SF35G-TP Equivalent & Substitute Parts

Part Overview

The SF35G-TP 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 This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Identification of equivalent and substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when original stock becomes unavailable.

Substiute Parts

SF35G-TP

Micro Commercial CoIn Stock: 747SF35G-TP Datasheet

Current PartRFQ

SF35G B0G

Taiwan Semiconductor CorporationIn Stock: 896SF35G B0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF35G-TP is determined by electrical and mechanical parameter equivalence within the general-purpose rectifier diode category. The critical parameters governing substitution are:

• Voltage Rating: DC reverse voltage must equal or exceed 300 V
• Current Rating: Average rectified current must equal or exceed 3 A
• Package Type: Physical form factor must be DO-201AD axial through-hole to ensure mechanical compatibility with existing PCB layouts
• Forward Voltage: Operating forward voltage at rated current must be within acceptable circuit design margins
• Reverse Recovery Time: Fast recovery characteristic (≤ 500 ns at > 200 mA) must be maintained
• Temperature Range: Operating junction temperature range must support the application environment
• Compliance: RoHS3 compliance and REACH unaffected status must be maintained

The substitute part SF35G B0G from Taiwan Semiconductor Corporation meets all these criteria and is classified as Active product status, making it suitable for ongoing applications.

Parameter Comparison

Engineering Selection Recommendations

The SF35G B0G from Taiwan Semiconductor Corporation is a direct electrical and mechanical substitute for the SF35G-TP. Both components share identical voltage and current ratings, package configuration, and fast recovery characteristics. The SF35G B0G carries Active product status, ensuring continued availability and manufacturing support, whereas the SF35G-TP is designated Not For New Designs.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The forward voltage differential of 0.03 V between the two parts falls within standard engineering tolerances for rectifier diode applications and does not constitute a functional limitation.

The operating temperature range of the SF35G B0G (-55°C to 150°C) is narrower than the SF35G-TP (-65°C to 150°C) by 10°C at the lower bound. Applications requiring operation below -55°C junction temperature must retain the original SF35G-TP or identify alternative parts with extended low-temperature ratings.

The capacitance specification difference (30 pF versus 60 pF at 4 V, 1 MHz) reflects manufacturing variation within the diode category and does not affect substitution suitability for standard rectification applications.

Frequently Asked Questions (FAQ)

Q: Can the SF35G B0G replace the SF35G-TP in existing designs?

A: Yes. Both components are rated for 300 V DC reverse voltage and 3 A average rectified current with identical DO-201AD axial through-hole packages. Electrical performance is equivalent within standard engineering tolerances. The primary consideration is the lower temperature minimum of the SF35G B0G (-55°C versus -65°C).

Q: What is the significance of the "Not For New Designs" status on the SF35G-TP?

A: This designation indicates the manufacturer has discontinued active development and promotion of this part number. The SF35G-TP remains available from existing inventory but will not receive design updates or extended production commitments. The SF35G B0G, with Active status, is the recommended path for new applications.

Q: Are there mechanical compatibility concerns when substituting these parts?

A: No. Both the SF35G-TP and SF35G B0G use the DO-201AD axial through-hole package with identical physical dimensions and lead spacing. Direct PCB footprint compatibility is confirmed.

Q: How do the forward voltage specifications affect circuit performance?

A: The SF35G-TP specifies 1.27 V maximum forward voltage at 3 A, while the SF35G B0G specifies 1.3 V maximum at the same current. This 0.03 V difference is within typical rectifier diode manufacturing tolerance and does not require circuit redesign for standard power supply and rectification applications.

Q: What compliance certifications apply to both parts?

A: Both the SF35G-TP and SF35G B0G are ROHS3 compliant and REACH unaffected. These certifications confirm compliance with European Union hazardous substance restrictions and are suitable for applications subject to environmental and regulatory requirements.

Q: Is the capacitance difference between these parts significant?

A: The SF35G-TP specifies 30 pF at 4 V, 1 MHz, while the SF35G B0G specifies 60 pF at the same conditions. This difference reflects normal manufacturing variation in junction capacitance and does not affect substitution suitability for rectification applications. High-frequency switching applications should verify capacitance specifications against circuit requirements.

Q: What is the reverse recovery time, and why is it important?

A: Both parts specify 35 ns reverse recovery time, confirming fast recovery diode classification. This parameter defines the time required for the diode to transition from forward conduction to reverse blocking state. Fast recovery characteristics (≤ 500 ns) are essential for switching power supplies and high-frequency rectification circuits.