SS22HE3_A/H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS22HE3_A/H is a 20V, 2A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AA (SMB) surface mount package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. Equivalent and substitute parts are necessary to address supply chain continuity, inventory availability, and design flexibility across manufacturing environments while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 20 V
Technology	Schottky	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS22HE3_A/H is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 20 V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Technology: Schottky
Operating Temperature Range: -55°C to 150°C

Allowable Variation Parameters:

Current - Average Rectified (Io): Equal or greater than 2A
Voltage - Forward (Vf) (Max) @ If: Equal or less than 500 mV
Current - Reverse Leakage @ Vr: Acceptable within design margins
RoHS and MSL compliance: ROHS3 Compliant, MSL 1

Substitute parts are classified into two categories:

Parametric Equivalents: Parts with identical electrical ratings (20V, 2A) and identical package specifications.

Manufacturer Recommended Substitutes: Parts with equal or superior current ratings (3A) while maintaining all other critical parameters, enabling direct replacement with enhanced performance margin.

Parameter Comparison

Parameter	SS22HE3_A/H (Vishay)	SK22_R1_00001 (Panjit)	SS22T3G (onsemi)	SK32B-LTP (Micro Commercial Co)
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V
Current - Average Rectified (Io)	2 A	2 A	2 A	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	400 µA @ 20 V	90 µA @ 20 V	400 µA @ 40 V	500 µA @ 20 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Technology	Schottky	Schottky	Schottky	Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Last Time Buy	Not For New Designs

Engineering Selection Recommendations

Primary Equivalent Selection: SK22_R1_00001 (Panjit International Inc.)

The SK22_R1_00001 is a parametric equivalent offering identical electrical specifications (20V, 2A) and package configuration (DO-214AA, SMB). This part maintains Active product status and carries full ROHS3 compliance with MSL 1 rating. The reverse leakage current of 90 µA at 20V is superior to the main part specification, providing enhanced performance characteristics. This part is suitable for direct replacement in new designs and ongoing production.

Secondary Equivalent Selection: SS22T3G (onsemi)

The SS22T3G provides parametric equivalence with identical voltage and current ratings (20V, 2A) in the same DO-214AA, SMB package. This part carries Last Time Buy status, indicating limited future availability. ROHS3 compliance and MSL 1 rating are maintained. The reverse leakage specification of 400 µA at 40V (measured at higher voltage) is acceptable within design margins. This part is suitable for replacement in existing designs where supply continuity is required.

Higher Current Alternative: SK32B-LTP (Micro Commercial Co)

The SK32B-LTP offers a 3A current rating while maintaining the 20V reverse voltage specification and DO-214AA, SMB package form factor. This part carries Not For New Designs status and is suitable only for replacement applications in existing designs. The elevated reverse leakage current of 500 µA at 20V and higher current rating provide design margin but should be evaluated for thermal and circuit performance implications.

Frequently Asked Questions (FAQ)

Q: Can SK22_R1_00001 be used as a direct replacement for SS22HE3_A/H?

A: Yes. The SK22_R1_00001 is a parametric equivalent with identical voltage (20V), current (2A), and package specifications (DO-214AA, SMB). Both parts maintain Active product status and full ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between SK22_R1_00001 and SS22T3G?

A: Both parts are parametric equivalents with identical electrical ratings (20V, 2A) and package configuration. The primary difference is product status: SK22_R1_00001 is Active, while SS22T3G is Last Time Buy. The reverse leakage current specifications differ slightly but both are within acceptable design margins.

Q: Can SK32B-LTP replace SS22HE3_A/H in all applications?

A: SK32B-LTP has a higher current rating (3A versus 2A) and is physically compatible (DO-214AA, SMB package). However, this part carries Not For New Designs status. The elevated reverse leakage current (500 µA at 20V) and higher current rating may affect thermal performance and circuit behavior. Evaluation is required for specific application requirements.

Q: Are all substitute parts automotive qualified?

A: The main part SS22HE3_A/H carries AEC-Q101 automotive qualification. The substitute parts provided do not explicitly list automotive qualification in their specifications. Automotive applications requiring AEC-Q101 certification should verify qualification status with the respective manufacturers.

Q: What is the significance of Product Status in part selection?

A: Product Status indicates lifecycle phase. Active parts are in full production and recommended for new designs. Last Time Buy parts have limited future availability. Not For New Designs parts are obsolete or discontinued and should be used only for replacement in existing designs. Selection should prioritize Active status for new designs.

Q: Are all parts RoHS3 compliant?

A: Yes. All listed parts (SS22HE3_A/H, SK22_R1_00001, SS22T3G, and SK32B-LTP) are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental requirements.

Q: What does MSL 1 (Unlimited) mean?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture control during storage or handling. These parts can be stored in standard industrial environments without desiccant packaging or controlled humidity conditions.

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