SF36G Equivalent & Substitute Parts

Part Overview

The SF36G 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 is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and thermal operating ranges align with the original specification, enabling direct replacement in circuit applications without design modification.

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
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-
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	-

Substitute Part Grouping Explanation

Substitute parts for the SF36G are grouped into three categories based on electrical and mechanical compatibility:

Parametric Equivalents share identical or near-identical electrical specifications with the SF36G, including voltage rating (400 V), current rating (3 A), package type (DO-201AD), and mounting configuration (through-hole). These parts are direct functional replacements.

Similar Parts maintain the same voltage and current ratings and package configuration but differ in one or more secondary parameters such as recovery time, forward voltage, or reverse leakage current. These parts are compatible for applications where the specific parameter variance does not impact circuit performance.

Cross-Manufacturer Alternatives are produced by different manufacturers and may exhibit variations in recovery time, forward voltage characteristics, or temperature range while maintaining core electrical ratings and mechanical compatibility.

The critical parameters determining substitution eligibility are:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 3 A (or higher)
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]
SF36G	Taiwan Semiconductor Corporation	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	35	5 @ 400 V	DO-201AD	-55 to 150
HER305G	Taiwan Semiconductor Corporation	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	50	10 @ 400 V	DO-201AD	-55 to 150
HER305G A0G	Taiwan Semiconductor Corporation	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	50	10 @ 400 V	DO-201AD	-55 to 150
SF36GH	Taiwan Semiconductor Corporation	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	35	5 @ 400 V	DO-201AD	-55 to 150
1N5404-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 400 V	DO-201AD	-50 to 150
1N5404-E3/73	Vishay General Semiconductor - Diodes Division	400	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 400 V	DO-201AD	-50 to 150
GP30G-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.1 @ 3 A	Standard Recovery >500ns	5000	5 @ 400 V	DO-201AD	-65 to 175
MUR440-E3/54	Vishay General Semiconductor - Diodes Division	400	4	1.28 @ 4 A	Fast Recovery ≤ 500ns	75	10 @ 400 V	DO-201AD	-65 to 175
RGP30G-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	DO-201AD	-65 to 175
RGP30G-E3/73	Vishay General Semiconductor - Diodes Division	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	DO-201AD	-65 to 175

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement)

HER305G and HER305G A0G are parametric equivalents manufactured by Taiwan Semiconductor Corporation with identical voltage and current ratings, package configuration, and operating temperature range. These parts differ only in reverse recovery time (50 ns versus 35 ns) and reverse leakage current (10 µA versus 5 µA), representing acceptable variations for general-purpose rectification applications. Both are ROHS3 compliant and Active product status.

SF36GH is an automotive-grade variant of the SF36G base product, qualified to AEC-Q101 standard. It maintains identical electrical specifications and package configuration as the SF36G. This part is suitable for applications requiring automotive qualification.

Similar Parts (Compatible Substitutes)

1N5404-E3/54 and 1N5404-E3/73 are Vishay General Semiconductor products with matching voltage and current ratings and DO-201AD package. These parts employ standard recovery technology (>500ns) compared to the SF36G fast recovery characteristic (≤500ns). Operating temperature range is -50°C to 150°C, with lower minimum temperature limit. Both are ROHS3 compliant and Active product status.

GP30G-E3/54 is a Vishay SUPERECTIFIER® series part with 400 V, 3 A rating and DO-201AD package. Forward voltage is lower (1.1 V @ 3 A) and operating temperature range extends to -65°C to 175°C. This part employs standard recovery technology with significantly longer recovery time (5 µs).

MUR440-E3/54 is a Vishay General Semiconductor fast recovery diode rated for 400 V and 4 A, exceeding the SF36G current rating. Operating temperature range is -65°C to 175°C. This part is suitable for applications requiring higher current capacity.

RGP30G-E3/54 and RGP30G-E3/73 are Vishay SUPERECTIFIER® series parts with 400 V, 3 A rating and DO-201AD package. These parts feature fast recovery technology (≤500ns) with extended operating temperature range (-65°C to 175°C). Reverse recovery time is 150 ns, longer than the SF36G specification.

Frequently Asked Questions (FAQ)

Q: Can HER305G be used as a direct replacement for SF36G?

A: Yes. HER305G maintains identical voltage (400 V), current (3 A), package (DO-201AD), and operating temperature range (-55°C to 150°C) specifications. Reverse recovery time is 50 ns compared to 35 ns for SF36G, and reverse leakage current is 10 µA compared to 5 µA. These variations are within acceptable limits for general-purpose rectification.

Q: What is the difference between SF36G and SF36GH?

A: SF36GH is an automotive-grade variant of the SF36G qualified to AEC-Q101 standard. Electrical specifications and package configuration are identical. SF36GH is specified for applications requiring automotive qualification.

Q: Can 1N5404-E3/73 replace SF36G in high-frequency applications?

A: 1N5404-E3/73 employs standard recovery technology (>500ns) compared to SF36G fast recovery (≤500ns). In applications where switching speed is critical, the slower recovery characteristic of 1N5404-E3/73 may impact performance. Verify circuit requirements before substitution.

Q: What is the advantage of MUR440-E3/54 over SF36G?

A: MUR440-E3/54 is rated for 4 A average rectified current compared to 3 A for SF36G, providing higher current capacity. Both maintain 400 V voltage rating and DO-201AD package. Operating temperature range extends to -65°C to 175°C. This part is suitable for applications requiring higher current handling.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and Active product status, meeting environmental and regulatory requirements equivalent to the SF36G.

Q: Can GP30G-E3/54 be used in place of SF36G?

A: GP30G-E3/54 maintains 400 V, 3 A rating and DO-201AD package compatibility. However, this part employs standard recovery technology with 5 µs recovery time compared to SF36G fast recovery (35 ns). Forward voltage is lower (1.1 V @ 3 A). Operating temperature range is extended (-65°C to 175°C). Substitution is valid for applications where recovery time is not performance-critical.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in DO-201AD axial through-hole package configuration, maintaining mechanical compatibility with SF36G. Packaging format (Cut Tape or Tape & Reel) may vary by supplier and part number variant.

Q: Is operating temperature range a critical substitution parameter?

A: Operating temperature range should be verified against application requirements. SF36G specifies -55°C to 150°C. Some substitute parts (GP30G-E3/54, MUR440-E3/54, RGP30G-E3/54, RGP30G-E3/73) extend to -65°C to 175°C, providing wider operating margin. Substitutes with narrower range (1N5404 series: -50°C to 150°C) may not be suitable for applications requiring -55°C minimum temperature.

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