SF35G-AP Equivalent & Substitute Parts

Part Overview

The SF35G-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 300 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for maintaining legacy systems, supporting existing production lines, and ensuring design continuity where this diode is currently specified.

Substiute Parts

SF35G-AP

Micro Commercial CoIn Stock: 997SF35G-AP Datasheet

Current PartRFQ

SF35G B0G

Taiwan Semiconductor CorporationIn Stock: 896SF35G B0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF35G-AP is determined by strict equivalence across the following critical parameters:

• Voltage Rating: DC reverse voltage must equal or exceed 300 V
• Current Rating: Average rectified current must equal or exceed 3 A
• Package Type: DO-201AD axial through-hole package is mandatory for mechanical and electrical compatibility
• Forward Voltage: Maximum forward voltage drop at rated current must not exceed specified limits to preserve circuit performance
• Reverse Recovery Time: Fast recovery characteristic (≤500 ns, >200 mA) must be maintained
• Reverse Leakage: Maximum reverse leakage current at rated voltage must not exceed 5 µA
• Temperature Range: Operating junction temperature range must support the application environment
• Compliance: RoHS3 compliance and REACH unaffected status must be maintained

Substitute parts must match all electrical parameters within the specified tolerances and maintain identical package and mounting characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SF35G B0G (Taiwan Semiconductor Corporation) is a direct electrical and mechanical substitute for the SF35G-AP. Both components share identical voltage and current ratings, package configuration, and compliance certifications.

Key Considerations:

• Product Status: The SF35G-AP is classified as "Not For New Designs," while the SF35G B0G maintains active product status. The SF35G B0G is the appropriate selection for ongoing production and legacy system support.

• Forward Voltage: The SF35G B0G exhibits a maximum forward voltage of 1.3 V compared to 1.27 V for the SF35G-AP. This 0.03 V difference is within acceptable tolerance for standard rectifier applications and does not compromise circuit functionality.

• Capacitance: The SF35G B0G has a capacitance of 60 pF versus 30 pF for the SF35G-AP. This parameter difference may affect high-frequency switching behavior; circuit validation is required if the application operates at frequencies where diode capacitance is a critical design factor.

• Temperature Range: The SF35G B0G operates from -55°C to 150°C, compared to -65°C to 150°C for the SF35G-AP. Applications requiring operation below -55°C require verification against the SF35G B0G specifications.

• Compliance: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SF35G B0G be used as a direct replacement for the SF35G-AP in existing designs?

A: Yes. The SF35G B0G meets all critical electrical parameters: 300 V reverse voltage, 3 A average rectified current, 35 ns reverse recovery time, and DO-201AD axial through-hole package. Both components are ROHS3 compliant. The forward voltage difference of 0.03 V is within standard tolerance for rectifier applications.

Q: What is the significance of the capacitance difference between these parts?

A: The SF35G B0G has 60 pF capacitance compared to 30 pF for the SF35G-AP. In applications where the diode operates at high switching frequencies or where capacitive effects influence circuit timing, this difference may require circuit analysis. For standard 50/60 Hz power supply applications, this difference is not significant.

Q: Does the narrower temperature range of the SF35G B0G affect compatibility?

A: The SF35G B0G operates from -55°C to 150°C, while the SF35G-AP operates from -65°C to 150°C. If the application requires operation below -55°C, the SF35G B0G is not suitable. For applications within the -55°C to 150°C range, both components are equivalent.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the SF35G-AP and SF35G B0G are ROHS3 compliant and REACH unaffected. They share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Why is the SF35G-AP marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates the SF35G-AP has reached end-of-life. New designs should specify the SF35G B0G, which maintains active product status and ensures long-term availability and supply chain continuity.

Q: Can the SF35G B0G be used in high-frequency switching applications?

A: The SF35G B0G maintains the same 35 ns reverse recovery time as the SF35G-AP, supporting fast recovery operation. However, the higher capacitance (60 pF) may affect performance in applications operating at very high switching frequencies. Circuit-level analysis is required to confirm suitability for specific high-frequency applications.