SLP221M350E3P3 Equivalent & Substitute Parts

Part Overview

The SLP221M350E3P3 is a 220 µF, 350 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 is Active in product status and ROHS3 compliant.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications. Substitutes may offer improved performance characteristics such as higher voltage ratings, extended lifetime ratings, or lower equivalent series resistance while maintaining the same physical footprint and electrical specifications critical to the application.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Voltage - Rated	350	V
Tolerance	±20%	-
ESR @ 120Hz	1.508	Ohm
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-25°C ~ 105°C	-
Lead Spacing	0.394" (10.00mm)	-
Size / Dimension	1.181" Dia (30.00mm)	-
Height - Seated (Max)	1.260" (32.00mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can - Snap-In	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the SLP221M350E3P3 is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Physical Dimensions: 1.181" Dia (30.00mm) and height compatibility (exact match required)
Polarization: Polar (exact match required)

Allowable Variation Parameters:

Voltage - Rated: Substitutes may have equal or higher voltage ratings (350V or greater)
ESR: Substitutes may have equal or lower ESR values
Lifetime @ 105°C: Substitutes may have equal or extended lifetime ratings
Operating Temperature Range: Substitutes must encompass or exceed the original range
Manufacturer: Different manufacturers are acceptable if all other parameters align

All identified substitute parts maintain identical capacitance, tolerance, physical footprint, and snap-in package configuration. Substitutes are grouped by voltage rating tier: 400V upgrades and 450V upgrades, each offering improved electrical performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	ESR @ 120Hz (Ohm)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Lead Spacing (mm)	Size Dia (mm)	Height (mm)	RoHS Status
SLP221M350E3P3	Cornell Dubilier Electronics	220	350	±20%	1.508	3000	-25 ~ 105	10.00	30.00	32.00	ROHS3
381LR221M400K022	Cornell Dubilier Electronics	220	400	±20%	0.603	3000	-25 ~ 105	10.00	30.00	32.00	ROHS3
400HXG220MEFCSN30X30	Rubycon	220	400	±20%	-	3000	-25 ~ 105	10.00	30.00	32.00	ROHS3
450VXG220MEFCSN30X30	Rubycon	220	450	±20%	-	5000	-25 ~ 105	10.00	30.00	32.00	ROHS3
450VXH220MEFCSN30X30	Rubycon	220	450	±20%	-	5000	-25 ~ 105	10.00	30.00	32.00	ROHS3
B43644B5227M007	EPCOS - TDK Electronics	220	450	±20%	0.460	5000	-40 ~ 105	10.00	30.00	32.00	ROHS3
B43644C9227M000	EPCOS - TDK Electronics	220	400	±20%	0.410	5000	-40 ~ 105	10.00	30.00	32.20	ROHS3
ELXS451VSN221MR30S	Chemi-Con	220	450	±20%	-	5000	-25 ~ 105	10.00	30.00	32.50	ROHS3
LGN2W221MELB30	Nichicon	220	450	±20%	-	3000	-25 ~ 105	10.00	30.00	32.00	ROHS3

Engineering Selection Recommendations

All substitute parts listed are Active in product status and ROHS3 compliant, meeting regulatory requirements equivalent to the original SLP221M350E3P3.

400V Tier Substitutes: The 381LR221M400K022 (Cornell Dubilier Electronics) and B43644C9227M000 (EPCOS - TDK Electronics) provide 400V rated alternatives with improved ESR characteristics. The 381LR221M400K022 offers lower ESR at 0.603 Ohm and maintains the same 3000-hour lifetime. The B43644C9227M000 provides extended 5000-hour lifetime with 0.410 Ohm ESR and expanded operating temperature range (-40°C to 105°C). The 400HXG220MEFCSN30X30 (Rubycon) is a 400V option with 3000-hour lifetime rating.

450V Tier Substitutes: The 450VXH220MEFCSN30X30 (Rubycon) offers the highest inventory availability (273,782 pcs) with 450V rating and 5000-hour lifetime. The B43644B5227M007 (EPCOS - TDK Electronics) provides 450V with 5000-hour lifetime, lowest ESR at 0.460 Ohm, and extended operating temperature range (-40°C to 105°C). The 450VXG220MEFCSN30X30 (Rubycon) and ELXS451VSN221MR30S (Chemi-Con) are alternative 450V options with 5000-hour lifetimes. The LGN2W221MELB30 (Nichicon) is a 450V option maintaining the original 3000-hour lifetime.

Selection between 400V and 450V substitutes depends on circuit voltage requirements. All substitutes maintain identical physical footprint and snap-in mounting compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can the SLP221M350E3P3 be replaced with a 400V or 450V rated substitute?

A: Yes. Higher voltage-rated capacitors are direct substitutes when all other parameters match. A 400V or 450V capacitor operates safely in a 350V circuit application. Voltage rating indicates the maximum voltage the capacitor can withstand; operation at lower voltages presents no compatibility issue.

Q: Are all substitute parts physically identical to the original SLP221M350E3P3?

A: All substitute parts share the same lead spacing (10.00mm), diameter (30.00mm), and mounting type (Through Hole, Radial, Can - Snap-In). Height dimensions are nominally 32.00mm with minor variations (32.20mm for B43644C9227M000 and 32.50mm for ELXS451VSN221MR30S). These height variations remain within typical PCB assembly tolerances for snap-in mounted components.

Q: What is the significance of ESR (Equivalent Series Resistance) in substitute selection?

A: ESR affects ripple current handling and heat generation. Lower ESR values indicate improved performance. Substitutes with lower ESR ratings (such as B43644B5227M007 at 0.460 Ohm) provide better high-frequency ripple current performance compared to the original 1.508 Ohm ESR.

Q: Do all substitutes have the same lifetime rating as the original part?

A: No. The original SLP221M350E3P3 has a 3000-hour lifetime at 105°C. Several substitutes offer extended 5000-hour lifetimes (381LR221M400K022, B43644C9227M000, 450VXG220MEFCSN30X30, 450VXH220MEFCSN30X30, B43644B5227M007, and ELXS451VSN221MR30S). Extended lifetime ratings provide improved reliability in long-term applications.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the regulatory compliance status of the original SLP221M350E3P3.

Q: What is the difference between the Rubycon 450VXG and 450VXH models?

A: Both are 450V, 220µF snap-in capacitors with 5000-hour lifetimes and identical physical dimensions. The 450VXH220MEFCSN30X30 has significantly higher inventory availability (273,782 pcs versus 1,093 pcs for the 450VXG model). Both are functionally equivalent for circuit applications.

Q: Can I use a substitute with an extended operating temperature range?

A: Yes. Substitutes with expanded operating temperature ranges (such as B43644B5227M007 and B43644C9227M000 rated -40°C to 105°C) are compatible with applications requiring the original -25°C to 105°C range. The extended range provides additional design margin for extreme temperature environments.

Q: How do I verify physical compatibility before installation?

A: Confirm that lead spacing (10.00mm), can diameter (30.00mm), and snap-in mounting type match your PCB layout. Height dimensions should be verified against available PCB clearance; all substitutes are within 32.00mm to 32.50mm seated height, which accommodates standard through-hole snap-in mounting specifications.

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