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Taiwan Semiconductor Corporation HERAF1005G
- Part No.:
- HERAF1005G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
HERAF1005G.pdf
- Description:
- DIODE GEN PURP 400V 10A ITO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
HERAF1005G from Taiwan Semiconductor is a 10A, 400V repetitive peak reverse voltage (VRRM) glass-passivated high-efficiency fast recovery rectifier in ITO-220AC package, with forward voltage of 1.3V at 10A/25°C, junction-to-case thermal resistance of 2°C/W, and reverse recovery time of 50ns - used in DC-DC converters and switching inverters.
For engineers reviewing the HERAF1005G datasheet, HERAF1005G pinout, HERAF1005G application, or HERAF1005G equivalent, key selection criteria include its 400V VRRM, 1.3V VF at rated current, 50ns trr, 150A IFSM, and ITO-220AC mechanical compatibility for high-power industrial and automotive-grade power conversion designs.
Technical Context
The HERAF1005G is a single-die, unidirectional silicon rectifier optimized for high-frequency switching applications. Its 50ns reverse recovery time and 80pF junction capacitance at 1MHz/4.0V bias enable low switching loss in SMPS topologies operating up to several hundred kHz.
Thermally, it supports continuous 10A conduction with 2°C/W junction-to-case resistance and operates across –55°C to +150°C junction temperature range. The glass-passivated die and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage; defines usable input voltage headroom in bridge or freewheeling configurations |
| VF @ 10A, 25°C | 1.3 V - forward conduction loss at full rated current; directly impacts conduction efficiency and thermal design |
| trr | 50 ns - fast reverse recovery enables high-frequency operation with reduced switching loss and EMI |
| CJ @ 1MHz, 4.0V | 80 pF - junction capacitance at specified AC bias; affects high-frequency impedance and snubber design |
| IFSM | 150 A - non-repetitive surge rating; determines short-circuit robustness and inrush handling capability |
| RθJC | 2 °C/W - thermal resistance from junction to case; enables accurate heatsink sizing for 10A continuous operation |
Pinout & Package
Package: ITO-220AC - insulated thermoplastic outline with single anode/cathode terminals, UL 94V-0 molding compound, matte tin-plated leads, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or switch node) in freewheeling or output rectification |
| Cathode (Lead 2) | Current exit point during forward conduction | Connected to higher-potential side (e.g., output rail or inductor node); polarity marked on device body |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (50ns) | Enables efficient operation in 100–500 kHz SMPS without excessive switching loss or ringing |
| Glass passivated junction | Improves long-term reliability under humidity, thermal cycling, and high-voltage stress conditions |
| 150A surge rating | Supports transient overloads such as motor startup or capacitor charging without failure |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial and automotive power systems |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Used as secondary-side synchronous or asynchronous rectifier in isolated flyback or forward converters delivering 12–48V outputs at up to 10A. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during transformer reset or inductor discharge phase. Use Value: 1.3V VF minimizes conduction loss; 50ns trr reduces reverse recovery charge and associated switching loss. | Use Scenario: Placed across inductive loads (e.g., motor windings or solenoids) in half-bridge or full-bridge inverters operating at 20–200 kHz. IC Role / Device Role / Timing Role: Provides low-loss path for inductive current decay when high-side or low-side switches turn off. Use Value: 400V VRRM accommodates bus voltages up to 350V DC; 80pF CJ limits capacitive turn-on current spikes. |
| Automotive On-Board Charger (OBC) Auxiliary Supply | Industrial AC-DC Front-End Rectification |
Use Scenario: Rectifies auxiliary 12V/24V supplies derived from main OBC transformer secondaries in AEC-Q101-compliant EV systems. IC Role / Device Role / Timing Role: High-reliability power diode in isolated auxiliary power supply (APS) stage. Use Value: Glass passivation and JESD201 Class 2 whisker compliance ensure longevity under automotive thermal/humidity profiles. | Use Scenario: Used in PFC boost output or post-regulator stages of industrial 3-phase AC-DC supplies requiring 10A continuous conduction. IC Role / Device Role / Timing Role: Main output rectifier handling steady-state load current and line transients. Use Value: 2°C/W RθJC allows direct heatsink mounting for stable 10A operation at 100°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH10R04DJF | 400V VRRM, 1.25V VF @ 10A, 35ns trr, TO-220AC package | Slightly faster recovery but lower surge rating (120A IFSM) | Preferred where ultra-low trr dominates over surge margin |
| VS-10EQ040-M3 | 400V VRRM, 1.35V VF @ 10A, 60ns trr, TO-220AC package | Higher VF, slower trr, but qualified to AEC-Q101 Grade 0 | Selected when extended temperature validation beyond +150°C is required |
Compared with STTH10R04DJF and VS-10EQ040-M3, the HERAF1005G offers balanced performance: mid-range VF and trr, highest IFSM (150A), and ITO-220AC mechanical robustness - making it optimal for cost-sensitive industrial power supplies needing surge resilience and thermal stability.
