SPA121M06B Equivalent & Substitute Parts Reference

Part Overview

The SPA121M06B 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, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

SPA121M06B

Cornell Dubilier Electronics (CDE)In Stock: 888SPA121M06B Datasheet

Current PartRFQ

EEF-SX0J121E7

Panasonic Electronic ComponentsIn Stock: 1840EEF-SX0J121E7 Datasheet

DirectRFQ

EEF-CX0J121R

Panasonic Electronic ComponentsIn Stock: 27764EEF-CX0J121R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following 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)
• Physical Dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm) (exact match required)

The following parameters may vary within acceptable engineering limits:

• ESR (Equivalent Series Resistance): Variation permitted; lower ESR values indicate improved performance
• Lifetime @ Temperature: Variation permitted; higher values indicate extended operational life
• Operating Temperature Range: Variation permitted; wider ranges provide greater flexibility
• Ripple Current @ High Frequency: Variation permitted; higher values indicate greater current handling capability
• Height - Seated (Max): Variation permitted within PCB assembly constraints

Two active substitute parts meet these criteria, both manufactured by Panasonic Electronic Components.

Parameter Comparison

Engineering Selection Recommendations

EEF-SX0J121E7 is the primary substitute for SPA121M06B. This part maintains identical ESR (7 mOhm) to the original component while offering doubled operational lifetime (2000 Hrs @ 105°C versus 1000 Hrs @ 105°C). The extended operating temperature range (-55°C ~ 105°C) provides additional design margin. Ripple current capability is doubled (7 A @ 100 kHz versus 3.5 A @ 100 kHz). The reduced seated height (0.079" versus 0.110") ensures compatibility with existing PCB layouts. Product status is active with ROHS3 and REACH compliance confirmed.

EEF-CX0J121R is a secondary substitute option. This part exhibits higher ESR (15 mOhm versus 7 mOhm) but maintains the same 2000 Hrs @ 105°C lifetime rating and extended operating temperature range. Ripple current capability (5.1 A @ 100 kHz) exceeds the original specification. The lowest seated height (0.075") provides maximum PCB assembly clearance. Product status is active with ROHS3 and REACH compliance confirmed. Selection of this part is appropriate when ESR elevation does not impact circuit performance.

Both substitute parts are manufactured by Panasonic Electronic Components, an established supplier with active product lines and confirmed regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0J121E7 or EEF-CX0J121R be used as direct replacements for SPA121M06B on existing PCBs?

A: Both parts are mechanically and electrically compatible. The 2917 (7343 Metric) package, physical dimensions (0.287" L x 0.169" W), and surface mount land pattern are identical. The reduced seated heights (0.079" and 0.075" respectively, versus 0.110" original) ensure clearance compatibility. Electrical parameters (120 µF, 6.3 V, ±20% tolerance) are equivalent.

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

A: The primary difference is ESR. EEF-SX0J121E7 maintains 7 mOhm ESR matching the original part, while EEF-CX0J121R has 15 mOhm ESR. Both offer identical 2000 Hrs @ 105°C lifetime and extended temperature range. EEF-SX0J121E7 provides higher ripple current capability (7 A @ 100 kHz versus 5.1 A @ 100 kHz). Selection depends on circuit ripple current requirements and ESR sensitivity.

Q: Are both substitute parts available in production quantities?

A: EEF-SX0J121E7 inventory is 1788 Pcs. EEF-CX0J121R inventory is 27666 Pcs. Both are listed as active products with confirmed stock availability.

Q: Do the substitute parts meet RoHS and REACH compliance?

A: Both EEF-SX0J121E7 and EEF-CX0J121R are ROHS3 compliant and REACH unaffected. The original SPA121M06B is ROHS3 compliant.

Q: What is the impact of the lower seated height on PCB assembly?

A: The reduced seated heights (0.079" for EEF-SX0J121E7 and 0.075" for EEF-CX0J121R, compared to 0.110" for SPA121M06B) provide additional clearance above the component. This may improve PCB layout flexibility and reduce potential interference with adjacent components or conformal coatings.

Q: Can I use EEF-CX0J121R if my circuit requires lower ESR?

A: No. EEF-CX0J121R has 15 mOhm ESR, which is higher than both the original SPA121M06B (7 mOhm) and EEF-SX0J121E7 (7 mOhm). If circuit performance depends on ESR at or below 7 mOhm, EEF-SX0J121E7 is the appropriate selection.

Q: What is the operating temperature range difference?

A: SPA121M06B operates from -40°C to 105°C. Both substitute parts operate from -55°C to 105°C, providing 15°C additional low-temperature margin. This extended range does not restrict compatibility with designs using the original part.