SF24G Equivalent & Substitute Parts

Part Overview

The SF24G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 2 A average rectified current in a DO-204AC (DO-15) through-hole axial package. This component is classified as Active product status and is ROHS3 compliant. The SF24G operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics with a reverse recovery time of 35 nanoseconds. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 200 V, 2 A rectification capability in the DO-204AC package format.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 2 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Capacitance @ Vr, F	40	pF @ 4V, 1MHz
Package / Case	DO-204AC, DO-15, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SF24G are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents maintain identical or functionally equivalent electrical specifications across all critical parameters: 200 V reverse voltage rating, 2 A average rectified current, 950 mV forward voltage drop at 2 A, fast recovery speed (≤500 ns), DO-204AC through-hole axial package, and -55°C to 150°C operating temperature range. These parts are direct functional replacements with no circuit redesign required.

Similar Parts share the same package format (DO-204AC), voltage rating (200 V), and mounting type (through-hole axial) but differ in one or more electrical parameters, primarily average rectified current rating (1 A or 1.5 A instead of 2 A), forward voltage characteristics, or recovery time specifications. These parts are suitable for applications with lower current requirements or where the specific electrical characteristics are compatible with circuit design margins.

The key parameters determining substitution eligibility are:

Voltage - DC Reverse (Vr) (Max): 200 V
Package / Case: DO-204AC, DO-15, Axial
Mounting Type: Through Hole
Current - Average Rectified (Io): 2 A (for parametric equivalents)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Grade
SF24G	Taiwan Semiconductor	200	2	950 @ 2A	35	5 @ 200V	DO-204AC	-55 to 150	Standard
SF24G A0G	Taiwan Semiconductor	200	2	950 @ 2A	35	5 @ 200V	DO-204AC	-55 to 150	Standard
SF24GH	Taiwan Semiconductor	200	2	950 @ 2A	35	5 @ 200V	DO-204AC	-55 to 150	Automotive (AEC-Q101)
SF2L4G	Taiwan Semiconductor	200	2	950 @ 2A	35	1 @ 200V	DO-204AC	-55 to 150	Standard
SF2L4GH	Taiwan Semiconductor	200	2	950 @ 2A	35	1 @ 200V	DO-204AC	-55 to 150	Automotive (AEC-Q101)
UG2D	Taiwan Semiconductor	200	2	950 @ 2A	25	5 @ 200V	DO-204AC	-55 to 150	Standard
UG2DH	Taiwan Semiconductor	200	2	950 @ 2A	25	5 @ 200V	DO-204AC	-55 to 150	Automotive (AEC-Q101)
1N5059GP-E3/54	Vishay General Semiconductor	200	1	1200 @ 1A	2000	5 @ 200V	DO-204AC	-65 to 175	Standard
1N5393GP-E3/54	Vishay General Semiconductor	200	1.5	1400 @ 1.5A	2000	5 @ 200V	DO-204AC	-65 to 175	Standard
1N5615GP-E3/54	Vishay General Semiconductor	200	1	1200 @ 1A	150	0.5 @ 200V	DO-204AC	-65 to 175	Standard
EGP20D-E3/54	Vishay General Semiconductor	200	2	950 @ 2A	50	5 @ 200V	DO-204AC	-65 to 150	Standard

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement)

SF24G A0G is a parametric equivalent with identical electrical specifications and standard grade classification. This part is suitable for non-automotive applications requiring direct functional replacement with no circuit modifications.

SF24GH is the automotive-qualified variant of SF24G, carrying AEC-Q101 qualification. Selection of SF24GH is required for automotive applications, medical devices, or systems requiring automotive-grade component reliability and traceability.

SF2L4G and SF2L4GH are parametric equivalents with improved reverse leakage current performance (1 µA versus 5 µA at 200 V). These parts are suitable for applications where lower leakage current provides design margin benefits. SF2L4GH includes automotive AEC-Q101 qualification.

UG2D and UG2DH are parametric equivalents with faster reverse recovery time (25 ns versus 35 ns). These parts are suitable for high-frequency switching applications where reduced recovery time improves efficiency. UG2DH includes automotive AEC-Q101 qualification.

Similar Part Selection (Current-Reduced Applications)

1N5059GP-E3/54 and 1N5615GP-E3/54 are rated for 1 A average rectified current. These parts are suitable only for applications with maximum current requirements of 1 A or less. The 1N5615GP-E3/54 offers faster recovery time (150 ns) and lower reverse leakage (500 nA) compared to 1N5059GP-E3/54 (2 µs recovery, 5 µA leakage).

