SXR331M050ST Equivalent & Substitute Parts Reference

Part Overview

The SXR331M050ST is a 330 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 105°C and is suitable for general-purpose applications requiring polar electrolytic capacitor functionality. Substitution is required to maintain component availability and ensure design continuity in production environments.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	50	V
Operating Temperature Range	-40°C to 105°C	—
Polarization	Polar	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Lead Spacing	0.197" (5.00 mm)	—
Size / Dimension	0.394" Dia (10.00 mm)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SXR331M050ST 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: 50 V (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Size / Dimension: 0.394" Dia (10.00 mm) (exact match required)
Operating Temperature: -40°C to 105°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Secondary Performance Parameters (allowable variation):

ESR (Equivalent Series Resistance): May vary based on manufacturer design
Lifetime @ Temperature: May exceed original specification
Ripple Current: May exceed original specification
Height - Seated (Max): Allowable variation within mechanical envelope constraints

All substitute parts listed maintain identical primary electrical and mechanical specifications while potentially offering improved performance characteristics in secondary parameters. Substitution is valid only when all primary criteria are satisfied.

Parameter Comparison

Parameter	SXR331M050ST (Main)	337KBM050MGJD	50YXJ330M10X20	EKYA500ELL331MJ20S	EKZE500ELL331MJ25S	EKZM500ELL331MJ25S	50ZLJ330M10X20
Manufacturer	Cornell Dubilier Electronics	Cornell Dubilier / Illinois Capacitor	Rubycon	Chemi-Con	Chemi-Con	Chemi-Con	Rubycon
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	50 V	50 V	50 V	50 V	50 V	50 V	50 V
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar	Polar	Polar
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Size / Dimension	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)	0.394" Dia (10.00 mm)
Height - Seated (Max)	1.181" (30.00 mm)	1.063" (27.00 mm)	0.866" (22.00 mm)	0.846" (21.50 mm)	1.043" (26.50 mm)	1.043" (26.50 mm)	0.866" (22.00 mm)
ESR @ 120 Hz	400 mOhm	502.4 mOhm	—	—	—	—	—
Lifetime @ 105°C	4000 Hrs	7000 Hrs	10000 Hrs	7000 Hrs	4000 Hrs	10000 Hrs	10000 Hrs
Ripple Current @ 120 Hz	529 mA	740 mA	854 mA	610 mA	935 mA	935 mA	1.133 A
Ripple Current @ 100 kHz	1.15 A	1.48 A	1.22 A	1.22 A	1.87 A	1.87 A	2.06 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Substitution Candidates:

All listed substitute parts satisfy the mandatory primary substitution criteria and are suitable for direct replacement of the SXR331M050ST in circuit applications. Selection among substitute parts should be based on the following factors:

Product Status Consideration: All substitute parts carry Active product status, ensuring long-term availability and manufacturing continuity. The SXR331M050ST is classified as Obsolete, making substitution necessary for new production and ongoing support.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the original component. No additional compliance modifications are required for substitution.

Performance Enhancement: Substitute parts offer equal or improved performance in secondary parameters:

Lifetime ratings range from 4000 to 10000 hours at 105°C, with multiple options exceeding the original 4000-hour specification
Ripple current capabilities range from 610 mA to 1.133 A at 120 Hz, providing design flexibility for applications with varying ripple current demands
ESR values where specified remain within acceptable ranges for general-purpose applications

Mechanical Fit: All substitute parts maintain identical lead spacing (0.197" / 5.00 mm) and diameter (0.394" / 10.00 mm). Height variations range from 0.846" to 1.181", with most options providing reduced height compared to the original specification. Verify PCB layout clearance for applications with height-constrained designs.

Manufacturer Diversity: Substitute parts are available from multiple manufacturers (Cornell Dubilier / Illinois Capacitor, Rubycon, Chemi-Con), providing supply chain flexibility and reducing single-source dependency.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the SXR331M050ST?

A: Yes. All listed substitute parts meet the mandatory primary substitution criteria: 330 µF capacitance, ±20% tolerance, 50 V rating, polar configuration, through-hole mounting, radial can package, 5.00 mm lead spacing, 10.00 mm diameter, -40°C to 105°C operating range, and ROHS3 compliance. Direct substitution is valid for all listed parts.

Q: What is the difference between "Direct Manufacturer Part Number" and "Similar Manufacturer Part Number" classifications?

A: Both classifications indicate parts that meet all primary substitution criteria. The distinction reflects the source data categorization but does not affect substitution validity. All parts listed are electrically and mechanically compatible with the SXR331M050ST.

Q: Does the height difference between substitute parts affect PCB compatibility?

A: Height variations range from 0.846" (21.50 mm) to 1.181" (30.00 mm). Most substitute parts offer reduced height compared to the original 1.181" specification. Verify that your PCB layout accommodates the selected substitute part's maximum seated height. Reduced-height options may provide additional design flexibility.

Q: Are there differences in ESR (Equivalent Series Resistance) between substitute parts?

A: ESR values are provided only for the main part (400 mOhm @ 120 Hz) and one substitute (337KBM050MGJD at 502.4 mOhm @ 120 Hz). Other substitutes do not specify ESR in the provided data. For applications with strict ESR requirements, contact the manufacturer for detailed specifications.

Q: Which substitute part offers the longest operational lifetime?

A: Three substitute parts offer 10000-hour lifetime at 105°C: 50YXJ330M10X20 (Rubycon), EKZM500ELL331MJ25S (Chemi-Con), and 50ZLJ330M10X20 (Rubycon). The original SXR331M050ST specifies 4000 hours. These options provide extended service life for demanding applications.

Q: What is the difference in ripple current capability between substitute parts?

A: Ripple current at 120 Hz ranges from 610 mA (EKYA500ELL331MJ20S) to 1.133 A (50ZLJ330M10X20). Ripple current at 100 kHz ranges from 1.15 A (original) to 2.06 A (50ZLJ330M10X20). Select based on your application's ripple current requirements at the operating frequency.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in radial, can package with through-hole mounting. Lead spacing and diameter are identical across all parts (5.00 mm spacing, 10.00 mm diameter). Packaging format is consistent for PCB assembly compatibility.

Q: What is the inventory status of these substitute parts?

A: All substitute parts are listed as in-stock with quantities ranging from 665 to 10737 pieces. The original SXR331M050ST has 741 pieces in inventory. Verify current availability with your supplier before finalizing procurement decisions.

Q: Do I need to modify my circuit design to use a substitute part?

A: No circuit design modification is required. All substitute parts maintain identical electrical ratings (330 µF, ±20%, 50 V) and operating parameters (-40°C to 105°C). Direct substitution in existing designs is valid without circuit alterations.

Q: Which manufacturers supply these substitute parts?

A: Substitute parts are available from Cornell Dubilier / Illinois Capacitor, Rubycon, and Chemi-Con. Multiple manufacturer options provide supply chain redundancy and procurement flexibility.

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