SPA221M04B Equivalent & Substitute Parts

Part Overview

The SPA221M04B is a 220 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	220 µF
Voltage Rating	4 V
Tolerance	±20%
Type	Aluminum - Polymer
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 105°C
ESR (Equivalent Series Resistance)	5 mOhm
Ripple Current @ 100 kHz	4 A
Lifetime @ Temperature	1000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the SPA221M04B are qualified based on the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match Exactly):

Capacitance: 220 µF
Voltage Rating: 4 V
Tolerance: ±20%
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Type: Aluminum - Polymer

Variable Parameters (Allowed to Differ Within Functional Limits):

ESR (Equivalent Series Resistance): Substitute parts may have higher ESR values; lower ESR values provide improved performance characteristics
Ripple Current @ 100 kHz: Substitute parts may have equal or higher ripple current ratings
Operating Temperature Range: Substitute parts may have extended temperature ranges
Lifetime @ Temperature: Substitute parts may have extended operational lifetimes
Physical Height: Substitute parts may have different seated heights within the same package footprint

All substitute parts listed maintain ROHS3 compliance and MSL 3 rating, ensuring compatibility with standard manufacturing and handling processes.

Parameter Comparison

Part Number	Manufacturer	Status	ESR (mOhm)	Ripple Current @ 100 kHz (A)	Lifetime @ Temp.	Operating Temp. Range	Height - Seated (Max)
SPA221M04B	Cornell Dubilier Electronics	Obsolete	5	4.0	1000 Hrs @ 105°C	-40°C ~ 105°C	0.165" (4.20mm)
A700X227M004ATE010	KEMET	Active	10	4.7	2000 Hrs @ 125°C	-55°C ~ 125°C	0.169" (4.30mm)
ECASD60G227M010K00	Murata Electronics	Obsolete	10	3.0	1000 Hrs @ 105°C	-40°C ~ 105°C	0.110" (2.80mm)
EEF-CX0G221R	Panasonic Electronic Components	Active	15	5.1	2000 Hrs @ 105°C	-55°C ~ 105°C	0.075" (1.90mm)
EEF-CX0G221XR	Panasonic Electronic Components	Active	12	5.6	2000 Hrs @ 105°C	-55°C ~ 105°C	0.075" (1.90mm)
EEF-SX0G221ER	Panasonic Electronic Components	Active	9	6.3	2000 Hrs @ 105°C	-55°C ~ 105°C	0.079" (2.00mm)

Engineering Selection Recommendations

Primary Recommendation: EEF-SX0G221ER

The EEF-SX0G221ER from Panasonic Electronic Components is the preferred substitute for the SPA221M04B. This part is currently in active production status, ensuring long-term availability and supply chain stability. The EEF-SX0G221ER maintains all critical electrical parameters (220 µF, 4 V, ±20% tolerance, 2917 package) while providing superior performance characteristics: ESR of 9 mOhm (compared to 5 mOhm in the original), ripple current rating of 6.3 A @ 100 kHz, and extended lifetime of 2000 Hrs @ 105°C. The part is ROHS3 compliant and carries REACH Unaffected status. Inventory availability is substantial at 46,689 pieces.

Secondary Recommendation: EEF-CX0G221XR

The EEF-CX0G221XR from Panasonic Electronic Components serves as an alternative substitute with active product status. This part offers ESR of 12 mOhm, ripple current of 5.6 A @ 100 kHz, and 2000 Hrs @ 105°C lifetime. It maintains full compliance with ROHS3 and REACH requirements. Inventory availability is 9,865 pieces.

Tertiary Recommendation: A700X227M004ATE010

The A700X227M004ATE010 from KEMET is an active substitute with extended operating temperature range (-55°C ~ 125°C) and extended lifetime (2000 Hrs @ 125°C). This part is suitable for applications requiring enhanced thermal performance. Inventory availability is 12,800 pieces.

Not Recommended for New Designs:

The ECASD60G227M010K00 from Murata Electronics is classified as obsolete and should not be selected for new designs despite meeting the core electrical specifications. The SPA221M04B itself is also obsolete and should be replaced with an active substitute.

Frequently Asked Questions (FAQ)

Q: Can the EEF-SX0G221ER directly replace the SPA221M04B without circuit modifications?

A: Yes. The EEF-SX0G221ER maintains identical capacitance (220 µF), voltage rating (4 V), tolerance (±20%), and package footprint (2917 / 7343 Metric). The part is pin-compatible and requires no circuit design changes. The lower ESR value (9 mOhm versus 5 mOhm) provides improved performance in ripple current handling and thermal characteristics.

Q: What is the significance of the ESR difference between the original part and substitute parts?

A: ESR (Equivalent Series Resistance) affects the capacitor's ability to handle ripple current and dissipate heat. The original SPA221M04B has 5 mOhm ESR. Substitute parts have higher ESR values (9–15 mOhm). Higher ESR results in increased heat generation under ripple current conditions. For most general-purpose applications, the substitute parts' ESR values remain within acceptable operating limits. Applications with extremely demanding ripple current requirements should verify that the substitute part's ripple current rating (provided in the parameter table) meets or exceeds the circuit requirement.

Q: Are there physical height constraints when substituting the SPA221M04B?

A: Yes. The original SPA221M04B has a seated height of 0.165" (4.20mm). Substitute parts vary: A700X227M004ATE010 is 0.169" (4.30mm), ECASD60G227M010K00 is 0.110" (2.80mm), and Panasonic parts (EEF-CX0G221R, EEF-CX0G221XR, EEF-SX0G221ER) are 0.075–0.079" (1.90–2.00mm). Verify that the selected substitute part's height does not exceed available board clearance. Panasonic parts offer the lowest profile and are suitable for space-constrained designs.

Q: Do all substitute parts maintain the same RoHS and MSL compliance?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 3 (168 Hours) rating, matching the original SPA221M04B. This ensures compatibility with standard surface mount assembly processes and handling requirements.

Q: Why is the ECASD60G227M010K00 not recommended despite meeting electrical specifications?

A: The ECASD60G227M010K00 is classified as obsolete, which creates long-term supply chain risk. Additionally, its ripple current rating (3.0 A @ 100 kHz) is lower than the original part (4.0 A), potentially limiting performance in ripple-intensive applications. Active substitute parts provide superior availability and performance characteristics.

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

A: Both series are Panasonic aluminum-polymer capacitors in the 2917 package with identical electrical specifications (220 µF, 4 V, ±20%). The SP-Cap SX series (EEF-SX0G221ER) offers lower ESR (9 mOhm) and higher ripple current (6.3 A @ 100 kHz) compared to the SP-Cap CX series (EEF-CX0G221R: 15 mOhm, 5.1 A; EEF-CX0G221XR: 12 mOhm, 5.6 A). The SP-Cap SX series is the preferred choice for applications prioritizing low impedance and high ripple current handling.

Q: Can substitute parts be mixed in the same circuit board design?

A: Yes, provided all parts meet the circuit's electrical requirements. However, for manufacturing consistency and supply chain simplification, using a single substitute part number across all positions is recommended. If multiple substitute parts are used, verify that each part's ripple current rating and ESR characteristics are compatible with the specific circuit location and thermal environment.

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