SF38-AP Equivalent & Substitute Parts

Part Overview

The SF38-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 3 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 SF38-AP operates across a junction temperature range of -55°C to 125°C and complies with RoHS3 standards.

Substiute Parts

SF38-AP

Micro Commercial CoIn Stock: 1190SF38-AP Datasheet

Current PartRFQ

SF38G-AP

Micro Commercial CoIn Stock: 641SF38G-AP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF38-AP is determined by equivalence across the following critical electrical and mechanical parameters:

• Voltage Rating: DC reverse voltage must equal 600 V
• Current Rating: Average rectified current must equal 3 A
• Package Type: DO-201AD axial through-hole configuration required for mechanical compatibility
• Recovery Characteristics: Fast recovery classification with reverse recovery time ≤ 500 ns
• Reverse Leakage: Maximum 5 µA at rated voltage
• Compliance: RoHS3 compliance required

The SF38G-AP qualifies as a direct substitute based on matching all critical electrical specifications and package requirements. The SF38G-AP is an active product, providing procurement continuity for the obsolete SF38-AP.

Parameter Comparison

Engineering Selection Recommendations

The SF38G-AP is the direct substitute for the SF38-AP. Both components share identical voltage and current ratings, package configuration, and compliance certifications. The SF38G-AP is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete SF38-AP.

The SF38G-AP exhibits a marginally higher forward voltage drop (1.75 V versus 1.7 V at 3 A) and an extended operating temperature range (-65°C to 150°C versus -55°C to 125°C). These differences represent improvements in thermal performance and operational envelope. The SF38G-AP is supplied in Tape & Box packaging, suitable for both manual and automated assembly processes.

Selection of the SF38G-AP eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs utilizing the SF38-AP.

Frequently Asked Questions (FAQ)

Q: Can the SF38G-AP directly replace the SF38-AP in existing designs?

A: Yes. The SF38G-AP meets all critical electrical specifications of the SF38-AP, including voltage rating (600 V), current rating (3 A), reverse recovery time (35 ns), and reverse leakage current (5 µA @ 600 V). The DO-201AD axial through-hole package is identical, enabling direct mechanical substitution without PCB redesign.

Q: What is the significance of the forward voltage difference between SF38-AP and SF38G-AP?

A: The SF38G-AP forward voltage is 1.75 V at 3 A compared to 1.7 V for the SF38-AP. This 0.05 V difference is within typical manufacturing tolerance ranges for rectifier diodes and does not affect circuit functionality in standard rectification applications. Power dissipation impact is negligible in most designs.

Q: Why does the SF38G-AP have a wider operating temperature range?

A: The SF38G-AP operates from -65°C to 150°C, compared to -55°C to 125°C for the SF38-AP. This extended range reflects improvements in the active product line and provides additional design margin for applications requiring operation at temperature extremes.

Q: Are there packaging differences between SF38-AP and SF38G-AP?

A: The SF38-AP packaging is not specified in available data. The SF38G-AP is supplied in Tape & Box (TB) packaging, which is standard for through-hole components and compatible with both manual and automated assembly processes.

Q: What compliance certifications apply to the SF38G-AP?

A: The SF38G-AP is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.

Q: Why is the SF38-AP classified as obsolete?

A: The SF38-AP is no longer in active production. The SF38G-AP represents the current active equivalent from the same manufacturer, providing continued access to this rectifier specification with improved product support and supply availability.