SS22HR5G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS22HR5G is a 20V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in the DO-214AA (SMB) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing production and repair applications. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant, making it suitable for automotive and industrial applications requiring fast recovery rectification.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	400 µA @ 20 V
Package / Case	DO-214AA, SMB
Operating Temperature - Junction	-55°C ~ 125°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS22HR5G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V (exact match required)
Current - Average Rectified (Io): 2 A (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Technology: Schottky (exact match required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Secondary Compatibility Factors:

Operating Temperature Range: Must encompass or exceed -55°C to 125°C
Voltage - Forward (Vf) (Max) @ If: Acceptable within 500 mV @ 2 A specification
Current - Reverse Leakage @ Vr: Acceptable within 400 µA @ 20 V specification
RoHS Compliance: RoHS3 compliant preferred for regulatory alignment
Automotive Grade / AEC-Q101: Preferred for applications requiring automotive qualification

Parts are grouped into three categories:

Direct Equivalents: Identical electrical specifications and packaging with same or compatible manufacturer base part numbers.

Parametric Equivalents: Matching all critical electrical parameters and package specifications, with minor variations in secondary characteristics such as forward voltage or reverse leakage within acceptable tolerances.

Similar Parts: Meeting core voltage, current, and package requirements but with variations in temperature range, compliance status, or secondary electrical characteristics that may require application-level verification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Temp Range	Grade	AEC-Q101	RoHS	Product Status
SS22HR5G	Taiwan Semiconductor Corporation	20 V	2 A	500 mV @ 2 A	DO-214AA, SMB	-55°C ~ 125°C	Automotive	Yes	RoHS3	Discontinued
SS22 R5G	Taiwan Semiconductor Corporation	20 V	2 A	500 mV @ 2 A	DO-214AA, SMB	-55°C ~ 125°C	Not specified	Not specified	RoHS3	Discontinued
SL22HE3_A/H	Vishay General Semiconductor - Diodes Division	20 V	2 A	395 mV @ 1 A	DO-214AA, SMB	-55°C ~ 125°C	Automotive	Yes	RoHS3	Active
SL22HE3_A/I	Vishay General Semiconductor - Diodes Division	20 V	2 A	395 mV @ 1 A	DO-214AA, SMB	-55°C ~ 125°C	Automotive	Yes	RoHS3	Active
5817SMJ/TR13	Microchip Technology	20 V	1 A	450 mV @ 1 A	DO-214AA, SMB	-55°C ~ 150°C	Not specified	Not specified	Non-compliant	Active
B220-13-F	Diodes Incorporated	20 V	2 A	500 mV @ 2 A	DO-214AA, SMB	-65°C ~ 150°C	Not specified	Not specified	RoHS3	Active
B220A-13-F	Diodes Incorporated	20 V	2 A	500 mV @ 2 A	DO-214AC, SMA	-65°C ~ 150°C	Not specified	Not specified	RoHS3	Active
B220Q-13-F	Diodes Incorporated	20 V	2 A	500 mV @ 2 A	DO-214AA, SMB	-65°C ~ 150°C	Automotive	Yes	RoHS3	Active
CMSH1-20 BK PBFREE	Central Semiconductor Corp	20 V	1 A	550 mV @ 1 A	DO-214AA, SMB	-65°C ~ 150°C	Not specified	Not specified	RoHS3	Active
SK12-LTP	Micro Commercial Co	20 V	1 A	500 mV @ 1 A	DO-214AA, SMB	-55°C ~ 125°C	Not specified	Not specified	RoHS3	Not For New Designs
SK12E3/TR13	Microsemi Corporation	20 V	1 A	450 mV @ 1 A	DO-214AA, SMB	-65°C ~ 175°C	Not specified	Not specified	RoHS3	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The SL22HE3_A/H and SL22HE3_A/I manufactured by Vishay General Semiconductor - Diodes Division are the recommended primary substitutes for the SS22HR5G. Both parts maintain identical voltage (20 V), current (2 A), and package specifications (DO-214AA, SMB). Both carry automotive-grade qualification and AEC-Q101 certification, matching the original part's compliance profile. Both are RoHS3 compliant and currently in active production status. The forward voltage specification of 395 mV @ 1 A is superior to the original 500 mV @ 2 A specification, providing improved efficiency characteristics. Operating temperature range (-55°C ~ 125°C) is identical to the original part.

