SLPX821M220C4P3 Equivalent & Substitute Parts

Part Overview

The SLPX821M220C4P3 is an 820 µF 220 V aluminum electrolytic capacitor in a radial, snap-in can package manufactured by Cornell Dubilier Electronics (CDE). This part is classified as obsolete, requiring identification of equivalent and substitute components for continued design support and procurement. The SLPX series has been succeeded by active alternatives within the CDE and third-party product portfolios that maintain critical electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	820 µF	Core electrical characteristic; must match for functional equivalence
Voltage Rating	220 V (Main); 200 V, 250 V (Alternatives)	Defines maximum operating voltage; equal or higher ratings acceptable
Tolerance	±20%	Specifies capacitance variation; must remain consistent
ESR @ 120 Hz	243 mOhm (Main); 240–243 mOhm (Substitutes)	Impacts ripple current handling and thermal performance
Lifetime @ Temperature	3000 Hrs @ 85°C (Main); 3000 Hrs @ 85°C or 105°C (Substitutes)	Determines operational lifespan under specified conditions
Operating Temperature Range	-40°C ~ 85°C (Main); -25°C ~ 105°C, -40°C ~ 85°C (Substitutes)	Defines thermal operating limits
Package Type	Radial, Can - Snap-In	Determines mechanical fit and PCB mounting compatibility
Lead Spacing	0.394" (10.00 mm)	Critical for PCB hole pattern alignment
Physical Dimensions	Diameter: 0.984" (25.00 mm); Height: 1.772" (45.00 mm)	Affects board layout and mechanical clearance
RoHS Status	ROHS3 Compliant	Environmental and regulatory requirement

Substitute Part Grouping Explanation

Substitution criteria are based on the following allowed parameters:

Capacitance Value: 820 µF (fixed requirement)
Voltage Rating: 220 V minimum for direct replacement; 200 V and 250 V rated parts are qualified alternatives based on application derating
Tolerance: ±20% (maintained across all variants)
ESR & Ripple Current: Electrical performance within comparable ranges
Lifetime: 3000 Hrs @ temperature rating (maintained)
Package Type & Dimensions: Radial snap-in with 0.394" lead spacing and compatible mechanical envelope
RoHS3 Compliance: Required for current procurement standards

Substitutes are categorized as follows:

Direct Voltage Substitutes (220 V): SLP821M220C4P3, SLPX821M220E5P3, SLPX821M220H3P3

Identical voltage rating (220 V) with identical capacitance and tolerance
Differ in physical dimensions and extended temperature performance in one variant
Mechanical compatibility depends on mounting hole spacing and height clearance

Lower Voltage Alternative (200 V): 380LX821M200J042

Reduced voltage rating (200 V) suitable for applications with lower voltage stress
Slightly lower ESR (240 mOhm) and ripple current capacity
Compact physical profile (1.654" height vs. 1.772" for main part)

Higher Voltage Alternative (250 V): SLPX821M250C9P3

Increased voltage rating provides design margin and wider application flexibility
Identical ESR (243 mOhm) and similar ripple current characteristics
Taller mechanical envelope (1.969" height) requires clearance verification

Third-Party Equivalent (Nichicon): LLS2E821MELA

Alternative manufacturer with identical capacitance, voltage (250 V), and tolerance
Matches mechanical envelope and lead spacing of primary part
Qualifies as manufacturer upgrade based on active product status

Parameter Comparison

Part Number	Manufacturer	Status	Capacitance	Voltage (V)	ESR @ 120 Hz (mOhm)	Lifetime @ Temp	Diameter (mm)	Height (mm)	Op. Temp Range
SLPX821M220C4P3	CDE	Obsolete	820 µF	220	243	3000 @ 85°C	25.00	45.00	-40 to 85°C
SLP821M220C4P3	CDE	Active	820 µF	220	243	3000 @ 105°C	25.00	45.00	-25 to 105°C
SLPX821M220E5P3	CDE	Active	820 µF	220	243	3000 @ 85°C	30.00	35.00	-40 to 85°C
SLPX821M220H3P3	CDE	Active	820 µF	220	243	3000 @ 85°C	35.00	30.00	-40 to 85°C
380LX821M200J042	CDE	Active	820 µF	200	240	3000 @ 85°C	25.00	42.00	-40 to 85°C
SLPX821M250C9P3	CDE	Active	820 µF	250	243	3000 @ 85°C	25.00	50.00	-40 to 85°C
LLS2E821MELA	Nichicon	Active	820 µF	250	Not specified	3000 @ 85°C	25.00	45.00	-40 to 85°C

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select SLP821M220C4P3 when exact voltage and physical compatibility are required. This active CDE part maintains the 220 V rating and snap-in mechanical interface, with the advantage of extended temperature operation (105°C vs. 85°C) providing design margin for thermally demanding applications.

