S3ABHM4G Equivalent & Substitute Parts

Part Overview

The S3ABHM4G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-214AA (SMB) surface mount package. This part is discontinued at DiGi Electronics and classified as a standard recovery diode with automotive-grade qualification (AEC-Q101). Due to its discontinued status, equivalent and substitute parts are necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A
Reverse Recovery Time (trr)	1.5 µs
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Capacitance @ Vr, F	40 pF @ 4 V, 1 MHz
Package / Case	DO-214AA, SMB
Operating Temperature - Junction	-55°C ~ 150°C
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S3ABHM4G is determined by the following critical parameters:

Parametric Equivalents (Full electrical and mechanical compatibility):

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 3 A
Package / Case: DO-214AA, SMB
Operating Temperature - Junction: -55°C ~ 150°C

Similar Parts (Compatible voltage and package, but with reduced current rating or different recovery characteristics):

Voltage - DC Reverse (Vr) (Max): 50 V
Package / Case: DO-214AA, SMB or equivalent surface mount
Current - Average Rectified (Io): 2 A or 1.5 A (reduced from 3 A)
Operating Temperature - Junction: -55°C ~ 150°C or -65°C ~ 150°C

Parts are grouped as parametric equivalents when all critical electrical parameters and package specifications match. Parts are grouped as similar when voltage rating and package are compatible but current capacity or recovery characteristics differ.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	trr (µs)	Ir @ Vr	Package	Temp Range	Status
S3ABHM4G	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5	10 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Discontinued
S3AB	Diodes Incorporated	50 V	3 A	1.15 V @ 3 A	2.0	10 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Obsolete
S3ABR5G	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5	10 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Discontinued
S3ABH	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5	10 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Active
S3ABHR5G	Taiwan Semiconductor Corporation	50 V	3 A	1.15 V @ 3 A	1.5	10 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Discontinued
CGRB301-G	Comchip Technology	50 V	3 A	1.1 V @ 3 A	Not specified	5 µA @ 50 V	DO-214AA (SMB)	-40°C ~ 150°C	Active
CGRB201-G	Comchip Technology	50 V	2 A	1.1 V @ 2 A	Not specified	5 µA @ 50 V	DO-214AA (SMB)	-40°C ~ 150°C	Active
ES2A-13-F	Diodes Incorporated	50 V	2 A	920 mV @ 2 A	0.025	5 µA @ 50 V	DO-214AA (SMB)	-55°C ~ 150°C	Active
RS2A-13-F	Diodes Incorporated	50 V	1.5 A	1.3 V @ 1.5 A	0.150	5 µA @ 50 V	DO-214AC (SMA)	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Recommended Parametric Equivalents (Direct Replacement):

The S3ABH (Taiwan Semiconductor Corporation) is the primary recommended replacement. It maintains identical electrical specifications (50 V, 3 A, 1.15 V forward voltage, 1.5 µs recovery time) and package configuration (DO-214AA SMB). The S3ABH is currently in active production status, ensuring long-term availability. It retains automotive-grade qualification and AEC-Q101 certification equivalent to the original part.

The S3ABHR5G (Taiwan Semiconductor Corporation) provides identical electrical performance and is available in cut tape packaging. Although discontinued at DiGi Electronics, it remains functionally equivalent for applications requiring the same electrical characteristics.

Alternative Parametric Equivalent:

The S3AB (Diodes Incorporated) matches all critical parameters with the exception of reverse recovery time (2.0 µs versus 1.5 µs). This difference is within acceptable tolerance for standard recovery diode applications. The part is currently obsolete but may be available through secondary sources.

Active Production Alternatives (Similar Parts):

The CGRB301-G (Comchip Technology) provides 50 V, 3 A rating in DO-214AA SMB package with active production status. Forward voltage is slightly lower (1.1 V @ 3 A) and reverse leakage is reduced (5 µA @ 50 V). Operating temperature range is -40°C ~ 150°C, which is narrower than the original part. This part is suitable for applications where the reduced temperature range is acceptable.

