SF46GHA0G Equivalent & Substitute Parts

Part Overview

The SF46GHA0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 4 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific requirements within the specified parameter ranges.

Substiute Parts

SF46GHA0G

Taiwan Semiconductor CorporationIn Stock: 781SF46GHA0G Datasheet

Current PartRFQ

STTH3R04RL

STMicroelectronicsIn Stock: 2296STTH3R04RL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SF46GHA0G is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Package / Case: DO-201AD, Axial through-hole configuration
• Mounting Type: Through Hole
• Technology: Standard rectifier diode
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 35 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V
• RoHS Status: ROHS3 Compliant
• Regulatory Compliance: REACH Unaffected, ECCN EAR99

Current Rating Consideration: The SF46GHA0G is rated for 4 A average rectified current. Substitute parts with lower current ratings (3 A) operate within the same voltage and package specifications but with reduced current capacity. Such substitutes are applicable only in circuits where the actual operating current does not exceed the substitute part's rating.

Parameter Comparison

Engineering Selection Recommendations

SF46GHA0G (Primary Selection): The SF46GHA0G is the specified component with Active product status, AEC-Q101 automotive qualification, and ROHS3 compliance. This part is suitable for applications requiring 4 A rectification at 400 V with automotive-grade reliability. Current inventory of 735 pieces supports immediate deployment.

STTH3R04RL (Substitute Selection): The STTH3R04RL from STMicroelectronics is a qualified substitute when the SF46GHA0G is unavailable. This part maintains electrical equivalence in voltage rating (400 V), package configuration (DO-201AD axial through-hole), fast recovery characteristics (35 ns trr), and regulatory compliance (ROHS3, REACH Unaffected, EAR99). The STTH3R04RL is suitable for circuits where the average rectified current requirement does not exceed 3 A. The higher maximum junction temperature rating (175°C vs. 150°C) provides additional thermal margin. Current inventory of 2200 pieces ensures supply availability. Both parts are Active status products.

Selection Criteria:

• Use SF46GHA0G when circuit design requires 4 A rectification capacity
• Use STTH3R04RL when circuit design operates at 3 A or below and SF46GHA0G is unavailable
• Both parts satisfy automotive-grade applications with AEC-Q101 or equivalent qualification requirements
• Both parts comply with ROHS3 and REACH regulations

Frequently Asked Questions (FAQ)

Q: Can STTH3R04RL replace SF46GHA0G in all applications?

A: The STTH3R04RL is a substitute only for applications where the average rectified current does not exceed 3 A. The SF46GHA0G is rated for 4 A; the STTH3R04RL is rated for 3 A. Circuit analysis must confirm that actual operating current remains within the 3 A limit of the substitute part.

Q: Are the package dimensions identical between SF46GHA0G and STTH3R04RL?

A: Both parts use the DO-201AD axial through-hole package configuration. Mechanical compatibility for PCB mounting and lead spacing is equivalent.

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

A: The SF46GHA0G has a maximum forward voltage of 1.3 V at 4 A, while the STTH3R04RL has a maximum forward voltage of 1.5 V at 3 A. Forward voltage characteristics are measured at their respective rated currents and are not directly comparable at the same current level.

Q: Do both parts meet automotive qualification standards?

A: The SF46GHA0G carries AEC-Q101 automotive qualification. The STTH3R04RL does not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 certification, the SF46GHA0G is the specified choice.

Q: What is the reverse recovery time for both parts?

A: Both the SF46GHA0G and STTH3R04RL have a reverse recovery time (trr) of 35 ns, classified as fast recovery diodes with switching speed ≤ 500 ns for currents > 200 mA.

Q: Are there any regulatory or compliance differences?

A: Both parts are ROHS3 compliant, REACH Unaffected, and classified under ECCN EAR99. Regulatory compliance is equivalent between the two parts.

Q: What is the maximum junction temperature for each part?

A: The SF46GHA0G operates from -55°C to 150°C junction temperature. The STTH3R04RL has a maximum junction temperature of 175°C, providing 25°C additional thermal headroom.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Both parts use identical DO-201AD axial through-hole packaging and mounting type. Physical PCB layout compatibility is equivalent. Electrical substitution depends on circuit current requirements as specified above.