SF64-AP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The SF64-AP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 6 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. The SF64-AP features fast recovery characteristics with a reverse recovery time of 35 ns and operates across a junction temperature range of -65°C to 125°C.

Substiute Parts

SF64-AP

Micro Commercial CoIn Stock: 1049SF64-AP Datasheet

Current PartRFQ

SF64G-AP

Micro Commercial CoIn Stock: 842SF64G-AP Datasheet

DirectRFQ

MUR420HB0G

Taiwan Semiconductor CorporationIn Stock: 980MUR420HB0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF64-AP is determined by electrical and mechanical parameter compatibility within the rectifier diode category. The primary substitution criteria are:

Electrical Parameters (Critical):

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
• Current - Average Rectified (Io): Must equal or exceed 6 A
• Package / Case: Must be DO-201AD, Axial for mechanical and thermal compatibility
• Technology: Standard rectifier diode technology

Secondary Parameters (Compatibility Indicators):

• Reverse Recovery Time (trr): Indicates switching speed performance
• Forward Voltage (Vf): Affects power dissipation characteristics
• Operating Temperature Range: Defines thermal operating envelope
• RoHS Compliance: Ensures regulatory alignment

Direct Equivalent Classification: Parts meeting all critical electrical parameters and identical packaging are classified as direct equivalents. The SF64G-AP meets this criterion with identical voltage, current, and package specifications.

Similar Substitute Classification: Parts meeting voltage and package requirements but with reduced current rating are classified as similar substitutes. The MUR420HB0G operates at 200 V but with 4 A current rating, representing a downgrade in current capacity that requires application-level verification.

Parameter Comparison

Engineering Selection Recommendations

SF64G-AP (Direct Equivalent - Recommended Primary Substitute)

The SF64G-AP is the direct functional equivalent of the SF64-AP. Both parts share identical electrical specifications: 200 V reverse voltage, 6 A average rectified current, 975 mV forward voltage at 6 A, and 35 ns reverse recovery time. The SF64G-AP is currently in active product status with 747 units in stock, providing immediate procurement availability. Both parts are ROHS3 compliant and carry identical moisture sensitivity classification. The SF64G-AP features an expanded operating temperature range (-55°C to 150°C versus -65°C to 125°C), providing enhanced thermal performance. Packaging is identical: DO-201AD axial through-hole configuration. The SF64G-AP is supplied in Tape & Box packaging, suitable for automated assembly processes.

MUR420HB0G (Similar Substitute - Application-Dependent)

The MUR420HB0G is a similar substitute suitable only for applications where the 4 A current rating is sufficient. This part maintains the 200 V reverse voltage specification and DO-201AD package compatibility. The MUR420HB0G offers improved performance characteristics: 25 ns reverse recovery time (faster than SF64-AP), lower forward voltage (890 mV at 4 A), and reduced junction capacitance (65 pF). The MUR420HB0G carries AEC-Q101 automotive qualification and operates across -55°C to 175°C, providing the widest thermal envelope. This part is active with 901 units in stock. Selection of the MUR420HB0G requires confirmation that circuit design does not demand the full 6 A current capacity of the original SF64-AP.

Frequently Asked Questions (FAQ)

Q: Can SF64G-AP directly replace SF64-AP without circuit modification?

A: Yes. The SF64G-AP is a direct equivalent with identical electrical specifications across all critical parameters: 200 V reverse voltage, 6 A current rating, 975 mV forward voltage, and 35 ns reverse recovery time. Both parts use DO-201AD axial through-hole packaging. No circuit modification is required.

Q: What is the key limitation of MUR420HB0G as a substitute?

A: The MUR420HB0G is rated for 4 A average rectified current, compared to the 6 A rating of SF64-AP. This part is suitable only for applications where peak and average current demands do not exceed 4 A. Applications requiring the full 6 A capacity must use SF64G-AP.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use DO-201AD axial through-hole packaging, ensuring identical PCB footprint compatibility. No layout modifications are required when substituting between these parts.

Q: What is the difference in operating temperature ranges?

A: SF64-AP operates from -65°C to 125°C. SF64G-AP extends this to -55°C to 150°C. MUR420HB0G provides the widest range at -55°C to 175°C. Selection depends on application thermal requirements.

Q: Why is SF64-AP classified as obsolete?

A: SF64-AP is listed as obsolete by the manufacturer. SF64G-AP is the active replacement part from the same manufacturer, maintaining identical specifications while offering expanded temperature performance.

Q: Are all parts RoHS compliant?

A: Yes. SF64-AP, SF64G-AP, and MUR420HB0G are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the difference in reverse recovery time between these parts?

A: SF64-AP and SF64G-AP both specify 35 ns reverse recovery time. MUR420HB0G specifies 25 ns, indicating faster switching performance. This difference is relevant only in high-frequency switching applications.

Q: Can MUR420HB0G be used in a 6 A application?

A: No. The MUR420HB0G is rated for maximum 4 A average rectified current. Using this part in a 6 A application exceeds its electrical rating and will result in component failure or reduced reliability.