Lower Current Alternatives (Similar Parts):

The CGRB201-G (Comchip Technology) and ES2A-13-F (Diodes Incorporated) are rated for 2 A average rectified current. These parts are suitable only for applications where the circuit current requirement does not exceed 2 A. Both maintain 50 V voltage rating and DO-214AA SMB package configuration.

The RS2A-13-F (Diodes Incorporated) is rated for 1.5 A and uses a different package (DO-214AC SMA). This part is not recommended as a direct substitute due to package incompatibility.

Frequently Asked Questions (FAQ)

Q: Can S3ABH be used as a direct replacement for S3ABHM4G?

A: Yes. The S3ABH is a parametric equivalent with identical voltage rating (50 V), current rating (3 A), forward voltage (1.15 V @ 3 A), reverse recovery time (1.5 µs), and package configuration (DO-214AA SMB). The S3ABH is in active production, making it the recommended replacement.

Q: What is the difference between S3ABHM4G and S3AB?

A: Both parts are rated for 50 V and 3 A with identical forward voltage (1.15 V @ 3 A) and package (DO-214AA SMB). The primary difference is reverse recovery time: S3ABHM4G has 1.5 µs while S3AB has 2.0 µs. For standard recovery diode applications, this difference is typically acceptable. S3AB is currently obsolete.

Q: Can CGRB301-G replace S3ABHM4G in automotive applications?

A: CGRB301-G matches the 50 V, 3 A electrical specifications and DO-214AA SMB package. However, the operating temperature range is -40°C ~ 150°C compared to -55°C ~ 150°C for the original part. If the application requires operation below -40°C, CGRB301-G is not suitable. Additionally, CGRB301-G does not carry AEC-Q101 automotive qualification. Verify application temperature requirements before selection.

Q: Why are CGRB201-G and ES2A-13-F listed as similar parts rather than equivalents?

A: These parts are rated for 2 A average rectified current, which is lower than the 3 A rating of S3ABHM4G. They are suitable only for circuits where the maximum current does not exceed 2 A. If the circuit requires 3 A capability, these parts cannot be used as direct replacements.

Q: What is the difference between DO-214AA (SMB) and DO-214AC (SMA) packages?

A: DO-214AA (SMB) and DO-214AC (SMA) are different surface mount diode packages with different footprints and lead configurations. Parts using these different packages are not mechanically interchangeable on the same PCB. RS2A-13-F uses DO-214AC (SMA) and cannot be directly substituted for S3ABHM4G without PCB redesign.

Q: Is S3ABHR5G still available for procurement?

A: S3ABHR5G is discontinued at DiGi Electronics but may be available through secondary component distributors. It provides identical electrical performance to S3ABHM4G. For new designs, S3ABH (active production) is the recommended choice for long-term supply assurance.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive electronics qualification standard. Parts meeting this qualification have been tested and validated for automotive applications. S3ABHM4G and S3ABH carry this qualification. CGRB301-G does not, which may be a consideration for automotive applications requiring certified components.

Q: Can ES2A-13-F be used if the circuit only requires 2 A?

A: Yes, if the circuit maximum current does not exceed 2 A, ES2A-13-F is compatible. It maintains 50 V voltage rating and DO-214AA SMB package. ES2A-13-F is a fast recovery diode (25 ns trr) compared to the standard recovery characteristic of S3ABHM4G (1.5 µs trr). Fast recovery diodes have lower reverse recovery charge and may improve circuit efficiency in switching applications.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the interval required for a diode to stop conducting in the reverse direction after the forward current is removed. Standard recovery diodes (trr > 500 ns) are suitable for general-purpose rectification. Fast recovery diodes (trr ≤ 500 ns) are used in switching power supplies and high-frequency applications where lower switching losses are required. S3ABHM4G has 1.5 µs recovery time, suitable for standard rectification applications.

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