SK29A M2G Equivalent & Substitute Parts

Part Overview

The SK29A M2G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90 V DC reverse voltage and 2 A average rectified current in a DO-214AC (SMA) surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for existing designs or production requirements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	90 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 90 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SK29A M2G is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 90 V
Current - Average Rectified (Io): Must equal or exceed 2 A
Technology: Schottky diode type
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Requirements:

Package / Case: DO-214AC (SMA) surface mount package
Mounting Type: Surface Mount

Regulatory & Environmental Requirements:

RoHS Status: ROHS3 Compliant preferred
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Operating Temperature Range: -55°C ~ 150°C minimum

Substitute parts identified in this reference maintain the 90 V reverse voltage rating and fast recovery Schottky technology. However, current ratings vary: parts rated at 1 A or 1.5 A represent reduced current capacity and are suitable only for applications where the circuit design accommodates lower current specifications. Parts in the DO-214AC (SMA) package maintain mechanical compatibility with the original design footprint.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Package	Reverse Leakage @ Vr	RoHS Status	Product Status
SK29A M2G	Taiwan Semiconductor Corporation	90 V	2 A	850 mV @ 2 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Discontinued
B190B-13	Diodes Incorporated	90 V	1 A	790 mV @ 1 A	DO-214AA (SMB)	500 µA @ 90 V	RoHS non-compliant	Discontinued
B190B-13-F	Diodes Incorporated	90 V	1 A	790 mV @ 1 A	DO-214AA (SMB)	500 µA @ 90 V	ROHS3 Compliant	Active
BYS11-90-E3/TR	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS11-90-E3/TR3	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS11-90-M3/TR	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS11-90-M3/TR3	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS12-90-E3/TR	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS12-90-E3/TR3	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS12-90-M3/TR	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active
BYS12-90-M3/TR3	Vishay General Semiconductor - Diodes Division	90 V	1.5 A	750 mV @ 1 A	DO-214AC (SMA)	100 µA @ 90 V	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitutes (Preferred):

The Vishay General Semiconductor BYS11 and BYS12 series parts (BYS11-90-E3/TR, BYS11-90-E3/TR3, BYS11-90-M3/TR, BYS11-90-M3/TR3, BYS12-90-E3/TR, BYS12-90-E3/TR3, BYS12-90-M3/TR, BYS12-90-M3/TR3) are the primary substitutes for the SK29A M2G. These parts maintain:

Identical 90 V reverse voltage rating
DO-214AC (SMA) package compatibility with original footprint
ROHS3 compliance
100 µA reverse leakage specification matching the original
Active product status with established supply availability
Operating temperature range of -55°C ~ 150°C

The current rating of 1.5 A on these parts is lower than the original 2 A specification. Selection of these parts is appropriate for applications where circuit design accommodates the reduced current capacity or where the 2 A rating was not fully utilized in the original design.

Secondary Substitutes (Limited Compatibility):

The Diodes Incorporated B190B-13-F represents an alternative with ROHS3 compliance and active product status. However, this part uses the DO-214AA (SMB) package, which differs from the original DO-214AC (SMA) package. Package substitution requires PCB layout modification and is not a direct footprint replacement. Additionally, the 1 A current rating is further reduced compared to the original 2 A specification.

The B190B-13 (non-tape & reel version) is discontinued and RoHS non-compliant, making it unsuitable for new designs or production requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the BYS11-90-E3/TR3 directly replace the SK29A M2G without PCB modification?

A: Yes. The BYS11-90-E3/TR3 uses the same DO-214AC (SMA) package as the SK29A M2G, enabling direct footprint compatibility without PCB layout changes. The 90 V reverse voltage rating and fast recovery Schottky technology are identical. The 1.5 A current rating is lower than the original 2 A specification; circuit design must accommodate this reduced capacity.

Q: What is the difference between BYS11 and BYS12 series parts?

A: Both BYS11 and BYS12 series maintain identical electrical specifications for the 90 V rating: 1.5 A current, 750 mV forward voltage at 1 A, and 100 µA reverse leakage. The designation difference reflects internal manufacturing or die variations within Vishay's product line. Both series are suitable substitutes with equivalent performance characteristics.

Q: Why do some part numbers include "TR" and others "TR3"?

A: The "TR" and "TR3" suffixes indicate different tape and reel packaging configurations for surface mount component handling and automated assembly. Both configurations contain identical diode specifications and are functionally equivalent. Selection between TR and TR3 depends on assembly equipment compatibility and supply chain requirements.

Q: Can the B190B-13-F be used as a substitute despite the different package?

A: The B190B-13-F uses the DO-214AA (SMB) package instead of the original DO-214AC (SMA) package. This package difference requires PCB footprint modification and is not a direct replacement. Additionally, the 1 A current rating is lower than the original 2 A specification. Use of this part requires design review and PCB layout changes.

Q: What is the significance of the 100 µA reverse leakage specification?

A: Reverse leakage current indicates the small current flowing through the diode when reverse biased. The SK29A M2G and Vishay BYS series parts specify 100 µA @ 90 V, while the Diodes B190B series specifies 500 µA @ 90 V. Lower reverse leakage is generally preferable in precision applications. The Vishay parts match the original specification exactly.

Q: Are all substitute parts ROHS3 compliant?

A: The Vishay BYS11 and BYS12 series parts are ROHS3 compliant. The Diodes B190B-13-F is ROHS3 compliant. The Diodes B190B-13 (non-F version) is RoHS non-compliant and unsuitable for applications requiring regulatory compliance. Verify compliance requirements for your specific application.

Q: What is the current availability status of substitute parts?

A: The Vishay BYS series parts (BYS11-90-E3/TR, BYS11-90-E3/TR3, BYS11-90-M3/TR, BYS11-90-M3/TR3, BYS12-90-E3/TR, BYS12-90-E3/TR3, BYS12-90-M3/TR, BYS12-90-M3/TR3) are active products with inventory quantities ranging from 750 to 30,300 pieces. The Diodes B190B-13-F is active with 74,200 pieces in stock. The original SK29A M2G and Diodes B190B-13 are discontinued.

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