SXR331M016ST Equivalent & Substitute Parts Reference

Part Overview

The SXR331M016ST is a 330 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production support and design continuity. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 4000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	16	V
ESR @ 120 Hz	640	mOhm
Lifetime @ 105°C	4000	Hrs
Operating Temperature Range	-40 to 105	°C
Ripple Current @ 120 Hz	300	mA
Ripple Current @ 100 kHz	500	mA
Lead Spacing	5.00	mm
Diameter	10.00	mm
Height (Seated Max)	12.00	mm
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SXR331M016ST is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 5.00 mm (exact match required)
Diameter: 10.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Allowable Upgrade Parameters:

Voltage - Rated: May be equal to or greater than 16 V
Operating Temperature Range: May be equal to or broader than -40°C to 105°C
Lifetime @ 105°C: May be equal to or greater than 4000 hours
ESR: May be equal to or lower than 640 mOhm @ 120 Hz
Ripple Current: May be equal to or greater than specified values

Height Tolerance:

Height (Seated Max) may exceed 12.00 mm if mechanical clearance permits in the application

All substitute parts listed below meet these criteria and are qualified for direct replacement in applications where the SXR331M016ST was originally specified.

Parameter Comparison

Parameter	SXR331M016ST (Main)	EKY-250ELL331MJC5S	EKZE250ELL331MJC5S	UPW1E331MPD	UHE1E331MPD6
Manufacturer	Cornell Dubilier Electronics	Chemi-Con	Chemi-Con	Nichicon	Nichicon
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	16 V	25 V	25 V	25 V	25 V
ESR @ 120 Hz	640 mOhm	—	—	—	—
Impedance	—	80 mOhms	53 mOhms	90 mOhms	80 mOhms
Lifetime @ 105°C	4000 Hrs	7000 Hrs	4000 Hrs	5000 Hrs	7000 Hrs
Operating Temperature	-40 to 105°C	-40 to 105°C	-40 to 105°C	-55 to 105°C	-40 to 105°C
Ripple Current @ 120 Hz	300 mA	432.5 mA	515 mA	494 mA	605.5 mA
Ripple Current @ 100 kHz	500 mA	865 mA	1.03 A	760 mA	865 mA
Lead Spacing	5.00 mm	5.00 mm	5.00 mm	5.00 mm	5.00 mm
Diameter	10.00 mm	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Height (Seated Max)	12.00 mm	14.00 mm	14.00 mm	12.50 mm	12.50 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
Polarization	Polar	Polar	Polar	Polar	Polar
Product Status	Obsolete	Active	Active	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Upgrade Path: Chemi-Con EKY-250ELL331MJC5S

The EKY-250ELL331MJC5S is the recommended primary substitute. This part maintains identical capacitance, tolerance, lead spacing, diameter, and mounting configuration. The voltage rating is upgraded from 16 V to 25 V, providing enhanced voltage margin. Lifetime is extended to 7000 hours at 105°C compared to 4000 hours in the original part. The component is currently in active production status, ensuring long-term availability. RoHS3 compliance is maintained. Height increases from 12.00 mm to 14.00 mm; verify mechanical clearance in the application before selection.

Secondary Upgrade Path: Chemi-Con EKZE250ELL331MJC5S

The EKZE250ELL331MJC5S offers equivalent lifetime (4000 hours at 105°C) to the original part while providing 25 V voltage rating. This part features lower impedance (53 mOhms) and higher ripple current capability (1.03 A @ 100 kHz). Active production status and RoHS3 compliance are confirmed. Height is 14.00 mm; mechanical clearance verification is required.

Alternative Path: Nichicon UPW1E331MPD

The UPW1E331MPD is classified as "Not For New Designs" but remains available with 2200 pieces in stock. This part provides 25 V rating, 5000-hour lifetime at 105°C, and extended operating temperature range (-55°C to 105°C). Height is 12.50 mm, minimizing mechanical impact. Use this part only for legacy system support or repair applications where new design constraints do not apply.

Alternative Path: Nichicon UHE1E331MPD6

The UHE1E331MPD6 is classified as "Not For New Designs" but offers the highest inventory availability (25758 pieces in stock) and extended lifetime (7000 hours at 105°C). Voltage rating is 25 V. Height is 12.50 mm. REACH Status is listed as "Affected," requiring compliance verification for specific regulatory jurisdictions. Use this part only for legacy system support where new design constraints do not apply.

Compliance Summary:

All substitute parts maintain ROHS3 compliance and EAR99 ECCN classification. The primary recommendation (EKY-250ELL331MJC5S) is the only substitute in active production status, making it the optimal choice for new designs and long-term production support.

Frequently Asked Questions (FAQ)

Q: Can the SXR331M016ST be directly replaced with a 25 V rated substitute?

A: Yes. All listed substitutes feature 25 V voltage ratings, which are compatible with applications originally designed for 16 V operation. The higher voltage rating provides additional safety margin and does not degrade performance in 16 V circuits.

Q: What is the impact of increased height on mechanical compatibility?

A: The EKY-250ELL331MJC5S and EKZE250ELL331MJC5S have heights of 14.00 mm compared to the original 12.00 mm. The UPW1E331MPD and UHE1E331MPD6 have heights of 12.50 mm. Verify available vertical clearance in the PCB assembly before final part selection. If clearance is limited to 12.00 mm, the UPW1E331MPD or UHE1E331MPD6 are preferred.

Q: Are all substitutes suitable for new product designs?

A: The EKY-250ELL331MJC5S is the only substitute in active production status and is recommended for new designs. The UPW1E331MPD and UHE1E331MPD6 are marked "Not For New Designs" and should be used only for legacy system support or repair applications.

Q: What is the difference between impedance and ESR?

A: ESR (Equivalent Series Resistance) is measured at a specific frequency (120 Hz in this case). Impedance is a broader measure of total opposition to current flow at a given frequency. The original part specifies 640 mOhm ESR @ 120 Hz. Substitute parts list impedance values ranging from 53 to 90 mOhms, all of which are lower than the original ESR, indicating improved performance characteristics.

Q: Do all substitutes maintain the same lead spacing and diameter?

A: Yes. All substitute parts maintain 5.00 mm lead spacing and 10.00 mm diameter, ensuring compatibility with existing PCB footprints and through-hole mounting patterns.

Q: What is the significance of the "Not For New Designs" status?

A: Parts marked "Not For New Designs" are in mature or declining production phases. While they remain available for current orders, manufacturers do not guarantee long-term availability or continued production. These parts are suitable for repair and maintenance of existing systems but should not be specified in new product development.

Q: How does the extended lifetime of 7000 hours compare to the original 4000 hours?

A: The EKY-250ELL331MJC5S and UHE1E331MPD6 offer 75% longer operational life at 105°C. This extended lifetime provides improved reliability and reduced failure rates in applications operating at elevated temperatures for extended periods.

Q: Is REACH compliance status relevant for all applications?

A: REACH compliance is mandatory for products sold in the European Union. The UHE1E331MPD6 is marked "REACH Affected," requiring verification of specific substance restrictions for your target market. The EKY-250ELL331MJC5S and EKZE250ELL331MJC5S are marked "REACH Unaffected," simplifying compliance documentation for EU applications.

Q: Can ripple current ratings be exceeded in the application?

A: No. Ripple current ratings must not be exceeded. All substitute parts feature equal or higher ripple current ratings than the original part, providing additional margin. Verify that your application's actual ripple current does not exceed the selected part's rating.

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