SH221M100ST Equivalent & Substitute Parts

Part Overview

The SH221M100ST is a 220 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing applications. The SH series has been superseded by active production alternatives that maintain electrical compatibility while offering improved performance characteristics such as extended lifetime ratings and broader operating temperature ranges.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	100 V
Tolerance	±20%
ESR @ 120 Hz	600 mOhm
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C to 105°C
Ripple Current @ 120 Hz	590 mA
Ripple Current @ 10 kHz	826 mA
Lead Spacing	0.295" (7.50 mm)
Diameter	0.630" (16.00 mm)
Height (Seated Max)	0.984" (25.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SH221M100ST is determined by the following critical parameters:

Primary Compatibility Criteria:

Capacitance: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 100 V minimum (equal or higher voltage acceptable)
Lead Spacing: 0.295" (7.50 mm) (exact match required)
Diameter: 0.630" (16.00 mm) (exact match required)
Height: 0.984" (25.00 mm) maximum (exact match or lower acceptable)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Secondary Performance Criteria:

ESR, lifetime rating, ripple current, and operating temperature range may vary
Higher voltage ratings provide design margin
Extended lifetime ratings improve reliability
Broader operating temperature ranges increase application flexibility

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (100 V Rating) Parts maintaining the original 100 V voltage specification with identical or superior performance characteristics.

Category 2: Upgraded Voltage Variants (160 V Rating) Parts with elevated voltage ratings that provide enhanced design margin while maintaining all other critical parameters.

Parameter Comparison

Parameter	SH221M100ST	SEK221M100ST	EEU-FC2A221	EKXG161ELL221ML25S	UPW2A221MHD	UCS2C221MHD
Manufacturer	CDE	CDE	Panasonic	Chemi-Con	Nichicon	Nichicon
Capacitance	220 µF	220 µF	220 µF	220 µF	220 µF	220 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Voltage Rating	100 V	100 V	100 V	160 V	100 V	160 V
ESR @ 120 Hz	600 mOhm	600 mOhm	Not specified	Not specified	Not specified	Not specified
Lifetime @ 105°C	2000 Hrs	2000 Hrs	5000 Hrs	10000 Hrs	8000 Hrs	10000 Hrs
Operating Temperature	-40°C to 105°C	-55°C to 105°C	-55°C to 105°C	-40°C to 105°C	-55°C to 105°C	-40°C to 105°C
Ripple Current @ 120 Hz	590 mA	Not specified	760.5 mA	1.02 A	578.5 mA	1.185 A
Ripple Current @ 100 kHz	Not specified	Not specified	1.08 A	2.295 A	890 mA	2.37 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)	0.295" (7.50 mm)
Diameter	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)
Height (Seated Max)	0.984" (25.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	1.043" (26.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SEK221M100ST (Cornell Dubilier Electronics)

The SEK221M100ST represents the direct successor within the CDE product line. It maintains identical electrical specifications (220 µF, ±20%, 100 V, 600 mOhm ESR, 2000 Hrs @ 105°C) while extending the operating temperature range to -55°C to 105°C. Product status is Active, ensuring long-term availability. This part is suitable for applications requiring continuity with the original CDE SH series design.

EEU-FC2A221 (Panasonic Electronic Components)

The EEU-FC2A221 provides a 100 V equivalent with significantly extended lifetime (5000 Hrs @ 105°C). Operating temperature range extends to -55°C to 105°C. This part carries AEC-Q200 automotive qualification and is rated for automotive applications. Product status is Active with high inventory availability (16,955 pcs). Ripple current performance is enhanced (760.5 mA @ 120 Hz, 1.08 A @ 100 kHz). Suitable for applications requiring automotive-grade reliability.

EKXG161ELL221ML25S (Chemi-Con)

The EKXG161ELL221ML25S offers upgraded voltage rating (160 V) with extended lifetime (10,000 Hrs @ 105°C). Physical dimensions are identical except height remains within specification at 0.984" (25.00 mm). Ripple current capability is substantially higher (1.02 A @ 120 Hz, 2.295 A @ 100 kHz). Product status is Active. The elevated voltage rating provides design margin for applications subject to voltage transients or requiring enhanced reliability margins.

