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Taiwan Semiconductor Corporation HS2GAF-T
- Part No.:
- HS2GAF-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
HS2GAF-T.pdf
- Description:
- 50NS, 2A, 400V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
HS2GAF-T from Taiwan Semiconductor is a 400 V, 2 A surface-mount high-efficiency fast recovery rectifier diode in SMAF package, with 1.04 V forward voltage at 2 A / 25°C, 50 ns reverse recovery time (IF = 0.5 A, IR = 1.0 A), and 21 pF junction capacitance - used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the HS2GAF-T datasheet, HS2GAF-T pinout, HS2GAF-T application, or HS2GAF-T equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (RθJL = 15 °C/W), low leakage (<5 µA @ 25°C), and fast trr for high-frequency switching efficiency.
Technical Context
The HS2GAF-T is a single-die, glass-passivated silicon PN junction rectifier optimized for high-speed switching. Its 50 ns reverse recovery time and low 21 pF junction capacitance enable operation in 100–500 kHz SMPS topologies without excessive switching loss.
Designed for surface-mount automated assembly, it features matte tin-plated leads compliant with J-STD-002, moisture sensitivity level 1, and UL 94V-0 molding compound - supporting reflow and wave soldering on standard PCBs with 5 mm × 5 mm Cu pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage; defines usable input range in offline or boost converters |
| IF | 2 A continuous - average forward current rating at TA = 75°C on standard PCB; supports 15–25 W power stages |
| VF @ 2 A, 25°C | 1.04 V (max) - forward conduction loss directly impacts efficiency and thermal rise in high-duty-cycle operation |
| trr | 50 ns - measured at IF = 0.5 A, IR = 1.0 A; enables clean turn-off in hard-switched flyback and forward converters |
| CJ | 21 pF @ 1 MHz, 4 V - low junction capacitance minimizes capacitive coupling and EMI in high-dv/dt environments |
| RθJL | 15 °C/W - junction-to-lead thermal resistance; allows direct heat transfer to PCB copper, enabling compact thermal design |
| IR @ 25°C | <5 µA - low reverse leakage preserves efficiency in high-impedance bias networks and standby modes |
Pinout & Package
Package: SMAF (Surface Mount Axial Flat), JEDEC DO-221AC compliant; molded epoxy case with cathode band marking; 0.035 g weight; RoHS and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential side (e.g., switch node in flyback secondary); requires adequate copper pour for thermal dissipation |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or filter capacitor; polarity reversal causes catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments |
| Low trr (50 ns) | Reduces switching loss and ringing in high-frequency converters, improving efficiency above 200 kHz |
| Moisture sensitivity level 1 | Enables unlimited floor life before reflow; no baking required - simplifies SMT line logistics |
| Junction capacitance = 21 pF | Minimizes displacement current during voltage transients, lowering EMI generation in noise-sensitive applications |
| Matte tin-plated leads | Ensures consistent wetting and void-free solder joints per J-STD-002; compatible with lead-free and SnPb processes |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V–48 V output buck-derived DC-DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Fast-recovery output rectifier handling 200–300 kHz switching frequency with minimal reverse recovery loss. Use Value: 50 ns trr and 1.04 V VF reduce conduction + switching losses, enabling >92% efficiency at full load. | Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Clamp-inductive kickback during MOSFET turn-off; must withstand 400 V reverse surge and recover rapidly. Use Value: 400 V VRRM and 50 ns trr prevent cross-conduction and voltage overshoot, improving system robustness. |
| Freewheeling Diodes | SMPS Output Rectification |
Use Scenario: Inductor current recirculation path in synchronous and non-synchronous buck regulators powering FPGA core rails. IC Role / Device Role / Timing Role: Unidirectional current path during high-side switch off-time; operates in discontinuous conduction mode (DCM). Use Value: Low 21 pF CJ avoids parasitic resonance with gate drivers; 15 °C/W RθJL enables direct thermal coupling to ground plane. | Use Scenario: Primary-side snubber clamp and secondary-side rectification in 65–100 W adapter designs meeting Level VI efficiency standards. IC Role / Device Role / Timing Role: High-speed rectifier in flyback transformer secondary winding; handles 2 A average current with <5 µA leakage at standby. Use Value: 5 µA max IR at 25°C reduces no-load power consumption; glass passivation ensures 10-year field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R04S | 400 V, 2 A, trr = 35 ns, VF = 1.15 V @ 2 A, SMA package (not SMAF) | Slightly faster recovery but higher VF; larger footprint and higher RθJA | Prefer when ultra-low trr outweighs thermal and layout constraints |
| ES2D | 200 V, 2 A, trr = 35 ns, VF = 0.95 V @ 2 A, SMA package | Lower VRRM limits use to sub-200 V circuits; not suitable for 400 V bus applications | Select only for 24–48 V systems where lower VF improves light-load efficiency |
Compared with STTH2R04S and ES2D, the HS2GAF-T delivers balanced performance: 400 V rating matches mid-range SMPS buses, 50 ns trr ensures clean switching, and SMAF package enables tighter board layouts with superior thermal transfer via RθJL = 15 °C/W.