Availability
HERAF1005G 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 lifecycle support.
Supply support for HERAF1005G 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 devices, and MOSFETs for industrial and automotive markets.
The HERAF1005G belongs to TSC's high-efficiency fast recovery rectifier product line, engineered specifically for high-frequency switching power conversion where low VF, fast trr, and rugged surge capability are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the HERAF1005G?
The HERAF1005G has a VRRM of 400 V, as confirmed in the Absolute Maximum Ratings table for the HERAF1005G row. This rating defines the maximum reverse voltage the device can block repeatedly without breakdown and is validated under standard test conditions per JEDEC standards.
What is the forward voltage drop of the HERAF1005G at 10A and 25°C?
The HERAF1005G exhibits a maximum forward voltage (VF) of 1.3 V at 10A and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss and thermal design in high-current applications.
Does the HERAF1005G have AEC-Q101 qualification?
The base HERAF1005G variant is not AEC-Q101 qualified; only the HERAF1005GH version carries that qualification, as indicated in the Ordering Information section. The HERAF1005G meets industrial reliability standards including JESD201 Class 2 whisker testing and UL Recognition (E-326243).
What is the junction-to-case thermal resistance (RθJC) of the HERAF1005G?
The HERAF1005G has a typical junction-to-case thermal resistance (RθJC) of 2°C/W, as specified in the Thermal Performance table. This value enables precise heatsink sizing for continuous 10A operation and is measured under standardized cold-plate mounting conditions.
What is the reverse recovery time (trr) of the HERAF1005G, and under what test conditions?
The HERAF1005G has a maximum reverse recovery time (trr) of 50 ns, tested at IF = 0.5 A, IR = 1.0 A, and IRR = 0.25 A, per the Electrical Specifications table. This parameter is critical for minimizing switching loss in high-frequency SMPS and inverter designs.
HERAF1005G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
HERAF1005G FAQ
1.How can I place an order for HERAF1005G through Aetrix?
Please submit a Request for Quotation (RFQ) for HERAF1005G 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 HERAF1005G reliable?
The price and inventory of HERAF1005G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HERAF1005G is usually 5 days.
3.What payment methods are accepted for HERAF1005G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HERAF1005G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HERAF1005G?
HERAF1005G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HERAF1005G 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 HERAF1005G?
For technical support, including HERAF1005G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HERAF1005G requirements.
6.How does Aetrix verify that HERAF1005G is sourced from the original manufacturer or authorized distributors?
All HERAF1005G 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 HERAF1005G meets industry standards.
7.What is the process for return or replacement of HERAF1005G?
All HERAF1005G units undergo pre-shipment inspection (PSI). If there is an issue with HERAF1005G, 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 HERAF1005G part is unused and in its original packaging.
Return procedure for HERAF1005G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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