SF11G-TP Equivalent & Substitute Parts

Part Overview

The SF11G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Equivalent and substitute parts are necessary to support existing applications, maintenance requirements, and legacy system repairs where this diode remains in active use.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SF11G-TP are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 950 mV @ 1 A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial
Operating Temperature - Junction: -55°C ~ 150°C
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Category 1: Standard Industrial Grade Equivalents Parts meeting all primary electrical and mechanical parameters with active product status and standard industrial qualification.

Category 2: Automotive Grade Equivalents Parts meeting all primary electrical and mechanical parameters with automotive qualification (AEC-Q101) and active product status, suitable for applications requiring automotive-grade reliability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr (ns)	Ir @ Vr	Package	Temp Range	Product Status	Grade
SF11G-TP	Micro Commercial Co	50 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 50 V	DO-41	-55°C ~ 150°C	Not For New Designs	Standard
SF11G	Taiwan Semiconductor Corporation	50 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Standard
SF11G R1G	Taiwan Semiconductor Corporation	50 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Standard
SF11GH	Taiwan Semiconductor Corporation	50 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Automotive (AEC-Q101)
SF11GHR1G	Taiwan Semiconductor Corporation	50 V	1 A	950 mV @ 1 A	35 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Automotive (AEC-Q101)
UG1A-E3/54	Vishay General Semiconductor - Diodes Division	50 V	1 A	950 mV @ 1 A	25 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Standard
UG1A-M3/54	Vishay General Semiconductor - Diodes Division	50 V	1 A	950 mV @ 1 A	25 ns	5 µA @ 50 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active	Standard

Engineering Selection Recommendations

For Standard Industrial Applications:

The SF11G and SF11G R1G from Taiwan Semiconductor Corporation are direct parametric equivalents with active product status. Both parts maintain identical electrical specifications to the SF11G-TP, including 50 V reverse voltage rating, 1 A average rectified current, and 35 ns reverse recovery time. These parts are suitable for general-purpose rectification in non-automotive applications.

The UG1A-E3/54 and UG1A-M3/54 from Vishay General Semiconductor are functionally equivalent with improved reverse recovery time (25 ns versus 35 ns), providing enhanced switching performance. Both parts carry active product status and ROHS3 compliance. The UG1A-M3/54 offers lower junction capacitance (7 pF @ 4V, 1MHz) compared to the main part specification.

For Automotive Applications:

The SF11GH and SF11GHR1G from Taiwan Semiconductor Corporation are automotive-grade equivalents qualified to AEC-Q101 standard. These parts maintain all electrical parameters identical to the SF11G-TP while providing automotive-level reliability certification. Selection between SF11GH and SF11GHR1G depends on packaging and tape configuration requirements for automated assembly processes.

Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, matching the regulatory profile of the SF11G-TP.

Frequently Asked Questions (FAQ)

Q: Can the SF11G-TP be directly replaced with any of the listed substitute parts?

A: Yes, all listed substitute parts meet the core electrical and mechanical parameters of the SF11G-TP: 50 V reverse voltage, 1 A average rectified current, 950 mV forward voltage drop at 1 A, through-hole mounting in DO-41 package, and -55°C to 150°C operating temperature range. Physical package dimensions are compatible across all substitutes.

Q: What is the difference between the standard industrial grade and automotive grade substitutes?

A: Automotive grade substitutes (SF11GH, SF11GHR1G) carry AEC-Q101 qualification, indicating compliance with automotive reliability and quality standards. Standard industrial grade substitutes (SF11G, SF11G R1G, UG1A-E3/54, UG1A-M3/54) are suitable for general industrial applications. Selection depends on application requirements and end-use environment.

Q: Are there differences in reverse recovery time among the substitutes?

A: Yes. The SF11G-TP, SF11G, SF11G R1G, SF11GH, and SF11GHR1G all specify 35 ns reverse recovery time. The UG1A-E3/54 and UG1A-M3/54 specify 25 ns reverse recovery time, providing faster switching characteristics. Both specifications fall within the fast recovery classification (≤ 500ns, > 200mA).

Q: What packaging options are available for the substitutes?

A: The SF11G-TP is supplied in Tape & Reel (TR) packaging. Taiwan Semiconductor Corporation substitutes (SF11G, SF11G R1G, SF11GH, SF11GHR1G) are available in standard packaging configurations. Vishay substitutes (UG1A-E3/54, UG1A-M3/54) are supplied in Tape & Reel (TR) packaging, matching the original part's tape configuration.

Q: Do all substitutes maintain the same forward voltage drop?

A: Yes, all substitute parts specify 950 mV maximum forward voltage drop at 1 A, identical to the SF11G-TP. This ensures equivalent circuit performance in rectification applications.

Q: Which substitute offers the best availability?

A: Current inventory levels vary. UG1A-M3/54 shows 1100 pcs in stock, SF11GHR1G shows 895 pcs, UG1A-E3/54 shows 878 pcs, SF11G R1G shows 745 pcs, SF11GH shows 681 pcs, and SF11G shows 648 pcs. Availability should be confirmed with the component supplier for specific procurement timelines.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), matching the regulatory compliance of the SF11G-TP.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message