Equivalent & Substitute Parts for LAR2D821MELA35

Part Overview

The LAR2D821MELA35 is an 820 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is active and ROHS3 compliant.

Substitute parts are necessary when the original LAR2D821MELA35 becomes unavailable, when design requirements allow for higher voltage ratings, extended lifetime specifications, or alternative physical dimensions that maintain electrical compatibility within the application circuit.

Key Parameters

Parameter	LAR2D821MELA35
Capacitance	820 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Lead Spacing	10.00 mm
Diameter	25.00 mm
Height	35.00 mm
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LAR2D821MELA35 is determined by the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

Capacitance: 820 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 200 V minimum (equal or higher voltage ratings are acceptable)
Polarization: Polar (exact match required)
Operating Temperature: -40°C ~ 105°C (exact match required)

Mechanical Compatibility Requirements:

Lead Spacing: 10.00 mm (exact match required for PCB hole alignment)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)

Performance Parameters (Flexible):

Lifetime @ 105°C: 2000 Hrs or higher (extended lifetime is acceptable)
Ripple Current: May vary within application tolerance
Physical Dimensions (Diameter/Height): May vary if PCB footprint allows

Substitute parts are grouped into two categories:

Category 1: Same Voltage (200 V) with Extended Lifetime Parts with identical electrical specifications but improved thermal endurance (3000 Hrs @ 105°C instead of 2000 Hrs).

Category 2: Higher Voltage (250 V) with Same Lifetime Parts with elevated voltage rating (250 V) maintaining 820 µF capacitance and 2000 Hrs lifetime, suitable for applications with voltage margin requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Lead Spacing (mm)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz
LAR2D821MELA35	Nichicon	LAR	820 µF	200 V	±20%	2000 Hrs	25.00	35.00	10.00	2.04 A	1.36 A
LAR2E821MELA45	Nichicon	LAR	820 µF	250 V	±20%	2000 Hrs	25.00	45.00	10.00	2.0 A	3.0 A
LAR2E821MELB35	Nichicon	LAR	820 µF	250 V	±20%	2000 Hrs	30.00	35.00	10.00	2.0 A	3.0 A
LGG2D821MELA35	Nichicon	LGG	820 µF	200 V	±20%	2000 Hrs	25.00	37.00	10.00	1.75 A	2.625 A
LGG2D821MELZ40	Nichicon	LGG	820 µF	200 V	±20%	2000 Hrs	22.00	42.00	10.00	1.75 A	2.625 A
LGN2D821MELA35	Nichicon	LGN	820 µF	200 V	±20%	3000 Hrs	25.00	37.00	10.00	2.04 A	3.06 A
LGN2D821MELZ45	Nichicon	LGN	820 µF	200 V	±20%	3000 Hrs	22.00	47.00	10.00	2.04 A	3.06 A
LGU2D821MELA	Nichicon	LGU	820 µF	200 V	±20%	3000 Hrs	25.00	45.00	10.00	2.04 A	3.06 A
LGU2D821MELB	Nichicon	LGU	820 µF	200 V	±20%	3000 Hrs	30.00	30.00	10.00	2.04 A	3.06 A
LGU2D821MELC	Nichicon	LGU	820 µF	200 V	±20%	3000 Hrs	35.00	25.00	10.00	2.04 A	3.06 A
LGW2D821MELA40	Nichicon	LGW	820 µF	200 V	±20%	3000 Hrs	25.00	40.00	10.00	3.08 A	4.62 A

Engineering Selection Recommendations

Direct Substitution (Same Voltage, Same Lifetime): LGG2D821MELA35 and LGG2D821MELZ40 are direct electrical equivalents to LAR2D821MELA35, maintaining 200 V rating and 2000 Hrs @ 105°C lifetime. Selection between these depends on available PCB space: LGG2D821MELA35 matches the original 25 mm diameter and 35 mm height; LGG2D821MELZ40 uses a smaller 22 mm diameter but requires 42 mm height clearance.

Enhanced Reliability Substitution (Same Voltage, Extended Lifetime): LGN2D821MELA35, LGN2D821MELZ45, LGU2D821MELA, LGU2D821MELB, LGU2D821MELC, and LGW2D821MELA40 provide 3000 Hrs @ 105°C lifetime while maintaining 200 V electrical specifications. These are suitable for applications requiring extended operational life. Physical dimensions vary; verify PCB footprint compatibility before selection.

Higher Voltage Substitution (250 V Rating): LAR2E821MELA45 and LAR2E821MELB35 provide 250 V rating with 820 µF capacitance and 2000 Hrs lifetime. These are applicable in circuits where voltage margin is required or where the original 200 V specification allows for uprating. LAR2E821MELA45 requires 45 mm height; LAR2E821MELB35 uses 30 mm diameter but maintains 35 mm height.

All substitute parts are ROHS3 compliant and maintain through-hole radial snap-in package configuration with 10.00 mm lead spacing.

Frequently Asked Questions (FAQ)

Q: Can I use a 250 V rated capacitor in place of a 200 V capacitor? A: Yes. Higher voltage-rated capacitors are electrically compatible in circuits designed for lower voltages. The 250 V parts (LAR2E821MELA45, LAR2E821MELB35) maintain the same 820 µF capacitance and ±20% tolerance, making them suitable substitutes when voltage margin is acceptable.

Q: What is the difference between 2000 Hrs and 3000 Hrs lifetime ratings? A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C). Parts rated for 3000 Hrs (LGN and LGU series) provide extended reliability compared to 2000 Hrs parts (LAR and LGG series). Selection depends on application reliability requirements and expected operating conditions.

Q: Do physical dimension differences affect compatibility? A: Yes. Lead spacing (10.00 mm) must remain constant for PCB hole alignment. Diameter and height variations require verification against available PCB space and component clearance. Verify mechanical fit before substitution.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original LAR2D821MELA35 environmental certification status.

Q: What is the significance of ripple current ratings? A: Ripple current capacity indicates the maximum AC current the capacitor can handle at specified frequencies (120 Hz and 50 kHz). Higher ripple current ratings provide additional thermal margin. Verify application ripple current requirements do not exceed the selected part's rating.

Q: Can I substitute based on series designation alone? A: No. Series designation (LAR, LGG, LGN, LGU, LGW) indicates manufacturer product line but does not guarantee compatibility. All electrical parameters (capacitance, voltage, tolerance, lifetime) and mechanical parameters (lead spacing, mounting type, package style) must match or be verified as acceptable for the application.

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