SF61G-AP Equivalent & Substitute Parts

Part Overview

The SF61G-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 6 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Applications requiring this diode specification necessitate identification of equivalent alternatives that maintain electrical and mechanical compatibility while offering active product status or enhanced qualification levels.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	975 mV @ 6 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SF61G-AP are grouped based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 6 A
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
Reverse Recovery Time (trr): 35 ns
Operating Temperature Range: -55°C to 150°C

Parametric Equivalent Classification: Parts matching all critical electrical parameters and package specifications are classified as parametric equivalents. These parts maintain identical voltage, current, and thermal ratings while potentially offering different product status or qualification levels.

Similar Classification: Parts with reduced current ratings (4 A versus 6 A) are classified as similar but not direct equivalents, as they do not meet the full current specification of the original part.

Parameter Comparison

Parameter	SF61G-AP (Micro Commercial Co)	SF41G B0G (Taiwan Semiconductor)	SF61G A0G (Taiwan Semiconductor)	SF61GHA0G (Taiwan Semiconductor)
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	6 A	4 A	6 A	6 A
Voltage - Forward (Vf) (Max) @ If	975 mV @ 6 A	1 V @ 4 A	975 mV @ 6 A	975 mV @ 6 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V
Capacitance @ Vr, F	120 pF @ 4V, 1MHz	100 pF @ 4V, 1MHz	100 pF @ 4V, 1MHz	100 pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Product Status	Not For New Designs	Active	Active	Active
Grade	—	—	—	Automotive
Qualification	—	—	—	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalent Selection (SF61G A0G or SF61GHA0G):

The SF61G A0G and SF61GHA0G from Taiwan Semiconductor Corporation are parametric equivalents to the SF61G-AP, matching all critical electrical specifications: 50 V reverse voltage, 6 A average rectified current, 35 ns reverse recovery time, and DO-201AD axial through-hole package. Both parts maintain identical operating temperature range (-55°C to 150°C) and RoHS3 compliance.

The SF61GHA0G variant includes automotive-grade qualification (AEC-Q101), making it suitable for applications requiring automotive component standards. The SF61G A0G provides an active-status equivalent without automotive qualification.

Similar Part Consideration (SF41G B0G):

The SF41G B0G is classified as a similar part with reduced current rating (4 A versus 6 A). This part is suitable only for applications where the maximum average rectified current requirement does not exceed 4 A. Direct substitution is not appropriate for circuits designed for 6 A operation.

Product Status Impact:

The SF61G-AP carries Not For New Designs status, indicating manufacturer discontinuation. For new circuit designs or production transitions, selection of SF61G A0G or SF61GHA0G is appropriate based on application requirements and qualification needs.

Frequently Asked Questions (FAQ)

Q: Can SF61G A0G directly replace SF61G-AP in existing designs?

A: Yes. The SF61G A0G is a parametric equivalent with identical electrical ratings (50 V, 6 A, 35 ns recovery time) and package specification (DO-201AD axial through-hole). No circuit modifications are required.

Q: What is the difference between SF61G A0G and SF61GHA0G?

A: Both parts are parametric equivalents with identical electrical specifications. The SF61GHA0G includes automotive-grade qualification (AEC-Q101) and is designated for automotive applications. Selection depends on whether automotive qualification is required.

Q: Can SF41G B0G be used as a substitute?

A: SF41G B0G is not a direct equivalent. It has a reduced current rating of 4 A compared to the 6 A specification of SF61G-AP. Use SF41G B0G only in applications where maximum average rectified current does not exceed 4 A.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the DO-201AD axial through-hole package, maintaining identical mechanical compatibility and PCB mounting characteristics.

Q: What compliance certifications apply to these parts?

A: All parts listed (SF61G-AP, SF41G B0G, SF61G A0G, SF61GHA0G) are ROHS3 compliant and REACH unaffected. The SF61GHA0G additionally carries AEC-Q101 automotive qualification.

Q: Are there inventory considerations for part selection?

A: Current inventory levels are: SF61G-AP (1149 pcs), SF41G B0G (790 pcs), SF61G A0G (761 pcs), SF61GHA0G (666 pcs). Availability should be verified at time of procurement.

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