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Taiwan Semiconductor Corporation SF32G-A
- Part No.:
- SF32G-A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF32G-A.pdf
- Description:
- 35NS, 3A, 100V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:5,187
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Product details
Overview
SF32G-A from Taiwan Semiconductor is a 3A, 100V super fast rectifier diode in DO-201AD package, featuring 0.95V forward voltage at 3A/25°C, 125A surge capability, 35ns reverse recovery time, and 80pF junction capacitance - deployed in DC-DC converters and switching inverters for high-efficiency power conversion.
For engineers reviewing the SF32G-A datasheet, SF32G-A pinout, SF32G-A application, or SF32G-A equivalent, key selection criteria include VRRM=100V, IF=3A, trr=35ns, VF=0.95V, and DO-201AD thermal performance (RθJL=10°C/W) in high-frequency switching power supplies.
Technical Context
This single-die silicon rectifier uses planar epitaxial construction to achieve super-fast recovery (trr ≤35ns), enabling operation in high-frequency SMPS topologies where low switching loss and minimal reverse recovery charge are critical. Its 100V VRRM rating targets mid-voltage industrial and consumer power stages.
The device operates across –55°C to +150°C junction temperature range with 125A non-repetitive surge current handling (8.3ms half-sine), supported by UL 94V-0 molding compound and JESD201 Class 1A whisker-resistant tin-plated leads - ensuring reliability in thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse voltage before breakdown; defines safe operating ceiling in bridge or freewheeling configurations |
| IF | 3 A - continuous average forward current; sets steady-state conduction capacity in power supply output stages |
| trr | 35 ns - reverse recovery time; enables efficient operation up to ~3 MHz switching frequencies with low switching loss |
| VF @ 3A, 25°C | 0.95 V - forward voltage drop; determines conduction loss (2.85W at 3A) and thermal load in linear conduction mode |
| RθJL | 10 °C/W - junction-to-lead thermal resistance; allows direct heatsinking via PCB copper or lead frame for thermal management |
| CJ @ 1MHz, 4V | 80 pF - junction capacitance; impacts high-frequency noise coupling and snubber design in flyback or LLC resonant converters |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or positive bus; blocks reverse voltage up to 100V during off-cycle |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast recovery (trr ≤35ns) | Reduces switching losses and EMI in 100–500 kHz SMPS designs without requiring snubber networks |
| Low VF = 0.95V @ 3A | Minimizes conduction loss (2.85W) and simplifies thermal design in space-constrained 3A output rails |
| DO-201AD with RθJL = 10°C/W | Enables direct thermal path from die to PCB copper or chassis via lead frame - no external heatsink needed below 2.5W |
| 125A IFSM (8.3ms) | Withstands inrush and fault currents in AC-input rectification or motor drive freewheeling paths |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 3A, 12–24V output buck-derived or flyback converters. IC Role / Device Role / Timing Role: Unidirectional current steering and energy transfer during synchronous or diode-rectified switching cycles. Use Value: 0.95V VF and 35ns trr reduce conduction + switching losses, improving efficiency by ≥1.2% vs. standard fast recovery diodes at 200kHz. | Use Scenario: Freewheeling path in 100V-class H-bridge inverters driving solenoids or small BLDC motors. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET dead-time and inductive kickback events. Use Value: 125A IFSM withstands peak inductive surges; 100V VRRM matches common 72–96V bus architectures. |
| AC-DC Adapter Input Bridge Leg | Industrial Power Supply Snubberless Clamping |
Use Scenario: Single leg in full-wave bridge rectifier for universal-input (90–264VAC) 36W adapters. IC Role / Device Role / Timing Role: Converts AC line input to pulsating DC while blocking reverse voltage during negative half-cycles. Use Value: 100V VRRM exceeds peak line voltage (375V) only when used in doubler or voltage-clamped topologies - not recommended for direct 264VAC full-wave; suitable for 115VAC or clamped 230VAC designs. | Use Scenario: Clamp diode in RCD-free flyback snubbers for compact industrial 24V/3A supplies. IC Role / Device Role / Timing Role: Absorbs leakage inductance energy during MOSFET turn-off with minimal voltage overshoot. Use Value: 35ns trr prevents premature conduction during ringing; 80pF CJ stabilizes clamp timing without added capacitor tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S (STMicroelectronics) | VRRM=60V, VF=0.92V@3A, trr=30ns, DO-201AD | Lower voltage rating limits use to ≤42V DC bus; better VF/trr trade-off for low-V applications | Select when operating below 60V and prioritizing lowest conduction + switching loss |
| ES3B (ON Semiconductor) | VRRM=100V, VF=0.95V@3A, trr=35ns, DO-214AA (SMB) | Surface-mount SMB package - requires PCB rework; identical electrical specs but different thermal path | Select for automated SMT assembly where DO-201AD through-hole is incompatible with production flow |
Compared with STTH3L06S and ES3B, the SF32G-A provides identical 100V/3A/35ns performance in through-hole DO-201AD with superior lead-frame thermal resistance (RθJL=10°C/W vs. ~15°C/W for SMB), making it optimal for thermally constrained through-hole power supplies.
