EEU-FS1C121 Equivalent & Substitute Parts

Part Overview

The EEU-FS1C121 is a 120 µF, 16 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This component is rated for 5000 hours at 105°C and is designed for general-purpose applications requiring reliable energy storage and filtering in through-hole PCB assemblies. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are required due to inventory constraints, lead time considerations, or application-specific performance needs.

Substiute Parts

EEU-FS1C121

Panasonic Electronic ComponentsIn Stock: 689EEU-FS1C121 Datasheet

Current PartRFQ

16ZLJ120M5X11

RubyconIn Stock: 331516ZLJ120M5X11 Datasheet

DirectRFQ

EKYB160ELL121ME11D

Chemi-ConIn Stock: 3834EKYB160ELL121ME11D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EEU-FS1C121 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Capacitance: 120 µF
• Voltage Rating: 16 V
• Tolerance: ±20%
• Polarization: Polar

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: Radial, Can
• Lead Spacing: 0.079" (2.00mm)
• Size / Dimension: 0.197" Dia (5.00mm)
• Height - Seated (Max): 0.492" (12.50mm)

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Operating Temperature Range: -40°C ~ 105°C

Two substitute parts meet these criteria: the Rubycon 16ZLJ120M5X11 (Direct Manufacturer Part) and the Chemi-Con EKYB160ELL121ME11D (Parametric Equivalent).

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and ROHS3 compliance, qualifying them for equivalent use in applications requiring 120 µF, 16 V aluminum electrolytic capacitors with radial through-hole configuration.

The Rubycon 16ZLJ120M5X11 offers extended lifetime (7000 hours at 105°C versus 5000 hours) and higher ripple current ratings at both low and high frequencies, providing enhanced performance margin in applications subject to sustained thermal or electrical stress.

The Chemi-Con EKYB160ELL121ME11D provides the lowest impedance (290 mOhms) among the three options, suitable for applications requiring minimal voltage drop across the capacitor during transient current events.

Selection between these parts should be based on application-specific requirements for thermal endurance, ripple current handling, and impedance characteristics, with all three parts meeting the fundamental electrical and mechanical compatibility criteria for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the Rubycon 16ZLJ120M5X11 be used as a direct replacement for the Panasonic EEU-FS1C121?

A: Yes. Both parts share identical electrical ratings (120 µF, 16 V, ±20% tolerance), mechanical dimensions (5.00mm diameter, 12.50mm height, 2.00mm lead spacing), mounting type (through-hole radial), and compliance certifications (ROHS3). The Rubycon part is a direct substitute with no PCB layout or circuit modifications required.

Q: What is the difference between a Direct Manufacturer Part and a Parametric Equivalent?

A: A Direct Manufacturer Part (16ZLJ120M5X11) is explicitly listed as an approved substitute by the original manufacturer. A Parametric Equivalent (EKYB160ELL121ME11D) meets all specified electrical and mechanical parameters but is not formally designated as an approved substitute. Both are functionally interchangeable based on matching specifications.

Q: Are there any performance differences between these three capacitors?

A: Yes. The Rubycon part offers 7000-hour lifetime versus 5000 hours for the other two. Ripple current ratings vary: Rubycon provides the highest ratings (225 mA @ 120 Hz, 450 mA @ 100 kHz), while Chemi-Con provides the lowest impedance (290 mOhms). These differences do not affect basic compatibility but may influence performance in high-ripple or thermally demanding applications.

Q: Can these parts be used interchangeably on the same PCB without rework?

A: Yes. All three parts have identical lead spacing (2.00mm), case diameter (5.00mm), and seated height (12.50mm), ensuring direct PCB footprint compatibility without layout modifications or rework.

Q: Are all three parts currently in stock?

A: Inventory status is provided for reference: Panasonic EEU-FS1C121 (632 pcs), Rubycon 16ZLJ120M5X11 (3277 pcs), Chemi-Con EKYB160ELL121ME11D (3739 pcs). Availability should be confirmed with the component supplier at the time of procurement.