SF38G A0G Equivalent & Substitute Parts

Part Overview

The SF38G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Active and complies with ROHS3 standards. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the original device, enabling circuit designers to source alternative components when the primary part is unavailable or when design requirements permit higher performance characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 3 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Package / Case	DO-201AD, Axial	-
Mounting Type	Through Hole	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SF38G A0G are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Secondary Performance Characteristics:

Voltage - Forward (Vf) (Max) @ If: Determines power dissipation and thermal performance
Speed Classification: Fast Recovery or Standard Recovery
Reverse Recovery Time (trr): Affects switching performance in high-frequency applications
Current - Reverse Leakage @ Vr: Influences standby power consumption
Operating Temperature - Junction: Defines thermal operating range

Parts are classified into two categories:

Category A - Direct Equivalents (3 A rated current): Parts meeting or exceeding all primary matching criteria with identical current ratings. These include 1N5406-E3/54, 1N5406-E3/73, GP30J-E3/54, GP30J-E3/73, RGP30J-E3/54, STTH3L06, and STTH3R06.

Category B - Higher Current Rated Parts: Parts exceeding the 3 A current specification, suitable for applications with design margin requirements. These include 60S6-TP (6 A) and MUR460-E3/54 (4 A).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	RoHS
SF38G A0G	Taiwan Semiconductor Corporation	600	3	1.7 @ 3 A	Fast Recovery ≤ 500ns	35	5 @ 600 V	DO-201AD	-55 to 150	ROHS3
1N5406-E3/54	Vishay General Semiconductor	600	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 600 V	DO-201AD	-50 to 150	ROHS3
1N5406-E3/73	Vishay General Semiconductor	600	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 600 V	DO-201AD	-50 to 150	ROHS3
60S6-TP	Micro Commercial Co	600	6	1.0 @ 6 A	Standard Recovery >500ns	-	5 @ 600 V	DO-201AD	-55 to 150	ROHS3
GP30J-E3/54	Vishay General Semiconductor	600	3	1.1 @ 3 A	Standard Recovery >500ns	5000	5 @ 600 V	DO-201AD	-65 to 175	ROHS3
GP30J-E3/73	Vishay General Semiconductor	600	3	1.1 @ 3 A	Standard Recovery >500ns	5000	5 @ 600 V	DO-201AD	-65 to 175	ROHS3
MUR460-E3/54	Vishay General Semiconductor	600	4	1.28 @ 4 A	Fast Recovery ≤ 500ns	75	10 @ 600 V	DO-201AD	-65 to 175	ROHS3
RGP30J-E3/54	Vishay General Semiconductor	600	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	250	5 @ 600 V	DO-201AD	-65 to 175	ROHS3
STTH3L06	STMicroelectronics	600	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	85	3 @ 600 V	DO-201AD	-55 to 175	ROHS3
STTH3R06	STMicroelectronics	600	3	1.7 @ 3 A	Fast Recovery ≤ 500ns	35	3 @ 600 V	DO-201AD	-55 to 175	ROHS3

Engineering Selection Recommendations

All substitute parts listed are Active status components compliant with ROHS3 standards and REACH regulations, suitable for direct replacement in applications where the SF38G A0G is specified.

For applications requiring identical electrical characteristics: The STTH3R06 (STMicroelectronics) provides the closest match to the SF38G A0G, with identical forward voltage (1.7 V @ 3 A), reverse recovery time (35 ns), and fast recovery speed classification. This part maintains the same thermal operating range (-55°C to 175°C maximum junction temperature) and offers lower reverse leakage current (3 µA versus 5 µA).

For applications permitting lower forward voltage: The 1N5406-E3/54 and 1N5406-E3/73 (Vishay) offer reduced forward voltage (1.2 V @ 3 A), resulting in lower power dissipation. These parts operate with Standard Recovery speed classification and are suitable for low-frequency rectification circuits where switching speed is not critical.

For applications requiring enhanced thermal performance: The GP30J-E3/54 and GP30J-E3/73 (Vishay SUPERECTIFIER® series) provide extended operating temperature range (-65°C to 175°C) and reduced forward voltage (1.1 V @ 3 A), enabling operation in higher ambient temperature environments with improved efficiency.

