SPCX181M04R Equivalent & Substitute Parts Reference

Part Overview

The SPCX181M04R is a 180 µF, 4 V aluminum polymer surface mount capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for applications utilizing this capacitor specification.

Substiute Parts

SPCX181M04R

Cornell Dubilier Electronics (CDE)In Stock: 1209SPCX181M04R Datasheet

Current PartRFQ

EEF-CX0G181R

Panasonic Electronic ComponentsIn Stock: 2363EEF-CX0G181R Datasheet

DirectRFQ

EEF-CX0G181XR

Panasonic Electronic ComponentsIn Stock: 4233EEF-CX0G181XR Datasheet

DirectRFQ

EEF-SX0G181ER

Panasonic Electronic ComponentsIn Stock: 877EEF-SX0G181ER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPCX181M04R are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or exceed the original specification:

Critical Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Voltage Rating: 4 V (minimum requirement)
• Package / Case: 2917 (7343 Metric) (physical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Tolerance: ±20% (electrical tolerance)

Allowable Variations:

• ESR: Substitute parts may have equal or lower ESR values
• Lifetime @ Temperature: Substitute parts may have equal or longer lifetime ratings
• Operating Temperature Range: Substitute parts may have equal or wider temperature ranges
• Ripple Current Capability: Substitute parts may have equal or higher ripple current ratings

The substitute parts are grouped into two categories: Direct Equivalents (EEF-CX0G181R, EEF-CX0G181XR) and Similar Alternatives (EEF-SX0G181ER). All substitute parts are manufactured by Panasonic Electronic Components and maintain active product status with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection:

The EEF-CX0G181R and EEF-CX0G181XR from Panasonic Electronic Components are direct equivalents to the SPCX181M04R. Both parts maintain identical capacitance, voltage rating, package dimensions, and tolerance specifications. These parts are manufactured by an established supplier with active product status and full ROHS3 compliance.

The EEF-CX0G181XR offers superior performance characteristics with reduced ESR (12 mOhm versus 15 mOhm) and increased ripple current capability (5.6 A versus 2.7 A at 100 kHz), while maintaining identical physical dimensions and electrical ratings. The extended lifetime rating (2000 Hrs @ 105°C versus 1000 Hrs) and wider operating temperature range (-55°C to 105°C versus -40°C to 105°C) provide additional design margin.

Similar Alternative Selection:

The EEF-SX0G181ER represents a similar alternative within the Panasonic SP-Cap SX series. This part maintains all critical electrical specifications but features a marginally increased seated height (2.00 mm versus 1.90 mm). The EEF-SX0G181ER delivers the lowest ESR (9 mOhm) and highest ripple current capability (6.3 A @ 100 kHz) among all substitute options. This part is suitable for applications where the additional 0.10 mm height does not create PCB layout constraints.

All substitute parts carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete SPCX181M04R.

Frequently Asked Questions (FAQ)

Q: Can the EEF-CX0G181R directly replace the SPCX181M04R without PCB modifications?

A: Yes. The EEF-CX0G181R maintains identical package dimensions (2917 / 7343 Metric), surface mount land size (0.287" L x 0.169" W), and seated height (0.075" maximum). No PCB layout changes are required for this substitution.

Q: What is the difference between EEF-CX0G181R and EEF-CX0G181XR?

A: Both parts are mechanically and electrically identical in terms of capacitance, voltage, package, and tolerance. The primary difference is ESR: EEF-CX0G181R has 15 mOhm ESR, while EEF-CX0G181XR has 12 mOhm ESR. The EEF-CX0G181XR also provides higher ripple current capability (5.6 A versus 5.1 A @ 100 kHz).

Q: Can the EEF-SX0G181ER be used as a direct replacement?

A: The EEF-SX0G181ER is electrically compatible but has a seated height of 2.00 mm compared to 1.90 mm for the original part. Verify that the additional 0.10 mm height does not conflict with PCB component placement or enclosure clearances before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The EEF-CX0G181R, EEF-CX0G181XR, and EEF-SX0G181ER are all ROHS3 compliant, matching the compliance status of the original SPCX181M04R.

Q: Why do the substitute parts have longer lifetime ratings?

A: The substitute parts are rated for 2000 Hrs @ 105°C compared to 1000 Hrs for the original part. This reflects improved polymer formulation and manufacturing processes in current Panasonic production. The extended lifetime provides additional design margin and reliability for long-term applications.

Q: What is the significance of the wider operating temperature range in substitute parts?

A: The substitute parts operate from -55°C to 105°C, compared to -40°C to 105°C for the original part. The extended lower temperature limit provides compatibility with applications requiring operation in cold environments or during storage in uncontrolled conditions.

Q: Are there inventory considerations when selecting a substitute?

A: The original SPCX181M04R has 1101 pieces in stock. The EEF-CX0G181XR has the highest inventory availability at 4209 pieces, followed by EEF-CX0G181R at 2300 pieces, and EEF-SX0G181ER at 781 pieces. Inventory levels should be considered for long-term supply planning.