SF20CG-T Equivalent & Substitute Parts

Part Overview

The SF20CG-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 150 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole axial package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part exhibits fast recovery characteristics with a reverse recovery time of 35 ns, suitable for standard rectification applications requiring moderate current handling at 150 V operation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	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	10	µA @ 150 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
Mounting Type	Through Hole	-
Package / Case	DO-204AC, DO-15, Axial	-
Operating Temperature - Junction	-65°C ~ 150°C	°C
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitute parts for the SF20CG-T are selected based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 150 V (exact match required)
Current - Average Rectified (Io): 2 A (exact match required for direct substitution)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (required)
Mounting Type: Through Hole (required)
Package / Case: DO-204AC, DO-15, or Axial variants (compatible)

Substitute Categories:

MFR Recommended Substitutes (Active Status):

UG2C-E3/54 (Vishay): Exact electrical match at 150 V / 2 A with 25 ns reverse recovery time, DO-204AC (DO-15) package, Tape & Reel packaging
SBYV27-150-E3/54 (Vishay): Exact electrical match at 150 V / 2 A with 15 ns reverse recovery time, DO-204AC (DO-15) package, Cut Tape packaging
EGP20C (Fairchild Semiconductor): Exact electrical match at 150 V / 2 A with 50 ns reverse recovery time, DO-15 package, Bulk packaging
EGP20C-E3/54 (Vishay): Exact electrical match at 150 V / 2 A with 50 ns reverse recovery time, DO-204AC (DO-15) package, Tape & Reel packaging

Higher Current Capability Substitute (Active Status):

MUR415G (onsemi): Upgraded current rating at 150 V / 4 A with 35 ns reverse recovery time, DO-27 Axial package. This part provides higher current capacity while maintaining voltage and speed specifications.

All substitute parts are RoHS3 compliant and carry active product status, ensuring long-term availability and manufacturing support.

Parameter Comparison

Parameter	SF20CG-T	UG2C-E3/54	SBYV27-150-E3/54	EGP20C	EGP20C-E3/54	MUR415G
Manufacturer	Diodes Inc.	Vishay	Vishay	Fairchild	Vishay	onsemi
Voltage - DC Reverse (Vr) (Max)	150 V	150 V	150 V	150 V	150 V	150 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A	4 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 2 A	950 mV @ 2 A	1.07 V @ 3 A	950 mV @ 2 A	950 mV @ 2 A	890 mV @ 4 A
Reverse Recovery Time (trr)	35 ns	25 ns	15 ns	50 ns	50 ns	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V
Speed Classification	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Package / Case	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15	DO-204AC, DO-15	DO-201AA, DO-27
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 175°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS3 Compliance	Compliant	Compliant	Compliant	Not specified	Compliant	Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Specifications):

Select from UG2C-E3/54, SBYV27-150-E3/54, EGP20C, or EGP20C-E3/54 when the application requires exact parameter matching at 150 V / 2 A with fast recovery characteristics. All four parts maintain the same voltage and current ratings as the SF20CG-T. These parts are active products with established manufacturing support and full RoHS3 compliance.

UG2C-E3/54 offers the shortest reverse recovery time at 25 ns in Tape & Reel packaging
SBYV27-150-E3/54 offers the fastest reverse recovery time at 15 ns in Cut Tape packaging
EGP20C and EGP20C-E3/54 maintain 50 ns reverse recovery time with established availability

For Upgraded Current Capacity:

Select MUR415G when the application can accommodate a higher current rating (4 A vs. 2 A) at the same 150 V reverse voltage. This part maintains identical reverse recovery time (35 ns) and provides superior current handling capability. MUR415G operates at an extended temperature range (-65°C to 175°C) and carries active product status with full RoHS3 compliance. Package compatibility requires verification due to DO-27 Axial format versus DO-15 format.

Compliance and Availability:

All recommended substitutes carry active product status, ensuring long-term procurement availability and manufacturing continuity. All parts maintain RoHS3 compliance and EAR99 export classification. Inventory levels across all substitutes exceed 800 pieces, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can UG2C-E3/54 directly replace SF20CG-T in all applications?

A: Yes, UG2C-E3/54 provides direct electrical and mechanical compatibility. Both parts are rated for 150 V reverse voltage and 2 A average rectified current with fast recovery characteristics. The primary difference is packaging format (Tape & Reel vs. bulk) and a faster reverse recovery time (25 ns vs. 35 ns), which is advantageous in switching applications.

Q: What is the difference between EGP20C and EGP20C-E3/54?

A: Both parts are electrically identical at 150 V / 2 A with 50 ns reverse recovery time. The primary difference is packaging: EGP20C is supplied in Bulk format, while EGP20C-E3/54 is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Can MUR415G be used as a drop-in replacement?

A: MUR415G provides electrical compatibility at 150 V with identical reverse recovery time (35 ns). However, the current rating is doubled to 4 A, and the package format changes from DO-15 to DO-27 Axial. Physical board layout verification is required before substitution. The higher current capability makes this part suitable for applications requiring increased current margin.

Q: What are the key parameters that determine substitution compatibility?

A: The critical parameters are voltage rating (150 V), current rating (2 A for direct replacement), speed classification (fast recovery ≤ 500ns), and mounting type (through-hole). Package format (DO-15 vs. DO-204AC) is compatible across all recommended substitutes. Reverse recovery time variations (15 ns to 50 ns) do not prevent substitution but may affect switching performance.

Q: Why do some substitutes show lower reverse leakage current (5 µA vs. 10 µA)?

A: Lower reverse leakage current indicates improved device characteristics and is not a limitation for substitution. All substitute parts meet or exceed the SF20CG-T specification, making them suitable for direct replacement.

Q: Are all substitute parts RoHS3 compliant?

A: All MFR Recommended and Parametric Equivalent substitutes carry RoHS3 compliance certification. This ensures compatibility with modern manufacturing standards and regulatory requirements.

Q: What is the significance of operating temperature range differences?

A: The SF20CG-T operates from -65°C to 150°C. Most substitutes maintain this range, with MUR415G extending to 175°C. For applications operating within -65°C to 150°C, all substitutes are fully compatible. Applications requiring extended temperature operation should select MUR415G.

Q: Can packaging format affect circuit performance?

A: Packaging format (Bulk, Tape & Reel, Cut Tape) affects procurement and assembly processes but does not alter electrical performance. All recommended substitutes in DO-15 or DO-204AC packages are mechanically and electrically interchangeable on the circuit board.

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