SF22G-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The SF22G-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 100V DC reverse voltage and 2A average rectified current in a DO-15 through-hole package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. For applications requiring continued supply or design flexibility, equivalent and substitute parts with identical or superior electrical characteristics are available from active manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	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 @ 100 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-204AC, DO-15, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF22G-TP is determined by strict equivalence in the following electrical parameters:

Voltage Rating: 100V DC reverse voltage (Vr) maximum
Current Rating: 2A average rectified current (Io)
Forward Voltage: 950 mV maximum at 2A forward current
Reverse Leakage: 5 µA at 100V
Speed Classification: Fast recovery diode with reverse recovery time ≤ 500ns for currents > 200mA
Package Compatibility: DO-15 or DO-204AC (equivalent designations) through-hole axial package

All substitute parts listed maintain these core electrical specifications. Variations in reverse recovery time (trr) and junction capacitance do not affect functional substitution within the specified parameter envelope. Packaging designation differences (DO-15 versus DO-204AC) represent the same physical package format.

Parameter Comparison

Parameter	SF22G-TP (Micro Commercial Co)	SF22G A0G (Taiwan Semiconductor)	EGP20B (Fairchild Semiconductor)	EGP20B-E3/54 (Vishay)	EGP20B-E3/73 (Vishay)
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 2 A	950 mV @ 2 A	950 mV @ 2 A	950 mV @ 2 A	950 mV @ 2 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	35 ns	35 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V
Capacitance @ Vr, F	60 pF @ 4V, 1MHz	40 pF @ 4V, 1MHz	70 pF @ 4V, 1MHz	70 pF @ 4V, 1MHz	70 pF @ 4V, 1MHz
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: EGP20B-E3/73 (Vishay General Semiconductor)

The EGP20B-E3/73 is the recommended substitute for the SF22G-TP. This part maintains full electrical equivalence across all critical parameters: 100V reverse voltage, 2A average rectified current, 950mV forward voltage at 2A, and fast recovery characteristics. The EGP20B-E3/73 carries Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Inventory availability is substantial at 42,995 pieces. The part is supplied in Cut Tape packaging and operates across the full temperature range of -65°C to 150°C junction temperature.

Secondary Substitute: EGP20B-E3/54 (Vishay General Semiconductor)

The EGP20B-E3/54 provides identical electrical specifications to the EGP20B-E3/73 with equivalent Active status and ROHS3 compliance. This variant is supplied in Cut Tape format with 3,300 pieces in stock. Selection between EGP20B-E3/54 and EGP20B-E3/73 depends on packaging tape specifications and supply chain requirements.

Tertiary Substitute: EGP20B (Fairchild Semiconductor)

The EGP20B maintains full electrical equivalence with 100V/2A ratings and fast recovery characteristics. This part is supplied in Bulk packaging with 5,300 pieces available. Operating temperature range matches the SF22G-TP at -65°C to 150°C. RoHS compliance status is not specified in available documentation.

Alternative Substitute: SF22G A0G (Taiwan Semiconductor Corporation)

The SF22G A0G is a direct equivalent with identical electrical parameters including 35ns reverse recovery time. This part carries Active product status and ROHS3 compliance with 975 pieces in stock. Operating temperature range is -55°C to 150°C, which is 10°C narrower at the lower bound compared to the SF22G-TP. This part is suitable for applications not requiring the full -65°C minimum junction temperature specification.

Frequently Asked Questions (FAQ)

Q: Can the SF22G-TP be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain the critical electrical specifications: 100V reverse voltage, 2A average rectified current, 950mV forward voltage at 2A, and fast recovery diode characteristics. Direct pin-for-pin replacement is supported in DO-15 through-hole applications.

Q: What is the difference between DO-15 and DO-204AC package designations?

A: DO-15 and DO-204AC are equivalent package designations for the same physical axial through-hole diode package. Both terms refer to the identical mechanical and electrical interface. Substitution between parts labeled with either designation is valid.

Q: Does the difference in reverse recovery time (35ns versus 50ns) affect substitution?

A: No. All substitute parts meet the fast recovery classification of ≤500ns for currents exceeding 200mA. The variation between 35ns and 50ns does not alter functional compatibility within the specified parameter envelope. Both values satisfy the fast recovery requirement.

Q: Why does the SF22G A0G have a narrower operating temperature range (-55°C to 150°C versus -65°C to 150°C)?

A: The SF22G A0G is rated for a minimum junction temperature of -55°C rather than -65°C. This part is suitable for applications operating within the -55°C to 150°C range. Applications requiring operation below -55°C junction temperature must use alternatives such as EGP20B, EGP20B-E3/54, or EGP20B-E3/73.

Q: What is the significance of the "Not For New Designs" status of the SF22G-TP?

A: This designation indicates the SF22G-TP has been discontinued or superseded by the manufacturer. All substitute parts listed carry Active status, indicating current production and long-term availability. New designs should incorporate one of the Active substitute parts.

Q: Are all substitute parts ROHS3 compliant?

A: The EGP20B-E3/73, EGP20B-E3/54, SF22G A0G, and SF22G-TP are confirmed ROHS3 compliant. The EGP20B (Fairchild Semiconductor) does not have RoHS compliance status specified in available documentation. Verify RoHS compliance requirements with the Fairchild part datasheet if regulatory compliance is mandatory.

Q: What packaging formats are available for the substitute parts?

A: EGP20B-E3/73 and EGP20B-E3/54 are supplied in Cut Tape (CT) format. EGP20B is supplied in Bulk format. SF22G A0G packaging format is not specified. Packaging selection depends on assembly process requirements and volume specifications.

Q: Can the SF22G-TP be used interchangeably with the SF22G A0G in all applications?

A: The SF22G A0G is suitable for applications operating within -55°C to 150°C junction temperature. Applications requiring the full -65°C minimum temperature specification of the SF22G-TP must use alternative parts such as EGP20B, EGP20B-E3/54, or EGP20B-E3/73.

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