SF65G-TP Equivalent & Substitute Parts

Part Overview

The SF65G-TP is a general-purpose super fast recovery rectifier diode rated for 300 V DC reverse voltage and 6 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. Identification of equivalent and substitute parts is necessary for legacy system maintenance, repair operations, and design transitions to active product alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

SF65G-TP

Micro Commercial CoIn Stock: 945SF65G-TP Datasheet

Current PartRFQ

SF45GHB0G

Taiwan Semiconductor CorporationIn Stock: 1010SF45GHB0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF65G-TP is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 300 V minimum
• Package / Case: DO-201AD, Axial
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 150°C minimum
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation:

• Current - Average Rectified (Io): Substitute must equal or exceed 6 A rating
• Voltage - Forward (Vf) (Max): Substitute must not exceed 1.3 V @ rated current
• Reverse Recovery Time (trr): Substitute must not exceed 35 ns
• Current - Reverse Leakage @ Vr: Substitute must not exceed 5 µA @ 300 V

The SF45GHB0G is classified as a partial substitute due to current rating limitation. While it meets all voltage, package, thermal, and speed requirements, its 4 A average rectified current rating is below the 6 A specification of the SF65G-TP. This part is suitable only for applications where the actual operating current does not exceed 4 A.

Parameter Comparison

Engineering Selection Recommendations

SF45GHB0G Selection Criteria:

The SF45GHB0G is an active product from Taiwan Semiconductor Corporation and is suitable as a substitute for the SF65G-TP under the following conditions:

1. Current Rating Limitation: The substitute part is rated for 4 A average rectified current, compared to the 6 A rating of the main part. Selection of this substitute requires verification that the application circuit operates at or below 4 A continuous current.

2. Product Status Advantage: The SF45GHB0G carries Active product status, whereas the SF65G-TP is designated "Not For New Designs." For new system designs or long-term production support, the SF45GHB0G provides superior lifecycle availability.

3. Compliance and Certification: Both parts are ROHS3 Compliant and REACH Unaffected. The SF45GHB0G includes AEC-Q101 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components.

4. Electrical Equivalence: All critical electrical parameters—reverse voltage, forward voltage drop, reverse recovery time, and reverse leakage current—are identical between the two parts at their respective current ratings.

5. Mechanical and Thermal Compatibility: Package type (DO-201AD), mounting method (through-hole axial), and operating temperature range (-55°C to 150°C) are fully compatible.

Frequently Asked Questions (FAQ)

Q: Can the SF45GHB0G directly replace the SF65G-TP in all applications?

A: Direct replacement is possible only in applications where the circuit current does not exceed 4 A. The SF45GHB0G has a lower current rating (4 A vs. 6 A). If the application requires the full 6 A capability, the SF45GHB0G is not suitable.

Q: Are the packages physically identical?

A: Yes. Both parts use the DO-201AD axial through-hole package. Physical dimensions and lead spacing are identical, allowing direct PCB mounting without modification.

Q: What is the difference in forward voltage drop between these parts?

A: Both parts specify 1.3 V maximum forward voltage drop. The SF65G-TP is rated at 1.3 V @ 6 A, while the SF45GHB0G is rated at 1.3 V @ 4 A. At lower currents, the SF45GHB0G forward voltage drop will be lower than the maximum specification.

Q: Why is the SF65G-TP marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. The SF45GHB0G, with Active status, is the preferred choice for new designs requiring equivalent electrical performance within the 4 A current limit.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 Compliant and REACH Unaffected. The SF45GHB0G includes AEC-Q101 automotive qualification, which the SF65G-TP does not specify. This additional qualification may be required for automotive or safety-critical applications.

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

A: Both parts have a reverse recovery time of 35 ns, which is the time required for the diode to stop conducting after the applied voltage reverses. This parameter is critical in switching applications and power conversion circuits. The matching specification ensures equivalent switching performance.

Q: Can I use the SF45GHB0G in a circuit designed for 6 A operation?

A: No. Operating the SF45GHB0G above its 4 A rating will cause excessive junction temperature, reduced reliability, and potential device failure. The circuit must be redesigned or a higher-rated substitute must be selected.