Availability
SF32G-A is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for SF32G-A 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 power rectifiers, TVS diodes, and MOSFETs since 1979.
The SF3xG-A series was designed specifically for high-frequency switching power supplies requiring robust surge immunity, low VF, and fast recovery - targeting cost-sensitive industrial, consumer, and computing power applications.
FAQ
What is the maximum junction temperature rating for SF32G-A?
The SF32G-A has a maximum junction temperature (TJ MAX) of +150°C, verified per absolute maximum ratings in the official TSC datasheet Version B2105. This rating allows reliable operation in enclosed power supplies with ambient temperatures up to +85°C when mounted on adequate copper area. Derating curves confirm 3A average current is sustainable up to 100°C case temperature.
Does SF32G-A have halogen-free construction?
Yes, SF32G-A complies with IEC 61249-2-21 for halogen-free materials and is RoHS compliant, as confirmed in the "Features" section of the TSC SF31G-A–SF38G-A datasheet (Version B2105). The molding compound contains no brominated flame retardants or chlorine-based additives.
What is the reverse recovery time (trr) test condition for SF32G-A?
The SF32G-A reverse recovery time is specified as ≤35ns under conditions of IF = 0.5A, IR = 1.0A, and Irr = 0.25A, per the Electrical Specifications table in the TSC datasheet. This standardized test ensures consistent comparison across super fast rectifier families and validates suitability for 200–500 kHz switching topologies.
Is SF32G-A suitable for use in a 230VAC input bridge rectifier?
No - SF32G-A has VRRM = 100V, insufficient for direct 230VAC full-wave rectification (peak voltage ≈325V). It is rated for 115VAC inputs (peak ≈162V) only when used in voltage-doubler or clamped configurations. For universal-input AC-DC, SF35G-A (300V) or higher variants are required.
What packaging options are available for SF32G-A?
SF32G-A is supplied in DO-201AD package with two standard packing formats: 1,250 units per tape-and-reel (standard for automated insertion) and 500 units per ammo box (for manual or low-volume prototyping). Both options feature green compound (G suffix) and comply with J-STD-002 solderability requirements.
SF32G-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF32G-A FAQ
1.How can I place an order for SF32G-A through Aetrix?
Please submit a Request for Quotation (RFQ) for SF32G-A 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 SF32G-A reliable?
The price and inventory of SF32G-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF32G-A is usually 5 days.
3.What payment methods are accepted for SF32G-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF32G-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF32G-A?
SF32G-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF32G-A 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 SF32G-A?
For technical support, including SF32G-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF32G-A requirements.
6.How does Aetrix verify that SF32G-A is sourced from the original manufacturer or authorized distributors?
All SF32G-A 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 SF32G-A meets industry standards.
7.What is the process for return or replacement of SF32G-A?
All SF32G-A units undergo pre-shipment inspection (PSI). If there is an issue with SF32G-A, 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 SF32G-A part is unused and in its original packaging.
Return procedure for SF32G-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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