SF17G R0G Equivalent & Substitute Parts

Part Overview

The SF17G R0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 500 V DC reverse voltage and 1 A average rectified current in a DO-204AL (DO-41) axial through-hole package. This part is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	500 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 500 V
Capacitance @ Vr, F	10 pF @ 4 V, 1 MHz
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C to 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SF17G R0G is determined by strict equivalence across all electrical parameters and mechanical form factor. The following criteria establish valid substitutes:

Electrical Equivalence Requirements:

Voltage - DC Reverse (Vr) (Max): 500 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.7 V @ 1 A
Reverse Recovery Time (trr): 35 ns
Current - Reverse Leakage @ Vr: 5 µA @ 500 V
Capacitance @ Vr, F: 10 pF @ 4 V, 1 MHz
Speed Classification: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Mechanical Equivalence Requirements:

Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed below meet these criteria without exception.

Parameter Comparison

Parameter	SF17G R0G (Main)	SF17G	SF17G R1G	SF17GH	SF17GHR1G
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	500 V	500 V	500 V	500 V	500 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 500 V	5 µA @ 500 V	5 µA @ 500 V	5 µA @ 500 V	5 µA @ 500 V
Capacitance @ Vr, F	10 pF @ 4 V, 1 MHz	10 pF @ 4 V, 1 MHz	10 pF @ 4 V, 1 MHz	10 pF @ 4 V, 1 MHz	10 pF @ 4 V, 1 MHz
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Standard	Standard	Standard	Automotive	Automotive
Qualification	None specified	None specified	None specified	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

All listed substitute parts maintain complete electrical and mechanical equivalence to the SF17G R0G. Selection among active alternatives is determined by application requirements and supply chain considerations:

Standard Grade Substitutes (SF17G, SF17G R1G): These parts are direct functional equivalents with active product status. Both maintain identical electrical specifications and RoHS3 compliance. Selection between these variants is based on inventory availability and procurement lead times.

Automotive Grade Substitutes (SF17GH, SF17GHR1G): These parts provide the same electrical and mechanical specifications with additional automotive qualification under AEC-Q101 standard. These variants are suitable for applications requiring automotive-grade component certification. The automotive designation does not alter electrical performance but indicates compliance with automotive industry qualification requirements.

All substitute parts are manufactured by Taiwan Semiconductor Corporation and carry ROHS3 compliance status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can SF17G R0G be directly replaced with SF17G?

A: Yes. The SF17G is a direct electrical and mechanical equivalent. Both parts share identical voltage ratings (500 V), current ratings (1 A), forward voltage characteristics (1.7 V @ 1 A), reverse recovery time (35 ns), and package configuration (DO-204AL axial through-hole). The SF17G is currently active in production, whereas SF17G R0G is discontinued.

Q: What is the difference between standard grade (SF17G, SF17G R1G) and automotive grade (SF17GH, SF17GHR1G) variants?

A: Electrical and mechanical specifications are identical across all variants. Automotive grade parts (SF17GH, SF17GHR1G) carry AEC-Q101 qualification, indicating compliance with automotive industry standards. Standard grade parts (SF17G, SF17G R1G) do not carry this automotive qualification. Selection depends on whether the application requires automotive-grade certification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original SF17G R0G specification.

Q: Can these diodes be used in high-temperature applications?

A: All parts support operating junction temperatures from -55°C to 150°C. This temperature range is identical across all variants and matches the original SF17G R0G specification.

Q: What is the significance of the DO-204AL (DO-41) package designation?

A: DO-204AL and DO-41 are equivalent designations for the same axial through-hole package configuration. All substitute parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Are there any differences in reverse leakage current between variants?

A: No. All variants maintain identical reverse leakage current specifications of 5 µA @ 500 V, ensuring equivalent performance in high-voltage applications.

Q: What is the Moisture Sensitivity Level (MSL) rating?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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