SS22-M3/52T Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS22-M3/52T is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 20V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for higher voltage ratings or improved electrical characteristics. The substitute parts listed maintain the core electrical parameters while offering variations in manufacturer, product status, packaging format, or enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
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	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution logic for the SS22-M3/52T is based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Technology: Schottky diode
Voltage - DC Reverse (Vr) (Max): 20V minimum
Current - Average Rectified (Io): 2A minimum
Package / Case: DO-214AA or SMB compatible
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Substitution Categories:

Direct Parametric Equivalents (20V, 2A): Parts that match all primary electrical specifications and package requirements. These include B220-13-F, B220Q-13-F, and CMSH2-20 TR13 PBFREE. These parts are interchangeable in applications where the 20V rating is sufficient.

Upgrade Equivalent (Last Time Buy Status): SS22T3G from onsemi maintains identical electrical specifications (20V, 2A) but carries Last Time Buy product status, indicating discontinued production. This part is suitable for applications requiring extended component availability during transition periods.

Enhanced Performance Substitute (Higher Voltage Rating): STPS2L40U from STMicroelectronics provides a 40V DC reverse voltage rating with improved forward voltage characteristics (430 mV @ 2A versus 500 mV @ 2A) and lower reverse leakage current (220 µA @ 40V versus 400 µA @ 20V). This part is suitable for applications where higher voltage margin or improved efficiency is beneficial, though it exceeds the minimum 20V requirement.

Parameter Comparison

Parameter	SS22-M3/52T (Main)	SS22T3G	STPS2L40U	B220-13-F	B220Q-13-F	CMSH2-20 TR13 PBFREE
Manufacturer	Vishay	onsemi	STMicroelectronics	Diodes Inc.	Diodes Inc.	Central Semiconductor
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	40 V	20 V	20 V	20 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	500 mV @ 2 A	430 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	400 µA @ 20 V	400 µA @ 40 V	220 µA @ 40 V	500 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	150°C (Max)	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Product Status	Active	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

Select B220-13-F, B220Q-13-F, or CMSH2-20 TR13 PBFREE when the application requires exact electrical parameter matching to the SS22-M3/52T. All three parts maintain 20V reverse voltage, 2A current rating, and 500 mV forward voltage characteristics. B220Q-13-F includes AEC-Q101 automotive qualification, making it suitable for automotive applications. All substitute parts maintain Active product status and RoHS3 compliance.

For Extended Availability During Transition:

SS22T3G from onsemi provides identical electrical specifications but carries Last Time Buy status. This part is suitable for applications where component continuity is required during manufacturer transitions, though long-term availability is limited.

For Enhanced Performance Applications:

STPS2L40U from STMicroelectronics is selected when the application benefits from higher voltage margin (40V versus 20V) or improved efficiency characteristics. This part delivers lower forward voltage (430 mV @ 2A) and reduced reverse leakage current (220 µA @ 40V), resulting in lower power dissipation. STPS2L40U is suitable for designs where the 20V rating provides insufficient safety margin or where thermal performance is critical. This part maintains Active product status and RoHS3 compliance.

Compliance Considerations:

All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing and storage processes. REACH status is unaffected for all parts.

Frequently Asked Questions (FAQ)

Q: Can I use STPS2L40U as a direct replacement for SS22-M3/52T?

A: STPS2L40U is electrically compatible and functionally superior in applications where higher voltage rating is acceptable. The 40V reverse voltage rating exceeds the 20V requirement of SS22-M3/52T, and the improved forward voltage (430 mV versus 500 mV) reduces power dissipation. However, verify that the application circuit does not depend on the specific 20V voltage threshold. STPS2L40U is suitable for new designs and applications where enhanced performance is beneficial.

Q: What is the difference between B220-13-F and B220Q-13-F?

A: Both parts share identical electrical specifications (20V, 2A, 500 mV forward voltage). B220Q-13-F includes AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging. B220-13-F is supplied in Cut Tape & Digi-Reel® format. Select B220Q-13-F for automotive applications requiring AEC-Q101 certification. Select B220-13-F for general industrial applications where automotive qualification is not required.

Q: Why is SS22T3G listed as Last Time Buy?

A: SS22T3G from onsemi carries Last Time Buy status, indicating that the manufacturer has discontinued production and will no longer accept new orders after a specified date. This part maintains identical electrical specifications to SS22-M3/52T but should be selected only when extended component availability during transition periods is required. For new designs, select Active status parts such as B220-13-F, B220Q-13-F, CMSH2-20 TR13 PBFREE, or STPS2L40U.

Q: Are all substitute parts available in the same packaging format?

A: No. SS22-M3/52T and SS22T3G are supplied in Tape & Reel (TR) format. B220-13-F and STPS2L40U are supplied in Cut Tape (CT) & Digi-Reel® format. B220Q-13-F and CMSH2-20 TR13 PBFREE are supplied in Tape & Reel (TR) format. Verify packaging format compatibility with your assembly process before selection.

Q: What is the significance of the reverse leakage current differences among substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at elevated temperatures. SS22-M3/52T specifies 400 µA @ 20V. B220-13-F, B220Q-13-F, and CMSH2-20 TR13 PBFREE specify 500 µA @ 20V, representing a 25% increase in leakage. STPS2L40U specifies 220 µA @ 40V, representing significantly lower leakage. For applications sensitive to leakage current or operating at elevated temperatures, STPS2L40U provides superior performance.

Q: Can I use these parts interchangeably in existing designs?

A: Parts with identical electrical specifications (SS22-M3/52T, SS22T3G, B220-13-F, B220Q-13-F, CMSH2-20 TR13 PBFREE) are interchangeable in existing designs without circuit modification. STPS2L40U is compatible but provides enhanced performance characteristics. Verify package footprint compatibility with your PCB design, as all parts use DO-214AA (SMB) package with identical mechanical dimensions.

Q: What is the operating temperature range difference between SS22-M3/52T and SS22T3G?

A: SS22-M3/52T specifies -65°C to 150°C junction temperature range. SS22T3G specifies -55°C to 150°C, representing a 10°C reduction in minimum operating temperature. For applications requiring operation below -55°C, SS22-M3/52T or other parts with -65°C minimum rating are required.

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