SF36GHB0G Equivalent & Substitute Parts

Part Overview

The SF36GHB0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Active product status and complies with AEC-Q101 automotive qualification standards. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining functional compatibility within the specified operating envelope.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—

Substitute Part Grouping Explanation

Substitution eligibility for the SF36GHB0G is determined by the following mandatory parameters:

Voltage Rating: DC reverse voltage must equal 400 V
Current Rating: Average rectified current must equal 3 A
Package: DO-201AD axial through-hole configuration
Mounting Type: Through-hole technology
Compliance: RoHS3 compliance and REACH unaffected status

Secondary parameters including forward voltage drop, reverse recovery time, reverse leakage current, and operating temperature range are provided for performance comparison but do not disqualify substitution when primary parameters are met. All identified substitute parts maintain the core electrical and mechanical specifications required for functional equivalence.

Parameter Comparison

Parameter	SF36GHB0G (Taiwan Semiconductor)	1N5404-E3/54 (Vishay)	1N5404-E3/73 (Vishay)	STTH3R04RL (STMicroelectronics)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	1.2 V @ 3 A	1.2 V @ 3 A	1.5 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	35 ns	Not specified	Not specified	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	60 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	Not specified
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150 °C	-50 to 150 °C	-50 to 150 °C	Max 175 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Automotive (AEC-Q101)	Not specified	Not specified	Not specified

Engineering Selection Recommendations

All three substitute parts (1N5404-E3/54, 1N5404-E3/73, and STTH3R04RL) satisfy the mandatory electrical and mechanical requirements for direct substitution with the SF36GHB0G. Each part maintains 400 V reverse voltage rating, 3 A average rectified current capacity, and DO-201AD through-hole package configuration.

1N5404-E3/54 and 1N5404-E3/73: These Vishay components are functionally equivalent with identical voltage and current ratings. Both are Active status products with ROHS3 compliance and REACH unaffected designation. The 1N5404-E3/73 variant offers higher inventory availability (29,092 pcs) compared to 1N5404-E3/54 (1,690 pcs). Forward voltage is 0.1 V lower than the main part, and both employ standard recovery speed classification. Operating temperature range is -50 to 150 °C, which is narrower at the lower bound than the SF36GHB0G (-55 to 150 °C).

STTH3R04RL: This STMicroelectronics part matches the SF36GHB0G in fast recovery speed classification and reverse recovery time (35 ns). Forward voltage is 0.2 V higher than the main part. Operating temperature maximum extends to 175 °C, providing wider thermal headroom. Inventory availability is 2,200 pcs. This part is Active status with ROHS3 compliance and REACH unaffected designation.

Selection between substitutes depends on application-specific requirements for forward voltage characteristics, recovery speed performance, and thermal operating envelope. All parts maintain compliance certifications and Active product status.

Frequently Asked Questions (FAQ)

Q: Can the 1N5404-E3/54 and 1N5404-E3/73 be used interchangeably with the SF36GHB0G?

A: Yes. Both Vishay parts meet the mandatory substitution criteria: 400 V reverse voltage, 3 A average rectified current, and DO-201AD through-hole package. The primary difference is packaging format (Cut Tape for Vishay variants) and inventory quantity. Operating temperature range is -50 to 150 °C versus -55 to 150 °C for the main part, which is acceptable for most applications within the specified range.

Q: What is the difference between fast recovery and standard recovery speed classifications?

A: The SF36GHB0G and STTH3R04RL are classified as fast recovery with reverse recovery time of 35 ns. The 1N5404-E3/54 and 1N5404-E3/73 are standard recovery devices with recovery time exceeding 500 ns. Fast recovery diodes switch more rapidly and generate less switching noise, making them suitable for high-frequency applications. Standard recovery diodes are appropriate for lower-frequency rectification circuits.

Q: Does the forward voltage difference affect circuit performance?

A: Forward voltage variations between parts (1.2 V to 1.5 V @ 3 A) result in different voltage drops across the diode during conduction. The SF36GHB0G specifies 1.3 V, while Vishay parts specify 1.2 V (0.1 V lower) and STTH3R04RL specifies 1.5 V (0.2 V higher). In power supply and rectification circuits, these differences affect efficiency and heat dissipation. Circuit design must account for the selected part's forward voltage characteristics.

Q: Are all substitute parts automotive-qualified?

A: The SF36GHB0G carries AEC-Q101 automotive qualification. The substitute parts (1N5404-E3/54, 1N5404-E3/73, and STTH3R04RL) do not specify automotive grade designation in the provided data. Applications requiring automotive qualification should verify grade compliance with the manufacturer before substitution.

Q: What is the significance of the DO-201AD package specification?

A: DO-201AD is an axial through-hole package with standardized lead spacing and mounting footprint. All identified parts use this identical package, ensuring mechanical compatibility with existing PCB designs and assembly processes. No board redesign or rework is required when substituting between these parts.

Q: How does capacitance specification affect substitution?

A: The SF36GHB0G specifies 60 pF @ 4V, 1MHz, while the Vishay parts specify 30 pF. Capacitance affects high-frequency behavior and switching characteristics. Applications sensitive to junction capacitance effects should evaluate the specific part's performance in the target circuit topology.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: Yes. The SF36GHB0G and all three substitute parts (1N5404-E3/54, 1N5404-E3/73, and STTH3R04RL) are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

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