SS19 M2G Schottky Diode 90V 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The SS19 M2G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 90V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating package form factor variations in surface mount applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	90	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 90 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Mandatory Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): 90V minimum
Current - Average Rectified (Io): 1A minimum
Technology: Schottky rectifier
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Package Compatibility:

Surface mount technology required
DO-214AC (SMA), DO-214BA, or DO-214AA (SMB) packages acceptable for PCB layout accommodation

Compliance Requirements:

RoHS3 compliance preferred for regulatory alignment
Operating temperature range: -55°C to 150°C minimum

Substitute parts are grouped into two categories:

Category 1 - Direct Package Match (DO-214AC/SMA): Parts maintaining identical package form factor with equivalent or superior electrical ratings.

Category 2 - Alternative Package Match (DO-214BA/SMB): Parts with different surface mount packages but equivalent electrical specifications, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Package	Tj Range [°C]	RoHS Status	Product Status
SS19 M2G	Taiwan Semiconductor Corporation	90	1	800	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Discontinued
HSM190JE3/TR13	Microchip Technology	90	1	840	DO-214BA	-55 to 175	ROHS3 Compliant	Active
B190B-13	Diodes Incorporated	90	1	790	DO-214AA (SMB)	-65 to 150	RoHS Non-Compliant	Discontinued
B190B-13-F	Diodes Incorporated	90	1	790	DO-214AA (SMB)	-65 to 150	ROHS3 Compliant	Active
BYS11-90-E3/TR	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS11-90-E3/TR3	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS11-90-M3/TR	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS11-90-M3/TR3	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS12-90-E3/TR	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS12-90-E3/TR3	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active
BYS12-90-M3/TR	Vishay General Semiconductor - Diodes Division	90	1.5	750	DO-214AC (SMA)	-55 to 150	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Package Substitutes (DO-214AC/SMA):

The Vishay General Semiconductor BYS11 and BYS12 series diodes (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) provide direct package compatibility with the SS19 M2G. These parts maintain the DO-214AC (SMA) form factor, identical 90V reverse voltage rating, and superior current handling at 1.5A. All variants are ROHS3 compliant and active in production. Forward voltage is reduced to 750 mV at 1A, providing improved efficiency. Operating temperature range matches the original specification at -55°C to 150°C.

Secondary Recommendation - Alternative Package Substitute (DO-214BA):

The Microchip Technology HSM190JE3/TR13 offers 90V/1A electrical equivalence with extended junction temperature range to 175°C. The DO-214BA package requires PCB layout modification but maintains surface mount compatibility. This part is ROHS3 compliant and active in production. Forward voltage specification is 840 mV at 1A, marginally higher than the original part.

Tertiary Recommendation - Alternative Package Substitute (DO-214AA/SMB):

The Diodes Incorporated B190B-13-F provides 90V/1A electrical equivalence in a DO-214AA (SMB) package. This part is ROHS3 compliant and active in production with high inventory availability (74,200 units). Forward voltage is 790 mV at 1A. Extended operating temperature range to -65°C is available. PCB layout modification is required for SMB package accommodation.

Compliance Consideration:

The B190B-13 variant (non-F suffix) is RoHS non-compliant and should not be selected for new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the BYS11-90-E3/TR replace the SS19 M2G directly on the PCB?

A: Yes. The BYS11-90-E3/TR maintains identical DO-214AC (SMA) package geometry and pinout. No PCB layout modification is required. The 1.5A current rating exceeds the original 1A specification, and the 750 mV forward voltage is lower than the original 800 mV specification, both favorable characteristics for direct substitution.

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

A: Both series share identical electrical specifications for the 90V/1.5A rating: 90V reverse voltage, 1.5A average rectified current, 750 mV forward voltage at 1A, and DO-214AC (SMA) package. The designation difference reflects internal manufacturing or process variations within Vishay's product line. Both are functionally equivalent for this application.

Q: Why do some part numbers include "E3" or "M3" designations?

A: The E3 and M3 suffixes indicate different manufacturing process or tape reel specifications within Vishay's product coding. Both variants meet identical electrical and package specifications. Selection between E3 and M3 variants depends on procurement availability and supplier preference.

Q: Can I use the HSM190JE3/TR13 if my PCB is designed for DO-214AC (SMA) package?

A: No. The HSM190JE3/TR13 uses a DO-214BA package, which has different physical dimensions and pinout orientation compared to DO-214AC (SMA). PCB layout modification is required, including pad repositioning and trace routing adjustments.

Q: Is the B190B-13-F suitable for new product designs?

A: Yes, the B190B-13-F is ROHS3 compliant and active in production. However, it requires PCB layout modification due to the DO-214AA (SMB) package form factor. The SMB package is larger than the original SMA package, which may impact board space constraints.

Q: What is the impact of forward voltage differences between substitute parts?

A: The SS19 M2G specifies 800 mV maximum forward voltage at 1A. The BYS series substitutes specify 750 mV at 1A, representing a 50 mV reduction. The B190B-13-F specifies 790 mV at 1A, representing a 10 mV reduction. Lower forward voltage reduces power dissipation and heat generation in the diode, improving circuit efficiency. All substitute parts remain within acceptable operating parameters for applications designed for the original 800 mV specification.

Q: Are there inventory considerations for substitute part selection?

A: Yes. The BYS12-90-E3/TR variant has 30,300 units in stock, and BYS12-90-E3/TR3 has 28,733 units in stock, providing substantial availability. The B190B-13-F has 74,200 units in stock. The BYS11-90-E3/TR3 has lower availability at 1,560 units. For high-volume production, the BYS12 series or B190B-13-F variants offer superior supply chain stability.

Q: What is the operating temperature range difference between substitutes?

A: The SS19 M2G and all BYS series substitutes specify -55°C to 150°C junction temperature range. The HSM190JE3/TR13 extends the upper limit to 175°C, providing 25°C additional thermal margin. The B190B-13-F extends the lower limit to -65°C, providing 10°C additional cold temperature margin. These extended ranges do not affect substitution compatibility for applications within the original -55°C to 150°C specification.

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