SF58-AP Equivalent & Substitute Parts

Part Overview

The SF58-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 5 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. The SF58-AP features fast recovery characteristics with a reverse recovery time of 35 ns and operates across a junction temperature range of -55°C to 150°C.

Substiute Parts

SF58-AP

Micro Commercial CoIn Stock: 756SF58-AP Datasheet

Current PartRFQ

SF58G-AP

Micro Commercial CoIn Stock: 831SF58G-AP Datasheet

DirectRFQ

31GF6-M3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 72831GF6-M3/73 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF58-AP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 600 V minimum
• Current - Average Rectified (Io): 5 A minimum
• Package / Case: DO-201AD, Axial (mechanical compatibility)
• Mounting Type: Through Hole (board-level compatibility)
• Technology: Standard rectifier diode

Direct Equivalent Classification: The SF58G-AP qualifies as a direct equivalent. It maintains identical voltage and current ratings, identical package geometry, and identical mounting type. Both parts share the same base product number (SF58) and are manufactured by the same supplier. The SF58G-AP is currently in active product status, making it the primary replacement for the obsolete SF58-AP.

Similar Substitute Classification: The 31GF6-M3/73 qualifies as a similar substitute with the following considerations: it maintains the 600 V reverse voltage rating and DO-201AD package compatibility but is rated for 3 A average rectified current, which is lower than the SF58-AP's 5 A rating. This part is suitable only for applications where the actual current requirement does not exceed 3 A.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended): The SF58G-AP is the primary substitute for the obsolete SF58-AP. Both parts are manufactured by Micro Commercial Co, share identical electrical ratings (600 V, 5 A), and use the same DO-201AD package. The SF58G-AP is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The SF58G-AP exhibits a marginally higher forward voltage (1.75 V versus 1.7 V at 5 A) and an extended lower operating temperature limit (-65°C versus -55°C), both of which are operationally compatible with the original design. Current inventory of 768 pieces supports procurement continuity.

For Current-Limited Applications: The 31GF6-M3/73 from Vishay General Semiconductor - Diodes Division serves as a substitute only in applications where the average rectified current requirement does not exceed 3 A. This part maintains 600 V reverse voltage rating and DO-201AD package compatibility. The 31GF6-M3/73 exhibits superior reverse recovery time (30 ns versus 35 ns) but higher reverse leakage current (20 µA versus 5 µA at 600 V). Operating temperature range is -40°C to 150°C. This part is suitable for designs with reduced current demands and is not a full-rating equivalent.

Frequently Asked Questions (FAQ)

Q: Can the SF58G-AP be used as a direct replacement for the SF58-AP? A: Yes. The SF58G-AP is a direct equivalent with identical voltage (600 V), current (5 A), and package (DO-201AD) specifications. The SF58G-AP is manufactured by the same supplier and is currently in active product status.

Q: What is the primary reason for substituting the SF58-AP? A: The SF58-AP is classified as obsolete. The SF58G-AP provides continuity for new designs and ongoing procurement.

Q: Can the 31GF6-M3/73 replace the SF58-AP in all applications? A: No. The 31GF6-M3/73 is rated for 3 A average rectified current, which is lower than the SF58-AP's 5 A rating. It is suitable only for applications where actual current does not exceed 3 A.

Q: Are all substitute parts RoHS compliant? A: Yes. The SF58G-AP and 31GF6-M3/73 are both ROHS3 compliant, matching the compliance status of the original SF58-AP.

Q: Do the substitute parts use the same package as the SF58-AP? A: Yes. Both the SF58G-AP and 31GF6-M3/73 use the DO-201AD axial through-hole package, ensuring mechanical and board-level compatibility.

Q: What is the difference in forward voltage between the SF58-AP and SF58G-AP? A: The SF58-AP has a maximum forward voltage of 1.7 V at 5 A, while the SF58G-AP has a maximum forward voltage of 1.75 V at 5 A. This 0.05 V difference is within typical design tolerances for rectifier applications.

Q: Does the SF58G-AP support a wider operating temperature range? A: Yes. The SF58G-AP operates from -65°C to 150°C, compared to the SF58-AP's -55°C to 150°C range. The SF58G-AP provides an extended lower temperature capability.

Q: What is the reverse recovery time for each part? A: The SF58-AP and SF58G-AP both have a reverse recovery time of 35 ns. The 31GF6-M3/73 has a faster reverse recovery time of 30 ns.

Q: Are there inventory considerations for these parts? A: The SF58-AP has 658 pieces in stock (obsolete status). The SF58G-AP has 768 pieces in stock (active status). The 31GF6-M3/73 has 699 pieces in stock (active status).