SPA151M04B Equivalent & Substitute Parts

Part Overview

The SPA151M04B 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, 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.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	4 V
Type	Aluminum Polymer
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Tolerance	±20%
Operating Temperature Range	-40°C ~ 105°C
ESR (Equivalent Series Resistance)	7 mOhm
Lifetime @ Temperature	1000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SPA151M04B is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 150 µF
Voltage Rating: 4 V
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Tolerance: ±20%
Type: Aluminum Polymer

Compatible Variation Parameters (Allowed to Differ):

ESR (Equivalent Series Resistance): Substitute parts may have ESR values different from 7 mOhm, provided the substitute meets or exceeds the performance requirements of the application
Lifetime @ Temperature: Substitute parts with extended lifetime ratings (2000 Hrs @ 105°C) are acceptable and represent improved reliability
Operating Temperature Range: Substitute parts with extended lower temperature limits (-55°C vs. -40°C) are acceptable
Ripple Current @ High Frequency: Substitute parts with equal or higher ripple current ratings are acceptable
Height - Seated (Max): Substitute parts with reduced height are acceptable provided they fit within the PCB layout constraints
Product Status: Active substitute parts are preferred over obsolete alternatives

All substitute parts listed maintain ROHS3 compliance and are available from active manufacturers or current inventory sources.

Parameter Comparison

Parameter	SPA151M04B (CDE)	EEF-SX0G151E7 (Panasonic)	ECASD40G157M016K00 (Murata)	EEF-CX0G151R (Panasonic)	EEF-SX0G151ER (Panasonic)
Manufacturer	Cornell Dubilier Electronics	Panasonic Electronic Components	Murata Electronics	Panasonic Electronic Components	Panasonic Electronic Components
Capacitance	150 µF	150 µF	150 µF	150 µF	150 µF
Voltage Rating	4 V	4 V	4 V	4 V	4 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
ESR (mOhm)	7	7	16	15	9
Lifetime @ 105°C	1000 Hrs	2000 Hrs	1000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature Range	-40°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 100 kHz	3.5 A	7 A	2.1 A	5.1 A	6.3 A
Height - Seated (Max)	0.110" (2.80 mm)	0.079" (2.00 mm)	0.075" (1.90 mm)	0.075" (1.90 mm)	0.079" (2.00 mm)
Product Status	Obsolete	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute Recommendations (Active Status):

The following parts are recommended as primary substitutes due to active product status and improved performance characteristics:

EEF-SX0G151E7 (Panasonic) – Identical ESR (7 mOhm), doubled lifetime rating (2000 Hrs @ 105°C), extended lower operating temperature limit (-55°C), and significantly higher ripple current capability (7 A @ 100 kHz). Reduced height (2.00 mm) accommodates space-constrained layouts. ROHS3 compliant with REACH unaffected status.
EEF-SX0G151ER (Panasonic) – Slightly elevated ESR (9 mOhm), doubled lifetime rating (2000 Hrs @ 105°C), extended lower operating temperature limit (-55°C), and higher ripple current capability (6.3 A @ 100 kHz). Reduced height (2.00 mm). ROHS3 compliant with REACH unaffected status.
EEF-CX0G151R (Panasonic) – Elevated ESR (15 mOhm), doubled lifetime rating (2000 Hrs @ 105°C), extended lower operating temperature limit (-55°C), and higher ripple current capability (5.1 A @ 100 kHz). Reduced height (1.90 mm). ROHS3 compliant with REACH unaffected status.

Secondary Substitute (Obsolete Status):

ECASD40G157M016K00 (Murata) maintains equivalent electrical specifications but carries obsolete product status. This part is suitable only when active alternatives are unavailable and existing inventory is confirmed.

Selection Criteria:

For applications requiring maximum ripple current handling, select EEF-SX0G151E7
For applications with space constraints, select EEF-CX0G151R or EEF-SX0G151E7 (both 1.90–2.00 mm height)
For applications requiring lowest ESR, select EEF-SX0G151E7 (7 mOhm)
For all new designs, prioritize active status parts from Panasonic (EEF-SX or EEF-CX series)

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0G151E7 be used as a direct replacement for SPA151M04B?

A: Yes. Both parts share identical capacitance (150 µF), voltage rating (4 V), tolerance (±20%), package (2917 / 7343 Metric), and mounting type (Surface Mount). The EEF-SX0G151E7 offers improved performance with doubled lifetime rating and higher ripple current capability. The reduced height (2.00 mm vs. 2.80 mm) must be verified against PCB layout constraints.

Q: What is the significance of ESR differences among substitute parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and thermal performance. The SPA151M04B specifies 7 mOhm ESR. Substitute parts with higher ESR values (9–16 mOhm) generate more heat under ripple current conditions. Selection depends on application ripple current requirements. EEF-SX0G151E7 maintains the original 7 mOhm specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original SPA151M04B specification.

Q: Can ECASD40G157M016K00 be used despite its obsolete status?

A: ECASD40G157M016K00 meets all critical electrical and mechanical parameters but carries obsolete product status. Use is limited to applications where active alternatives are unavailable and existing inventory is confirmed. For new designs or ongoing production, active status parts are required.

Q: What is the impact of extended operating temperature range (-55°C vs. -40°C)?

A: Panasonic substitute parts (EEF-SX0G151E7, EEF-CX0G151R, EEF-SX0G151ER) extend the lower operating temperature limit from -40°C to -55°C. This provides additional design margin for applications operating in cold environments. The upper temperature limit remains 105°C across all parts.

Q: How does the reduced height of substitute parts affect PCB design?

A: Substitute parts offer reduced seated heights (1.90–2.00 mm) compared to the original SPA151M04B (2.80 mm). This reduction accommodates space-constrained layouts and may improve thermal performance through better airflow. Verify that reduced height does not conflict with component placement or clearance requirements.

Q: What is the difference between EEF-SX and EEF-CX series from Panasonic?

A: Both series are aluminum polymer capacitors in the 2917 package with 150 µF capacitance and 4 V rating. The EEF-SX series offers lower ESR (7–9 mOhm) and higher ripple current (6.3–7 A @ 100 kHz). The EEF-CX series offers moderate ESR (15 mOhm) and moderate ripple current (5.1 A @ 100 kHz). Selection depends on ripple current and thermal requirements.

Q: Is inventory availability a factor in part selection?

A: Yes. Current inventory levels are: EEF-CX0G151R (21,633 pcs), EEF-SX0G151ER (11,908 pcs), EEF-SX0G151E7 (3,238 pcs), and ECASD40G157M016K00 (3,498 pcs). Verify availability with suppliers before finalizing design decisions.

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