SH221M050ST Equivalent & Substitute Parts Reference

Part Overview

The SH221M050ST is a 220 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating that the original manufacturer has discontinued production. The SH series represents an older generation of general-purpose aluminum electrolytic capacitors with a rated lifetime of 2000 hours at 105°C.

Due to its obsolete status, sourcing original SH221M050ST units presents supply chain challenges. Equivalent and substitute parts from active manufacturers provide functional alternatives that maintain the same electrical specifications while offering improved availability and, in many cases, enhanced performance characteristics such as extended operational lifetime and lower equivalent series resistance.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Voltage - Rated	50	V
Tolerance	±20%	—
ESR (Equivalent Series Resistance)	720	mOhm @ 120Hz
Lifetime @ Temperature	2000	Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C	—
Polarization	Polar	—
Lead Spacing	0.197" (5.00mm)	—
Size / Dimension	0.394" Dia (10.00mm)	—
Height - Seated (Max)	0.630" (16.00mm)	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SH221M050ST is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 220 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.197" (5.00mm) (exact match required)
Size / Dimension: 0.394" Dia (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Allowable Variation Parameters:

Height - Seated (Max): Substitute parts may exceed the original 0.630" (16.00mm) specification, provided the increased height does not conflict with board layout constraints
Operating Temperature Range: Substitute parts may offer extended lower temperature limits (e.g., -55°C vs. -40°C), which represents an enhancement
Lifetime @ Temperature: Substitute parts with extended lifetime (5000 Hrs, 7000 Hrs, 10000 Hrs @ 105°C) represent performance improvements over the original 2000 Hrs specification
ESR (Equivalent Series Resistance): Lower ESR values in substitute parts represent performance improvements
Ripple Current Ratings: Higher ripple current capacity in substitute parts represents performance enhancement

All substitute parts listed maintain ROHS3 compliance and are suitable for general-purpose applications identical to the original SH221M050ST.

Parameter Comparison

Parameter	SH221M050ST (Original)	SEK221M050ST	EEU-EB1H221	EKZE500ELL221MJ16S	UHE1H221MPD	UPW1H221MPD
Manufacturer	CDE	CDE	Panasonic	Chemi-Con	Nichicon	Nichicon
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Not For New Designs
Capacitance	220 µF	220 µF	220 µF	220 µF	220 µF	220 µF
Voltage - Rated	50 V	50 V	50 V	50 V	50 V	50 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
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
Lifetime @ 105°C	2000 Hrs	2000 Hrs	10000 Hrs	4000 Hrs	7000 Hrs	5000 Hrs
ESR @ 120Hz	720 mOhm	720 mOhm	—	—	—	—
Lead Spacing	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)
Size / Dimension	0.394" Dia (10.00mm)	0.394" Dia (10.00mm)	0.394" Dia (10.00mm)	0.394" Dia (10.00mm)	0.394" Dia (10.00mm)	0.394" Dia (10.00mm)
Height - Seated (Max)	0.630" (16.00mm)	0.630" (16.00mm)	0.669" (17.00mm)	0.689" (17.50mm)	0.630" (16.00mm)	0.630" (16.00mm)
Mounting Type	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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For New Designs and Active Production:

The EEU-EB1H221 (Panasonic) is the recommended primary substitute. This part is in active production status, offers the highest rated lifetime of 10000 hours at 105°C, and maintains full ROHS3 compliance with REACH Unaffected status. The increased height of 0.669" (17.00mm) versus the original 0.630" (16.00mm) represents a 0.039" (1.00mm) increase and must be evaluated against board layout constraints.

The EKZE500ELL221MJ16S (Chemi-Con) provides an alternative from an active manufacturer with a 4000-hour lifetime rating at 105°C. This part exhibits the lowest impedance at 42 mOhms and the highest ripple current capacity at 1.37 A @ 100 kHz, making it suitable for applications requiring enhanced high-frequency performance. The height of 0.689" (17.50mm) represents a 0.059" (1.50mm) increase from the original specification.

