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Taiwan Semiconductor Corporation SF18G A0G
- Part No.:
- SF18G A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SF18G A0G.pdf
- Description:
- DIODE GEN PURP 600V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:28
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Product details
Overview
SF18G A0G from Taiwan Semiconductor is a 1A, 600V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 1.70V max forward voltage at 1A/25°C, 35ns reverse recovery time, and 5µA max reverse leakage at 25°C - deployed in high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the SF18G A0G datasheet, SF18G A0G pinout, SF18G A0G application, or SF18G A0G equivalent, key selection criteria include VRRM=600V, trr=35ns, VF=1.70V, TJ(max)=150°C, and DO-41 mechanical compatibility with automated through-hole assembly.
Technical Context
This single-die silicon rectifier uses optimized epitaxial structure and controlled lifetime doping to achieve super fast recovery with low forward conduction loss. Its 35ns trr enables operation in high-frequency SMPS topologies up to 100kHz without excessive switching loss.
The device operates across -55°C to +150°C junction temperature range, with RθJL=20°C/W enabling direct lead-to-PCB thermal transfer. Cathode band polarity marking and pure tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports primary-side rectification in universal-input offline SMPS |
| IF | 1 A continuous - rated for sustained conduction in low-power auxiliary rails |
| trr | 35 ns - minimizes reverse recovery charge (Qrr) in hard-switched flyback and forward converters |
| VF | 1.70 V max at 1A/25°C - balances conduction loss vs. thermal rise in compact layouts |
| IR | 5 µA max at 25°C - ensures low standby power loss in energy-sensitive applications |
| TJ(max) | +150 °C - allows operation in sealed enclosures or high-ambient industrial environments |
| RθJL | 20 °C/W - enables direct thermal path to PCB copper without heatsink in <1W dissipation designs |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode indicated by colored band; leads are pure tin-plated per J-STD-002, UL 94V-0 molded compound, 0.350g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output filter capacitor positive or DC bus rail |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr ≤ 35 ns) | Reduces switching losses and EMI in 50–100 kHz SMPS designs |
| Low VF = 1.70 V max @ 1A | Minimizes I²R conduction loss in space-constrained 1A auxiliary supplies |
| DO-41 mechanical standardization | Enables drop-in replacement and compatibility with legacy wave-solder tooling |
| AEC-Q101 qualification option (SF18GH variant) | Validates robustness for automotive under-hood auxiliary power modules |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and global environmental compliance mandates |
Applications
| DC-DC Converter Auxiliary Rail | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Rectifying 12–24V isolated auxiliary winding in telecom brick DC-DC converters. IC Role / Device Role / Timing Role: Output rectifier handling continuous 1A load with minimal voltage drop. Use Value: 1.70V VF and 35ns trr jointly reduce total power loss below 1.8W at full load, easing thermal design. | Use Scenario: Freewheeling path in 48V input half-bridge inverter driving BLDC motor. IC Role / Device Role / Timing Role: Clamp inductive kickback during high-side switch off-time. Use Value: 600V VRRM withstands reflected transients; 35ns trr prevents cross-conduction in 20–50kHz PWM. |
| Industrial PLC Power Supply | LED Driver Secondary Rectification |
Use Scenario: Input rectification for 24V/1A regulated supply in DIN-rail mounted PLC CPU module. IC Role / Device Role / Timing Role: Primary rectifier converting 36VAC control transformer output. Use Value: 150°C TJ(max) and RθJL=20°C/W allow reliable operation inside sealed metal enclosure at 70°C ambient. | Use Scenario: Secondary-side rectification in isolated 36W constant-current LED driver. IC Role / Device Role / Timing Role: High-frequency output rectifier synchronized with quasi-resonant flyback controller. Use Value: Low 5µA IR at 25°C and 100µA at 125°C maintains efficiency >89% over full operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U (STMicroelectronics) | VRRM=600V, IF=1A, trr=30ns, VF=1.7V - slightly faster recovery but same VF envelope | DO-41 package, identical pinout; requires requalification for AEC-Q101 if used in automotive | Preferred where <30ns trr is critical; no layout change needed |
| ES1J (ON Semiconductor) | VRRM=600V, IF=1A, trr=35ns, VF=1.7V - matches SF18G A0G trr and VF, but TJ(max)=150°C same | DO-41, same marking polarity; RoHS/halogen-free status verified per datasheet revision 2023 | Drop-in alternative with identical thermal and electrical behavior in non-automotive industrial use |
Compared with STTH1R06U and ES1J, SF18G A0G offers identical 600V/1A/35ns/1.7V specs and DO-41 form factor, but only SF18GH (not A0G) carries AEC-Q101 qualification - making SF18G A0G optimal for cost-sensitive industrial power supplies where automotive validation is unnecessary.
