SF48G A0G Equivalent & Substitute Parts

Part Overview

The SF48G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 4 A average rectified current in a DO-201AD axial through-hole package. This diode is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the original component, enabling direct replacement in circuit applications where the SF48G A0G may be unavailable or where design flexibility permits alternative sourcing.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 4 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Mounting Type	Through Hole
Package / Case	DO-201AD, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SF48G A0G are classified into two functional categories based on electrical parameter compatibility:

Category 1: Direct Current Rating Equivalents (4 A) Parts with 4 A average rectified current rating match the original component's current handling capacity. These parts maintain identical voltage specifications (600 V) and are suitable for direct replacement without circuit redesign.

Category 2: Reduced Current Rating Substitutes (3 A) Parts with 3 A average rectified current rating operate below the original specification. These substitutes are applicable only in circuits where the actual operating current does not exceed 3 A, even though the original design specified 4 A capability.

Category 3: Elevated Current Rating Substitutes (6 A) Parts with 6 A average rectified current rating exceed the original specification. These substitutes provide additional current margin and are suitable for direct replacement in all applications where the SF48G A0G is specified.

All substitute parts maintain the following critical parameters:

Voltage - DC Reverse (Vr): 600 V
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vf (Max) @ If	Speed	trr (ns)	Ir @ 600V (µA)	Tj (Max)
SF48G A0G	Taiwan Semiconductor Corporation	4	1.7 V @ 4 A	Fast Recovery ≤ 500 ns	35	5	150°C
1N5406-E3/54	Vishay General Semiconductor	3	1.2 V @ 3 A	Standard Recovery > 500 ns	—	5	150°C
1N5406-E3/73	Vishay General Semiconductor	3	1.2 V @ 3 A	Standard Recovery > 500 ns	—	5	150°C
60S6-TP	Micro Commercial Co	6	1.0 V @ 6 A	Standard Recovery > 500 ns	—	5	150°C
GP30J-E3/54	Vishay General Semiconductor	3	1.1 V @ 3 A	Standard Recovery > 500 ns	5000	5	175°C
GP30J-E3/73	Vishay General Semiconductor	3	1.1 V @ 3 A	Standard Recovery > 500 ns	5000	5	175°C
MUR460-E3/54	Vishay General Semiconductor	4	1.28 V @ 4 A	Fast Recovery ≤ 500 ns	75	10	175°C
RGP30J-E3/54	Vishay General Semiconductor	3	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	250	5	175°C
STTH3L06	STMicroelectronics	3	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	85	3	175°C
STTH3R06	STMicroelectronics	3	1.7 V @ 3 A	Fast Recovery ≤ 500 ns	35	3	175°C
STTH3R06RL	STMicroelectronics	3	1.7 V @ 3 A	Fast Recovery ≤ 500 ns	35	3	175°C

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement)

MUR460-E3/54 is the primary direct equivalent, matching the SF48G A0G in both current rating (4 A) and fast recovery speed classification (≤ 500 ns). This part is manufactured by Vishay General Semiconductor, carries Active product status, and is ROHS3 compliant. The forward voltage specification (1.28 V @ 4 A) is lower than the original, resulting in reduced power dissipation. The reverse recovery time (75 ns) is longer than the original (35 ns), which may affect switching performance in high-frequency applications but remains within fast recovery classification.

Current-Rated Substitutes (3 A Category)

Parts in the 3 A category—1N5406-E3/54, 1N5406-E3/73, GP30J-E3/54, GP30J-E3/73, RGP30J-E3/54, STTH3L06, STTH3R06, and STTH3R06RL—are suitable only when circuit analysis confirms that actual operating current does not exceed 3 A. All are Active product status and ROHS3 compliant. The Vishay SUPERECTIFIER® series (GP30J and RGP30J) offer extended operating temperature ranges (up to 175°C) compared to the original specification (150°C). STMicroelectronics parts (STTH3 series) provide lower reverse leakage current (3 µA versus 5 µA) and fast recovery characteristics.

Elevated Current Rating Substitute (6 A Category)

The 60S6-TP manufactured by Micro Commercial Co provides 6 A current capacity, exceeding the original specification. This part is suitable for all applications where the SF48G A0G is specified and offers additional current margin. It is Active product status and ROHS3 compliant. The forward voltage (1.0 V @ 6 A) is lower than the original, reducing power dissipation.

All substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, matching the regulatory status of the original component.

Frequently Asked Questions (FAQ)

Q: Can I use a 3 A rated diode as a substitute for the SF48G A0G (4 A rated)?

A: A 3 A rated substitute is applicable only if circuit analysis confirms that the actual operating current does not exceed 3 A. The original SF48G A0G specification of 4 A indicates the design margin intended by the circuit designer. Using a lower-rated part removes this margin and may result in premature failure if transient or peak currents exceed 3 A.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Recovery speed refers to the reverse recovery time (trr), which is the time required for a diode to transition from forward conduction to reverse blocking. Fast recovery diodes (≤ 500 ns) are suitable for high-frequency switching applications and reduce switching losses. Standard recovery diodes (> 500 ns) are appropriate for lower-frequency rectification. The SF48G A0G specifies fast recovery (35 ns), so substitutes should maintain this characteristic for equivalent performance.

Q: Are all substitute parts available in the same DO-201AD package?

A: Yes, all substitute parts listed are available in the DO-201AD axial through-hole package, ensuring mechanical compatibility with the original circuit board layout and component mounting.

Q: What is the significance of forward voltage (Vf) differences between the original and substitute parts?

A: Forward voltage affects power dissipation in the diode. Lower forward voltage results in reduced heat generation. The SF48G A0G specifies 1.7 V @ 4 A, while substitutes range from 1.0 V to 1.7 V depending on the part. Lower Vf values reduce thermal load on the circuit but may require verification that the circuit design does not depend on the original voltage drop for bias or reference purposes.

Q: Can I use the MUR460-E3/54 as a direct replacement for the SF48G A0G?

A: Yes, the MUR460-E3/54 is a direct equivalent, matching the 4 A current rating and fast recovery speed classification. It is manufactured by Vishay General Semiconductor, carries Active product status, and is ROHS3 compliant. The lower forward voltage (1.28 V versus 1.7 V) and longer reverse recovery time (75 ns versus 35 ns) should be evaluated for the specific application, but both parameters remain within acceptable ranges for general-purpose rectification.

Q: What is the operating temperature range consideration when selecting a substitute?

A: The SF48G A0G specifies a junction temperature range of -55°C to 150°C. Several substitutes, including the Vishay SUPERECTIFIER® series and STMicroelectronics parts, extend the maximum junction temperature to 175°C. This extended range provides additional thermal margin in high-temperature environments but does not affect substitutability in applications operating within the original -55°C to 150°C range.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: All substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, matching the regulatory status of the SF48G A0G. No compliance barriers exist for substitution.

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