SXR221M016ST

Part Overview

The SXR221M016ST is a 220 µF, 16 V aluminum electrolytic capacitor in radial configuration manufactured by Cornell Dubilier Electronics (CDE). This component operates across a temperature range of -40°C to 105°C with a lifetime rating of 3000 hours at 105°C. The part is classified as obsolete, necessitating identification of suitable substitute components for continued circuit functionality and component sourcing continuity.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	16 V
Tolerance	±20%
ESR @ 120 Hz	970 mOhm
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Ripple Current @ 120 Hz	240 mA
Ripple Current @ 100 kHz	400 mA
Lead Spacing	0.138" (3.50 mm)
Case Diameter	0.315" (8.00 mm)
Height (Max)	0.433" (11.00 mm)
Package Type	Radial, Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SXR221M016ST is determined by matching electrical and mechanical parameters within allowable tolerances. The critical selection criteria are:

Direct Substitutes (16 V Rating): Parts maintaining the 16 V voltage rating with identical 220 µF capacitance and 3000 hour lifetime at 105°C. These include the UPW1C221MPD (Nichicon), which matches the original voltage specification and temperature requirements while maintaining identical physical dimensions and radial through-hole mounting configuration.

Upgrade Substitutes (25 V Rating): Parts with elevated voltage ratings (25 V) and improved reliability metrics. These include:

25ML220MEFC8X9 (Rubycon) — 5000 hour lifetime at 105°C
EEU-EB1E221S (Panasonic) — 5000 hour lifetime at 105°C, active product status
UHE1E221MPD (Nichicon) — 7000 hour lifetime at 105°C
UPW1E221MPD (Nichicon) — 3000 hour lifetime at 105°C

Similar Performance Parts: EEU-FM1E221 (Panasonic) operates at 25 V with superior ripple current handling (665 mA @ 120 Hz vs. 240 mA for the original) and lower impedance (56 mOhms).

All substitute candidates maintain the 220 µF capacitance value, ±20% tolerance, 0.138" lead spacing, 0.315" case diameter, and radial through-hole mounting type. Voltage derating from 25 V to 16 V applications provides added safety margin.

Parameter Comparison

Parameter	SXR221M016ST (Main)	UPW1C221MPD	25ML220MEFC8X9	EEU-EB1E221S	UHE1E221MPD	UPW1E221MPD	EEU-FM1E221
Manufacturer	CDE	Nichicon	Rubycon	Panasonic	Nichicon	Nichicon	Panasonic
Capacitance	220 µF	220 µF	220 µF	220 µF	220 µF	220 µF	220 µF
Voltage Rating	16 V	16 V	25 V	25 V	25 V	25 V	25 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	3000 Hrs	3000 Hrs	5000 Hrs	5000 Hrs	7000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature	-40°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C	-40°C ~ 105°C
Lead Spacing	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)	0.138" (3.50 mm)
Case Diameter	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)
Height (Max)	0.433" (11.00 mm)	0.453" (11.50 mm)	0.413" (10.50 mm)	0.492" (12.50 mm)	0.453" (11.50 mm)	0.453" (11.50 mm)	0.512" (13.00 mm)
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Not For New Designs	Not For New Designs	Active	Not For New Designs	Not For New Designs	Active

Engineering Selection Recommendations

For Direct Replacement: The UPW1C221MPD (Nichicon) provides the closest direct substitution, maintaining the identical 16 V voltage rating and 3000 hour lifetime specification. This part is ROHS3 compliant and functionally equivalent within circuit design specifications calling for 16 V operation.

For Upgraded Performance: The EEU-EB1E221S (Panasonic) is the preferred upgrade option due to active product status, indicating continued manufacturing support and long-term availability. This part increases voltage rating to 25 V and extends lifetime to 5000 hours at 105°C while maintaining physical compatibility.

Alternative Upgrade Path: The UHE1E221MPD (Nichicon) offers the extended 7000 hour lifetime at 105°C, providing enhanced reliability for demanding applications. Height deviation of 0.453" (11.50 mm) versus the original 0.433" (11.00 mm) is within typical PCB spacing tolerances.

Enhanced Ripple Current Capability: The EEU-FM1E221 (Panasonic) is suitable for applications requiring elevated ripple current handling (665 mA @ 120 Hz vs. 240 mA original), offering superior performance metrics with active product status and REACH compliance.

All active product status selections ensure continued component availability and manufacturing continuity for long-term production environments.

Frequently Asked Questions (FAQ)

Q: Can UPW1C221MPD directly replace SXR221M016ST in all applications? A: Yes. The UPW1C221MPD maintains identical capacitance (220 µF), voltage rating (16 V), tolerance (±20%), lifetime (3000 hours @ 105°C), lead spacing (0.138"), case diameter (0.315"), and mounting configuration. Height variance of 0.020" (0.50 mm) is within standard PCB design tolerances.

Q: What is the benefit of using 25 V rated substitutes in 16 V circuits? A: Twenty-five volt rated capacitors provide voltage derating, enhancing reliability and extending operational lifetime. Derated operation reduces stress on the dielectric material. Circuit designs initially specified for 16 V operation are fully compatible with 25 V rated components.

Q: Why is EEU-EB1E221S recommended over other upgrade options? A: The EEU-EB1E221S (Panasonic) holds active product status, ensuring ongoing manufacturing support, current supply chain availability, and documented long-term production commitments. This contrasts with "Not For New Designs" status parts, which face potential discontinuation.

Q: Are there PCB layout considerations when substituting with taller capacitors? A: Height variations range from 0.413" (10.50 mm) to 0.512" (13.00 mm). Applications with height-constrained layouts should prioritize 25ML220MEFC8X9 (0.413" height) or EEU-EB1E221S height specifications. Standard radial through-hole mounting remains unchanged across all substitutes.

Q: How does ripple current rating affect substitution selection? A: Ripple current handling varies across substitutes: original at 240 mA (@ 120 Hz), UPW1C221MPD at 360.75 mA, and EEU-FM1E221 at 665 mA. Applications subject to AC ripple stress benefit from higher ripple current rated substitutes. All substitutes meet or exceed original ripple current specifications.

Q: What compliance considerations apply to these substitutes? A: All listed substitutes maintain ROHS3 compliance matching the original part. The UHE1E221MPD carries REACH Affected status, while EEU-EB1E221S and EEU-FM1E221 are REACH Unaffected. Environmental compliance requirements should be cross-referenced with specific application regulations.

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