For applications with higher current margin requirements: The 60S6-TP (Micro Commercial Co) rated at 6 A and MUR460-E3/54 (Vishay) rated at 4 A provide design margin for applications where current headroom is required. Both maintain 600 V reverse voltage rating and DO-201AD package compatibility.

For applications requiring fast switching performance: The RGP30J-E3/54 (Vishay SUPERECTIFIER® series) and STTH3L06 (STMicroelectronics) offer fast recovery characteristics with reverse recovery times of 250 ns and 85 ns respectively, suitable for high-frequency switching applications.

Frequently Asked Questions (FAQ)

Q: Can the SF38G A0G be replaced with a 1N5406-E3/73?

A: Yes. Both parts share identical voltage rating (600 V), current rating (3 A), and DO-201AD package. The 1N5406-E3/73 offers lower forward voltage (1.2 V versus 1.7 V), reducing power dissipation. The primary difference is speed classification: the SF38G A0G is Fast Recovery (≤ 500ns, 35 ns trr) while the 1N5406-E3/73 is Standard Recovery (>500ns). This substitution is suitable for low-frequency rectification circuits.

Q: What is the difference between Fast Recovery and Standard Recovery speed classifications?

A: Fast Recovery diodes exhibit reverse recovery times of 500 ns or less, enabling operation in high-frequency switching applications with reduced switching losses. Standard Recovery diodes have reverse recovery times exceeding 500 ns, suitable for low-frequency power supply and rectification applications. The SF38G A0G is classified as Fast Recovery with 35 ns reverse recovery time.

Q: Is the STTH3R06 a direct equivalent to the SF38G A0G?

A: The STTH3R06 provides the closest electrical match, with identical forward voltage (1.7 V @ 3 A), reverse recovery time (35 ns), and fast recovery speed classification. Both parts are rated for 600 V and 3 A in DO-201AD packages. The STTH3R06 offers lower reverse leakage current (3 µA versus 5 µA) and extended maximum junction temperature (175°C versus 150°C).

Q: Can I use the 60S6-TP as a substitute for the SF38G A0G?

A: Yes. The 60S6-TP is rated for 600 V and 6 A in a DO-201AD package, exceeding the SF38G A0G specifications. This part is suitable for applications where higher current capacity provides design margin. The 60S6-TP operates with Standard Recovery speed classification and lower forward voltage (1.0 V @ 6 A), resulting in reduced power dissipation.

Q: What are the packaging differences between the substitute parts?

A: All substitute parts listed use the DO-201AD axial through-hole package, identical to the SF38G A0G. Packaging variants (Cut Tape versus Tape & Reel) affect supply and handling but do not impact electrical or mechanical compatibility. The DO-201AD package is a standard axial lead configuration suitable for through-hole PCB mounting.

Q: Which substitute part offers the best thermal performance?

A: The GP30J-E3/54 and GP30J-E3/73 (Vishay SUPERECTIFIER® series) provide extended operating temperature range (-65°C to 175°C) and reduced forward voltage (1.1 V @ 3 A), enabling superior thermal performance in high-temperature environments. The STTH3L06 and STTH3R06 (STMicroelectronics) also support 175°C maximum junction temperature with fast recovery characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the SF38G A0G.

Q: What is the significance of reverse leakage current in diode selection?

A: Reverse leakage current (Ir) determines standby power consumption when the diode is reverse-biased. The SF38G A0G specifies 5 µA @ 600 V. Lower reverse leakage (such as 3 µA in the STTH3R06 and STTH3L06) reduces power dissipation in standby conditions, beneficial for battery-powered or low-power applications. Higher reverse leakage (such as 10 µA in the MUR460-E3/54) has minimal impact in high-current rectification circuits.

Q: Can I substitute the SF38G A0G with the MUR460-E3/54 in a 3 A circuit?

A: Yes. The MUR460-E3/54 is rated for 4 A, exceeding the 3 A requirement of the SF38G A0G. This part provides design margin and is suitable for applications where higher current capacity is beneficial. The MUR460-E3/54 offers fast recovery characteristics (75 ns trr) and extended operating temperature range (-65°C to 175°C), making it suitable for high-frequency switching applications.

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