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SF14G A0G Equivalent & Substitute Parts
Part Overview
The SF14G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 1 A average rectified current in a through-hole DO-204AL (DO-41) axial package. This component is classified as a fast recovery diode with a reverse recovery time of 35 nanoseconds, suitable for standard rectification applications requiring rapid switching characteristics.
The SF14G A0G maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are necessary when the original component becomes unavailable, when alternative packaging formats are required, or when design specifications permit operation with equivalent electrical parameters within defined tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) Maximum | 200 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) Maximum @ If | 950 mV @ 1 A | mV |
| Reverse Recovery Time (trr) | 35 | ns |
| Current - Reverse Leakage @ Vr | 5 | µA @ 200 V |
| Capacitance @ Vr, F | 20 | pF @ 4V, 1MHz |
| Operating Temperature - Junction | -55 to 150 | °C |
| Package / Case | DO-204AL, DO-41, Axial | — |
| Mounting Type | Through Hole | — |
| Technology | Standard | — |
Substitute Part Grouping Explanation
Substitution of the SF14G A0G is determined by strict equivalence in the following electrical and mechanical parameters:
Critical Matching Parameters:
- Voltage - DC Reverse (Vr) Maximum: 200 V
- Current - Average Rectified (Io): 1 A
- Package / Case: DO-204AL, DO-41, Axial
- Mounting Type: Through Hole
Acceptable Variation Parameters:
- Voltage - Forward (Vf) Maximum @ If: Substitute parts may operate at forward voltages up to 1.1 V @ 1 A, representing a tolerance band above the SF14G A0G specification of 950 mV @ 1 A
- Reverse Recovery Time (trr): Substitute parts may exhibit recovery times up to 2 microseconds (2000 ns), which is slower than the SF14G A0G fast recovery specification of 35 ns
- Current - Reverse Leakage @ Vr: Substitute parts may exhibit leakage currents up to 5 µA @ 200 V, matching the SF14G A0G specification
- Capacitance @ Vr, F: Substitute parts may range from 8 pF to 20 pF @ 4V, 1MHz
- Operating Temperature - Junction: Substitute parts may operate across ranges from -55°C to 175°C, encompassing the SF14G A0G range of -55°C to 150°C
All substitute parts listed maintain RoHS3 compliance, MSL 1 rating, and REACH unaffected status, ensuring regulatory equivalence with the original component.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [mV] | trr [ns] | Ir @ Vr [µA] | C @ Vr [pF] | Tj Range [°C] | Package | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SF14G A0G | Taiwan Semiconductor Corporation | 200 | 1 | 950 @ 1A | 35 | 5 @ 200V | 20 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003-T | Diodes Incorporated | 200 | 1 | 1000 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -65 to 150 | DO-41 | Last Time Buy |
| 1N3611GP-E3/54 | Vishay General Semiconductor | 200 | 1 | 1000 @ 1A | 2000 | 1 @ 200V | — | -65 to 175 | DO-204AL | Active |
| 1N4003-E3/53 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003-E3/54 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003-E3/73 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003E-E3/54 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003E-E3/73 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | >500 | 5 @ 200V | 15 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003G | Taiwan Semiconductor Corporation | 200 | 1 | 1000 @ 1A | >500 | 5 @ 200V | 10 @ 4V | -55 to 150 | DO-204AL | Active |
| 1N4003GP-E3/54 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | 2000 | 5 @ 200V | 8 @ 4V | -65 to 175 | DO-204AL | Active |
| 1N4003GP-E3/73 | Vishay General Semiconductor | 200 | 1 | 1100 @ 1A | 2000 | 5 @ 200V | 8 @ 4V | -65 to 175 | DO-204AL | Active |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full Compatibility):
The 1N4003-E3/53, 1N4003-E3/54, 1N4003-E3/73, 1N4003E-E3/54, and 1N4003E-E3/73 parts from Vishay General Semiconductor are direct electrical and mechanical equivalents to the SF14G A0G. All maintain 200 V reverse voltage rating, 1 A average rectified current, DO-204AL package format, and through-hole mounting. These parts are Active status with RoHS3 compliance and MSL 1 rating. Forward voltage specification of 1.1 V @ 1 A represents acceptable tolerance variation above the SF14G A0G specification of 950 mV @ 1 A. Operating temperature range of -55°C to 150°C matches the original component.
Secondary Substitutes (Active Status, Extended Temperature Range):
The 1N4003GP-E3/54 and 1N4003GP-E3/73 parts from Vishay General Semiconductor offer extended operating temperature range of -65°C to 175°C, providing additional thermal margin beyond the SF14G A0G specification. These SUPERECTIFIER® series components maintain identical voltage and current ratings with DO-204AL package compatibility. Forward voltage of 1.1 V @ 1 A and reverse leakage of 5 µA @ 200 V remain within acceptable tolerance bands. Reverse recovery time of 2 microseconds represents slower switching compared to the SF14G A0G fast recovery specification of 35 nanoseconds.
Alternative Substitute (Active Status, Taiwan Semiconductor Corporation):
The 1N4003G from Taiwan Semiconductor Corporation provides substitution from the same original manufacturer as the SF14G A0G. This part maintains identical voltage and current ratings, DO-204AL package format, and operating temperature range of -55°C to 150°C. Forward voltage of 1000 mV @ 1 A and reverse leakage of 5 µA @ 200 V are within acceptable tolerance bands. Reverse recovery time specification of greater than 500 nanoseconds indicates standard recovery characteristics.
