SH221M016ST Equivalent & Substitute Parts Reference

Part Overview

The SH221M016ST is a 220 µF, 16 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 2000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Identification of equivalent and substitute parts is necessary due to the obsolete status of the SH221M016ST. Active production alternatives from major manufacturers provide improved availability, extended product lifecycles, and compliance with current industry standards while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	220	µF	Critical - must match exactly
Voltage Rating	16	V	Critical - minimum requirement
Tolerance	±20%	%	Critical - must match or be tighter
ESR @ 120 Hz	1.09	Ohm	Important - affects ripple current handling
Lifetime @ 105°C	2000	Hours	Important - minimum reliability requirement
Operating Temperature Range	-40 to 105	°C	Important - application environment
Lead Spacing	3.50	mm	Critical - PCB layout compatibility
Package Diameter	8.00	mm	Critical - physical fit
Package Height	11.50	mm	Critical - clearance requirement
Mounting Type	Through Hole	-	Critical - assembly method
Package Type	Radial, Can	-	Critical - form factor

Substitute Part Grouping Explanation

Substitute parts for the SH221M016ST are grouped based on strict electrical and mechanical compatibility criteria. The substitution logic follows these parameters:

Primary Substitution Criteria (Must Match):

Capacitance: 220 µF (exact match required)
Lead Spacing: 0.138" (3.50 mm) (exact match required)
Package Diameter: 0.315" (8.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Secondary Substitution Criteria (Equal or Better):

Voltage Rating: 16 V minimum (equal or higher acceptable)
Tolerance: ±20% (equal or tighter acceptable)
Lifetime @ 105°C: 2000 hours minimum (equal or longer acceptable)
Operating Temperature Range: Must encompass -40°C to 105°C

Grouping Categories:

Group 1 - Direct Equivalent (16V Rating):

SEK221M016ST (CDE) - Same voltage, active status, improved availability
EEU-FC1C221 (Panasonic) - Same voltage, automotive-grade, active status
UPW1C221MPD (Nichicon) - Same voltage, extended lifetime (3000 hrs)

Group 2 - Voltage Upgrade (25V Rating):

EEU-EB1E221S (Panasonic) - Higher voltage rating, extended lifetime (5000 hrs)
EEU-FC1E221 (Panasonic) - Higher voltage rating, automotive-grade
UHE1E221MPD (Nichicon) - Higher voltage rating, extended lifetime (7000 hrs)
UPS1E221MPD (Nichicon) - Higher voltage rating, active availability
UPW1E221MPD (Nichicon) - Higher voltage rating, extended lifetime (3000 hrs)

Voltage upgrades are acceptable substitutes because higher-rated capacitors operate safely at lower voltages while providing additional design margin and reliability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR/Impedance	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Product Status	Lead Spacing (mm)	Height (mm)
SH221M016ST	CDE	220	16	±20	1.09 Ω @ 120Hz	2000	-40 to 105	Obsolete	3.50	11.50
SEK221M016ST	CDE	220	16	±20	1.09 Ω	2000	-55 to 105	Active	3.50	11.50
EEU-FC1C221	Panasonic	220	16	±20	117 mΩ	2000	-55 to 105	Active	3.50	11.50
UPW1C221MPD	Nichicon	220	16	±20	117 mΩ	3000	-55 to 105	Not For New Designs	3.50	11.50
EEU-EB1E221S	Panasonic	220	25	±20	—	5000	-40 to 105	Active	3.50	12.50
EEU-FC1E221	Panasonic	220	25	±20	117 mΩ	2000	-55 to 105	Active	3.50	11.50
UHE1E221MPD	Nichicon	220	25	±20	130 mΩ	7000	-40 to 105	Not For New Designs	3.50	11.50
UPS1E221MPD	Nichicon	220	25	±20	280 mΩ	2000	-55 to 105	Not For New Designs	3.50	11.50
UPW1E221MPD	Nichicon	220	25	±20	117 mΩ	3000	-55 to 105	Not For New Designs	3.50	11.50

Engineering Selection Recommendations

For Direct Replacement (Same 16V Rating):

SEK221M016ST is the primary recommended substitute. Manufactured by the same supplier (CDE), this part maintains identical electrical specifications while offering active product status and extended availability. The operating temperature range extends to -55°C, providing improved low-temperature performance compared to the original SH221M016ST.

EEU-FC1C221 (Panasonic) provides an alternative from a major manufacturer with active status. This part includes AEC-Q200 automotive qualification, indicating enhanced reliability screening and documentation. The impedance specification (117 mΩ) is superior to the original part's ESR (1.09 Ω), resulting in better high-frequency ripple current handling.

