SLP221M350C5P3 Equivalent & Substitute Parts Reference

Part Overview

The SLP221M350C5P3 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 classified as Active product status and is designed for general-purpose applications requiring through-hole mounting with a 10.00 mm lead spacing and 25.00 mm diameter form factor.

Substitute parts are necessary when the original SLP221M350C5P3 becomes unavailable, when design requirements demand higher voltage ratings or extended operational lifetime, or when alternative manufacturers' components offer improved performance characteristics within the same physical and electrical envelope.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	220	µF	Must match exactly
Voltage - Rated	350	V	Substitutes must equal or exceed
Tolerance	±20%	%	Must match
Lifetime @ Temperature	3000	Hrs @ 105°C	Substitutes must equal or exceed
Operating Temperature Range	-25°C ~ 105°C	°C	Substitutes must cover or exceed
Lead Spacing	10.00	mm	Must match for PCB compatibility
Size / Dimension	25.00	mm Dia	Must match for mechanical fit
Height - Seated (Max)	37.00	mm	Must match for clearance
Package / Case	Radial, Can - Snap-In	-	Must match
Mounting Type	Through Hole	-	Must match
Polarization	Polar	-	Must match
RoHS Status	ROHS3 Compliant	-	Substitutes must maintain compliance

Substitute Part Grouping Explanation

Substitution logic for the SLP221M350C5P3 is determined by strict adherence to the following criteria:

Mandatory Matching Parameters:

Capacitance: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Size / Dimension: 25.00 mm diameter (exact match required)
Height - Seated (Max): 37.00 mm (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Allowable Upgrade Parameters:

Voltage - Rated: Substitutes must equal or exceed 350 V
Lifetime @ Temperature: Substitutes must equal or exceed 3000 Hrs @ 105°C
Operating Temperature Range: Substitutes must cover or exceed -25°C ~ 105°C
RoHS Status: Substitutes must maintain ROHS3 Compliance or equivalent

All substitute parts listed below satisfy these criteria and are electrically and mechanically compatible with the original SLP221M350C5P3 component.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Lead Spacing (mm)	Size Dia (mm)	Height (mm)	Product Status	RoHS Status
SLP221M350C5P3	Cornell Dubilier Electronics (CDE)	220	350	±20	3000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
400HXG220MEFCSN25X35	Rubycon	220	400	±20	3000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
400MXG220MEFCSN25X35	Rubycon	220	400	±20	3000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
450VXH220MEFCSN25X35	Rubycon	220	450	±20	5000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
B43508B9227M000	EPCOS - TDK Electronics	220	400	±20	3000	-40 ~ 105	10.00	25.00	37.00	Not For New Designs	ROHS3 Compliant
ELHS451VSN221MQ35S	Chemi-Con	220	450	±20	5000	-40 ~ 105	10.00	25.40	37.50	Active	RoHS Compliant
LGN2G221MELA35	Nichicon	220	400	±20	3000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
LGX2G221MELA35	Nichicon	220	400	±20	5000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant
LQSW6221MELA35	Nichicon	220	420	±20	3000	-25 ~ 105	10.00	25.00	37.00	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The following parts are recommended as direct substitutes for the SLP221M350C5P3 due to Active product status and full compliance with RoHS3 standards:

LGN2G221MELA35 (Nichicon): Matches all mandatory parameters with 400 V rated voltage and 3000 Hrs lifetime. Active product status ensures long-term availability.
LQSW6221MELA35 (Nichicon): Matches all mandatory parameters with 420 V rated voltage and 3000 Hrs lifetime. Active product status with high inventory availability.
400HXG220MEFCSN25X35 (Rubycon): Matches all mandatory parameters with 400 V rated voltage and 3000 Hrs lifetime. Active product status with extensive inventory.
450VXH220MEFCSN25X35 (Rubycon): Exceeds original specifications with 450 V rated voltage and extended 5000 Hrs lifetime. Active product status suitable for demanding applications.

Extended Lifetime Substitutes:

LGX2G221MELA35 (Nichicon): Provides extended 5000 Hrs lifetime at 105°C while maintaining 400 V rating. Active product status with full RoHS3 compliance.
ELHS451VSN221MQ35S (Chemi-Con): Provides extended 5000 Hrs lifetime at 105°C with 450 V rating and expanded operating temperature range (-40°C ~ 105°C). Active product status. Note: Dimensional tolerance of ±0.40 mm on diameter and ±0.50 mm on height requires PCB layout verification.

Legacy Substitute (Not Recommended for New Designs):

B43508B9227M000 (EPCOS - TDK Electronics): Marked as "Not For New Designs." Use only for replacement in existing equipment where original part is unavailable. Provides 400 V rating and 3000 Hrs lifetime with expanded operating temperature range (-40°C ~ 105°C).

Frequently Asked Questions (FAQ)

Q: Can I use a 400 V rated capacitor in place of the 350 V SLP221M350C5P3?

A: Yes. A higher voltage rating is an allowable upgrade. The 400 V substitutes (LGN2G221MELA35, LQSW6221MELA35, 400HXG220MEFCSN25X35, B43508B9227M000) and 450 V substitutes (450VXH220MEFCSN25X35, ELHS451VSN221MQ35S) are electrically compatible and provide improved voltage margin.

Q: What is the difference between 3000 Hrs and 5000 Hrs lifetime ratings?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation reaches the tolerance limit. The 5000 Hrs rated parts (450VXH220MEFCSN25X35, LGX2G221MELA35, ELHS451VSN221MQ35S) provide extended service life and are suitable for applications requiring higher reliability or continuous operation at elevated temperatures.

Q: Are all substitute parts mechanically compatible with the original SLP221M350C5P3?

A: All listed substitutes match the mandatory mechanical parameters: 10.00 mm lead spacing, 25.00 mm diameter, 37.00 mm height, radial can snap-in package, and through-hole mounting. Exception: ELHS451VSN221MQ35S has dimensional tolerances of ±0.40 mm on diameter (25.40 mm) and ±0.50 mm on height (37.50 mm). Verify PCB layout clearances before substitution.

Q: Why is B43508B9227M000 marked "Not For New Designs"?

A: This EPCOS - TDK Electronics part is in legacy status, indicating the manufacturer is discontinuing production or has transitioned to newer product lines. Use this part only for replacement in existing equipment. For new designs, select from Active status alternatives.

Q: Which substitute offers the best balance of availability and performance?

A: The 450VXH220MEFCSN25X35 (Rubycon) offers the highest inventory availability (1,000,300 pcs), extended 5000 Hrs lifetime, 450 V rating, and Active product status. The LGN2G221MELA35 (Nichicon) provides a cost-effective alternative with 400 V rating, 3000 Hrs lifetime, and Active status with 5,668 pcs available.

Q: Can I substitute ELHS451VSN221MQ35S if my PCB has tight height clearance?

A: The ELHS451VSN221MQ35S has a maximum seated height of 37.50 mm compared to the original 37.00 mm. This 0.50 mm difference may cause clearance issues in space-constrained designs. Verify available clearance above the component before substitution. Alternative 37.00 mm height parts are available from Rubycon and Nichicon.

Q: Are all substitutes RoHS3 compliant?

A: All listed substitutes maintain RoHS compliance. Most are explicitly ROHS3 Compliant. ELHS451VSN221MQ35S is marked as RoHS Compliant, which satisfies regulatory requirements. Verify specific RoHS certification requirements for your application jurisdiction.

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