For Existing Inventory or Legacy System Maintenance:

The SEK221M050ST (Cornell Dubilier Electronics) maintains identical electrical specifications to the original SH221M050ST, including the same 720 mOhm ESR and 2000-hour lifetime rating. This part is in active production and offers the closest functional match with no height increase. It is suitable for direct replacement in existing designs where performance characteristics are already validated.

Parts Not Recommended for New Designs:

The UHE1H221MPD and UPW1H221MPD (both Nichicon) carry "Not For New Designs" status. While these parts offer acceptable performance with 7000-hour and 5000-hour lifetime ratings respectively, their discontinued design status makes them unsuitable for new product development. These parts may be considered only for legacy system maintenance where supply chain continuity is critical.

Frequently Asked Questions (FAQ)

Q: Can the SH221M050ST be directly replaced with any of these substitute parts?

A: Yes, all listed substitute parts are electrically and mechanically compatible with the SH221M050ST. All maintain the same 220 µF capacitance, 50 V voltage rating, ±20% tolerance, 5.00mm lead spacing, 10.00mm diameter, and through-hole radial can package. Direct substitution is possible provided that the increased height of some alternatives (EEU-EB1H221 at 17.00mm and EKZE500ELL221MJ16S at 17.50mm) does not conflict with board layout constraints.

Q: What is the primary advantage of substituting the obsolete SH221M050ST?

A: The original SH221M050ST is obsolete, meaning Cornell Dubilier Electronics no longer manufactures this part. Substitution ensures continued supply chain access through active manufacturers. Additionally, modern substitute parts offer extended operational lifetime (up to 10000 hours at 105°C versus 2000 hours), improved reliability, and enhanced ripple current handling capabilities.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant. The original SH221M050ST is also ROHS3 compliant. This ensures compatibility with environmental regulations and procurement requirements across all listed alternatives.

Q: What is the difference between the SEK221M050ST and the EEU-EB1H221?

A: Both are functionally equivalent to the SH221M050ST in terms of capacitance, voltage, tolerance, and lead spacing. The SEK221M050ST (CDE) maintains identical electrical specifications including 720 mOhm ESR and 2000-hour lifetime, offering the closest match to the original. The EEU-EB1H221 (Panasonic) offers superior performance with a 10000-hour lifetime rating but has a slightly increased height of 17.00mm versus 16.00mm. Selection depends on whether exact dimensional matching or enhanced lifetime performance is prioritized.

Q: Can I use the EKZE500ELL221MJ16S in high-ripple-current applications?

A: Yes. The EKZE500ELL221MJ16S demonstrates the highest ripple current capacity among all listed substitutes at 1.37 A @ 100 kHz, compared to the original SH221M050ST at 980 mA @ 10 kHz. This part is suitable for applications requiring enhanced high-frequency ripple current handling. However, its height of 17.50mm must be verified against board layout constraints.

Q: Why are UHE1H221MPD and UPW1H221MPD marked as "Not For New Designs"?

A: These Nichicon parts carry "Not For New Designs" status, indicating that the manufacturer has discontinued these product lines for new applications. While these parts remain available and functional, they are intended only for legacy system maintenance and repair. For new product development, the active-status alternatives (SEK221M050ST, EEU-EB1H221, or EKZE500ELL221MJ16S) are recommended.

Q: What is the significance of the operating temperature range difference between -40°C and -55°C?

A: The SEK221M050ST and UPW1H221MPD offer an extended lower operating temperature limit of -55°C compared to the original SH221M050ST at -40°C. This represents an enhancement for applications requiring operation in cold environments. For standard applications operating within -40°C to 105°C, this difference is not significant.

Q: Are there any REACH compliance considerations?

A: The EEU-EB1H221 and EKZE500ELL221MJ16S are listed as "REACH Unaffected," indicating full compliance with REACH regulations. The UHE1H221MPD is listed as "REACH Affected," which may require additional documentation for certain applications. The SEK221M050ST and UPW1H221MPD do not specify REACH status in the provided data. For applications requiring explicit REACH compliance documentation, the EEU-EB1H221 or EKZE500ELL221MJ16S are recommended.

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