EEF-SX0G151E7 Equivalent & Substitute Parts

Part Overview

The EEF-SX0G151E7 is a 150 µF, 4 V aluminum polymer capacitor manufactured by Panasonic Electronic Components in the SP-Cap SX series. This surface mount component is designed for general purpose applications requiring low equivalent series resistance and stable performance across extended temperature ranges. The part is currently active in production with 3,238 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when specific performance characteristics such as lower ESR or different ripple current ratings are required for application optimization.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	4 V
Tolerance	±20%
Package / Case	2917 (7343 Metric)
Type	Aluminum Polymer
Mounting Type	Surface Mount
ESR (Equivalent Series Resistance)	7 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Ripple Current @ 100 kHz	7 A

Substitute Part Grouping Explanation

Substitution eligibility for the EEF-SX0G151E7 is determined by the following critical parameters:

Primary Matching Criteria:

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

Secondary Performance Parameters (allowable variation):

ESR: 7 mOhm baseline; substitutes may vary within acceptable operating limits
Lifetime @ Temperature: 2000 Hrs @ 105°C baseline; lower values indicate reduced thermal endurance
Ripple Current @ 100 kHz: 7 A baseline; lower values indicate reduced high-frequency current handling capability
Operating Temperature Range: -55°C ~ 105°C baseline; narrower ranges may limit application scope
Physical Height: Minor variations acceptable within mounting constraints

All substitute parts listed maintain identical electrical specifications for capacitance, voltage, tolerance, and package dimensions, ensuring direct mechanical and electrical compatibility with the original design.

Parameter Comparison

Parameter	EEF-SX0G151E7	EEF-SX0G151ER	EEF-CX0G151R	ECASD40G157M016K00
Manufacturer	Panasonic	Panasonic	Panasonic	Murata Electronics
Capacitance	150 µF	150 µF	150 µF	150 µF
Voltage Rating	4 V	4 V	4 V	4 V
Tolerance	±20%	±20%	±20%	±20%
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Type	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer	Aluminum Polymer
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
ESR (mOhm)	7	9	15	16
Lifetime @ 105°C	2000 Hrs	2000 Hrs	2000 Hrs	1000 Hrs
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C
Ripple Current @ 100 kHz	7 A	6.3 A	5.1 A	2.1 A
Height - Seated (Max)	0.079" (2.00 mm)	0.079" (2.00 mm)	0.075" (1.90 mm)	0.075" (1.90 mm)
Product Status	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Inventory (Pcs)	3,238	11,908	21,633	3,498

Engineering Selection Recommendations

EEF-SX0G151ER (Panasonic SP-Cap SX Series)

This substitute maintains identical electrical and mechanical specifications to the primary part with the exception of ESR (9 mOhm vs. 7 mOhm) and ripple current capability (6.3 A vs. 7 A). Both parameters remain within acceptable operating margins for general purpose applications. The part is active in production with substantial inventory availability (11,908 units). RoHS3 and REACH compliance are maintained. This substitute is suitable for direct replacement in applications where the slightly elevated ESR and reduced ripple current do not exceed design tolerances.

EEF-CX0G151R (Panasonic SP-Cap CX Series)

This substitute is mechanically compatible with identical package dimensions and electrical ratings. ESR is elevated to 15 mOhm and ripple current is reduced to 5.1 A. Physical height is reduced to 0.075" (1.90 mm), providing a lower profile option. The part is active in production with the highest inventory availability (21,633 units). RoHS3 and REACH compliance are maintained. This substitute is suitable for applications where reduced component height is beneficial and where the elevated ESR and reduced ripple current specifications are acceptable.

ECASD40G157M016K00 (Murata Electronics ECAS Series)

This substitute maintains identical package dimensions and electrical ratings but exhibits significant performance differences. ESR is 16 mOhm, ripple current is reduced to 2.1 A, and thermal lifetime is reduced to 1000 Hrs @ 105°C. Operating temperature range is narrowed to -40°C ~ 105°C. The part is marked as obsolete, indicating discontinued production status. RoHS3 and REACH compliance are maintained. This substitute is not recommended for new designs due to obsolete status and reduced thermal endurance. Use only when existing inventory must be consumed or when application requirements explicitly permit the reduced performance specifications.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0G151ER be used as a direct replacement for EEF-SX0G151E7?

A: Yes. Both parts are Panasonic SP-Cap SX series components with identical capacitance (150 µF), voltage rating (4 V), tolerance (±20%), package (2917), and operating temperature range (-55°C ~ 105°C). ESR increases from 7 mOhm to 9 mOhm and ripple current decreases from 7 A to 6.3 A @ 100 kHz. These variations are within acceptable operating margins for general purpose applications. Verify that your circuit design tolerates the slightly elevated ESR and reduced ripple current capability.

Q: What are the key differences between the Panasonic and Murata substitutes?

A: All three substitutes maintain identical capacitance, voltage, tolerance, and package specifications. The primary differences are ESR (ranging from 7 to 16 mOhm), ripple current capability (ranging from 2.1 to 7 A @ 100 kHz), thermal lifetime (1000 or 2000 Hrs @ 105°C), and product status. The Murata part (ECASD40G157M016K00) is obsolete and exhibits the lowest ripple current rating and thermal endurance.

Q: Does the reduced height of EEF-CX0G151R affect compatibility?

A: The EEF-CX0G151R has a maximum seated height of 0.075" (1.90 mm) compared to 0.079" (2.00 mm) for the primary part. This reduction is beneficial for space-constrained designs and does not create compatibility issues. Verify that your PCB layout and component placement accommodate the lower profile. All other mechanical dimensions (length, width, land size) remain identical.

Q: Why is ECASD40G157M016K00 marked as obsolete?

A: The Murata ECAS series part is no longer in active production. Obsolete status indicates that the manufacturer has discontinued this product line. While existing inventory may be available, future procurement cannot be guaranteed. This part should not be selected for new designs. Use only when consuming existing stock or when application requirements explicitly permit the reduced performance specifications (lower ripple current and thermal lifetime).

Q: What is the significance of ESR differences among these substitutes?

A: Equivalent Series Resistance (ESR) affects impedance characteristics and heat dissipation. The primary part EEF-SX0G151E7 has the lowest ESR at 7 mOhm, providing optimal performance for high-frequency ripple current applications. Substitutes with higher ESR (9, 15, or 16 mOhm) generate more heat under identical ripple current conditions. Verify that your circuit design and thermal management accommodate the ESR of the selected substitute.

Q: Are all substitutes RoHS3 and REACH compliant?

A: Yes. All four parts listed (EEF-SX0G151E7, EEF-SX0G151ER, EEF-CX0G151R, and ECASD40G157M016K00) are RoHS3 compliant and REACH unaffected. Regulatory compliance is maintained across all substitution options.

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