SXR331M100ST Equivalent & Substitute Parts

Part Overview

The SXR331M100ST is a 330 µF, 100 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, through-hole configuration. This component is classified as obsolete, indicating that the original manufacturer has discontinued production. The SXR series capacitor is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial temperature ranges.

Due to the obsolete status of the SXR331M100ST, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for production, repair, and maintenance applications.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	100	V
Tolerance	±20%	—
Operating Temperature Range	-40°C to 105°C	—
Lifetime @ Temperature	5000	Hrs @ 105°C
Polarization	Polar	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Lead Spacing	0.295"	(7.50 mm)
Size / Dimension	0.709" Dia	(18.00 mm)
Height - Seated (Max)	1.417"	(36.00 mm)
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SXR331M100ST is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: Equal to or greater than 100 V
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.295" (7.50 mm) (exact match required)
Size / Dimension: 0.709" Dia (18.00 mm) (exact match required)
Operating Temperature Range: -40°C to 105°C (minimum requirement)
RoHS Status: ROHS3 Compliant (exact match required)

Substitution Categories:

Upgrade Substitutes meet all primary criteria with enhanced voltage rating (200 V) and extended lifetime (10000 Hrs @ 105°C), providing superior performance margins while maintaining identical physical footprint and electrical compatibility.

Similar Substitutes meet all primary criteria with identical voltage rating (100 V) but may have variations in physical height, lifetime rating, or impedance characteristics. These parts are direct functional equivalents suitable for direct replacement.

Parameter Comparison

Parameter	SXR331M100ST (Main)	EKXG201ELL331MMP1S (Upgrade)	UCS2D331MHD (Upgrade)	EKZE101ELL331MM20S (Similar)	UPW2A331MHD (Similar)
Manufacturer	Cornell Dubilier Electronics	Chemi-Con	Nichicon	Chemi-Con	Nichicon
Series	SXR	KXG	UCS	KZE	UPW
Product Status	Obsolete	Active	Active	Active	Not For New Designs
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	100 V	200 V	200 V	100 V	100 V
ESR @ 120Hz	280 mOhm	—	—	—	—
Lifetime @ Temp.	5000 Hrs @ 105°C	10000 Hrs @ 105°C	10000 Hrs @ 105°C	5000 Hrs @ 105°C	8000 Hrs @ 105°C
Operating Temperature	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-55°C to 105°C
Polarization	Polar	Polar	Polar	Polar	Polar
Ripple Current @ 120 Hz	823.4 mA	1.43 A	1.61 A	750 mA	702 mA
Ripple Current @ 100 kHz	1.79 A	3.2175 A	3.22 A	1.5 A	1.08 A
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Size / Dimension	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)	0.709" Dia (18.00 mm)	0.630" Dia (16.00 mm)
Height - Seated (Max)	1.417" (36.00 mm)	1.398" (35.50 mm)	1.457" (37.00 mm)	0.846" (21.50 mm)	0.984" (25.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Upgrade Substitution (Preferred for New Designs):

The EKXG201ELL331MMP1S (Chemi-Con KXG series) and UCS2D331MHD (Nichicon UCS series) are recommended as primary upgrade substitutes. Both parts are manufactured by active suppliers with established product lines and are ROHS3 compliant. These upgrade substitutes provide doubled voltage rating (200 V) and doubled lifetime rating (10000 Hrs @ 105°C), delivering enhanced reliability margins while maintaining identical physical footprint and lead spacing. The UCS2D331MHD offers the highest inventory availability (4350 Pcs) among all substitute options.

For Direct Replacement (Maintenance and Repair):

The EKZE101ELL331MM20S (Chemi-Con KZE series) provides direct electrical equivalence with identical voltage rating (100 V) and lifetime rating (5000 Hrs @ 105°C). This part is manufactured by an active supplier and is ROHS3 compliant. The KZE series offers the highest inventory availability (17807 Pcs) and is suitable for direct replacement in existing designs where voltage and lifetime specifications match the original requirement.

The UPW2A331MHD (Nichicon UPS series) is classified as "Not For New Designs" and should be reserved for maintenance applications only where existing inventory or design constraints require this specific part number.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant, matching the compliance status of the original SXR331M100ST. All parts are suitable for through-hole mounting on standard PCB layouts with 0.295" (7.50 mm) lead spacing.

Frequently Asked Questions (FAQ)

Q: Can the EKXG201ELL331MMP1S or UCS2D331MHD be used as direct replacements for the SXR331M100ST?

A: Yes. Both upgrade substitutes meet all primary substitution criteria: identical capacitance (330 µF), tolerance (±20%), polarization (polar), mounting type (through-hole), package type (radial can), lead spacing (0.295"), and can diameter (0.709"). The 200 V voltage rating exceeds the 100 V requirement, providing additional safety margin. Physical height variations are within acceptable PCB layout tolerances for through-hole applications.

Q: What is the difference between upgrade and similar substitutes?

A: Upgrade substitutes (EKXG201ELL331MMP1S and UCS2D331MHD) feature doubled voltage rating (200 V vs. 100 V) and doubled lifetime rating (10000 Hrs vs. 5000 Hrs @ 105°C), providing enhanced performance margins. Similar substitutes (EKZE101ELL331MM20S and UPW2A331MHD) maintain identical electrical specifications to the original part but are sourced from active manufacturers. Both categories are electrically compatible for direct replacement.

Q: Are there physical footprint differences between these parts?

A: All substitute parts maintain the critical lead spacing of 0.295" (7.50 mm) and can diameter of 0.709" (18.00 mm), ensuring PCB compatibility. Height variations exist: the EKZE101ELL331MM20S is significantly shorter (0.846" vs. 1.417"), while the UCS2D331MHD is slightly taller (1.457" vs. 1.417"). These height differences do not affect electrical function but should be verified against available PCB clearance in the target application.

Q: Which substitute offers the best inventory availability?

A: The EKZE101ELL331MM20S (Chemi-Con KZE series) offers the highest inventory availability with 17807 Pcs in stock. The UCS2D331MHD (Nichicon UCS series) provides the second-highest availability with 4350 Pcs. Both parts are suitable for immediate procurement.

Q: Why is the UPW2A331MHD marked as "Not For New Designs"?

A: The UPW2A331MHD is classified as "Not For New Designs" by the manufacturer, indicating that this product line is in end-of-life status. This part should be used only for maintenance and repair of existing equipment where design constraints or existing inventory require this specific part number. For new designs, the EKZE101ELL331MM20S or upgrade substitutes are recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (EKXG201ELL331MMP1S, UCS2D331MHD, EKZE101ELL331MM20S, and UPW2A331MHD) are ROHS3 compliant, matching the compliance status of the original SXR331M100ST.

Q: What ripple current specifications should be considered when selecting a substitute?

A: Ripple current capacity varies among substitutes. The upgrade substitutes (EKXG201ELL331MMP1S and UCS2D331MHD) provide higher ripple current ratings (1.43–1.61 A @ 120 Hz and 3.2–3.22 A @ 100 kHz) compared to the original part (823.4 mA @ 120 Hz and 1.79 A @ 100 kHz). The similar substitutes provide comparable or slightly lower ripple current ratings. Selection should be based on the specific ripple current requirements of the target application.

Q: Can these parts be used interchangeably in existing circuit designs?

A: Yes, within the constraints of physical clearance and ripple current requirements. All substitute parts maintain identical capacitance, tolerance, polarization, and lead spacing. Designs operating at or near the original 100 V rating should consider the upgrade substitutes for enhanced voltage margin. Designs with tight PCB clearance should verify the height specifications of the selected substitute.

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