Equivalent & Substitute Parts for 335CKS050M

Part Overview

The Cornell Dubilier 335CKS050M is a 3.3 µF, 50 V aluminum electrolytic capacitor in radial, can package configuration. This component is classified as Active and is designed for general-purpose applications requiring through-hole mounting. The part is ROHS3 compliant and rated for 2000 hours at 85°C operating temperature.

Substitute parts are necessary when the original 335CKS050M becomes unavailable due to inventory constraints, manufacturing discontinuation, or when design requirements necessitate enhanced performance characteristics such as extended lifetime ratings or higher voltage ratings.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the 335CKS050M is determined by the following critical parameters:

Primary Substitution Criteria:

Capacitance: 3.3 µF (exact match required)
Voltage Rating: 50 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.079" (2.00mm) (exact match required)
Size / Dimension: 0.197" Dia (5.00mm) (exact match required)

Secondary Performance Considerations:

Lifetime @ Temperature: 2000 Hrs @ 85°C (minimum baseline; extended ratings acceptable)
Operating Temperature Range: -40°C ~ 85°C (minimum baseline; extended ranges acceptable)
RoHS Status: ROHS3 Compliant (required for regulatory compliance)

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria at 50 V rating) and Upgrade Options (matching all primary criteria with enhanced voltage ratings or extended lifetime specifications).

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ Temp.	Operating Temp. Range	Height (Max)	Product Status	RoHS Status
335CKS050M	Cornell Dubilier / Illinois Capacitor	3.3	50	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50mm)	Active	ROHS3 Compliant
ECA-1HM3R3	Panasonic Electronic Components	3.3	50	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.472" (12.00mm)	Active	ROHS3 Compliant
ESH335M050AC3AA	KEMET	3.3	50	±20%	2000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50mm)	Active	ROHS3 Compliant
UPM1H3R3MDD	Nichicon	3.3	50	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50mm)	Obsolete	ROHS3 Compliant
UPS1H3R3MDD	Nichicon	3.3	50	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50mm)	Obsolete	ROHS3 Compliant
50YXJ3.3M5X11	Rubycon	3.3	50	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50mm)	Active	ROHS3 Compliant
50YXJ3R3M5X11	Rubycon	3.3	50	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50mm)	Active	ROHS3 Compliant
ECA-2AM3R3	Panasonic Electronic Components	3.3	100	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.472" (12.00mm)	Active	ROHS3 Compliant
100YXJ3.3M5X11	Rubycon	3.3	100	±20%	5000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50mm)	Active	ROHS3 Compliant
ESK335M100AC3AA	KEMET	3.3	100	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50mm)	Active	ROHS3 Compliant
UPM2A3R3MDD	Nichicon	3.3	100	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50mm)	Obsolete	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Substitutes (50 V Rating):

The following parts provide direct electrical and mechanical equivalence to the 335CKS050M:

ECA-1HM3R3 (Panasonic): Active product status with identical electrical specifications. Height dimension is 0.472" (12.00mm), which is 0.020" shorter than the original part. This dimension difference is within typical PCB layout tolerances for through-hole radial capacitors.
ESH335M050AC3AA (KEMET): Active product status with extended operating temperature range (-40°C ~ 105°C) and elevated temperature lifetime rating (2000 Hrs @ 105°C). Maintains identical height dimension to the original part.
50YXJ3.3M5X11 and 50YXJ3R3M5X11 (Rubycon): Active product status with significantly extended lifetime rating (5000 Hrs @ 105°C) and expanded operating temperature range (-40°C ~ 105°C). Both parts maintain identical physical dimensions to the original part.

Upgrade Substitutes (100 V Rating):

The following parts provide enhanced voltage ratings while maintaining 3.3 µF capacitance and ±20% tolerance:

ECA-2AM3R3 (Panasonic): Active product status with 100 V rating. Height dimension is 0.472" (12.00mm).
100YXJ3.3M5X11 (Rubycon): Active product status with 100 V rating and extended lifetime (5000 Hrs @ 105°C). Maintains identical height dimension to the original part.
ESK335M100AC3AA (KEMET): Active product status with 100 V rating and identical height dimension to the original part.

Obsolete Parts (Not Recommended for New Designs):

UPM1H3R3MDD, UPS1H3R3MDD, and UPM2A3R3MDD (Nichicon): All classified as Obsolete. These parts are suitable only for replacement in existing applications where original part sourcing is unavailable.

Recommended Selection Criteria:

For new designs and standard replacements, select from Active product status parts. The Rubycon YXJ series (50YXJ3.3M5X11, 50YXJ3R3M5X11, 100YXJ3.3M5X11) offers the longest operational lifetime (5000 Hrs @ 105°C) and widest temperature range. For applications requiring exact dimensional matching to the original part, select parts with 0.492" (12.50mm) height specification.

Frequently Asked Questions (FAQ)

Q: Can the 335CKS050M be replaced with a 100 V rated capacitor?

A: Yes. A 100 V rated capacitor with identical 3.3 µF capacitance and ±20% tolerance is electrically compatible. The higher voltage rating provides additional safety margin in the circuit. Parts such as ECA-2AM3R3, 100YXJ3.3M5X11, and ESK335M100AC3AA are suitable replacements.

Q: What is the significance of the height dimension difference between substitute parts?

A: The 335CKS050M has a maximum seated height of 0.492" (12.50mm). Some substitutes, such as ECA-1HM3R3 and ECA-2AM3R3, have a maximum height of 0.472" (12.00mm). This 0.020" difference is within standard PCB layout tolerances for through-hole components and does not affect electrical performance or mechanical fit in most applications.

Q: Are Obsolete parts suitable for new product designs?

A: No. Obsolete parts such as UPM1H3R3MDD, UPS1H3R3MDD, and UPM2A3R3MDD are classified as end-of-life and should not be specified for new designs. These parts are appropriate only for field replacement or repair of existing equipment where the original part number is required.

Q: What is the difference between the Rubycon 50YXJ3.3M5X11 and 50YXJ3R3M5X11?

A: Both parts are electrically and mechanically identical. They share the same capacitance (3.3 µF), voltage rating (50 V), tolerance (±20%), lifetime (5000 Hrs @ 105°C), and physical dimensions. The part number variation reflects internal manufacturing designations but does not affect performance or compatibility.

Q: Does the extended lifetime rating of substitute parts affect circuit performance?

A: No. Extended lifetime ratings (such as 5000 Hrs @ 105°C versus 2000 Hrs @ 85°C) indicate longer operational durability under specified temperature conditions. They do not alter the electrical characteristics or performance of the capacitor in the circuit. The capacitance, voltage rating, tolerance, and ESR remain the primary performance parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant, matching the regulatory compliance status of the original 335CKS050M.

Q: Can the 335CKS050M be used in automotive applications?

A: The original 335CKS050M is specified for general-purpose applications. However, substitute parts such as UPM1H3R3MDD and UPM2A3R3MDD carry AEC-Q200 automotive ratings. If automotive qualification is required, these parts or other automotive-rated alternatives should be selected.

Q: What is the impact of ESR (Equivalent Series Resistance) on substitute selection?

A: The original 335CKS050M specifies ESR of 50.238 Ohm @ 120Hz. Most substitute parts do not provide ESR specifications in the available data. For applications where ESR is a critical parameter, direct measurement or manufacturer consultation is required. The Rubycon YXJ series provides impedance specifications (2.2 Ohms for 50 V variants, 2.7 Ohms for 100 V variant) which correlate to lower ESR performance.

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