SF66-AP Equivalent & Substitute Parts

Part Overview

The SF66-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 6 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, making identification of active equivalent components necessary for ongoing design support and procurement continuity. The SF66-AP operates across a junction temperature range of -65°C to 125°C and features fast recovery characteristics with a reverse recovery time of 35 nanoseconds.

Substiute Parts

SF66-AP

Micro Commercial CoIn Stock: 1170SF66-AP Datasheet

Current PartRFQ

SF66G-AP

Micro Commercial CoIn Stock: 1053SF66G-AP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SF66-AP with the SF66G-AP is based on electrical and mechanical parameter equivalence within the allowed specifications for general-purpose rectifier diodes. The substitution logic is determined by the following critical parameters:

• Voltage Rating: Both parts maintain identical 400 V DC reverse voltage maximum
• Current Rating: Both parts support 6 A average rectified current
• Forward Voltage Drop: Both parts specify 1.3 V maximum forward voltage at 6 A
• Reverse Recovery Time: Both parts exhibit 35 ns reverse recovery time
• Reverse Leakage Current: Both parts maintain 5 µA maximum reverse leakage at 400 V
• Package and Mounting: Both parts use DO-201AD axial through-hole configuration
• Technology: Both parts employ standard rectifier diode technology

The SF66G-AP is an active product variant of the SF66 base product series, providing direct functional replacement for the obsolete SF66-AP in applications requiring these electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SF66G-AP is the direct active equivalent for the obsolete SF66-AP. Both parts share identical electrical specifications, package configuration, and compliance certifications. The SF66G-AP maintains ROHS3 compliance and carries REACH Unaffected status, supporting regulatory requirements for current procurement.

The SF66G-AP provides an extended operating temperature range (-55°C to 150°C) compared to the SF66-AP (-65°C to 125°C), offering improved thermal performance margins in applications operating at elevated temperatures. The substitute part is currently in active production status with confirmed inventory availability, ensuring supply chain continuity for replacement and new design applications.

Both parts are suitable for through-hole PCB assembly and maintain identical electrical performance characteristics across all critical parameters including voltage rating, current capacity, forward voltage drop, and reverse recovery time.

Frequently Asked Questions (FAQ)

Q: Can the SF66G-AP directly replace the SF66-AP in existing designs?

A: Yes. The SF66G-AP provides direct functional replacement for the SF66-AP. Both parts maintain identical electrical specifications, forward voltage characteristics, reverse recovery time, and DO-201AD through-hole package configuration. No circuit modifications are required.

Q: What is the primary difference between SF66-AP and SF66G-AP?

A: The SF66-AP is obsolete, while the SF66G-AP is an active product. The SF66G-AP also features an extended operating temperature range of -55°C to 150°C compared to the SF66-AP range of -65°C to 125°C. All electrical parameters remain identical.

Q: Are there packaging differences between these parts?

A: The SF66-AP is supplied without specified packaging, while the SF66G-AP is supplied in Tape & Box (TB) format. Both parts use the same DO-201AD axial through-hole package configuration for PCB mounting.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the SF66-AP and SF66G-AP are ROHS3 compliant. The SF66G-AP additionally carries REACH Unaffected status, confirming compliance with current environmental regulations.

Q: What is the reverse recovery time specification for these diodes?

A: Both parts specify a reverse recovery time of 35 nanoseconds, classifying them as fast recovery rectifier diodes suitable for applications requiring rapid switching characteristics.

Q: Are these parts suitable for high-temperature applications?

A: The SF66G-AP supports operation up to 150°C junction temperature, making it suitable for elevated temperature environments. The obsolete SF66-AP is rated to 125°C junction temperature.