UPW2A221MHD (Nichicon)

The UPW2A221MHD maintains 100 V rating with extended lifetime (8000 Hrs @ 105°C) and operating temperature range of -55°C to 105°C. Ripple current performance is comparable to the original (578.5 mA @ 120 Hz, 890 mA @ 100 kHz). Product status is Not For New Designs, indicating this part is suitable for legacy system support and replacement applications but not recommended for new product development.

UCS2C221MHD (Nichicon)

The UCS2C221MHD provides upgraded voltage rating (160 V) with extended lifetime (10,000 Hrs @ 105°C). Physical height is 1.043" (26.50 mm), exceeding the original specification by 0.059" (1.50 mm). Ripple current capability is substantially higher (1.185 A @ 120 Hz, 2.37 A @ 100 kHz). Product status is Active. Height increase must be verified against PCB layout constraints before selection.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating than the original SH221M100ST?

A: Yes. A higher voltage rating (160 V) is electrically compatible with a 100 V application. The capacitor will operate safely at lower voltage stress, providing design margin. Physical dimensions must remain compatible with the PCB layout.

Q: What is the significance of the extended lifetime ratings in substitute parts?

A: Lifetime rating indicates the number of hours a capacitor maintains its specified performance at maximum rated temperature (105°C). Extended ratings (5000, 8000, or 10,000 Hrs) indicate improved reliability and longer service life compared to the original 2000 Hrs specification. Selection depends on application reliability requirements and expected operating conditions.

Q: Are all substitute parts physically interchangeable with the SH221M100ST?

A: Physical interchangeability requires matching lead spacing (0.295" / 7.50 mm), diameter (0.630" / 16.00 mm), and height (0.984" / 25.00 mm maximum). The UCS2C221MHD has a height of 1.043" (26.50 mm), which exceeds the original specification by 1.50 mm. PCB layout must be verified before substitution.

Q: What does "Product Status: Not For New Designs" mean for the UPW2A221MHD?

A: This designation indicates the part is available for replacement and legacy applications but is not recommended for incorporation into new product designs. Manufacturers typically apply this status to parts approaching end-of-life. For new designs, select parts with Active status such as SEK221M100ST, EEU-FC2A221, EKXG161ELL221ML25S, or UCS2C221MHD.

Q: How do I determine which substitute part is best for my application?

A: Selection criteria include: (1) Product Status—Active parts ensure long-term availability; (2) Voltage Rating—higher ratings provide design margin; (3) Lifetime Rating—extended ratings improve reliability; (4) Operating Temperature Range—broader ranges accommodate environmental extremes; (5) Physical Dimensions—must fit PCB layout constraints; (6) Ripple Current—higher ratings support higher current applications; (7) Certifications—AEC-Q200 qualification for automotive applications.

Q: Is the SEK221M100ST a direct replacement for the SH221M100ST?

A: Yes. The SEK221M100ST is the direct CDE successor with identical electrical specifications (220 µF, ±20%, 100 V, 600 mOhm ESR, 2000 Hrs @ 105°C) and physical dimensions. It extends the operating temperature range to -55°C to 105°C and maintains Active product status, ensuring availability and compatibility.

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

A: ESR (Equivalent Series Resistance) is measured at a specific frequency (120 Hz in the original specification). Impedance is a broader measure of total opposition to AC current flow, typically measured at higher frequencies (100 kHz). Both parameters affect capacitor performance in ripple current and filtering applications. Lower values indicate better high-frequency performance.

Q: Can I substitute the SH221M100ST with a part rated for automotive applications?

A: Yes, if the application requirements align with automotive specifications. The EEU-FC2A221 carries AEC-Q200 automotive qualification and is electrically compatible. Automotive-qualified parts undergo additional testing and reliability screening, making them suitable for demanding environments. Verify that other application requirements (temperature range, ripple current, lifetime) are met.

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