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Taiwan Semiconductor Corporation SFA804G C0G
- Part No.:
- SFA804G C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SFA804G C0G.pdf
- Description:
- DIODE GEN PURP 200V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,509
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Product details
Overview
SFA804G from Taiwan Semiconductor is a single-die super fast rectifier diode in TO-220AC package, rated for 200 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 125 A non-repetitive surge current (IFSM), with 35 ns reverse recovery time (trr) and 0.975 V forward voltage at 8 A/25°C - used in DC-DC converters and freewheeling paths in switching power supplies.
For engineers reviewing the SFA804G datasheet, SFA804G pinout, SFA804G application, or SFA804G equivalent, key selection criteria include its 200 V VRRM, 35 ns trr, TO-220AC thermal resistance (RθJC = 4 °C/W), low 0.975 V VF at full load, and AEC-Q101 qualification option (SFA804GH).
Technical Context
This super fast rectifier employs a planar junction structure optimized for low forward voltage and rapid carrier recombination, enabling high efficiency in high-frequency switching topologies. Its 35 ns reverse recovery time and 100 pF junction capacitance at 1 MHz/4 V support operation up to several hundred kHz without excessive switching loss.
The device operates across -55°C to +150°C junction temperature range and delivers stable performance under surge conditions (125 A, 8.3 ms half-sine), making it suitable for industrial and automotive-grade power conversion where reliability and thermal robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input/output isolation in 24–48 V DC-DC systems with 2× safety margin |
| IF | 8 A continuous - sustains steady-state conduction in medium-power SMPS outputs |
| trr | 35 ns - minimizes reverse recovery loss in 100–500 kHz switching applications |
| VF | 0.975 V @ 8 A, 25°C - reduces conduction loss to ~7.8 W at full load |
| RθJC | 4 °C/W - enables effective heatsinking with standard TO-220 clip-on or bolted heatsinks |
| CJ | 100 pF @ 1 MHz, 4 V - limits capacitive coupling noise in high-dv/dt environments |
Pinout & Package
TO-220AC package: single-ended anode-cathode configuration with isolated tab (cathode-connected tab), matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, 1.80 g mass, and maximum mounting torque of 0.56 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tab (center) | Cathode | Electrically connected to cathode; requires insulating washer if mounted to grounded heatsink |
| Lead 1 (left) | Anode | Main anode terminal; carries full forward current path into device die |
| Lead 2 (right) | No connection | Internal die attach flag only; not electrically functional |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Reduces switching loss and EMI in high-frequency converters (>200 kHz) |
| Low forward voltage (VF = 0.975 V @ 8 A) | Lowers conduction loss by ~15% vs. standard FRDs with comparable rating |
| High surge capability (IFSM = 125 A) | Withstands inrush and fault currents in 48 V telecom and industrial PSUs |
| TO-220AC thermal resistance (RθJC = 4 °C/W) | Enables >6 W dissipation with modest heatsinking (ΔT = 25°C) |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V input, 5–12 V output flyback or forward converters. IC Role / Device Role / Timing Role: Power diode conducting during transformer reset phase; handles continuous 8 A DC output current. Use Value: 0.975 V VF and 35 ns trr jointly reduce total power loss below 9 W, improving efficiency by ≥1.2% over standard FRD alternatives. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-time; clamps inductive kickback. Use Value: 125 A IFSM withstands transient surges from 200 mH+ inductors; 200 V VRRM covers 48 V bus with 4× margin. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | Industrial AC-DC Front-End PFC Clamp |
Use Scenario: Auxiliary 12 V supply derived from main OBC DC link using buck converter. IC Role / Device Role / Timing Role: Output rectifier in high-efficiency synchronous-buck or quasi-resonant flyback stage. Use Value: AEC-Q101 qualified variant (SFA804GH) ensures automotive-grade reliability; 150°C TJMAX supports under-hood thermal environments. | Use Scenario: Clamp diode in active clamp PFC circuits operating at 65–100 kHz. IC Role / Device Role / Timing Role: Fast turn-off prevents shoot-through during clamp capacitor recharge; handles bidirectional energy transfer. Use Value: 100 pF CJ and 35 ns trr minimize timing skew and oscillation risk in high-dv/dt clamp node transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8L06W (STMicroelectronics) | 600 V VRRM, 8 A IF, 60 ns trr, TO-220AC, VF = 1.15 V @ 8 A | Higher voltage rating but slower recovery and higher VF; less efficient at 200 V-class designs | Select when system requires >400 V blocking; avoid if trr < 40 ns is mandatory |
| ES8D (ON Semiconductor) | 200 V VRRM, 8 A IF, 35 ns trr, TO-220AC, VF = 0.92 V @ 8 A, RθJC = 3.5 °C/W | Nearly identical speed and rating; slightly lower VF and better thermal resistance | Preferred for thermally constrained layouts; verify AEC-Q101 availability per batch |
Compared with STTH8L06W and ES8D, the SFA804G offers optimal balance of 200 V rating, 35 ns recovery, and 0.975 V forward drop - delivering lower conduction loss than STTH8L06W and more consistent AEC-Q101 qualification than ES8D across production lots.
