SPCX121M06R Equivalent & Substitute Parts Reference

Part Overview

The SPCX121M06R 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 performance within the specified operating parameters while meeting current manufacturing and compliance standards.

Substiute Parts

SPCX121M06R

Cornell Dubilier Electronics (CDE)In Stock: 854SPCX121M06R Datasheet

Current PartRFQ

EEF-CX0J121R

Panasonic Electronic ComponentsIn Stock: 27764EEF-CX0J121R Datasheet

DirectRFQ

EEF-SX0J121E7

Panasonic Electronic ComponentsIn Stock: 1840EEF-SX0J121E7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPCX121M06R is determined by strict equivalence across critical electrical and mechanical parameters. All substitute parts must satisfy the following conditions:

Critical Parameters (Non-Negotiable):

• Capacitance: 120 µF
• Voltage Rating: 6.3 V
• Tolerance: ±20%
• Package: 2917 (7343 Metric)
• Mounting: Surface Mount
• Type: Aluminum Polymer

High-Priority Parameters (Must Equal or Exceed):

• ESR: 15 mOhm or lower
• Lifetime @ 105°C: 1000 Hrs minimum
• Operating Temperature: Must encompass -40°C to 105°C range
• RoHS3 Compliance: Required

The identified substitute parts are classified into two categories:

Direct Equivalent (EEF-CX0J121R): Matches all critical parameters with identical ESR (15 mOhm) and enhanced lifetime (2000 Hrs @ 105°C). Active product status ensures supply continuity.

Enhanced Performance Alternative (EEF-SX0J121E7): Matches all critical parameters with superior ESR (7 mOhm) and enhanced lifetime (2000 Hrs @ 105°C). Represents performance upgrade option with active product status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-for-Pin Compatibility):

Select EEF-CX0J121R when the design requires exact electrical and mechanical equivalence to the SPCX121M06R. This Panasonic part maintains identical ESR (15 mOhm) and package dimensions (0.075" seated height), ensuring compatibility with existing PCB layouts and thermal management designs. The doubled lifetime rating (2000 Hrs @ 105°C versus 1000 Hrs) provides enhanced reliability without design modification. Active product status guarantees supply availability and manufacturing consistency. ROHS3 compliance and REACH unaffected status align with current regulatory requirements.

For Performance Enhancement:

Select EEF-SX0J121E7 when circuit design permits a 0.004" (0.10 mm) increase in seated height and when lower ESR (7 mOhm versus 15 mOhm) provides measurable system benefits. This configuration reduces heat dissipation and supports higher ripple current handling (7.0 A @ 100 kHz versus 2.7 A). Extended operating temperature range (-55°C to 105°C) accommodates broader environmental specifications. Active product status and full compliance certifications support long-term production continuity.

Compliance Verification:

Both substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original component's regulatory standing. ECCN and HTSUS classifications remain consistent across all three parts, simplifying export and procurement documentation.

Frequently Asked Questions (FAQ)

Q: Can EEF-CX0J121R replace SPCX121M06R in existing designs without PCB modification?

A: Yes. EEF-CX0J121R maintains identical package dimensions (2917/7343 Metric), land size (0.287" L × 0.169" W), and seated height (0.075" maximum). Surface mount land patterns and thermal characteristics remain unchanged, enabling direct substitution without PCB redesign.

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

A: Both parts share identical capacitance (120 µF), voltage (6.3 V), tolerance (±20%), and package type. Key differences are ESR (15 mOhm versus 7 mOhm), ripple current rating (5.1 A versus 7.0 A @ 100 kHz), and seated height (0.075" versus 0.079"). EEF-SX0J121E7 offers superior performance but requires height clearance verification on the PCB.

Q: Why is the SPCX121M06R obsolete, and how does this affect component selection?

A: Obsolete status indicates Cornell Dubilier Electronics has discontinued production. Panasonic equivalents (EEF-CX0J121R and EEF-SX0J121E7) are active products with confirmed supply chains, ensuring long-term availability for new designs and production runs.

Q: Are both substitute parts suitable for high-ripple-current applications?

A: EEF-CX0J121R supports 5.1 A @ 100 kHz, exceeding the original 2.7 A rating. EEF-SX0J121E7 supports 7.0 A @ 100 kHz, providing maximum ripple current capacity. Selection depends on circuit requirements and thermal management capability.

Q: Do the substitute parts meet the same compliance standards as SPCX121M06R?

A: Yes. Both EEF-CX0J121R and EEF-SX0J121E7 are ROHS3 compliant and REACH unaffected, matching the original component's regulatory status. ECCN (EAR99) and HTSUS (8532.22.0020) classifications are identical.

Q: What is the impact of the extended operating temperature range (-55°C to 105°C) in the substitute parts?

A: The substitute parts support operation at -55°C, compared to the original -40°C minimum. This extended range provides design flexibility for applications requiring broader temperature specifications. The upper limit (105°C) remains unchanged, maintaining thermal performance equivalence.

Q: Can EEF-SX0J121E7 be used in applications designed for SPCX121M06R if PCB height clearance is available?

A: Yes, provided the 0.004" (0.10 mm) increase in seated height (0.079" versus 0.075") does not conflict with component placement or assembly constraints. All electrical parameters remain compatible, and the lower ESR provides performance benefits.