SPCX151M04R Equivalent & Substitute Parts

Part Overview

The SPCX151M04R is a 150 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, making identification of functionally equivalent alternatives essential for design continuity and procurement planning. Replacement components must maintain compatibility with the specified electrical parameters, physical dimensions, and mounting characteristics.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	4 V
Tolerance	±20%
Type	Aluminum Polymer
Package	2917 (7343 Metric)
Mounting Type	Surface Mount
ESR	15 mOhm (nominal)
Operating Temperature Range	-40°C to 105°C
Lifetime @ 105°C	1000 Hrs

Substitute Part Grouping Explanation

Substitution candidates for the SPCX151M04R are evaluated based on the following critical parameters:

Mandatory Matching Criteria:

Capacitance: 150 µF (±20% tolerance)
Voltage Rating: 4 V minimum
Package: 2917 (7343 Metric)
Mounting: Surface Mount
Physical Dimensions: 7.30 mm L × 4.30 mm W (matching footprint)

Performance Parameters (may exceed baseline):

ESR: 15 mOhm or lower
Lifetime @ 105°C: 1000 Hrs or greater
Ripple Current @ 100 kHz: 2.7 A or greater

Compliance Requirements:

RoHS3 Compliant
MSL 3 or better

The substitute parts listed below satisfy all mandatory criteria and represent active or equivalent-specification alternatives to the obsolete SPCX151M04R.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR	Lifetime @ 105°C	Ripple Current @ 100 kHz	Status	Operating Temp Range
SPCX151M04R	Cornell Dubilier	150 µF	4 V	15 mOhm	1000 Hrs	2.7 A	Obsolete	-40°C to 105°C
EEF-CX0G151R	Panasonic	150 µF	4 V	15 mOhm	2000 Hrs	5.1 A	Active	-55°C to 105°C
EEF-SX0G151E7	Panasonic	150 µF	4 V	7 mOhm	2000 Hrs	7 A	Active	-55°C to 105°C
EEF-SX0G151ER	Panasonic	150 µF	4 V	9 mOhm	2000 Hrs	6.3 A	Active	-55°C to 105°C
ECASD40G157M016K00	Murata Electronics	150 µF	4 V	16 mOhm	1000 Hrs	2.1 A	Obsolete	-40°C to 105°C
EEF-CX0J151R	Panasonic	150 µF	6.3 V	15 mOhm	2000 Hrs	5.1 A	Active	-55°C to 105°C

Engineering Selection Recommendations

Preferred Substitutes (Direct Replacement):

The EEF-CX0G151R from Panasonic represents the primary equivalent alternative to the SPCX151M04R. This part maintains identical electrical specifications (150 µF, 4 V, 15 mOhm ESR, 2917 package) while offering improved performance characteristics: 2000-hour lifetime at 105°C, extended operating temperature range (-55°C to 105°C), and 5.1 A ripple current capacity. The part maintains RoHS3 compliance and is in active production with substantial inventory availability.

Enhanced Performance Alternatives:

The EEF-SX0G151E7 and EEF-SX0G151ER from Panasonic's SP-Cap SX series provide superior performance with reduced ESR (7 mOhm and 9 mOhm respectively) and increased ripple current capacity (7 A and 6.3 A). These parts are fully compatible with the SPCX151M04R footprint and maintain the same 150 µF, 4 V specification. Both are actively produced with RoHS3 compliance.

Cautionary Alternatives:

The ECASD40G157M016K00 from Murata meets the core electrical requirements but exhibits slightly higher ESR (16 mOhm) and lower ripple current capability (2.1 A) compared to the original specification. This part is obsolete and should only be considered if inventory constraints require it.

Note on Voltage-Upgraded Substitute:

The EEF-CX0J151R (6.3 V rating) is electrically compatible and provides superior voltage headroom. This part should be considered only when circuit design permits increased voltage rating without impact to other components.

Frequently Asked Questions (FAQ)

Q: Can I use EEF-CX0J151R (6.3 V) in place of SPCX151M04R (4 V)?

A: Yes. The 6.3 V part is fully backward compatible when the circuit voltage does not exceed 4 V. The higher voltage rating provides additional safety margin and does not negatively affect performance in 4 V applications. Physical dimensions and capacitance remain identical.

Q: What are the footprint compatibility considerations?

A: All listed substitutes use the identical 2917 (7343 Metric) package with surface mount land dimensions of 7.30 mm × 4.30 mm. PCB footprint modifications are not required. Minor height variations (1.90 mm to 2.00 mm) do not affect assembly clearances for standard surface mount applications.

Q: How does ESR affect component selection?

A: ESR directly impacts ripple current handling and thermal performance. Lower ESR values (7 mOhm to 9 mOhm in the Panasonic SX series) reduce power dissipation and are preferred for high-frequency or high-current applications. The baseline 15 mOhm specification remains adequate for general-purpose applications. Higher ESR (16 mOhm) is acceptable only when ripple current demands are minimal.

Q: Are all substitutes RoHS3 compliant?

A: All active-production substitutes (Panasonic EEF-CX0G151R, EEF-SX0G151E7, EEF-SX0G151ER, and EEF-CX0J151R) maintain RoHS3 compliance. The obsolete Murata ECASD40G157M016K00 also carries RoHS3 certification but should not be selected for new designs.

Q: What is the significance of the 2000-hour versus 1000-hour lifetime specification?

A: Lifetime rating at 105°C temperature indicates the time at which capacitance has degraded to 80% of initial value under maximum operating temperature. The 2000-hour rating of active Panasonic substitutes provides extended component reliability compared to the original 1000-hour specification, representing improved long-term performance for equivalent electrical characteristics.

Q: Is packaging (Tape & Reel) compatible with the original SMD format?

A: Yes. Tape & Reel packaging is the standard supply format for surface mount components and is fully compatible with automated assembly processes. This packaging format does not affect component performance or footprint compatibility.

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