EEU-FC2A121SB Equivalent & Substitute Parts

Part Overview

The EEU-FC2A121SB is a 120 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This capacitor is rated for 5000 hours at 105°C and meets AEC-Q200 automotive standards. The part is currently active and available in Tape & Box packaging. Substitute parts are necessary when the primary packaging format is unavailable, when sourcing from alternative manufacturers is required for supply chain continuity, or when design flexibility permits equivalent electrical and mechanical specifications.

Substiute Parts

EEU-FC2A121SB

Panasonic Electronic ComponentsIn Stock: 785EEU-FC2A121SB Datasheet

Current PartRFQ

EEU-FC2A121S

Panasonic Electronic ComponentsIn Stock: 1425EEU-FC2A121S Datasheet

DirectRFQ

UPJ2A121MHD

NichiconIn Stock: 1784UPJ2A121MHD Datasheet

SimilarRFQ

UPJ2A121MHD6

NichiconIn Stock: 833UPJ2A121MHD6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict equivalence of electrical and mechanical parameters. The following criteria establish valid substitution relationships for the EEU-FC2A121SB:

Primary Equivalence Criteria:

• Capacitance: 120 µF (exact match required)
• Voltage Rating: 100 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 5000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -55°C ~ 105°C (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)

Mechanical Compatibility Criteria:

• Lead Spacing: 0.295" (7.50mm)
• Size / Dimension: 0.630" Dia (16.00mm)
• Height - Seated (Max): 0.650" (16.50mm)

Compliance Criteria:

• RoHS3 Compliant status

Substitute parts are grouped into two categories: direct packaging substitutes (same manufacturer, different packaging) and cross-manufacturer equivalents (different manufacturer, identical electrical and mechanical specifications).

Parameter Comparison

Engineering Selection Recommendations

EEU-FC2A121S (Panasonic, Direct Substitute): This part is the direct equivalent of EEU-FC2A121SB with identical electrical and mechanical specifications. The only difference is packaging format (Bulk versus Tape & Box). This substitute is suitable for all applications where the EEU-FC2A121SB is specified. Both parts carry Active product status and meet AEC-Q200 automotive standards.

UPJ2A121MHD6 (Nichicon, Cross-Manufacturer Equivalent): This part matches all critical electrical and mechanical parameters of the EEU-FC2A121SB, including lead spacing (0.295" / 7.50mm), physical dimensions (0.630" Dia / 16.00mm), and height (0.650" / 16.50mm). However, this part carries "Not For New Designs" product status. Selection of this substitute is limited to legacy system maintenance or where existing inventory constraints require cross-manufacturer sourcing. Both parts are ROHS3 compliant.

UPJ2A121MHD (Nichicon, Not Recommended): This part does not meet mechanical compatibility requirements. Lead spacing (0.197" / 5.00mm), physical dimensions (0.492" Dia / 12.50mm), and height (0.984" / 25.00mm) differ from the EEU-FC2A121SB. PCB layout modifications would be required for installation. This part also carries "Not For New Designs" status and is not suitable as a substitute.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC2A121S be used as a direct replacement for EEU-FC2A121SB?

A: Yes. Both parts are manufactured by Panasonic and share identical electrical specifications (120 µF, 100 V, ±20%, 5000 Hrs @ 105°C) and mechanical dimensions (0.630" Dia, 0.650" height, 0.295" lead spacing). The only difference is packaging format. Both are Active products meeting AEC-Q200 standards.

Q: What is the difference between the Panasonic and Nichicon substitutes?

A: EEU-FC2A121S is a Panasonic part with Active product status. UPJ2A121MHD6 is a Nichicon part with "Not For New Designs" status. Both share identical electrical and mechanical specifications. UPJ2A121MHD is a Nichicon part with different mechanical dimensions and is not compatible.

Q: Can UPJ2A121MHD be used instead of EEU-FC2A121SB?

A: No. UPJ2A121MHD has different lead spacing (0.197" versus 0.295"), different physical diameter (0.492" versus 0.630"), and different height (0.984" versus 0.650"). These mechanical differences require PCB layout modifications and make this part incompatible without design changes.

Q: Why is UPJ2A121MHD6 marked "Not For New Designs"?

A: "Not For New Designs" indicates the manufacturer has discontinued active development of this product line. While the part remains functionally equivalent and available in inventory, it is intended for legacy system support only. For new designs, EEU-FC2A121SB or EEU-FC2A121S are the recommended selections.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. EEU-FC2A121SB, EEU-FC2A121S, UPJ2A121MHD, and UPJ2A121MHD6 are all ROHS3 compliant.

Q: What determines whether a part can substitute for EEU-FC2A121SB?

A: Substitution requires exact equivalence in capacitance (120 µF), voltage rating (100 V), tolerance (±20%), lifetime (5000 Hrs @ 105°C), operating temperature range (-55°C ~ 105°C), polarization (Polar), mounting type (Through Hole), package type (Radial, Can), and mechanical dimensions (lead spacing, diameter, height). Any deviation in these parameters disqualifies the part as a substitute.