Availability
HS2GAF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, freewheeling diode circuits, and SMPS output rectification requiring stable component supply across industrial, telecom, and consumer power designs.
Supply support for HS2GAF-T 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 diodes, MOSFETs, and power ICs since 1979.
The HS2GAF-T belongs to TSC's HS2xA F-series high-efficiency fast recovery rectifier family, engineered for high-frequency switching power supplies where low trr, controlled VF, and robust thermal performance are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the HS2GAF-T?
The HS2GAF-T has a VRRM rating of 400 V, verified in the official Taiwan Semiconductor datasheet (Version B2103, Page 1). This value defines the highest reverse voltage the device can block repeatedly without breakdown and is strictly assigned to the HS2GAF-T variant - distinct from HS2DAF-T (200 V) and HS2JAF-T (600 V). Operating beyond 400 V risks irreversible avalanche failure.
What is the forward voltage (VF) of the HS2GAF-T at 2 A and 25°C?
The HS2GAF-T exhibits a typical forward voltage of 1.04 V at 2 A and 25°C, with a maximum specified value of 1.40 V under those conditions (Taiwan Semiconductor datasheet, Page 2, Electrical Specifications table). This VF directly determines conduction loss and thermal load in continuous operation - critical for thermal design in enclosed power supplies.
What is the reverse recovery time (trr) test condition for the HS2GAF-T?
The HS2GAF-T reverse recovery time is specified as ≤50 ns under the exact test condition: forward current IF = 0.5 A, reverse current IR = 1.0 A, and reverse recovery current decay rate (Irr) = 0.25 A (Taiwan Semiconductor datasheet, Page 2). This standardized measurement reflects real-world behavior in flyback and forward converter secondary-side switching.
Is the HS2GAF-T RoHS and halogen-free compliant?
Yes, the HS2GAF-T is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet (Version B2103, Page 1). The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated - confirming full compliance for environmentally regulated markets including EU and China RoHS.
What package type does the HS2GAF-T use, and what are its mechanical identifiers?
The HS2GAF-T uses the SMAF (DO-221AC) surface-mount package, identified by its flat axial profile, cathode band marking, and 0.035 g weight. Mechanical drawings confirm lead pitch of 2.3 mm, body length of 4.3 mm, and width of 2.6 mm (Taiwan Semiconductor datasheet, Page 5). The "F" suffix in HS2GAF-T explicitly denotes the SMAF package variant within the HS2xA F-series.
HS2GAF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 21pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
HS2GAF-T FAQ
1.How can I place an order for HS2GAF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for HS2GAF-T 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 HS2GAF-T reliable?
The price and inventory of HS2GAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS2GAF-T is usually 5 days.
3.What payment methods are accepted for HS2GAF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS2GAF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HS2GAF-T?
HS2GAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HS2GAF-T 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 HS2GAF-T?
For technical support, including HS2GAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS2GAF-T requirements.
6.How does Aetrix verify that HS2GAF-T is sourced from the original manufacturer or authorized distributors?
All HS2GAF-T 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 HS2GAF-T meets industry standards.
7.What is the process for return or replacement of HS2GAF-T?
All HS2GAF-T units undergo pre-shipment inspection (PSI). If there is an issue with HS2GAF-T, 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 HS2GAF-T part is unused and in its original packaging.
Return procedure for HS2GAF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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