Availability
SFA804G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, automotive-grade variants (SFA804GH), and long-term industrial lifecycle support.
Supply support for SFA804G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and automotive markets since 1979.
The SFA804G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification and freewheeling in 100–500 kHz switching power supplies.
FAQ
What is the maximum junction temperature rating for the SFA804G?
The SFA804G has a maximum junction temperature (TJ) of +150°C and a minimum of -55°C, allowing operation in harsh thermal environments such as under-hood automotive modules or enclosed industrial power supplies. This rating is validated per JEDEC standards and applies to both standard and AEC-Q101 qualified SFA804GH variants. Thermal design must maintain case temperature within limits using the specified RθJC = 4 °C/W value.
Is the SFA804G pin-compatible with other devices in the SFA801G–SFA808G series?
Yes, all SFA801G through SFA808G share identical TO-220AC package, pinout, and mechanical footprint - including cathode-connected tab, anode lead, and non-functional flag lead. Voltage ratings differ (50–600 V), but PCB layout, heatsinking, and mounting remain unchanged across the series. The SFA804G can be substituted for any other member without board modification, provided voltage and thermal requirements are met.
Does the SFA804G meet automotive qualification standards?
The base SFA804G is not AEC-Q101 qualified; however, the SFA804GH variant is fully AEC-Q101 qualified and marked with "H" suffix. It undergoes stress testing per AEC-Q101 Rev D, including HTGB, HTRB, and temperature cycling. For automotive applications such as OBC auxiliary supplies or body control modules, specify SFA804GH - the SFA804G itself is intended for industrial and commercial use.
What is the reverse recovery charge (Qrr) specification for the SFA804G?
The SFA804G datasheet does not publish Qrr directly; only trr = 35 ns is specified under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A test conditions. Qrr can be estimated indirectly via trr and di/dt, but no guaranteed maximum or typical Qrr value is provided in the official Taiwan Semiconductor documentation for SFA804G. Designers should rely on measured trr and VF for loss modeling.
How does the SFA804G's forward voltage compare across temperature?
The SFA804G exhibits negative temperature coefficient for VF: at 8 A, VF decreases from 0.975 V at 25°C to approximately 0.82 V at 125°C. This behavior is confirmed in Figure 4 (Typical Forward Characteristics) of the datasheet. While lower VF improves conduction efficiency at high temperature, designers must ensure thermal runaway is prevented in parallel configurations due to current imbalance.
SFA804G C0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 975 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 200 V
- Capacitance @ Vr, F:
- 100pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFA804G C0G FAQ
1.How can I place an order for SFA804G C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFA804G C0G 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 SFA804G C0G reliable?
The price and inventory of SFA804G C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA804G C0G is usually 5 days.
3.What payment methods are accepted for SFA804G C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA804G C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFA804G C0G?
SFA804G C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFA804G C0G 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 SFA804G C0G?
For technical support, including SFA804G C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA804G C0G requirements.
6.How does Aetrix verify that SFA804G C0G is sourced from the original manufacturer or authorized distributors?
All SFA804G C0G 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 SFA804G C0G meets industry standards.
7.What is the process for return or replacement of SFA804G C0G?
All SFA804G C0G units undergo pre-shipment inspection (PSI). If there is an issue with SFA804G C0G, 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 SFA804G C0G part is unused and in its original packaging.
Return procedure for SFA804G C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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