SLP221M400C5P3 Equivalent & Substitute Parts

Part Overview

The SLP221M400C5P3 is a 220 µF, 400 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is rated for general-purpose applications with a 3000-hour lifetime at 105°C and an operating temperature range of -25°C to 105°C. The part maintains Active product status and is ROHS3 compliant.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand extended operational lifetime, higher voltage ratings, or improved ripple current handling, or when alternative manufacturers' components offer superior performance characteristics within the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Voltage - Rated	400	V
Tolerance	±20%	-
Lifetime @ Temperature	3000	Hrs @ 105°C
Operating Temperature Range	-25 to 105	°C
Polarization	Polar	-
Package / Case	Radial, Can - Snap-In	-
Lead Spacing	0.394 (10.00)	" (mm)
Size / Dimension	0.984 Dia (25.00)	" Dia (mm)
Mounting Type	Through Hole	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the SLP221M400C5P3 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 220 µF
Voltage Rating: 400 V minimum (higher voltage ratings are acceptable as upgrades)
Tolerance: ±20%
Polarization: Polar
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)
Mounting Type: Through Hole
Operating Temperature Range: -25°C to 105°C minimum

Performance Parameters (Determine Substitution Category):

Lifetime @ 105°C: 3000 hours minimum
Ripple Current Capability: Must support application requirements
ESR (Equivalent Series Resistance): Lower values indicate superior performance

Substitute parts are categorized as follows:

Direct Equivalents: Parts with identical electrical ratings (220 µF, 400 V, ±20%, 3000 Hrs @ 105°C) and compatible mechanical dimensions. These parts are interchangeable without design modification.

Performance Upgrades: Parts with extended lifetime (5000 Hrs @ 105°C) or higher voltage ratings (420 V, 450 V) while maintaining 220 µF capacitance and compatible packaging. These provide enhanced reliability or design margin.

Parametric Equivalents: Parts with identical electrical specifications but different physical dimensions or ripple current ratings. These require mechanical verification before substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Height - Seated Max (" / mm)	Product Status	RoHS Status
SLP221M400C5P3	Cornell Dubilier Electronics	220	400	3000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant
400MXK220MEFCSN25X30	Rubycon	220	400	3000	-25 to 105	1.260 / 32.00	Active	ROHS3 Compliant
400VXH220MEFCSN25X30	Rubycon	220	400	5000	-25 to 105	1.260 / 32.00	Active	ROHS3 Compliant
B43508B9227M000	EPCOS - TDK Electronics	220	400	3000	-40 to 105	1.457 / 37.00	Not For New Designs	ROHS3 Compliant
EKMS401VSN221MQ30S	Chemi-Con	220	400	3000	-25 to 105	1.280 / 32.50	Active	ROHS3 Compliant
LGX2G221MELA35	Nichicon	220	400	5000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant
450VXH220MEFCSN25X35	Rubycon	220	450	5000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant
ELHS451VSN221MQ35S	Chemi-Con	220	450	5000	-40 to 105	1.476 / 37.50	Active	RoHS Compliant
LQSW6221MELA35	Nichicon	220	420	3000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant
400HXG220MEFCSN25X35	Rubycon	220	400	3000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant
400MXG220MEFCSN25X35	Rubycon	220	400	3000	-25 to 105	1.457 / 37.00	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (No Design Modification Required):

The following parts are direct equivalents to the SLP221M400C5P3 and maintain identical electrical specifications with Active product status:

400MXK220MEFCSN25X30 (Rubycon): Equivalent 220 µF, 400 V, 3000 Hrs @ 105°C rating. Reduced height (1.260" vs. 1.457") permits installation in space-constrained applications. ROHS3 compliant.
EKMS401VSN221MQ30S (Chemi-Con): Equivalent 220 µF, 400 V, 3000 Hrs @ 105°C rating. Slightly increased diameter (1.000" vs. 0.984") with reduced height (1.280" vs. 1.457"). ROHS3 compliant.
400HXG220MEFCSN25X35 (Rubycon): Equivalent 220 µF, 400 V, 3000 Hrs @ 105°C rating. Identical physical dimensions and electrical specifications. ROHS3 compliant.
400MXG220MEFCSN25X35 (Rubycon): Equivalent 220 µF, 400 V, 3000 Hrs @ 105°C rating. Identical physical dimensions and electrical specifications. ROHS3 compliant.

Performance Upgrade Substitution (Enhanced Reliability):

The following parts provide extended operational lifetime or higher voltage ratings while maintaining 220 µF capacitance and compatible packaging:

400VXH220MEFCSN25X30 (Rubycon): Extended lifetime of 5000 Hrs @ 105°C (versus 3000 Hrs). Maintains 400 V rating. Reduced height (1.260" vs. 1.457"). ROHS3 compliant. Suitable for applications requiring enhanced reliability.
LGX2G221MELA35 (Nichicon): Extended lifetime of 5000 Hrs @ 105°C (versus 3000 Hrs). Maintains 400 V rating and identical physical dimensions. ROHS3 compliant. Suitable for applications requiring enhanced reliability.
450VXH220MEFCSN25X35 (Rubycon): Elevated voltage rating of 450 V (versus 400 V) with extended lifetime of 5000 Hrs @ 105°C. Identical physical dimensions. ROHS3 compliant. Provides design margin for voltage transients.
ELHS451VSN221MQ35S (Chemi-Con): Elevated voltage rating of 450 V (versus 400 V) with extended lifetime of 5000 Hrs @ 105°C. Extended operating temperature range (-40°C to 105°C). Slightly increased dimensions. RoHS compliant. Suitable for demanding thermal environments.

