EEU-FC1C121B Equivalent & Substitute Parts

Part Overview

The EEU-FC1C121B is a 120 µF, 16 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This component is rated for 1000 hours at 105°C and meets AEC-Q200 automotive standards. The part is currently active in production with 903 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, when packaging requirements differ, or when design specifications allow for alternative manufacturers meeting equivalent electrical and mechanical parameters. The parts listed below share the same core electrical specifications while differing in packaging, lead spacing, height, impedance, or product lifecycle status.

Substiute Parts

EEU-FC1C121B

Panasonic Electronic ComponentsIn Stock: 929EEU-FC1C121B Datasheet

Current PartRFQ

EEU-FC1C121

Panasonic Electronic ComponentsIn Stock: 13704EEU-FC1C121 Datasheet

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EEU-FC1C121H

Panasonic Electronic ComponentsIn Stock: 6629EEU-FC1C121H Datasheet

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UPJ1C121MED

NichiconIn Stock: 8937UPJ1C121MED Datasheet

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UPM1C121MED

NichiconIn Stock: 19612UPM1C121MED Datasheet

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UPW1C121MED

NichiconIn Stock: 4080UPW1C121MED Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EEU-FC1C121B is determined by the following criteria:

Electrical Parameters (Must Match):

• Capacitance: 120 µF
• Voltage Rating: 16 V
• Tolerance: ±20%
• Polarization: Polar
• Operating Temperature Range: -55°C to 105°C

Mechanical Parameters (Must Be Compatible):

• Package Type: Radial, Can
• Mounting Type: Through Hole
• Lead Spacing: 0.098" (2.50mm) or 0.197" (5.00mm)
• Diameter: 0.248" (6.30mm)
• Height: 0.433" to 0.579" (11.00mm to 14.70mm)

Acceptable Variations:

• Lifetime @ 105°C: 1000 Hrs or greater
• Impedance: Variation acceptable within component tolerance
• Ripple Current: Variation acceptable within component tolerance
• Packaging Format: Cut Tape (CT) or Bulk
• Product Status: Active or Obsolete (with engineering review)
• Manufacturer: Panasonic or Nichicon

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

EEU-FC1C121H and EEU-FC1C121 are direct Panasonic equivalents with identical electrical specifications and AEC-Q200 automotive compliance. Selection between these and the main part depends on packaging requirements and lead spacing compatibility with PCB design. EEU-FC1C121H is available in Cut Tape packaging matching the original part format. EEU-FC1C121 is available in Bulk packaging with reduced lead spacing (2.50mm vs. 5.00mm).

Secondary Substitutes (Obsolete Status):

UPJ1C121MED, UPM1C121MED, and UPW1C121MED are Nichicon alternatives with extended lifetime ratings (2000 Hrs @ 105°C vs. 1000 Hrs). These parts are obsolete but remain in inventory. UPM1C121MED carries AEC-Q200 automotive certification. Impedance values differ across the Nichicon series (250–450 mOhms), which may affect ripple current performance in specific circuit applications. Lead spacing is standardized at 2.50mm across all Nichicon options.

Compliance Considerations:

All listed parts maintain ROHS3 compliance and REACH unaffected status. Automotive applications should prioritize parts with AEC-Q200 certification: EEU-FC1C121B, EEU-FC1C121H, EEU-FC1C121, and UPM1C121MED.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC1C121H replace EEU-FC1C121B directly?

A: Yes, for applications where lead spacing of 2.50mm is acceptable. Both parts share identical electrical specifications (120 µF, 16 V, ±20%, 1000 Hrs @ 105°C) and AEC-Q200 certification. The primary difference is lead spacing: EEU-FC1C121B uses 5.00mm spacing while EEU-FC1C121H uses 2.50mm spacing. PCB layout compatibility must be verified.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for automated assembly lines. Bulk packaging provides loose components in larger quantities. Electrical and mechanical specifications remain identical. Selection depends on manufacturing process requirements and inventory management practices.

Q: Are Nichicon parts suitable for automotive applications?

A: UPM1C121MED carries AEC-Q200 automotive certification and is suitable for automotive use. UPJ1C121MED and UPW1C121MED do not carry AEC-Q200 certification and are rated for general purpose applications. For automotive designs, Panasonic FC series parts or UPM1C121MED are recommended.

Q: Why do Nichicon parts have longer lifetime ratings?

A: UPJ1C121MED, UPM1C121MED, and UPW1C121MED are rated for 2000 Hrs @ 105°C compared to 1000 Hrs for Panasonic FC series. Extended lifetime indicates different internal construction and electrolyte formulation. Both ratings meet or exceed typical application requirements; selection depends on design margin requirements.

Q: Can I use a part with different impedance?

A: Impedance variation is acceptable within component tolerance ranges. Impedance affects ripple current handling and high-frequency performance. UPW1C121MED has the lowest impedance (250 mOhms), while UPJ1C121MED has the highest (450 mOhms). Circuit performance should be evaluated if impedance differs significantly from the original design specification.

Q: What does "Obsolete" product status mean?

A: Obsolete status indicates the manufacturer has discontinued production. Nichicon UPJ, UPM, and UPW series parts are obsolete but remain available in current inventory. For new designs, active parts (Panasonic FC series) are recommended. Obsolete parts may be used in legacy system repairs or when inventory is available.