SLPX821M350H4P3 Equivalent & Substitute Parts Reference

Part Overview

The SLPX821M350H4P3 is an 820 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 high-capacitance energy storage at elevated voltage ratings. The part is ROHS3 compliant and suitable for through-hole mounting configurations.

Equivalent and substitute parts are identified to address inventory availability, extended thermal performance requirements, or enhanced electrical characteristics while maintaining functional compatibility within the specified parameter envelope.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	820	µF	Critical - must match exactly
Voltage - Rated	350 / 400	V	Critical - equal or higher acceptable
Tolerance	±20%	%	Critical - must match
Package / Case	Radial, Can - Snap-In	-	Critical - physical compatibility
Lead Spacing	10.00	mm	Critical - PCB footprint compatibility
Size / Dimension	35.00 Dia	mm	Critical - mechanical fit
Height - Seated (Max)	47.00	mm	Critical - clearance requirement
Mounting Type	Through Hole	-	Critical - assembly compatibility
Operating Temperature	-25°C ~ 85°C / -25°C ~ 105°C	°C	Important - thermal environment
Lifetime @ Temp.	3000 Hrs @ 85°C / 3000 Hrs @ 105°C	Hrs	Important - reliability specification
RoHS Status	ROHS3 Compliant	-	Regulatory - compliance requirement

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on their relationship to the main part SLPX821M350H4P3:

Upgrade Substitutes (B43642A9827M000, LGN2V821MELC45, LQS2V821MELC45): These parts maintain identical capacitance (820 µF), tolerance (±20%), and physical dimensions while offering enhanced electrical performance or extended thermal ratings. The voltage rating may be equal or higher. These parts are direct functional replacements with improved or equivalent specifications.

Parametric Equivalent (LLS2V821MELC): This part matches all critical electrical and mechanical parameters of the main part, including capacitance, voltage rating, tolerance, package type, lead spacing, and physical dimensions. It serves as a direct equivalent from an alternative manufacturer.

Substitution Criteria:

Capacitance: 820 µF (exact match required)
Voltage Rating: 350 V minimum (400 V acceptable as upgrade)
Tolerance: ±20% (exact match required)
Package: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Size: 35.00 mm diameter, 47.00 mm height maximum (exact match required)
Mounting: Through Hole (exact match required)
Compliance: ROHS3 Compliant (maintained across all substitutes)

Parameter Comparison

Parameter	SLPX821M350H4P3 (Main)	B43642A9827M000	LGN2V821MELC45	LQS2V821MELC45	LLS2V821MELC
Manufacturer	Cornell Dubilier Electronics	EPCOS - TDK Electronics	Nichicon	Nichicon	Nichicon
Series	SLPX	B43642	LGN	LQS	LLS
Capacitance	820 µF	820 µF	820 µF	820 µF	820 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	350 V	400 V	350 V	350 V	350 V
ESR @ Frequency	243 mOhm @ 120 Hz	110 mOhm @ 100 Hz	Not specified	Not specified	Not specified
Lifetime @ Temp.	3000 Hrs @ 85°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 85°C
Operating Temperature	-25°C ~ 85°C	-40°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 85°C
Ripple Current @ 120 Hz	3.47 A	3 A	1.9 A	1.9 A	3.47 A
Ripple Current @ High Frequency	5.1 A @ 20 kHz	Not specified	2.717 A @ 50 kHz	2.717 A @ 50 kHz	4.9621 A @ 50 kHz
Lead Spacing	10.00 mm	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Size / Dimension	35.00 mm Dia	35.00 mm Dia	35.00 mm Dia	35.00 mm Dia	35.00 mm Dia
Height - Seated (Max)	47.00 mm	47.00 mm	47.00 mm	47.00 mm	47.00 mm
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

B43642A9827M000 (EPCOS - TDK Electronics): This upgrade substitute offers a higher voltage rating of 400 V compared to the 350 V main part, providing additional voltage margin. The ESR is reduced to 110 mOhm at 100 Hz, indicating improved high-frequency performance. Extended thermal rating to 105°C and expanded operating temperature range (-40°C ~ 105°C) support applications requiring enhanced thermal stability. All physical dimensions and mounting characteristics remain identical. ROHS3 compliance is maintained. Selection is appropriate for applications requiring improved thermal performance or higher voltage headroom.

LGN2V821MELC45 (Nichicon): This upgrade substitute maintains the 350 V voltage rating and identical physical dimensions. Operating temperature extends to 105°C with corresponding lifetime rating at 105°C, providing thermal performance improvement over the main part. Ripple current specifications are lower (1.9 A @ 120 Hz) compared to the main part. All mechanical and compliance parameters match. Selection is appropriate for thermal-constrained applications where extended temperature operation is required.

