SF16G A0G Equivalent & Substitute Parts

Part Overview

The SF16G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-204AL (DO-41) through-hole axial package. This component is classified as a fast recovery diode with a reverse recovery time of 35 ns, suitable for applications requiring rapid switching characteristics. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters within the 400 V / 1 A rectifier diode category. Substitutes are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design flexibility permits selection from multiple qualified manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	1.3	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Capacitance @ Vr, F	10	pF @ 4V, 1MHz
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution logic for the SF16G A0G is based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) Maximum: 400 V
Current - Average Rectified (Io): 1 A
Mounting Type: Through Hole
Package / Case: DO-204AL or DO-41 Axial

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse recovery time (trr) and speed classification
Reverse leakage current
Operating temperature range
RoHS and regulatory compliance status

Substitute parts are grouped into two categories:

Parametric Equivalent: FR104G A0G matches all primary electrical specifications and package requirements. This part is a direct functional equivalent with identical voltage and current ratings, though reverse recovery time differs (150 ns versus 35 ns for the main part).

Similar Parts: The 1N4004 series variants from multiple manufacturers (Vishay, Comchip, Diodes Incorporated, Rectron USA, Micro Commercial Co) meet the core 400 V / 1 A specifications and DO-41 package requirements. These parts are classified as standard recovery diodes (>500 ns) rather than fast recovery, representing a functional substitution with different switching characteristics. Variations in forward voltage, reverse leakage, and capacitance are documented for each variant.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ 1A (V)	Speed Classification	trr (ns)	Ir @ 400V (µA)	C @ 4V, 1MHz (pF)	Package	Temp Range (°C)	Status
SF16G A0G	Taiwan Semiconductor	400	1	1.3	Fast Recovery ≤ 500ns	35	5	10	DO-204AL (DO-41)	-55 to 150	Active
FR104G A0G	Taiwan Semiconductor	400	1	1.3	Fast Recovery ≤ 500ns	150	5	10	DO-204AL (DO-41)	-55 to 150	Active
1N4004-E3/54	Vishay General Semiconductor	400	1	1.1	Standard Recovery >500ns	—	5	15	DO-204AL (DO-41)	-55 to 150	Active
1N4004-E3/73	Vishay General Semiconductor	400	1	1.1	Standard Recovery >500ns	—	5	15	DO-204AL (DO-41)	-55 to 150	Active
1N4004-G	Comchip Technology	400	1	1.1	Standard Recovery >500ns	—	5	15	DO-204AL, DO-41	-55 to 150	Active
1N4004-T	Diodes Incorporated	400	1	1.0	Standard Recovery >500ns	—	5	15	DO-204AL, DO-41	-65 to 150	Last Time Buy
1N4004E-E3/54	Vishay General Semiconductor	400	1	1.1	Standard Recovery >500ns	—	5	15	DO-204AL (DO-41)	-55 to 150	Active
1N4004G	Rectron USA	400	1	1.0	Standard Recovery >500ns	—	0.2	15	DO-204AL, DO-41	-65 to 175	Active
1N4004GP-E3/54	Vishay General Semiconductor	400	1	1.1	Standard Recovery >500ns	2000	5	8	DO-204AL (DO-41)	-65 to 175	Active
1N4004GP-E3/73	Vishay General Semiconductor	400	1	1.1	Standard Recovery >500ns	2000	5	8	DO-204AL (DO-41)	-65 to 175	Active
1N4004GP-TP	Micro Commercial Co	400	1	1.1	Standard Recovery >500ns	2000	5	15	DO-204AL, DO-41	-55 to 150	Active

Engineering Selection Recommendations

Parametric Equivalent Selection:

The FR104G A0G from Taiwan Semiconductor Corporation is the parametric equivalent to SF16G A0G. Both parts share identical voltage and current ratings, forward voltage characteristics, and package specifications. The primary difference is reverse recovery time (150 ns versus 35 ns), which places FR104G A0G in the fast recovery category but with slower switching than the main part. This part is suitable for applications where the SF16G A0G is unavailable and fast recovery performance is required. FR104G A0G is in active production status with RoHS3 compliance and MSL 1 rating.

