SF10DG-T Equivalent & Substitute Parts

Part Overview

The SF10DG-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 1 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF10DG-T is determined by the following critical parameters:

Mandatory Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package compatibility: DO-41, DO-204AL, or Axial configurations

Acceptable Variation Ranges:

Voltage - Forward (Vf) (Max) @ If: Up to 1.1 V @ 1 A (SF10DG-T specifies 950 mV maximum)
Reverse Recovery Time (trr): Fast recovery (≤500 ns) or standard recovery (>500 ns) both acceptable
Current - Reverse Leakage @ Vr: Up to 10 µA @ 200 V
Operating Temperature - Junction: Minimum -55°C to maximum 150°C

Compliance Requirements:

RoHS3 compliance preferred for new designs
REACH compliance status noted for regulatory tracking

Substitute parts meeting these criteria are grouped by recovery speed classification and package type to facilitate direct replacement or design adaptation.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	trr [ns/µs]	Ir @ 200V [µA]	Package	Tj Range [°C]	Product Status	RoHS
SF10DG-T	Diodes Incorporated	200	1	950	35 ns	10	DO-41	-65 to 150	Obsolete	ROHS3
UG1D-E3/54	Vishay General Semiconductor	200	1	950	25 ns	5	DO-204AL (DO-41)	-55 to 150	Active	ROHS3
1N3611GP-E3/54	Vishay General Semiconductor	200	1	1000	2 µs	1	DO-204AL (DO-41)	-65 to 175	Active	ROHS3
1N3611GP-E3/73	Vishay General Semiconductor	200	1	1000	2 µs	1	DO-204AL (DO-41)	-65 to 175	Active	ROHS3
1N4003-TP	Micro Commercial Co	200	1	1100	2 µs	5	DO-41	-55 to 150	Not For New Designs	ROHS3
1N4003G	Taiwan Semiconductor Corporation	200	1	1000	>500 ns	5	DO-204AL (DO-41)	-55 to 150	Active	ROHS3
1N4003GP-E3/54	Vishay General Semiconductor	200	1	1100	2 µs	5	DO-204AL (DO-41)	-65 to 175	Active	ROHS3
1N4003GP-E3/73	Vishay General Semiconductor	200	1	1100	2 µs	5	DO-204AL (DO-41)	-65 to 175	Active	ROHS3
1N4003RLG	onsemi	200	1	1100	2 µs	10	Axial	-65 to 175	Not For New Designs	ROHS3
1N4383GP-E3/54	Vishay General Semiconductor	200	1	1000	2 µs	5	DO-204AC (DO-15)	-65 to 175	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation for Active Designs:

The UG1D-E3/54 (Vishay General Semiconductor) is the preferred direct substitute for the SF10DG-T. This part maintains identical electrical ratings (200 V, 1 A), operates within the same temperature range (-55°C to 150°C), and is classified as active with ROHS3 compliance. The UG1D-E3/54 features improved reverse recovery time (25 ns versus 35 ns) and lower reverse leakage current (5 µA versus 10 µA), providing enhanced performance characteristics. Package compatibility is confirmed as DO-204AL (DO-41).

Secondary Recommendations:

The 1N3611GP-E3/54 and 1N3611GP-E3/73 (Vishay General Semiconductor, SUPERECTIFIER® series) provide active alternatives with extended operating temperature range (-65°C to 175°C) and superior reverse leakage characteristics (1 µA). These parts accept slightly higher forward voltage (1000 mV versus 950 mV) and employ standard recovery technology (2 µs). Both are ROHS3 compliant and suitable for applications where extended temperature performance is required.

The 1N4003G (Taiwan Semiconductor Corporation) offers an active, ROHS3-compliant alternative in DO-204AL (DO-41) package with standard recovery characteristics. This part is widely available and suitable for general-purpose rectification applications.

Not Recommended for New Designs:

The 1N4003-TP (Micro Commercial Co) and 1N4003RLG (onsemi) are classified as "Not For New Designs" and should be avoided in new product development despite meeting electrical specifications.

Package Consideration:

The 1N4383GP-E3/54 (Vishay General Semiconductor) is electrically equivalent but uses DO-204AC (DO-15) package instead of DO-41. This part is suitable only when PCB layout accommodates the different package footprint.

Frequently Asked Questions (FAQ)

Q: Can the UG1D-E3/54 directly replace the SF10DG-T without circuit modification?

A: Yes. The UG1D-E3/54 maintains identical voltage (200 V) and current (1 A) ratings, operates within compatible temperature ranges, and uses the same DO-41 package. No circuit modification is required.

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

A: The SF10DG-T specifies fast recovery with 35 ns reverse recovery time. The UG1D-E3/54 provides 25 ns recovery time. Standard recovery alternatives (1N3611GP-E3/54, 1N4003 series) exhibit 2 µs recovery time. Recovery speed affects switching performance and EMI characteristics. Fast recovery diodes are preferred in high-frequency switching applications, while standard recovery diodes are suitable for line-frequency rectification.

Q: Are all listed substitutes ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The 1N3611 (Microchip Technology, bulk packaging) is RoHS non-compliant and is not recommended for new designs.

Q: Can I use the 1N4383GP-E3/54 as a substitute despite different package type?

A: The 1N4383GP-E3/54 uses DO-204AC (DO-15) package instead of DO-41. Electrical specifications are compatible, but PCB footprint differs. Substitution is possible only if the circuit board layout can accommodate the different package dimensions and lead spacing.

Q: What is the significance of the -E3/54 and -E3/73 suffixes in Vishay part numbers?

A: These suffixes indicate packaging and tape configuration variants. Both -E3/54 and -E3/73 designations refer to cut tape packaging with different reel specifications. Electrical specifications are identical between these variants.

Q: Why is reverse leakage current important in diode selection?

A: Reverse leakage current affects circuit performance in high-impedance applications and influences power dissipation. The SF10DG-T specifies 10 µA maximum leakage. The UG1D-E3/54 provides 5 µA, while 1N3611 variants provide 1 µA. Lower leakage is beneficial in precision rectification and filtering circuits.

Q: Is the 1N4003 series suitable for replacing the SF10DG-T?

A: The 1N4003 series (1N4003G, 1N4003GP-E3/54, 1N4003GP-E3/73) meets voltage and current requirements and is ROHS3 compliant. However, forward voltage is higher (1100 mV versus 950 mV), which increases power dissipation. The 1N4003 series is suitable for general-purpose rectification but not recommended where forward voltage drop is critical.

Q: What inventory considerations should guide part selection?

A: The UG1D-E3/54 has 2,320 pieces in stock. The 1N3611GP-E3/54 has 20,056 pieces available, providing superior supply security. The 1N4003GP-E3/54 and 1N4003GP-E3/73 each have approximately 6,600 pieces in stock. Inventory levels should be evaluated against production volume and lead-time requirements.

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