For Temperature-Limited Applications: SLPX821M220E5P3 and SLPX821M220H3P3 are suitable for designs constrained to -40°C to 85°C operating ranges. Both are ROHS3 compliant and active products. Selection between these depends on board layout constraints: SLPX821M220E5P3 offers a wider diameter with reduced height, while SLPX821M220H3P3 has the inverse form factor. Both maintain identical electrical performance to the original part.

For Reduced Voltage Applications: 380LX821M200J042 is appropriate when operating voltage can be derated below 220 V, such as in 110 V AC input circuits with safety margin. This part is mechanically compact and features marginally lower ESR (240 mOhm), improving thermal efficiency.

For Elevated Voltage Margin: SLPX821M250C9P3 provides additional voltage headroom for 220 V applications with inherent stress reduction. The 250 V rating is suitable for circuits expecting voltage transients or operating near nominal specifications. Physical height increase (50 mm vs. 45 mm) must be verified for board clearance.

For Multi-Source Design: LLS2E821MELA (Nichicon) qualifies as an equivalent from an alternative manufacturer. This part maintains mechanical compatibility (25 mm diameter, 45 mm height) and voltage rating (250 V), with confirmed ROHS3 compliance. The absence of specified ESR does not preclude its use; ESR data can be obtained from the manufacturer datasheet if required for thermal analysis.

All recommended substitutes carry ROHS3 compliance and are classified as active products except the original SLPX821M220C4P3.

Frequently Asked Questions (FAQ)

Q: Can the SLPX821M220C4P3 be replaced with a 200 V rated capacitor? A: Yes. The 380LX821M200J042 (200 V, 820 µF) is a qualified substitute for applications where the voltage stress is inherently reduced, such as designs with DC bias or AC input rectification. The lower voltage rating reduces component stress but requires confirmation that the application does not exceed 200 V peak.

Q: What is the difference between SLP821M220C4P3 and SLPX821M220C4P3? A: The key difference is the operating temperature range. SLP821M220C4P3 extends to 105°C (vs. 85°C for SLPX821M220C4P3) with increased lifetime at elevated temperature (3000 Hrs @ 105°C). Both maintain identical 220 V, 820 µF, and mechanical specifications. SLP821M220C4P3 is the recommended active equivalent.

Q: Are the different form factors (SLPX821M220E5P3 and SLPX821M220H3P3) electrically equivalent? A: Yes. Both parts have identical capacitance (820 µF), voltage (220 V), tolerance (±20%), and ESR (243 mOhm). The difference is mechanical: SLPX821M220E5P3 is 30 mm diameter × 35 mm height; SLPX821M220H3P3 is 35 mm diameter × 30 mm height. Selection depends on available PCB board space and height clearance constraints.

Q: Why would I choose a 250 V rated capacitor over 220 V? A: A 250 V rating provides additional safety margin against voltage transients, overvoltage conditions, and component aging. In industrial and high-reliability applications, this reduces failure risk. The trade-off is increased height for the SLPX821M250C9P3 (50 mm), which must be accommodated in board layout.

Q: Is Nichicon LLS2E821MELA a drop-in replacement? A: Mechanically yes: lead spacing (10 mm), diameter (25 mm), and height (45 mm) match the original. Electrically, the 250 V rating and 820 µF capacitance are compatible. ESR is not specified in available data; obtain the Nichicon datasheet for ESR and ripple current confirmation if these parameters are critical to application performance.

Q: What should I verify when substituting these capacitors? A: Confirm the following: (1) board PCB hole spacing and lead diameter compatibility; (2) clearance above and around the capacitor for the selected physical dimensions; (3) voltage rating adequacy for the application (equal or higher is acceptable); (4) operating temperature range of the selected part covers the application environment; (5) ripple current capability meets design requirements (compare @ 120 Hz and 20 kHz as applicable).

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitutes, including the Nichicon LLS2E821MELA, carry ROHS3 compliance certification, meeting current environmental and regulatory standards for electronic components in EU and similar markets.

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