ESK335M050AC3AA Equivalent & Substitute Parts

Part Overview

The ESK335M050AC3AA is a 3.3 µF, 50 V aluminum electrolytic capacitor manufactured by KEMET in the ESK series. This radial, through-hole component is rated for 2000 hours at 85°C and is designed for general-purpose applications. The part is currently active in production with 6624 units in stock.

Substitute parts are necessary when the original ESK335M050AC3AA becomes unavailable, when design requirements demand enhanced thermal performance, or when higher voltage ratings are required for circuit margin. Alternative manufacturers and series offer equivalent electrical and mechanical specifications while maintaining compatibility with existing PCB layouts and mounting requirements.

Key Parameters

Parameter	Value	Unit
Capacitance	3.3	µF
Voltage - Rated	50	V
Tolerance	±20%	-
Lifetime @ Temperature	2000 Hrs @ 85°C	-
Operating Temperature Range	-40°C ~ 85°C	-
Lead Spacing	0.079" (2.00 mm)	-
Size / Dimension	0.197" Dia (5.00 mm)	-
Height - Seated (Max)	0.492" (12.50 mm)	-
Mounting Type	Through Hole	-
Package / Case	Radial, Can	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the ESK335M050AC3AA are classified into two categories based on electrical parameters:

Direct Equivalents (Same Voltage Rating - 50 V): Direct substitutes maintain identical capacitance (3.3 µF) and voltage rating (50 V) while offering variations in thermal performance, manufacturer, and series designation. These parts are mechanically and electrically interchangeable with the main part when PCB layout and thermal requirements are compatible.

Upgrade Options (Higher Voltage Rating - 100 V): Upgrade substitutes increase the voltage rating to 100 V while maintaining the same 3.3 µF capacitance. These parts provide additional circuit margin and are suitable for applications requiring higher voltage headroom. They occupy the same physical footprint and mounting configuration.

Key Parameters Determining Substitution:

Capacitance: 3.3 µF (fixed)
Voltage Rating: 50 V (direct) or 100 V (upgrade)
Tolerance: ±20% (fixed)
Lead Spacing: 0.079" (2.00 mm) (fixed)
Size / Dimension: 0.197" Dia (5.00 mm) (fixed)
Height - Seated (Max): 0.492" (12.50 mm) or 0.472" (12.00 mm) (compatible)
Mounting Type: Through Hole (fixed)
Package / Case: Radial, Can (fixed)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing (mm)	Height Max (mm)	Product Status	Inventory (Pcs)
ESK335M050AC3AA	KEMET	ESK	3.3	50	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	2.00	12.50	Active	6624
ESH335M050AC3AA	KEMET	ESH	3.3	50	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	2.00	12.50	Active	8794
50YXJ3.3M5X11	Rubycon	YXJ	3.3	50	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	2.00	12.50	Active	2972
ECA-1HM3R3	Panasonic Electronic Components	M-A	3.3	50	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	2.00	12.00	Active	4062
UPM1H3R3MDD	Nichicon	UPM	3.3	50	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	2.00	12.50	Obsolete	1053
UPS1H3R3MDD	Nichicon	UPS	3.3	50	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	2.00	12.50	Obsolete	4182
UVR1H3R3MDD1TA	Nichicon	UVR	3.3	50	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	5.00	12.50	Obsolete	2986
ESK335M100AC3AA	KEMET	ESK	3.3	100	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	2.00	12.50	Active	2014
100YXJ3.3M5X11	Rubycon	YXJ	3.3	100	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	2.00	12.50	Active	3968
50YXJ3R3M5X11	Rubycon	YXJ	3.3	50	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	2.00	12.50	Active	2940
ECA-2AM3R3	Panasonic Electronic Components	M-A	3.3	100	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	2.00	12.00	Active	95666

Engineering Selection Recommendations

For Direct Replacement (50 V Rating):

ESH335M050AC3AA (KEMET) is the primary direct substitute. It maintains identical electrical specifications while offering improved thermal performance with operation to 105°C versus 85°C. Both parts are Active status and ROHS3 compliant. This substitution is suitable when thermal margin enhancement is beneficial.

50YXJ3.3M5X11 (Rubycon) and 50YXJ3R3M5X11 (Rubycon) provide extended lifetime ratings of 5000 hours at 105°C compared to 2000 hours at 85°C for the main part. Both are Active status and ROHS3 compliant. These options are appropriate for applications requiring enhanced reliability and extended operational life.

