EEU-FS1K561L Equivalent & Substitute Parts

Part Overview

The EEU-FS1K561L is a 560 µF, 80 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the FS-A series. This radial, through-hole component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring stable capacitance and ripple current handling. The part is currently in active production status.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design flexibility permits selection from qualified alternatives that meet identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	560 µF
Voltage Rating	80 V
Tolerance	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Lead Spacing	0.197" (5.00 mm)
Package Type	Radial, Can
Mounting Type	Through Hole
Size / Dimension	0.492" Dia (12.50 mm)
Height - Seated (Max)	1.457" (37.00 mm)

Substitute Part Grouping Explanation

Substitution eligibility for the EEU-FS1K561L is determined by strict equivalence across the following parameters:

Capacitance value: 560 µF (exact match required)
Voltage rating: 80 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime rating: 10,000 Hrs @ 105°C (exact match required)
Operating temperature range: -40°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)
Lead spacing: 0.197" (5.00 mm) (exact match required)
Physical dimensions: 0.492" Dia × 1.457" Height (exact match required)

The substitute part UHW1K561MHD from Nichicon meets all these criteria and qualifies as a parametric equivalent.

Parameter Comparison

Parameter	EEU-FS1K561L (Panasonic)	UHW1K561MHD (Nichicon)
Capacitance	560 µF	560 µF
Voltage Rating	80 V	80 V
Tolerance	±20%	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)
Package Type	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole
Size / Dimension	0.492" Dia (12.50 mm)	0.492" Dia (12.50 mm)
Height - Seated (Max)	1.457" (37.00 mm)	1.457" (37.00 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The EEU-FS1K561L is the primary selection for new designs, as it maintains active product status with full manufacturer support and availability. The Panasonic FS-A series offers established supply chain reliability and consistent performance documentation.

The UHW1K561MHD from Nichicon is classified as "Not For New Designs" and should be reserved for legacy system maintenance, field replacements, or applications where supply of the primary part is unavailable. Both parts carry identical RoHS3 and REACH compliance certifications, ensuring regulatory equivalence in restricted substance management.

Selection between these parts should be based on availability and application context rather than electrical performance, as both meet all specified parameters identically.

Frequently Asked Questions (FAQ)

Q: Can UHW1K561MHD be used as a direct replacement for EEU-FS1K561L in new designs?

A: No. The UHW1K561MHD carries a "Not For New Designs" status. New designs should specify the EEU-FS1K561L. The Nichicon part is suitable only for field replacements or legacy system support where the original part is unavailable.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical lead spacing (0.197" / 5.00 mm), diameter (0.492" / 12.50 mm), and maximum seated height (1.457" / 37.00 mm). PCB footprints and mounting requirements are interchangeable.

Q: What are the differences in ripple current ratings?

A: The EEU-FS1K561L specifies 1.785 A @ 120 Hz and 2.38 A @ 100 kHz. The UHW1K561MHD specifies 1.3 A @ 120 Hz and 2.6 A @ 100 kHz. These differences do not affect substitution eligibility, as ripple current is not a substitution criterion for this product category. Application-specific ripple current requirements must be evaluated independently.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the EEU-FS1K561L and UHW1K561MHD are ROHS3 compliant and REACH unaffected, meeting current environmental and restricted substance requirements.

Q: What is the inventory status for each part?

A: The EEU-FS1K561L has 1,059 pieces in stock. The UHW1K561MHD has 909 pieces in stock. Availability should be confirmed with the supplier before design decisions are finalized.

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