LQS2V821MELC45 (Nichicon): This upgrade substitute is functionally equivalent to LGN2V821MELC45, maintaining 350 V rating, identical physical dimensions, and extended thermal operation to 105°C. Ripple current specifications match LGN2V821MELC45. Selection criteria are identical to LGN2V821MELC45.

LLS2V821MELC (Nichicon): This parametric equivalent maintains all critical specifications of the main part, including 350 V voltage rating, 3000 Hrs @ 85°C lifetime, and identical physical dimensions. Ripple current at 120 Hz (3.47 A) matches the main part exactly. This part serves as a direct equivalent from Nichicon with identical thermal and electrical performance characteristics. Selection is appropriate for direct replacement where manufacturer substitution is acceptable.

All substitute parts maintain ROHS3 compliance and Active product status, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can B43642A9827M000 be used in place of SLPX821M350H4P3?

A: Yes. B43642A9827M000 is an upgrade substitute with identical capacitance (820 µF), tolerance (±20%), and physical dimensions (35.00 mm diameter, 47.00 mm height, 10.00 mm lead spacing). The 400 V rating exceeds the 350 V requirement, providing additional voltage margin. ROHS3 compliance is maintained. Physical compatibility with PCB footprints and snap-in mounting is identical.

Q: What is the difference between LGN2V821MELC45 and LQS2V821MELC45?

A: Both parts are functionally equivalent upgrade substitutes from Nichicon. They share identical electrical specifications (820 µF, ±20%, 350 V), thermal ratings (3000 Hrs @ 105°C), operating temperature range (-25°C ~ 105°C), physical dimensions, and mounting characteristics. Selection between these two parts depends on series availability and inventory considerations.

Q: Is LLS2V821MELC a direct replacement for SLPX821M350H4P3?

A: Yes. LLS2V821MELC is a parametric equivalent with matching capacitance (820 µF), voltage rating (350 V), tolerance (±20%), thermal specification (3000 Hrs @ 85°C), operating temperature range (-25°C ~ 85°C), and identical physical dimensions and lead spacing. Ripple current at 120 Hz is identical (3.47 A). This part provides direct functional equivalence from Nichicon.

Q: Can these substitute parts be used interchangeably on the same PCB?

A: Yes. All substitute parts maintain identical lead spacing (10.00 mm), physical diameter (35.00 mm), and maximum seated height (47.00 mm). The radial, can snap-in package and through-hole mounting type are identical across all parts. PCB footprints and mechanical clearances are compatible.

Q: What is the voltage rating significance when selecting a substitute?

A: The main part SLPX821M350H4P3 is rated for 350 V. Substitute parts with equal or higher voltage ratings (350 V or 400 V) are acceptable. B43642A9827M000 at 400 V provides additional voltage margin and is suitable for the same application. Parts rated below 350 V are not acceptable substitutes.

Q: How do thermal ratings affect substitute selection?

A: The main part is rated for 3000 Hrs @ 85°C with operating temperature range -25°C ~ 85°C. Upgrade substitutes (B43642A9827M000, LGN2V821MELC45, LQS2V821MELC45) extend thermal operation to 105°C with 3000 Hrs @ 105°C rating. These are suitable for applications requiring extended thermal performance. LLS2V821MELC maintains the original 85°C thermal specification. Selection depends on application thermal environment requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (B43642A9827M000, LGN2V821MELC45, LQS2V821MELC45, LLS2V821MELC) maintain ROHS3 compliance, matching the regulatory status of the main part SLPX821M350H4P3.

Q: What does ESR (Equivalent Series Resistance) indicate for substitution purposes?

A: ESR affects high-frequency performance and ripple current handling. The main part specifies 243 mOhm @ 120 Hz. B43642A9827M000 provides lower ESR at 110 mOhm @ 100 Hz, indicating improved high-frequency characteristics. Other substitutes do not specify ESR values. Lower ESR is generally beneficial for ripple current applications but is not a limiting factor for substitution if other parameters match.

Q: Can substitute parts with lower ripple current ratings be used?

A: Ripple current specifications indicate the maximum AC current the capacitor can handle. If the application requires ripple current exceeding the substitute part's rating, that substitute is not appropriate. LGN2V821MELC45 and LQS2V821MELC45 specify 1.9 A @ 120 Hz, lower than the main part's 3.47 A @ 120 Hz. These substitutes are suitable only for applications with ripple current requirements not exceeding their ratings.

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