SFAF2004G C0G Equivalent & Substitute Parts

Part Overview

The SFAF2004G C0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 20 A average rectified current in a through-hole TO-220-2 package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with allowable parameter variations within the same product category.

Substiute Parts

SFAF2004G C0G

Taiwan Semiconductor CorporationIn Stock: 1039SFAF2004G C0G Datasheet

Current PartRFQ

SFAF2004G

Taiwan Semiconductor CorporationIn Stock: 1312SFAF2004G Datasheet

DirectRFQ

SFAF2004GHC0G

Taiwan Semiconductor CorporationIn Stock: 1169SFAF2004GHC0G Datasheet

Parametric EquivalentRFQ

STTH1502FP

STMicroelectronicsIn Stock: 1259STTH1502FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of rectifier diodes is determined by electrical parameter compatibility within the following criteria:

Voltage Rating Compatibility: The DC reverse voltage (Vr) must equal or exceed the main part specification. All identified substitutes maintain the 200 V rating.

Current Rating Compatibility: The average rectified current (Io) must meet or exceed the application requirement. The main part specifies 20 A; substitute parts are evaluated on this basis.

Forward Voltage Characteristics: Forward voltage drop (Vf) at rated current affects power dissipation and thermal performance. Variations are acceptable within standard rectifier diode tolerances.

Recovery Speed Classification: Fast recovery characteristics (≤ 500ns) are maintained across all identified parts, ensuring compatibility in switching applications.

Reverse Leakage Current: Leakage specifications at rated reverse voltage must be equivalent or lower to maintain circuit performance.

Thermal Operating Range: Junction temperature ratings must accommodate the application environment.

Package and Mounting: Through-hole TO-220-2 package compatibility ensures mechanical and thermal interface equivalence.

Regulatory Compliance: RoHS3 compliance and REACH status are maintained across all substitutes.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (SFAF2004G): This part is a direct manufacturer equivalent with identical electrical specifications and active product status. The primary distinction is packaging format (Tube versus unspecified). This part is recommended as the primary replacement for the discontinued SFAF2004G C0G.

Parametric Equivalent (SFAF2004GHC0G): This part maintains all electrical parameters identical to the main part and adds automotive-grade qualification (AEC-Q101). Active product status and ROHS3 compliance are confirmed. This part is suitable for applications requiring automotive-grade components or enhanced reliability documentation.

Similar Substitute (STTH1502FP): This STMicroelectronics part maintains voltage rating, reverse recovery speed, and reverse leakage specifications. The current rating is reduced to 15 A, and forward voltage is specified at 1.1 V versus 975 mV. Maximum junction temperature is elevated to 175°C. This part is suitable only for applications where the 20 A current requirement can be reduced to 15 A or lower, or where higher forward voltage drop is acceptable. Active product status and ROHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can SFAF2004G be directly replaced with SFAF2004GHC0G?

A: Yes. Both parts maintain identical electrical specifications: 200 V reverse voltage, 20 A average rectified current, 975 mV forward voltage at 20 A, and 35 ns reverse recovery time. The SFAF2004GHC0G includes automotive-grade qualification (AEC-Q101), making it suitable for applications requiring enhanced reliability documentation or automotive compliance.

Q: Is STTH1502FP a suitable replacement for SFAF2004G C0G?

A: STTH1502FP is a partial substitute with limitations. It maintains the 200 V voltage rating, fast recovery speed classification, and 10 µA reverse leakage current. However, the average rectified current is reduced to 15 A (versus 20 A), and forward voltage is 1.1 V at 15 A (versus 975 mV at 20 A). This part is suitable only for applications where the circuit can operate at 15 A or lower, or where the higher forward voltage drop is acceptable.

Q: What is the difference between the main part SFAF2004G C0G and the direct equivalent SFAF2004G?

A: The electrical and mechanical specifications are identical. The primary difference is product status: SFAF2004G C0G is discontinued at DiGi Electronics, while SFAF2004G is active. Packaging format differs (unspecified versus Tube), but both use the TO-220-2 Full Pack case.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SFAF2004G, SFAF2004GHC0G, and STTH1502FP are all ROHS3 compliant and REACH unaffected.

Q: Can I use STTH1502FP in a 20 A application?

A: No. STTH1502FP is rated for 15 A average rectified current. Using it in a 20 A application exceeds its current rating and will result in excessive heat generation and potential component failure.

Q: What is the thermal difference between SFAF2004G and STTH1502FP?

A: SFAF2004G has a maximum junction temperature of 150°C, while STTH1502FP is rated to 175°C. The higher thermal rating of STTH1502FP provides additional margin in high-temperature environments, but this does not compensate for the reduced current rating.

Q: Are the forward voltage specifications interchangeable?

A: No. SFAF2004G specifies 975 mV forward voltage at 20 A, while STTH1502FP specifies 1.1 V at 15 A. The higher forward voltage of STTH1502FP results in increased power dissipation and heat generation. Circuit designs dependent on specific forward voltage characteristics must account for this difference.