance	250 mOhms	117 mOhms	250 mOhms	310 mOhms	200 mOhms	340 mOhms	230 mOhms
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.138" (4.60 mm)	0.098" (2.50 mm)
Case Diameter	0.248" (6.30 mm)	0.315" (8.00 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)	0.315" (8.00 mm)	0.248" (6.30 mm)
Height	0.728" (18.50 mm)	0.650" (16.50 mm)	0.650" (16.50 mm)	0.630" (16.00 mm)	0.650" (16.50 mm)	0.512" (13.00 mm)	0.591" (15.00 mm)
Product Status	Obsolete	Active	Active	Obsolete	Obsolete	Not For New Designs	Obsolete
AEC-Q200 Rating	Yes	Yes	Yes	No	Yes	No	No
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Automotive Applications with AEC-Q200 Requirement:

EEU-FC1E181B is the primary recommendation. It maintains Panasonic FC series continuity, carries AEC-Q200 automotive qualification, offers active product status, and provides doubled lifetime (2000 Hrs vs. 1000 Hrs). The 25 V rating provides additional voltage margin. Lead spacing remains identical (5.00 mm), ensuring direct PCB compatibility. Case diameter increases from 6.30 mm to 8.00 mm and height decreases from 18.50 mm to 16.50 mm; verify physical fit within the design envelope.

UPM1C181MED provides an alternative with AEC-Q200 qualification, active Nichicon UPM series, and improved impedance (200 mOhms vs. 250 mOhms). Lead spacing differs (2.50 mm vs. 5.00 mm), requiring PCB layout verification. Case diameter and height are compatible with the original design footprint.

For General Purpose Applications:

ELXY160ELL181MF15D (Chemi-Con LXY series) maintains identical electrical specifications and case diameter (6.30 mm) with improved lifetime (2000 Hrs). Lead spacing differs (2.50 mm vs. 5.00 mm). Active product status supports ongoing availability.

UPW1C181MED (Nichicon UPW series) offers the highest inventory availability (16,814 Pcs) with equivalent electrical performance and compatible physical dimensions. Lead spacing differs (2.50 mm vs. 5.00 mm).

For Extended Lifetime Requirements:

UPV1C181MGD provides the longest rated lifetime (5000 Hrs @ 105°C). Product status is "Not For New Designs," limiting suitability for new development. Lead spacing (4.60 mm) and case diameter (8.00 mm) differ from the original, requiring design verification.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC1E181B directly replace EEU-FC1C181B without PCB modification?

A: Electrical substitution is direct. Physical compatibility requires verification. Lead spacing remains identical (5.00 mm). Case diameter increases from 6.30 mm to 8.00 mm, and height decreases from 18.50 mm to 16.50 mm. Confirm available PCB space before implementation.

Q: Why do some substitutes have different lead spacing?

A: Lead spacing (pitch) is determined by manufacturer design standards and series specifications. Parts with 2.50 mm lead spacing (UPJ1C181MED, UPM1C181MED, UPW1C181MED) require PCB layout adjustment. Parts with 5.00 mm lead spacing (EEU-FC1E181B) maintain original footprint compatibility. Parts with 4.60 mm lead spacing (UPV1C181MGD) require intermediate verification.

Q: Is the higher voltage rating (25 V) in EEU-FC1E181B a concern?

A: No. Higher voltage rating provides additional safety margin and does not degrade performance in 16 V applications. The capacitor operates within its rated voltage envelope and maintains all electrical characteristics.

Q: Which substitute is recommended for automotive production?

A: EEU-FC1E181B is the primary choice, maintaining Panasonic FC series continuity and AEC-Q200 automotive qualification. UPM1C181MED provides an alternative with AEC-Q200 qualification from Nichicon. Both support automotive applications with verified compliance.

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

A: Lower impedance indicates improved high-frequency performance and reduced voltage ripple. EEU-FC1E181B (117 mOhms) offers superior impedance compared to the original (250 mOhms). UPM1C181MED (200 mOhms) provides intermediate improvement. Impedance differences are beneficial for ripple current handling and thermal performance.

Q: Can obsolete-status parts be used in new designs?

A: Obsolete parts (EEU-FC1C181B, UPJ1C181MED, UPM1C181MED, UPW1C181MED) are not recommended for new designs due to limited future availability and potential supply discontinuation. Active-status parts (EEU-FC1E181B, ELXY160ELL181MF15D) support long-term production requirements.

Q: What is the difference between "Obsolete" and "Not For New Designs" status?

A: Obsolete status indicates the part is no longer manufactured and existing inventory is depleted. "Not For New Designs" status indicates the manufacturer no longer recommends the part for new applications but may maintain limited inventory. Both statuses present supply risk for production planning.

Q: Are all substitutes RoHS3 compliant?

A: EEU-FC1C181B shows REACH Unaffected status. All substitute parts (EEU-FC1E181B, ELXY160ELL181MF15D, UPJ1C181MED, UPM1C181MED, UPV1C181MGD, UPW1C181MED) are ROHS3 Compliant, meeting current environmental regulations.

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