EEF-SX0J121E7 Equivalent & Substitute Parts

Part Overview

The EEF-SX0J121E7 is a 120 µF, 6.3 V aluminum polymer surface mount capacitor manufactured by Panasonic Electronic Components. This component is part of the SP-Cap SX series and is actively produced. The part is housed in a 2917 (7343 Metric) package with a maximum seated height of 2.00mm and features a 7mOhm equivalent series resistance (ESR) rating.

Substitute parts are identified when equivalent electrical and mechanical specifications are maintained within the allowed tolerances for this product category, ensuring functional compatibility in target applications.

Substiute Parts

EEF-SX0J121E7

Panasonic Electronic ComponentsIn Stock: 1840EEF-SX0J121E7 Datasheet

Current PartRFQ

EEF-CX0J121R

Panasonic Electronic ComponentsIn Stock: 27764EEF-CX0J121R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-SX0J121E7 is determined by the following critical parameters:

• Capacitance value: 120 µF (exact match required)
• Voltage rating: 6.3 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C ~ 105°C (exact match required)
• Lifetime @ Temperature: 2000 Hrs @ 105°C (exact match required)
• RoHS and REACH compliance status (exact match required)

The EEF-CX0J121R meets all substitution criteria. Variations in ESR, ripple current capacity, and seated height are within acceptable engineering tolerances for this product category and do not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the EEF-SX0J121E7 and EEF-CX0J121R are active products manufactured by Panasonic Electronic Components and maintain full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on application-specific requirements for ESR and ripple current performance. The EEF-SX0J121E7 provides lower ESR (7mOhm) and higher ripple current capacity (7 A @ 100 kHz), while the EEF-CX0J121R offers a lower seated height (1.90mm versus 2.00mm) with higher ESR (15mOhm) and reduced ripple current capacity (5.1 A @ 100 kHz).

Frequently Asked Questions (FAQ)

Q: Can the EEF-CX0J121R be used as a direct replacement for the EEF-SX0J121E7?

A: The EEF-CX0J121R is functionally equivalent based on capacitance, voltage rating, tolerance, package type, and operating temperature specifications. However, the higher ESR and lower ripple current rating of the EEF-CX0J121R may affect performance in applications with stringent high-frequency ripple current requirements.

Q: What is the difference in seated height between these parts?

A: The EEF-SX0J121E7 has a maximum seated height of 2.00mm, while the EEF-CX0J121R has a maximum seated height of 1.90mm. Both parts use the same 2917 (7343 Metric) package footprint and are compatible with identical PCB land patterns.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the EEF-SX0J121E7 and EEF-CX0J121R are ROHS3 compliant and REACH unaffected.

Q: What applications are these capacitors suitable for?

A: Both parts are rated for general purpose applications and operate across the temperature range of -55°C to 105°C with a rated lifetime of 2000 hours at 105°C.