1N4004 Series Standard Recovery Alternatives:

The 1N4004 series variants from Vishay General Semiconductor, Comchip Technology, Diodes Incorporated, Rectron USA, and Micro Commercial Co represent functional substitutes with standard recovery characteristics (>500 ns). These parts meet the 400 V / 1 A core specifications and are available in DO-204AL or DO-41 packages. Selection among these variants depends on:

Product Status: Most 1N4004 variants are in active production. The 1N4004-T from Diodes Incorporated is designated Last Time Buy and should be avoided for new designs.
Temperature Range: Standard variants operate from -55°C to 150°C. The 1N4004G from Rectron USA and 1N4004GP variants from Vishay extend to -65°C to 175°C, providing wider operating margins.
Reverse Leakage: The 1N4004G from Rectron USA specifies 200 nA reverse leakage at 400 V, significantly lower than the 5 µA specification of other variants.
Packaging Format: Cut Tape (CT) and Tape & Reel (TR) formats are available. The 1N4004-E3/73 is supplied in Tape & Box (TB) format.
Compliance and Qualification: The 1N4004G from Rectron USA carries AEC-Q101 automotive qualification, suitable for automotive applications.

Switching Characteristic Considerations:

Applications requiring fast switching performance (trr ≤ 500 ns) should prioritize FR104G A0G. Applications tolerant of standard recovery characteristics (trr >500 ns) can utilize 1N4004 series variants, which offer broader manufacturer availability and extended temperature ranges in some cases.

Regulatory Compliance:

All listed substitute parts are RoHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity ratings, matching the compliance profile of SF16G A0G. REACH status is either unaffected or available upon request for all parts listed.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 1N4004 series diode for the SF16G A0G in my application?

A: Substitution is possible if your application tolerates standard recovery characteristics (>500 ns reverse recovery time). The SF16G A0G is a fast recovery diode (35 ns trr), while 1N4004 series parts are standard recovery devices. If your circuit requires fast switching for noise reduction or efficiency, the FR104G A0G is the preferred substitute. If switching speed is not critical, 1N4004 variants are functionally compatible at the 400 V / 1 A rating.

Q: What is the difference between DO-204AL and DO-41 package designations?

A: DO-204AL and DO-41 refer to the same physical package format—an axial through-hole diode package. DO-204AL is the formal JEDEC designation, while DO-41 is the legacy designation. These terms are used interchangeably in component specifications and are mechanically and electrically identical.

Q: Why does the FR104G A0G have a longer reverse recovery time (150 ns) than the SF16G A0G (35 ns)?

A: Reverse recovery time is determined by the semiconductor junction design and doping profile. Although both parts are classified as fast recovery diodes (≤500 ns), the SF16G A0G achieves faster switching through a more aggressive junction design. The FR104G A0G, with 150 ns recovery time, still qualifies as fast recovery but represents a different design trade-off. For applications where the 35 ns specification is critical, the SF16G A0G should be retained.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference carry RoHS3 compliance certification, matching the environmental compliance profile of the SF16G A0G. All parts also carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: Which substitute part has the lowest forward voltage drop?

A: The 1N4004-T from Diodes Incorporated and 1N4004G from Rectron USA both specify 1.0 V forward voltage at 1 A, compared to 1.1 V for most Vishay variants and 1.3 V for the SF16G A0G. Lower forward voltage reduces power dissipation in rectification applications. However, the 1N4004-T is in Last Time Buy status and should not be selected for new designs.

Q: Can I use the 1N4004GP series (SUPERECTIFIER®) as a direct replacement?

A: The 1N4004GP variants meet the 400 V / 1 A specifications and package requirements. However, they feature extended operating temperature ranges (-65°C to 175°C) and lower capacitance (8 pF versus 10-15 pF in other variants). These characteristics make them suitable substitutes, particularly for applications requiring wider temperature operation. The 1N4004GP series is in active production status.

Q: What is the significance of the reverse leakage current specification?

A: Reverse leakage current (Ir) represents the small current that flows through the diode when reverse-biased. The SF16G A0G specifies 5 µA at 400 V. The 1N4004G from Rectron USA specifies 200 nA, which is significantly lower. Lower reverse leakage is beneficial in high-impedance circuits and precision applications where leakage current could introduce measurement errors or unwanted signal paths.

Q: Should I consider the Rectron USA 1N4004G for automotive applications?

A: The 1N4004G from Rectron USA carries AEC-Q101 automotive qualification, making it suitable for automotive applications. It also features extended temperature range (-65°C to 175°C), lower reverse leakage (200 nA), and is in active production status. If your application requires automotive-grade components, this part is a qualified option.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in Cut Tape (CT), Tape & Reel (TR), and Tape & Box (TB) formats. Cut Tape is suitable for small-quantity assembly and prototyping. Tape & Reel format is standard for high-volume automated assembly. Tape & Box format combines reel packaging with box containment. Selection depends on your assembly process and volume requirements.

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