Secondary Equivalent (Automotive-Qualified Alternative):

The B220Q-13-F manufactured by Diodes Incorporated provides a 2 A rated current matching the original specification with identical 20 V reverse voltage and DO-214AA, SMB package. This part carries automotive-grade qualification and AEC-Q101 certification. It is RoHS3 compliant and in active production. The operating temperature range extends to -65°C ~ 150°C, exceeding the original specification. Forward voltage specification (500 mV @ 2 A) matches the original part exactly.

Parametric Equivalents (Current-Reduced Alternatives):

Parts rated for 1 A current (5817SMJ/TR13, CMSH1-20 BK PBFREE, SK12-LTP, SK12E3/TR13) maintain the 20 V reverse voltage and DO-214AA, SMB package but are rated for half the current capacity. These parts are suitable only for applications where the actual circuit current requirement does not exceed 1 A. The 5817SMJ/TR13 is RoHS non-compliant and should not be selected for new designs requiring RoHS compliance. The SK12-LTP carries a "Not For New Designs" status and should be avoided for new applications.

Package Incompatibility:

The B220A-13-F uses a DO-214AC (SMA) package, which is mechanically and electrically incompatible with the DO-214AA (SMB) package of the original part. This part is not suitable as a direct substitute without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the SL22HE3_A/H or SL22HE3_A/I be used as direct replacements for the SS22HR5G?

A: Yes. Both Vishay parts are direct equivalents meeting all critical electrical parameters: 20 V reverse voltage, 2 A average rectified current, DO-214AA SMB package, and fast recovery Schottky technology. Both carry automotive-grade qualification and AEC-Q101 certification. The forward voltage is actually superior at 395 mV @ 1 A compared to the original 500 mV @ 2 A. Both are in active production and RoHS3 compliant.

Q: What is the difference between SS22 R5G and SS22HR5G?

A: SS22 R5G is a parametric equivalent with identical electrical specifications (20 V, 2 A, 500 mV @ 2 A forward voltage) and packaging (DO-214AA, SMB). The primary difference is packaging format: SS22 R5G is supplied in Cut Tape (CT) format while SS22HR5G packaging format is not specified. Both are discontinued at DiGi Electronics.

Q: Why are 1 A rated parts listed as substitutes when the original is 2 A?

A: Parts such as CMSH1-20 BK PBFREE, SK12-LTP, and SK12E3/TR13 are listed as similar alternatives, not direct substitutes. These 1 A parts are suitable only for applications where actual circuit current does not exceed 1 A. Using a 1 A rated part in a 2 A application will result in component failure. These parts are included for reference in applications requiring reduced current capacity.

Q: Is the B220-13-F a suitable substitute?

A: The B220-13-F is a suitable substitute for applications not requiring automotive qualification. It matches the 20 V, 2 A, and DO-214AA SMB package specifications with identical 500 mV @ 2 A forward voltage. However, it does not carry automotive-grade qualification or AEC-Q101 certification. For automotive applications, the B220Q-13-F is the appropriate Diodes Incorporated alternative, as it includes AEC-Q101 qualification.

Q: What is the significance of the DO-214AA versus DO-214AC package designation?

A: DO-214AA (SMB) and DO-214AC (SMA) are distinct surface mount packages with different physical dimensions and PCB footprints. The B220A-13-F uses DO-214AC (SMA) packaging and cannot be mounted on a PCB designed for DO-214AA (SMB) components without redesign. The original SS22HR5G requires DO-214AA (SMB) package compatibility.

Q: Are all listed substitutes RoHS3 compliant?

A: No. The 5817SMJ/TR13 manufactured by Microchip Technology is RoHS non-compliant and should not be selected for applications requiring RoHS compliance. All other listed parts are RoHS3 compliant.

Q: What does "Not For New Designs" status mean for the SK12-LTP?

A: "Not For New Designs" indicates that the manufacturer (Micro Commercial Co) has designated this part as obsolete or end-of-life for new applications. While inventory may be available, this part should not be selected for new product designs. The SK12E3/TR13 from Microsemi Corporation is the preferred alternative if a 1 A rated part is required.

Q: Can the B220Q-13-F replace the SS22HR5G in automotive applications?

A: Yes. The B220Q-13-F is suitable for automotive applications requiring the SS22HR5G. It carries automotive-grade qualification and AEC-Q101 certification, matching the original part's compliance requirements. It maintains 20 V reverse voltage, 2 A current rating, and DO-214AA SMB package specifications. The extended operating temperature range (-65°C ~ 150°C) exceeds the original specification.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging formats?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for automated assembly processes. Cut Tape (CT) packaging supplies components on tape segments cut to specific lengths, suitable for manual assembly or smaller production runs. Both formats contain identical components; the difference is in supply format and handling method.

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