SF65G A0G Equivalent & Substitute Parts

Part Overview

The SF65G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 300 V DC reverse voltage and 6 A average rectified current. The device features fast recovery characteristics with a reverse recovery time of 35 ns and is housed in a DO-201AD axial through-hole package. This diode is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance is required within specified parameter tolerances, or when the primary part becomes unavailable from inventory sources.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 6	V @ A
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 300 V
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the SF65G A0G is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 300 V
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
Operating Temperature Range: -55°C to 150°C minimum
RoHS3 Compliance status

Allowable Parameter Variations:

Current - Average Rectified (Io): Substitute parts must equal or exceed 6 A rating
Voltage - Forward (Vf): Substitute parts must not exceed 1.3 V @ rated current
Reverse Recovery Time (trr): Substitute parts may vary; fast recovery (≤500 ns) or standard recovery (>500 ns) are both acceptable unless application-specific speed requirements apply
Current - Reverse Leakage: Substitute parts must not exceed 5 µA @ 300 V

The 1N5403-E3/54 is identified as a substitute part; however, it operates at 3 A average rectified current, which is below the 6 A specification of the SF65G A0G. This part is suitable only for applications where the actual circuit current demand does not exceed 3 A.

Parameter Comparison

Parameter	SF65G A0G	1N5403-E3/54	Match Status
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	Match
Current - Average Rectified (Io)	6 A	3 A	Substitute Lower
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 6 A	1.2 V @ 3 A	Comparable
Speed Classification	Fast Recovery ≤ 500 ns	Standard Recovery > 500 ns	Different
Reverse Recovery Time (trr)	35 ns	Not Specified	Main Part Superior
Current - Reverse Leakage @ Vr	5 µA @ 300 V	5 µA @ 300 V	Match
Package / Case	DO-201AD, Axial	DO-201AD, Axial	Match
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match

Engineering Selection Recommendations

SF65G A0G (Primary Part): The SF65G A0G is the specified component for applications requiring 6 A average rectified current at 300 V reverse voltage with fast recovery characteristics. This part is Active status, RoHS3 compliant, and maintains full compliance with REACH and EAR99 export classifications. The fast recovery time of 35 ns is suitable for high-frequency switching applications.

1N5403-E3/54 (Substitute Part): The 1N5403-E3/54 is a substitute option only for circuits where the actual average rectified current requirement does not exceed 3 A. This part is also Active status and RoHS3 compliant. The primary differences are reduced current rating (3 A versus 6 A) and standard recovery speed classification (>500 ns versus fast recovery ≤500 ns). Selection of this substitute requires verification that circuit operating conditions remain within the 3 A current limit.

Frequently Asked Questions (FAQ)

Q: Can the 1N5403-E3/54 be used as a direct replacement for the SF65G A0G?

A: The 1N5403-E3/54 shares the same 300 V reverse voltage rating, DO-201AD package, and operating temperature range. However, the current rating is reduced from 6 A to 3 A. Direct replacement is only valid if the circuit operates at or below 3 A average rectified current. Exceeding this current rating will cause device failure.

Q: What are the key differences between these two diodes?

A: The primary differences are: (1) Current - Average Rectified: SF65G A0G is rated 6 A, 1N5403-E3/54 is rated 3 A; (2) Recovery Speed: SF65G A0G features fast recovery (35 ns), 1N5403-E3/54 uses standard recovery (>500 ns); (3) Forward Voltage: SF65G A0G is 1.3 V @ 6 A, 1N5403-E3/54 is 1.2 V @ 3 A. All other parameters match.

Q: Are both parts RoHS3 compliant?

A: Yes, both the SF65G A0G and 1N5403-E3/54 are RoHS3 compliant and REACH unaffected. Both parts carry EAR99 export classification.

Q: Does the difference in recovery time affect substitution?

A: Recovery time differences affect circuit performance in switching applications. The SF65G A0G with 35 ns fast recovery is optimized for high-frequency rectification. The 1N5403-E3/54 with standard recovery (>500 ns) is suitable for lower-frequency applications. Application-specific requirements determine whether this difference is acceptable.

Q: Can the SF65G A0G be used in place of the 1N5403-E3/54?

A: Yes, the SF65G A0G can be used as a substitute for the 1N5403-E3/54 in all applications. The SF65G A0G provides higher current capacity (6 A versus 3 A) and faster recovery time, making it suitable for any circuit designed for the 1N5403-E3/54.

Q: What is the significance of the DO-201AD package?

A: The DO-201AD is an axial through-hole package with standardized lead spacing and mounting characteristics. Both parts use this identical package, ensuring mechanical and electrical compatibility in PCB layouts designed for either component.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message