Availability
SF18G A0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial PLC power supplies requiring stable component supply with consistent DO-41 lead-form geometry and tape-and-reel or ammo-box packaging options.
Supply support for SF18G A0G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS, MOSFETs, and bipolar transistors since 1979.
SF18G A0G belongs to TSC's SFxxG super fast rectifier family, engineered for high-frequency switching power conversion where low trr and controlled VF trade-offs optimize efficiency in compact 1A-class power stages.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of SF18G A0G?
The SF18G A0G has a VRRM rating of 600 V, meaning it can block up to 600 volts of reverse voltage repeatedly without breakdown. This makes SF18G A0G suitable for primary-side rectification in offline 230VAC-derived supplies and high-voltage DC bus clamping. The rating is validated per JEDEC test conditions and applies across the full -55°C to +150°C junction temperature range.
Does SF18G A0G have AEC-Q101 qualification?
No, SF18G A0G is not AEC-Q101 qualified. Only the SF18GH variant (with "H" suffix) meets AEC-Q101 stress test requirements for automotive under-hood applications. SF18G A0G is intended for industrial, telecom, and consumer power supplies where automotive qualification is not required. Always verify part marking and ordering code before deployment in automotive systems.
What is the forward voltage (VF) specification for SF18G A0G at rated current?
SF18G A0G specifies a maximum forward voltage of 1.70 V at IF = 1 A and TJ = 25°C, measured under pulsed conditions (PW = 0.3 ms). At higher junction temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but system-level thermal design must ensure average power dissipation stays within limits defined by RθJL = 20°C/W.
What package type does SF18G A0G use, and what are its key mechanical features?
SF18G A0G uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability, cathode polarity marked by a visible band, and a typical weight of 0.350 g. Lead spacing and body dimensions conform strictly to JEDEC DO-41 standards.
How does the reverse recovery time (trr) of SF18G A0G impact switching converter performance?
SF18G A0G has a trr of 35 ns (max), measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This fast recovery reduces reverse recovery charge (Qrr), minimizing switching losses and voltage overshoot during turn-off in hard-switched topologies like flyback and forward converters operating up to 100 kHz. Lower Qrr also eases EMI filter design compared to standard recovery diodes.
SF18G A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF18G A0G FAQ
1.How can I place an order for SF18G A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF18G A0G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SF18G A0G reliable?
The price and inventory of SF18G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF18G A0G is usually 5 days.
3.What payment methods are accepted for SF18G A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF18G A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF18G A0G?
SF18G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF18G A0G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SF18G A0G?
For technical support, including SF18G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF18G A0G requirements.
6.How does Aetrix verify that SF18G A0G is sourced from the original manufacturer or authorized distributors?
All SF18G A0G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SF18G A0G meets industry standards.
7.What is the process for return or replacement of SF18G A0G?
All SF18G A0G units undergo pre-shipment inspection (PSI). If there is an issue with SF18G A0G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SF18G A0G part is unused and in its original packaging.
Return procedure for SF18G A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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