SF2L4G A0G Equivalent & Substitute Parts

Part Overview

The SF2L4G A0G 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 a fast recovery diode with a reverse recovery time of 35 nanoseconds, suitable for applications requiring efficient rectification at moderate voltage and current levels. The part is Active in product status, ROHS3 compliant, and carries unlimited moisture sensitivity level classification. Equivalent and substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatible package geometry and thermal operating range.

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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	1	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	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SF2L4G A0G are classified into two categories based on electrical parameter alignment:

Parametric Equivalents maintain identical or superior electrical performance across all critical parameters: 200 V reverse voltage rating, 2 A average rectified current, fast recovery speed classification (≤ 500ns), and compatible DO-204AC through-hole package. These parts are direct functional replacements with no derating required.

Similar Parts share the same 200 V reverse voltage and DO-204AC package but differ in average rectified current rating (1 A or 1.5 A) or recovery time characteristics. These parts are suitable only when circuit design permits operation at reduced current levels or when standard recovery speed is acceptable.

The substitution logic is based strictly on the following parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed 2 A for parametric equivalents; may be lower for similar parts if circuit permits
Package / Case: Must be DO-204AC, DO-15, Axial (through-hole)
Speed Classification: Fast recovery (≤ 500ns) preferred for parametric equivalents
RoHS Status: ROHS3 Compliant required
Moisture Sensitivity Level: MSL 1 (Unlimited) required

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Tj Range [°C]	RoHS
SF2L4G A0G	Taiwan Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	35	1 @ 200 V	-55 to 150	ROHS3
SF24G A0G	Taiwan Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	-55 to 150	ROHS3
SF24G	Taiwan Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	-55 to 150	ROHS3
UG2D-E3/73	Vishay General Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	25	5 @ 200 V	-55 to 150	ROHS3
EGP20D-E3/73	Vishay General Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	50	5 @ 200 V	-65 to 150	ROHS3
EGP20D-E3/54	Vishay General Semiconductor	200	2	950 @ 2 A	Fast Recovery ≤ 500ns	50	5 @ 200 V	-65 to 150	ROHS3
1N5393GP-E3/54	Vishay General Semiconductor	200	1.5	1.4 @ 1.5 A	Standard Recovery > 500ns	2000	5 @ 200 V	-65 to 175	ROHS3
1N5059GP-E3/54	Vishay General Semiconductor	200	1	1.2 @ 1 A	Standard Recovery > 500ns	2000	5 @ 200 V	-65 to 175	ROHS3
1N5615GP-E3/54	Vishay General Semiconductor	200	1	1.2 @ 1 A	Fast Recovery ≤ 500ns	150	0.5 @ 200 V	-65 to 175	ROHS3
GP15D-E3/54	Vishay General Semiconductor	200	1.5	1.1 @ 1.5 A	Standard Recovery > 500ns	3500	5 @ 200 V	-65 to 175	ROHS3

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement)

The following parts are parametric equivalents and provide direct functional replacement for the SF2L4G A0G:

SF24G A0G (Taiwan Semiconductor): Identical electrical specifications with matching 200 V, 2 A, 35 ns recovery time, and -55 to 150°C operating range. Differs only in reverse leakage current (5 µA vs. 1 µA). ROHS3 compliant, MSL 1.
SF24G (Taiwan Semiconductor): Identical to SF24G A0G with matching performance parameters. ROHS3 compliant, MSL 1.
UG2D-E3/73 (Vishay General Semiconductor): Meets all electrical requirements with 200 V, 2 A rating and fast recovery classification. Reverse recovery time of 25 ns is superior to the main part. Operating range -55 to 150°C. ROHS3 compliant, MSL 1.
EGP20D-E3/73 (Vishay General Semiconductor): Meets all electrical requirements with 200 V, 2 A rating and fast recovery classification. Reverse recovery time of 50 ns is within acceptable range. Extended operating range -65 to 150°C. ROHS3 compliant, MSL 1.
EGP20D-E3/54 (Vishay General Semiconductor): Functionally equivalent to EGP20D-E3/73 with identical electrical parameters. ROHS3 compliant, MSL 1.