1N5393GP-E3/54 is rated for 1.5 A average rectified current. This part is suitable for applications with maximum current requirements between 1 A and 1.5 A.

EGP20D-E3/54 is a 2 A parametric equivalent from Vishay General Semiconductor with identical voltage and current ratings. This part features 50 ns reverse recovery time and is suitable for direct replacement in non-automotive applications.

All Vishay parts (1N5059GP-E3/54, 1N5393GP-E3/54, 1N5615GP-E3/54, EGP20D-E3/54) operate across -65°C to 175°C, providing extended low-temperature performance compared to Taiwan Semiconductor parts (-55°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can SF24G be replaced with SF24G A0G without circuit modification?

A: Yes. SF24G A0G is a parametric equivalent with identical electrical specifications: 200 V reverse voltage, 2 A average rectified current, 950 mV forward voltage at 2 A, 35 ns reverse recovery time, and DO-204AC through-hole package. No circuit redesign is required.

Q: What is the difference between SF24GH and SF24G?

A: SF24GH is automotive-grade and carries AEC-Q101 qualification. Electrical specifications are identical. SF24GH is required for automotive applications, medical devices, or systems requiring automotive-grade component certification and traceability. Standard-grade SF24G is suitable for industrial and consumer applications.

Q: Can SF24G be replaced with 1N5059GP-E3/54?

A: No. The 1N5059GP-E3/54 is rated for 1 A average rectified current, while SF24G is rated for 2 A. Using a 1 A part in a 2 A application will cause component overheating and failure. The 1N5059GP-E3/54 is suitable only for applications with maximum current requirements of 1 A or less.

Q: What is the advantage of UG2D over SF24G?

A: UG2D has a faster reverse recovery time of 25 ns compared to SF24G at 35 ns. All other electrical parameters are identical. UG2D is suitable for high-frequency switching applications where reduced recovery time improves switching efficiency and reduces electromagnetic interference.

Q: Can SF24G be replaced with EGP20D-E3/54?

A: Yes, for non-automotive applications. EGP20D-E3/54 is a 2 A parametric equivalent with identical voltage and current ratings, 950 mV forward voltage at 2 A, and DO-204AC package. The reverse recovery time is 50 ns (versus 35 ns for SF24G), which is acceptable for most applications. EGP20D-E3/54 operates across -65°C to 175°C, providing extended low-temperature performance.

Q: What does "Fast Recovery ≤500ns, >200mA (Io)" mean?

A: This specification indicates the diode exhibits fast recovery characteristics with reverse recovery time of 500 nanoseconds or less when reverse current exceeds 200 milliamps. Fast recovery diodes are suitable for high-frequency switching applications and power supply circuits where reduced recovery time minimizes switching losses.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed (SF24G, SF24G A0G, SF24GH, SF2L4G, SF2L4GH, UG2D, UG2DH, 1N5059GP-E3/54, 1N5393GP-E3/54, 1N5615GP-E3/54, EGP20D-E3/54) are ROHS3 compliant and REACH unaffected.

Q: What is the difference between SF2L4G and SF24G?

A: SF2L4G has lower reverse leakage current of 1 µA at 200 V compared to SF24G at 5 µA. All other electrical parameters are identical. SF2L4G is suitable for applications where lower leakage current provides design margin benefits, particularly in precision analog circuits or low-power applications.

Q: Can automotive-grade parts (SF24GH, SF2L4GH, UG2DH) be used in non-automotive applications?

A: Yes. Automotive-grade parts meet or exceed the electrical and reliability requirements of standard-grade parts. Automotive-grade parts can be used in any application where standard-grade parts are specified, providing enhanced reliability and traceability.

Q: What is the operating temperature range difference between Taiwan Semiconductor and Vishay parts?

A: Taiwan Semiconductor parts (SF24G series, UG2D series) operate from -55°C to 150°C. Vishay parts (1N5059GP-E3/54, 1N5393GP-E3/54, 1N5615GP-E3/54, EGP20D-E3/54) operate from -65°C to 175°C. Vishay parts provide extended low-temperature performance and higher maximum junction temperature capability.

Q: Is the DO-204AC package the same as DO-15?

A: Yes. DO-204AC and DO-15 are equivalent designations for the same through-hole axial package format. Both terms refer to a two-lead axial component with leads suitable for through-hole PCB mounting.

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