SPA151M04R Equivalent & Substitute Parts Reference

Part Overview

The SPA151M04R is a 150 µF, 4 V aluminum polymer capacitor manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) surface mount package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Equivalent and substitute parts from active manufacturers provide functional alternatives for new designs and production requirements while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

SPA151M04R

Cornell Dubilier Electronics (CDE)In Stock: 759SPA151M04R Datasheet

Current PartRFQ

EEF-SX0G151E7

Panasonic Electronic ComponentsIn Stock: 3312EEF-SX0G151E7 Datasheet

DirectRFQ

ECASD40G157M016K00

Murata ElectronicsIn Stock: 3548ECASD40G157M016K00 Datasheet

SimilarRFQ

EEF-CX0G151R

Panasonic Electronic ComponentsIn Stock: 21692EEF-CX0G151R Datasheet

SimilarRFQ

EEF-SX0G151ER

Panasonic Electronic ComponentsIn Stock: 11954EEF-SX0G151ER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPA151M04R is determined by strict adherence to the following critical parameters:

Critical Parameters (Must Match Exactly):

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

Important Parameters (Must Be Equal or Superior):

• ESR: Substitute parts may have equal or lower ESR values
• Lifetime @ 105°C: Substitute parts may have equal or longer lifetime ratings
• Operating Temperature Range: Substitute parts must support the application's temperature requirements
• Ripple Current @ 100 kHz: Substitute parts may have equal or higher ripple current capability
• RoHS Compliance: All substitute parts must maintain ROHS3 compliance

All four substitute parts listed below meet these criteria and are electrically and mechanically interchangeable with the SPA151M04R within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs:

The three active substitute parts (EEF-SX0G151E7, EEF-CX0G151R, and EEF-SX0G151ER) are preferred over the obsolete SPA151M04R and ECASD40G157M016K00 due to confirmed long-term availability and manufacturer support. All three active alternatives are manufactured by Panasonic Electronic Components and maintain ROHS3 compliance.

EEF-SX0G151E7 (Panasonic SP-Cap SX Series):

• Identical ESR to the original part (7 mOhm)
• Extended lifetime rating (2000 Hrs @ 105°C vs. 1000 Hrs)
• Expanded operating temperature range (-55°C to +105°C)
• Highest ripple current capability among direct ESR matches (7.0 A @ 100 kHz)
• Reduced seated height (2.00 mm vs. 2.80 mm original)

EEF-CX0G151R (Panasonic SP-Cap CX Series):

• Highest inventory availability (21,633 Pcs)
• Extended lifetime rating (2000 Hrs @ 105°C)
• Expanded operating temperature range (-55°C to +105°C)
• Moderate ESR increase (15 mOhm vs. 7 mOhm original)
• Reduced seated height (1.90 mm)
• Suitable for applications where lower ESR is not critical

EEF-SX0G151ER (Panasonic SP-Cap SX Series):

• Minimal ESR increase (9 mOhm vs. 7 mOhm original)
• Extended lifetime rating (2000 Hrs @ 105°C)
• Expanded operating temperature range (-55°C to +105°C)
• High ripple current capability (6.3 A @ 100 kHz)
• Reduced seated height (2.00 mm)

For Legacy System Maintenance:

The ECASD40G157M016K00 (Murata ECAS Series) is electrically compatible but is classified as obsolete. This part should only be selected if existing inventory is available and long-term supply is not required. The increased ESR (16 mOhm) and reduced ripple current capability (2.1 A @ 100 kHz) represent performance trade-offs compared to the original SPA151M04R.

PCB Layout Consideration:

All substitute parts maintain the identical 2917 (7343 Metric) package footprint and surface mount land size (0.287" L x 0.169" W / 7.30 mm x 4.30 mm). However, the reduced seated heights of the Panasonic alternatives (1.90 mm to 2.00 mm vs. 2.80 mm original) may provide additional clearance in space-constrained applications. Verify that component height does not conflict with adjacent board-level features or enclosure constraints.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0G151E7, EEF-CX0G151R, and EEF-SX0G151ER be used interchangeably with SPA151M04R on the same PCB?