Similar Part Selection (Conditional Substitution)

The following parts share the 200 V voltage rating and DO-204AC package but operate at reduced current levels or with different recovery characteristics. These are suitable only when circuit design permits operation below 2 A average rectified current:

1N5393GP-E3/54 (Vishay General Semiconductor): 200 V, 1.5 A rating. Standard recovery speed (> 500ns). Extended operating range -65 to 175°C. ROHS3 compliant, MSL 1.
1N5059GP-E3/54 (Vishay General Semiconductor): 200 V, 1 A rating. Standard recovery speed (> 500ns). Extended operating range -65 to 175°C. ROHS3 compliant, MSL 1.
1N5615GP-E3/54 (Vishay General Semiconductor): 200 V, 1 A rating. Fast recovery classification (150 ns). Superior reverse leakage performance (0.5 µA). Extended operating range -65 to 175°C. ROHS3 compliant, MSL 1.
GP15D-E3/54 (Vishay General Semiconductor): 200 V, 1.5 A rating. Standard recovery speed (3.5 µs). Extended operating range -65 to 175°C. ROHS3 compliant, MSL 1.

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) classification, meeting regulatory and environmental requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A or 1.5 A rated diode as a substitute for the SF2L4G A0G (2 A rated)?

A: Only if your circuit design operates at or below the lower current rating. The SF2L4G A0G is rated for 2 A average rectified current. Substituting a 1 A or 1.5 A part requires verification that the actual circuit current does not exceed the substitute part's rating. Using a lower-rated part in a 2 A application will cause thermal stress and premature failure.

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

A: Fast recovery diodes have reverse recovery times ≤ 500 nanoseconds, while standard recovery diodes exceed 500 nanoseconds. The SF2L4G A0G is a fast recovery diode with 35 ns recovery time. Fast recovery diodes are preferred in high-frequency switching applications and power supply circuits. Standard recovery diodes (such as 1N5059GP-E3/54 with 2 µs recovery time) are suitable for lower-frequency rectification but generate more heat during switching transitions.

Q: Are all substitute parts available in the same DO-204AC package?

A: Yes. All substitute parts listed are specified for DO-204AC (DO-15) through-hole axial package. This ensures mechanical and thermal compatibility with existing PCB layouts and mounting hardware. Packaging format (Cut Tape, Tape & Reel) may differ, but the physical component package remains identical.

Q: What does ROHS3 compliance mean for this diode?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, which restricts the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All substitute parts listed are ROHS3 compliant, ensuring compatibility with modern manufacturing and environmental regulations.

Q: Can I substitute the SF2L4G A0G with a part rated for higher voltage (e.g., 400 V)?

A: Yes, from an electrical standpoint. A higher voltage-rated diode (400 V or greater) will function in a 200 V application without risk of reverse breakdown. However, higher voltage ratings typically result in increased capacitance and reverse leakage current, which may affect circuit performance in sensitive applications. Verify that the substitute part's capacitance and leakage specifications are acceptable for your circuit.

Q: What is the significance of reverse leakage current (Ir)?

A: Reverse leakage current is the small current that flows through the diode when reverse-biased. The SF2L4G A0G specifies 1 µA at 200 V. Most substitute parts specify 5 µA, which is acceptable for general-purpose rectification. The 1N5615GP-E3/54 offers superior performance at 0.5 µA. Higher leakage current increases power dissipation and heat generation, particularly in high-voltage or high-temperature applications. For most applications, the difference between 1 µA and 5 µA is negligible.

Q: Is the operating temperature range important for substitution?

A: Yes. The SF2L4G A0G operates from -55°C to 150°C junction temperature. Most Vishay substitute parts extend this range to -65°C to 175°C, providing greater thermal margin. If your application operates near the upper or lower temperature limits, verify that the substitute part's operating range is adequate. Extended temperature range is generally beneficial and does not create compatibility issues.

Q: What does MSL 1 (Unlimited) mean?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has minimal sensitivity to moisture absorption during storage and handling. No special moisture-control packaging or baking procedures are required before soldering. All substitute parts carry MSL 1 classification, ensuring equivalent handling and storage requirements.

Q: Can I mix different substitute parts in the same circuit?

A: Yes, provided all parts meet the circuit's electrical requirements (200 V minimum, 2 A minimum for parametric equivalents). Mixing different manufacturers or part numbers in parallel or series configurations is acceptable from a functional standpoint. However, for consistency and simplified inventory management, using a single part number across a design is recommended.

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