SPA121M06R Equivalent & Substitute Parts

Part Overview

The SPA121M06R is a 120 µF, 6.3 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part is RoHS3 compliant and suitable for general purpose applications requiring low equivalent series resistance and stable performance across the operating temperature range of -40°C to 105°C.

Substiute Parts

SPA121M06R

Cornell Dubilier Electronics (CDE)In Stock: 743SPA121M06R Datasheet

Current PartRFQ

EEF-SX0J121E7

Panasonic Electronic ComponentsIn Stock: 1840EEF-SX0J121E7 Datasheet

DirectRFQ

EEF-CX0J121R

Panasonic Electronic ComponentsIn Stock: 27764EEF-CX0J121R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPA121M06R is determined by strict equivalence in the following parameters:

Critical Matching Parameters:

• Capacitance: 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)
• Type: Aluminum Polymer (exact match required)

Allowable Variations:

• ESR (Equivalent Series Resistance): May be equal to or lower than the original specification
• Lifetime @ Temperature: May be equal to or greater than the original specification
• Operating Temperature Range: May be equal to or wider than the original specification
• Product Status: Active status preferred for long-term availability

The substitute parts listed below meet all critical matching parameters and provide equal or improved performance characteristics in secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

EEF-SX0J121E7 (Panasonic SP-Cap SX Series)

This part is the primary direct substitute for the SPA121M06R. It matches all critical electrical parameters and maintains identical ESR at 7 mOhm. The EEF-SX0J121E7 offers superior performance with doubled lifetime rating (2000 Hrs @ 105°C versus 1000 Hrs), extended lower operating temperature limit (-55°C versus -40°C), and increased ripple current capability (7 A @ 100 kHz versus 3.5 A). The component is actively manufactured and RoHS3 compliant. Physical height is reduced to 2.00 mm, providing improved board-level compatibility in space-constrained applications. This part is suitable for direct replacement in all applications where the SPA121M06R was specified.

EEF-CX0J121R (Panasonic SP-Cap CX Series)

This part is a secondary substitute offering equivalent capacitance, voltage, and tolerance specifications. The ESR is elevated to 15 mOhm compared to the original 7 mOhm specification, representing a 114% increase in series resistance. This elevation may impact performance in applications with stringent ripple current or thermal management requirements. The EEF-CX0J121R provides equivalent lifetime rating (2000 Hrs @ 105°C), extended operating temperature range (-55°C ~ 105°C), and acceptable ripple current (5.1 A @ 100 kHz). The component is actively manufactured, RoHS3 compliant, and offers the lowest physical height (1.90 mm). Selection of this part is appropriate for general purpose applications where ESR elevation does not compromise circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0J121E7 be used as a direct replacement for the SPA121M06R?

A: Yes. The EEF-SX0J121E7 matches all critical electrical specifications (120 µF, 6.3 V, ±20% tolerance) and maintains identical ESR (7 mOhm). The part is pin-compatible within the 2917 (7343 Metric) package footprint and offers improved performance characteristics including extended lifetime and wider operating temperature range.

Q: What is the primary difference between the EEF-SX0J121E7 and EEF-CX0J121R?

A: The primary difference is ESR (Equivalent Series Resistance). The EEF-SX0J121E7 maintains 7 mOhm ESR matching the original part, while the EEF-CX0J121R has 15 mOhm ESR. Both parts share identical capacitance, voltage rating, tolerance, and package specifications. The EEF-CX0J121R offers lower physical height (1.90 mm versus 2.00 mm).

Q: Are there physical compatibility concerns when substituting these parts?

A: All three parts use the 2917 (7343 Metric) package with identical footprint dimensions (0.287" L x 0.169" W / 7.30 mm x 4.30 mm). The substitute parts have reduced seated heights (2.00 mm and 1.90 mm respectively versus 2.80 mm for the original), which improves clearance in space-constrained designs. No PCB layout modifications are required.

Q: Which substitute part should be selected for high ripple current applications?

A: The EEF-SX0J121E7 is recommended for applications requiring high ripple current handling. It provides 7 A @ 100 kHz ripple current capability compared to 3.5 A for the original SPA121M06R and 5.1 A for the EEF-CX0J121R.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both the EEF-SX0J121E7 and EEF-CX0J121R are RoHS3 compliant and REACH unaffected, matching the compliance status of the original SPA121M06R.

Q: What is the impact of the ESR difference on circuit performance?

A: ESR affects voltage ripple, thermal dissipation, and transient response. The EEF-SX0J121E7 maintains the original 7 mOhm ESR, ensuring equivalent electrical behavior. The EEF-CX0J121R with 15 mOhm ESR will produce higher voltage ripple and increased heat dissipation under identical ripple current conditions. Selection depends on circuit tolerance to these effects.

Q: Are the substitute parts available in the same packaging format?

A: Both substitute parts are supplied in Tape & Reel (TR) packaging, which is standard for surface mount production. The original SPA121M06R packaging format was not specified in the available data.