SF18G-AP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The SF18G-AP is an active general purpose rectifier diode manufactured by Micro Commercial Co, rated for 600V DC reverse voltage and 1A average rectified current in a through-hole DO-41 package. This component is designed for standard rectification applications requiring fast recovery characteristics. The part is RoHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), making it suitable for standard industrial and commercial applications.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, allowing for component interchangeability in circuit designs.

Substiute Parts

SF18G-AP

Micro Commercial CoIn Stock: 920SF18G-AP Datasheet

Current PartRFQ

FR105G A0G

Taiwan Semiconductor CorporationIn Stock: 5358FR105G A0G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SF18G-AP are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -55°C to 150°C

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial (equivalent designations for the same physical form factor)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The FR105G A0G meets all electrical performance requirements and mechanical compatibility specifications, qualifying it as a parametric equivalent substitute for the SF18G-AP.

Parameter Comparison

Engineering Selection Recommendations

Both the SF18G-AP and FR105G A0G are active products with equivalent electrical ratings and mechanical compatibility. Selection between these components is based on the following factors:

Product Availability and Supply Chain: The FR105G A0G (Taiwan Semiconductor Corporation) currently maintains higher inventory availability at 5309 pieces compared to the SF18G-AP at 863 pieces. Both parts are supplied in standard packaging formats suitable for production environments.

Compliance and Regulatory Status: Both components carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and MSL 1 (Unlimited). Both are classified under ECCN EAR99 and HTSUS 8541.10.0080, ensuring equivalent regulatory treatment in procurement and export scenarios.

Packaging Format Consideration: The SF18G-AP is supplied in Tape & Box (TB) packaging, while the FR105G A0G is supplied in Cut Tape (CT) packaging. Both formats are standard for through-hole components and do not affect electrical performance or mechanical fit.

Performance Characteristics: Both parts meet the fast recovery diode classification (≤ 500ns, > 200mA). The FR105G A0G exhibits a longer reverse recovery time (250 ns versus 35 ns) and lower junction capacitance (10 pF versus 20 pF), both of which remain within acceptable operating parameters for general purpose rectification applications.

Frequently Asked Questions (FAQ)

Q: Can the FR105G A0G be used as a direct replacement for the SF18G-AP in existing circuit designs?

A: Yes. Both components share identical voltage ratings (600V DC reverse), current ratings (1A average rectified), forward voltage characteristics (1.3V @ 1A), and operating temperature range (-55°C to 150°C). The through-hole DO-41 package form factor is mechanically identical, allowing direct PCB substitution without design modification.

Q: What is the significance of the different reverse recovery times (35 ns versus 250 ns)?

A: Both parts are classified as fast recovery diodes within the ≤ 500ns specification for currents exceeding 200mA. The SF18G-AP exhibits faster recovery, which may provide marginal advantages in high-frequency switching applications. However, both values satisfy the fast recovery classification and are suitable for standard rectification circuits.

Q: Are there packaging considerations when switching between SF18G-AP and FR105G A0G?

A: The SF18G-AP is supplied in Tape & Box (TB) format, while the FR105G A0G is supplied in Cut Tape (CT) format. Both are standard packaging methods for through-hole components. Selection depends on production equipment compatibility and inventory management practices. The electrical and mechanical specifications remain unchanged regardless of packaging format.

Q: Do both parts meet the same regulatory and compliance requirements?

A: Yes. Both the SF18G-AP and FR105G A0G are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) ratings. Both are classified under identical ECCN (EAR99) and HTSUS (8541.10.0080) codes, ensuring equivalent treatment in procurement, quality assurance, and export compliance processes.

Q: What is the difference in junction capacitance between these parts?

A: The SF18G-AP has a junction capacitance of 20 pF at 4V and 1MHz, while the FR105G A0G has 10 pF under the same conditions. This difference may be relevant in high-frequency or sensitive analog applications where capacitive loading affects circuit performance. For standard rectification applications, both values are acceptable.

Q: Are both parts suitable for industrial temperature ranges?

A: Yes. Both components operate across the identical junction temperature range of -55°C to 150°C, meeting industrial and commercial temperature requirements. This range supports applications in standard industrial environments without thermal derating.