Transitional Substitute (Last Time Buy Status):
The 1N4003-T from Diodes Incorporated is classified as Last Time Buy status, indicating limited availability and planned discontinuation. This part maintains 200 V reverse voltage and 1 A average rectified current ratings with DO-41 package compatibility. Forward voltage of 1000 mV @ 1 A and reverse leakage of 5 µA @ 200 V are within acceptable tolerance bands. This substitute is suitable only for applications where component availability is confirmed and long-term supply is not required.
Extended Temperature Substitute (Active Status, Vishay SUPERECTIFIER®):
The 1N3611GP-E3/54 from Vishay General Semiconductor offers the widest operating temperature range of -65°C to 175°C with Active product status. This SUPERECTIFIER® series component maintains 200 V reverse voltage and 1 A average rectified current with DO-204AL package compatibility. Forward voltage of 1000 mV @ 1 A and reverse leakage of 1 µA @ 200 V represent improved leakage characteristics. Reverse recovery time of 2 microseconds indicates standard recovery performance.
Frequently Asked Questions (FAQ)
Q: Can the SF14G A0G be directly replaced with any of the listed substitute parts?
A: Direct replacement is possible only when the substitute part maintains identical electrical ratings (200 V reverse voltage, 1 A average rectified current), identical package format (DO-204AL, DO-41, Axial), and identical mounting type (through-hole). All listed substitute parts meet these critical criteria. However, forward voltage tolerance, reverse recovery time, and operating temperature range variations must be evaluated against specific application requirements.
Q: What is the significance of the forward voltage difference between the SF14G A0G (950 mV @ 1 A) and substitute parts (1000-1100 mV @ 1 A)?
A: The forward voltage difference represents the voltage drop across the diode during forward conduction at 1 A current. The SF14G A0G exhibits lower forward voltage (950 mV) compared to most substitute parts (1000-1100 mV). In applications where power dissipation and thermal management are critical, the lower forward voltage of the SF14G A0G may be preferred. However, for general-purpose rectification applications, the forward voltage variation of 50-150 mV is typically acceptable and does not affect circuit functionality.
Q: What does "fast recovery" mean in the SF14G A0G specification, and how does it differ from substitute parts?
A: The SF14G A0G is specified as a fast recovery diode with reverse recovery time (trr) of 35 nanoseconds. This rapid recovery characteristic enables the diode to switch from forward conduction to reverse blocking state very quickly, reducing switching losses and enabling operation at higher frequencies. Most substitute parts exhibit reverse recovery times greater than 500 nanoseconds or 2 microseconds, indicating standard recovery performance. For applications requiring high-frequency switching or low switching losses, the fast recovery characteristic of the SF14G A0G is significant. For standard rectification applications operating at line frequency (50-60 Hz), the recovery time difference is not functionally critical.
Q: Are all substitute parts RoHS3 compliant and REACH unaffected?
A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and REACH unaffected status, matching the regulatory compliance of the SF14G A0G. All parts also maintain MSL 1 (unlimited moisture sensitivity level) rating, indicating no special moisture protection requirements during storage or handling.
Q: What is the difference between DO-204AL and DO-41 package designations?
A: DO-204AL and DO-41 are equivalent package designations for the same through-hole axial diode package format. DO-204AL is the formal JEDEC designation, while DO-41 is the legacy designation. Both refer to identical physical dimensions and pin configurations. Substitute parts specified as either DO-204AL or DO-41 are mechanically and electrically interchangeable in through-hole PCB applications.
Q: Why do some substitute parts have extended operating temperature ranges (-65°C to 175°C) compared to the SF14G A0G (-55°C to 150°C)?
A: Extended operating temperature ranges indicate that substitute parts are qualified for operation across wider temperature extremes. The 1N3611GP-E3/54, 1N4003GP-E3/54, and 1N4003GP-E3/73 parts offer lower minimum junction temperature (-65°C versus -55°C) and higher maximum junction temperature (175°C versus 150°C). These extended ranges provide additional thermal margin for applications operating in extreme environmental conditions. For applications within the SF14G A0G temperature range of -55°C to 150°C, the extended range of substitute parts provides no functional advantage but does not introduce any compatibility issues.
Q: What is the significance of the "Last Time Buy" status for the 1N4003-T?
A: Last Time Buy status indicates that the manufacturer (Diodes Incorporated) has announced planned discontinuation of the 1N4003-T part number. This status means that component availability is limited to existing inventory, and no new production is planned. While the 1N4003-T remains functionally equivalent to the SF14G A0G, its use is recommended only for applications where immediate component availability is confirmed and long-term supply continuity is not required. For new designs or applications requiring sustained component availability, Active status parts such as 1N4003-E3/53, 1N4003-E3/54, or 1N4003G are preferred.
Q: Can the SF14G A0G be used in applications requiring the extended temperature range of substitute parts?
A: No. The SF14G A0G is specified for operating junction temperatures from -55°C to 150°C. Applications requiring operation below -55°C or above 150°C must use substitute parts with extended temperature ranges, such as the 1N3611GP-E3/54, 1N4003GP-E3/54, or 1N4003GP-E3/73. Using the SF14G A0G outside its specified temperature range may result in component failure or unpredictable electrical behavior.
Q: Are there any performance differences between Vishay and Taiwan Semiconductor Corporation substitute parts?
A: Both manufacturers provide equivalent electrical performance for the critical parameters of reverse voltage (200 V), average rectified current (1 A), and package format (DO-204AL). The primary differences are in forward voltage tolerance, reverse recovery time, and operating temperature range. Vishay SUPERECTIFIER® series parts (1N3611GP-E3/54, 1N4003GP-E3/54, 1N4003GP-E3/73) offer extended temperature ranges and lower reverse leakage in some variants. Taiwan Semiconductor Corporation parts (1N4003G) maintain operating temperature range matching the SF14G A0G. Both manufacturers maintain full RoHS3 compliance and equivalent regulatory status.
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