UPW1C221MPD (Nichicon) offers extended lifetime (3000 hours at 105°C versus 2000 hours), providing improved reliability margin. However, this part carries "Not For New Designs" status, limiting its suitability for new product development.

For Voltage-Upgraded Substitution (25V Rating):

EEU-FC1E221 (Panasonic) is recommended for applications where voltage margin enhancement is beneficial. Active product status, AEC-Q200 qualification, and automotive-grade reliability support long-term availability and performance consistency. Physical dimensions remain compatible with the original part.

EEU-EB1E221S (Panasonic) provides the longest lifetime rating (5000 hours at 105°C) among all substitutes, suitable for applications requiring maximum reliability. Height increases to 12.50 mm; verify PCB clearance before selection.

UHE1E221MPD (Nichicon) offers exceptional lifetime (7000 hours at 105°C) but carries "Not For New Designs" status and REACH-affected classification, limiting applicability for new product development.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification consistent with the original part. Panasonic FC-series parts include AEC-Q200 automotive qualification, appropriate for automotive and industrial applications requiring enhanced reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can the SH221M016ST be replaced with a 25V-rated capacitor?

A: Yes. A 25V-rated capacitor operates safely at 16V application voltage. The higher voltage rating provides additional design margin and typically extends component lifetime. Physical dimensions must remain compatible with PCB layout. Verify height clearance when selecting 25V alternatives, as some variants have increased height (12.50 mm versus 11.50 mm).

Q: What is the difference between ESR and impedance specifications?

A: ESR (Equivalent Series Resistance) and impedance are related but distinct parameters. ESR is typically measured at a specific frequency (120 Hz in this case). Impedance represents the total opposition to current flow at a given frequency and includes both resistive and reactive components. Lower impedance values indicate better high-frequency ripple current performance. Substitutes with impedance specifications (measured in milliohms) generally provide superior performance compared to ESR-only specifications.

Q: Why do some substitute parts show "Not For New Designs" status?

A: "Not For New Designs" indicates the manufacturer is transitioning away from that product line. While these parts remain available and functional, they are not recommended for new product development due to uncertain long-term availability and potential discontinuation. For new designs, select parts with "Active" status.

Q: Are Panasonic and Nichicon substitutes interchangeable with the CDE original?

A: Electrical and mechanical parameters are interchangeable when specifications match. All recommended substitutes maintain identical capacitance (220 µF), tolerance (±20%), lead spacing (3.50 mm), package diameter (8.00 mm), and mounting type (through-hole radial). Verify operating temperature range and lifetime requirements for your specific application before final selection.

Q: What is the significance of AEC-Q200 qualification on Panasonic parts?

A: AEC-Q200 is an automotive industry standard qualification indicating the component has undergone enhanced reliability testing and documentation. This qualification is relevant for automotive, industrial, and mission-critical applications where reliability documentation and traceability are required. Non-automotive applications do not require this qualification.

Q: Can I use a substitute with higher lifetime rating (e.g., 5000 or 7000 hours) in place of the 2000-hour original?

A: Yes. Higher lifetime ratings indicate extended operational capability at rated temperature and voltage. This substitution improves reliability margin and is appropriate for all applications. No design changes are required.

Q: What is the impact of different impedance values on circuit performance?

A: Lower impedance (measured in milliohms) improves high-frequency ripple current handling and reduces voltage ripple across the capacitor. Substitutes with 117 mΩ impedance (EEU-FC1C221, EEU-FC1E221, UPW1C221MPD, UPW1E221MPD) provide superior performance compared to the original 1.09 Ω ESR specification. This improvement is beneficial for power supply filtering and noise reduction applications.

Q: Is the extended operating temperature range (-55°C to 105°C) on some substitutes beneficial?

A: Extended low-temperature capability (-55°C versus -40°C) provides improved performance in cold environments and expands application scope. This enhancement is beneficial for industrial, aerospace, and outdoor applications. Standard applications operating within -40°C to 105°C range experience no functional difference.

Q: How do I verify physical compatibility before ordering a substitute?

A: Confirm the following dimensions match your PCB layout: lead spacing (3.50 mm), package diameter (8.00 mm), and seated height (11.50 mm for most substitutes; 12.50 mm for EEU-EB1E221S). Verify mounting hole spacing on your PCB matches the 3.50 mm lead spacing. Check vertical clearance above the capacitor for the specified height.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message