Voltage-Rated Upgrade Substitution:

LQSW6221MELA35 (Nichicon): Elevated voltage rating of 420 V (versus 400 V). Maintains 3000 Hrs @ 105°C lifetime and identical physical dimensions. ROHS3 compliant. Provides design margin without extended lifetime requirements.

Not Recommended for New Designs:

B43508B9227M000 (EPCOS - TDK Electronics): Product status is "Not For New Designs." Although electrically equivalent with 220 µF, 400 V, 3000 Hrs @ 105°C rating, this part should not be selected for new circuit designs. Existing inventory may be used for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SLP221M400C5P3 with a part rated at 450 V instead of 400 V?

A: Yes. A higher voltage rating (450 V) is a direct upgrade and provides additional design margin. The 450VXH220MEFCSN25X35 and ELHS451VSN221MQ35S are both rated at 450 V with 220 µF capacitance and are mechanically compatible. Verify that the circuit board layout accommodates the physical dimensions of the selected substitute.

Q: What is the difference between a 3000-hour and 5000-hour lifetime rating?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before the capacitor reaches end-of-life criteria. A 5000-hour rating provides extended service life compared to 3000 hours. For applications requiring enhanced reliability or extended service intervals, select parts with 5000-hour ratings such as 400VXH220MEFCSN25X30, LGX2G221MELA35, 450VXH220MEFCSN25X35, or ELHS451VSN221MQ35S.

Q: Are there physical dimension differences between substitute parts?

A: Yes. While all substitute parts maintain the same 0.984" diameter (25.00 mm) and 0.394" lead spacing (10.00 mm), height varies between 1.260" (32.00 mm) and 1.476" (37.50 mm). The original SLP221M400C5P3 is 1.457" (37.00 mm) tall. Verify that the selected substitute fits within the available board space. Reduced-height options (400MXK220MEFCSN25X30, 400VXH220MEFCSN25X30, EKMS401VSN221MQ30S) are suitable for space-constrained designs.

Q: Which substitute part has the lowest ESR?

A: ESR (Equivalent Series Resistance) data is not provided for most substitute parts. The original SLP221M400C5P3 specifies 1.508 Ohm @ 120 Hz. The B43508B9227M000 specifies 560 mOhm @ 100 Hz, indicating superior low-frequency performance. However, B43508B9227M000 carries "Not For New Designs" status and should not be selected for new applications.

Q: Can I use the B43508B9227M000 as a substitute?

A: The B43508B9227M000 is electrically equivalent with 220 µF, 400 V, 3000 Hrs @ 105°C rating. However, its product status is "Not For New Designs." This part should be used only for maintenance of existing systems where the original part is no longer available. For new designs, select from Active-status alternatives such as 400MXK220MEFCSN25X30, 400VXH220MEFCSN25X30, EKMS401VSN221MQ30S, LGX2G221MELA35, or 400HXG220MEFCSN25X35.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts are ROHS3 compliant. The ELHS451VSN221MQ35S is listed as "RoHS Compliant" without the "3" designation. Verify compliance requirements for your specific application before selection.

Q: What is the difference between the Rubycon MXK, VXH, HXG, and MXG series?

A: All four Rubycon series maintain 220 µF, 400 V capacitance with ±20% tolerance and are packaged as radial, can snap-in components. The MXK series (400MXK220MEFCSN25X30) provides 3000 Hrs @ 105°C with reduced height. The VXH series (400VXH220MEFCSN25X30) provides extended 5000 Hrs @ 105°C with reduced height. The HXG series (400HXG220MEFCSN25X35) and MXG series (400MXG220MEFCSN25X35) both provide 3000 Hrs @ 105°C with full height matching the original part. Selection depends on available board space and required operational lifetime.

Q: Can I substitute with a part from a different manufacturer?

A: Yes. All listed substitute parts from Rubycon, EPCOS - TDK Electronics, Chemi-Con, and Nichicon are electrically and mechanically compatible with the SLP221M400C5P3. Verify that the selected manufacturer's part meets your application's reliability, compliance, and performance requirements.

Q: What does "Parametric Equivalent" mean?

A: Parametric equivalents maintain identical electrical specifications (220 µF, 400 V, ±20%, 3000 Hrs @ 105°C) but may have different physical dimensions or ripple current ratings. The 400HXG220MEFCSN25X35 and 400MXG220MEFCSN25X35 are parametric equivalents with identical dimensions to the original part but different internal construction and ripple current handling. These parts are suitable for direct substitution when physical dimensions match the circuit board layout.

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