ECA-1HM3R3 (Panasonic Electronic Components) is an Active status direct equivalent with identical thermal specifications to the main part. Height dimension is 12.00 mm versus 12.50 mm for the ESK335M050AC3AA, which remains compatible with standard PCB layouts.

UPM1H3R3MDD and UPS1H3R3MDD (Nichicon) are Obsolete status parts. While electrically equivalent, their obsolete designation indicates limited future availability. These parts are not recommended for new designs.

UVR1H3R3MDD1TA (Nichicon) is Obsolete status with a lead spacing of 5.00 mm versus the standard 2.00 mm. This dimensional difference requires PCB layout verification before substitution.

For Voltage Upgrade (100 V Rating):

ESK335M100AC3AA (KEMET) is the voltage upgrade option within the same ESK series. It maintains the same physical footprint and mounting configuration while providing double the voltage rating. Active status and ROHS3 compliant.

100YXJ3.3M5X11 (Rubycon) offers voltage upgrade with extended lifetime of 5000 hours at 105°C. Active status and ROHS3 compliant. Suitable for applications requiring both higher voltage margin and enhanced reliability.

ECA-2AM3R3 (Panasonic Electronic Components) is the voltage upgrade equivalent with the highest inventory availability (95666 units). Active status and ROHS3 compliant. Height dimension is 12.00 mm versus 12.50 mm, remaining compatible with standard layouts.

All recommended substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the main part.

Frequently Asked Questions (FAQ)

Q: Can ESH335M050AC3AA replace ESK335M050AC3AA directly on the PCB?

A: Yes. ESH335M050AC3AA is a direct electrical and mechanical equivalent with identical lead spacing (2.00 mm), size (5.00 mm diameter), and height (12.50 mm). The primary difference is enhanced thermal performance to 105°C versus 85°C. No PCB layout modifications are required.

Q: What is the difference between direct substitutes and upgrade options?

A: Direct substitutes maintain the 50 V rating and are electrically interchangeable. Upgrade options increase the voltage rating to 100 V, providing additional circuit margin. Both categories use identical lead spacing and physical dimensions, ensuring mechanical compatibility.

Q: Why would I choose a 100 V rated part instead of the 50 V original?

A: Voltage upgrade options provide circuit margin for applications where voltage transients or design margin are considerations. The 100 V parts occupy the same physical footprint, making them suitable for direct substitution when higher voltage headroom is required.

Q: Are Rubycon YXJ series parts compatible with KEMET ESK series?

A: Yes. Rubycon 50YXJ3.3M5X11 and 50YXJ3R3M5X11 are mechanically and electrically compatible with ESK335M050AC3AA. They share identical lead spacing (2.00 mm), size (5.00 mm diameter), and height (12.50 mm). The primary advantage is extended lifetime rating of 5000 hours at 105°C.

Q: What is the significance of the Obsolete status for Nichicon parts?

A: Obsolete status indicates the manufacturer has discontinued production. While UPM1H3R3MDD, UPS1H3R3MDD, and UVR1H3R3MDD1TA remain electrically equivalent, their availability is limited to existing inventory. These parts are not recommended for new designs or long-term production requirements.

Q: Does UVR1H3R3MDD1TA have a different lead spacing?

A: Yes. UVR1H3R3MDD1TA has a lead spacing of 5.00 mm (0.197") compared to the standard 2.00 mm (0.079") for all other substitutes. This dimensional difference requires PCB layout verification before substitution to ensure pad spacing compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the main part ESK335M050AC3AA.

Q: What is the inventory status for each substitute?

A: ESH335M050AC3AA (8794 units), 50YXJ3.3M5X11 (2972 units), ECA-1HM3R3 (4062 units), UPM1H3R3MDD (1053 units), UPS1H3R3MDD (4182 units), UVR1H3R3MDD1TA (2986 units), ESK335M100AC3AA (2014 units), 100YXJ3.3M5X11 (3968 units), 50YXJ3R3M5X11 (2940 units), and ECA-2AM3R3 (95666 units) are all in stock as new original parts.

Q: Can Panasonic ECA-1HM3R3 be used as a direct replacement?

A: Yes. ECA-1HM3R3 is a direct electrical equivalent with identical specifications. The height dimension is 12.00 mm versus 12.50 mm for the ESK335M050AC3AA, which remains compatible with standard PCB layouts designed for radial capacitors with this footprint.

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