A: Yes. All substitute parts share identical capacitance (150 µF), voltage rating (4 V), tolerance (±20%), package (2917 / 7343 Metric), and surface mount land size. The PCB footprint and electrical interface are fully compatible. The reduced seated heights of the Panasonic parts may provide additional clearance but do not affect electrical performance or assembly compatibility.

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

A: ESR (Equivalent Series Resistance) affects the capacitor's ability to handle ripple current and dissipate heat. Lower ESR values result in lower heat generation and higher ripple current capability. The SPA151M04R has 7 mOhm ESR. EEF-SX0G151E7 and EEF-SX0G151ER maintain or closely approach this value (7 mOhm and 9 mOhm respectively), while EEF-CX0G151R has 15 mOhm. For applications with high ripple current demands, EEF-SX0G151E7 or EEF-SX0G151ER are preferred. For general-purpose applications with moderate ripple current, EEF-CX0G151R is acceptable.

Q: Why do the substitute parts have longer lifetime ratings (2000 Hrs @ 105°C vs. 1000 Hrs)?

A: The three active Panasonic alternatives (EEF-SX0G151E7, EEF-CX0G151R, EEF-SX0G151ER) feature improved polymer electrolyte formulations and manufacturing processes that extend operational life at elevated temperatures. This provides additional design margin and reliability for long-term applications. The extended lifetime does not change the electrical specifications but indicates superior long-term performance characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four substitute parts (EEF-SX0G151E7, ECASD40G157M016K00, EEF-CX0G151R, and EEF-SX0G151ER) are ROHS3 compliant, matching the original SPA151M04R. This ensures regulatory compliance for applications subject to RoHS directives.

Q: What is the difference between the Panasonic SP-Cap SX and SP-Cap CX series?

A: Both series are aluminum polymer capacitors in the 2917 package with identical electrical specifications (150 µF, 4 V, ±20%). The primary differences are ESR and ripple current capability. The SX series (EEF-SX0G151E7 and EEF-SX0G151ER) offers lower ESR values (7 mOhm and 9 mOhm) and higher ripple current ratings (7.0 A and 6.3 A @ 100 kHz). The CX series (EEF-CX0G151R) has higher ESR (15 mOhm) and moderate ripple current (5.1 A @ 100 kHz). Selection depends on the application's ripple current requirements.

Q: Why is ECASD40G157M016K00 listed as a substitute if it is obsolete?

A: ECASD40G157M016K00 is included because it meets all critical substitution parameters and is electrically compatible with SPA151M04R. However, its obsolete status limits its suitability for new designs or long-term production. It should only be selected if existing inventory is available and supply continuity is not a concern. For new designs, the three active Panasonic alternatives are strongly preferred.

Q: Can I use a substitute part with a higher voltage rating (e.g., 6.3 V instead of 4 V)?

A: No. The substitute parts listed are all rated at 4 V, matching the original SPA151M04R. Using a higher voltage-rated capacitor would change the physical dimensions, package size, and electrical characteristics, violating the substitution criteria. Only parts with identical or lower voltage ratings at the same capacitance are valid substitutes.

Q: What is the Moisture Sensitivity Level (MSL) for the substitute parts?

A: The SPA151M04R and ECASD40G157M016K00 are rated MSL 3 (168 Hours). The Panasonic parts (EEF-SX0G151E7, EEF-CX0G151R, and EEF-SX0G151ER) do not specify MSL in the provided data. Consult the manufacturers' datasheets for complete moisture sensitivity specifications if this parameter is critical for your assembly process.

Q: Are there any height clearance issues when substituting the original part?

A: The original SPA151M04R has a seated height of 2.80 mm. The Panasonic substitutes have reduced heights (2.00 mm for EEF-SX0G151E7 and EEF-SX0G151ER; 1.90 mm for EEF-CX0G151R), and the Murata part is 1.90 mm. These reductions provide additional clearance in space-constrained designs. Verify that the reduced height does not create unintended air gaps or affect solder joint quality during reflow assembly.