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Taiwan Semiconductor Corporation HERAF802GH
- Part No.:
- HERAF802GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
HERAF802GH.pdf
- Description:
- 50NS, 8A, 100V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
HERAF802GH from Taiwan Semiconductor is an AEC-Q101-qualified, single-die, glass-passivated high-efficiency rectifier in ITO-220AC package, rated for 100 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 150 A surge capability (IFSM), used in automotive-grade DC-DC converters and freewheeling paths.
For engineers reviewing the HERAF802GH datasheet, HERAF802GH pinout, HERAF802GH application, or HERAF802GH equivalent, key selection factors include its 100 V VRRM, 1.0 V typical forward voltage at 8 A/25°C, 50 ns reverse recovery time, junction-to-case thermal resistance of 2 °C/W, and AEC-Q101 qualification for under-hood power conversion.
Technical Context
This device is a unidirectional silicon planar epitaxial rectifier with glass-passivated junction, optimized for switching-mode power supplies where low conduction loss and fast recovery are critical. It supports continuous 8 A forward current at case temperature up to 115°C and withstands 150 A non-repetitive surge for 8.3 ms.
The HERAF802GH operates across -55°C to +150°C junction temperature range, exhibits 10 µA max reverse leakage at 25°C and 400 µA at 125°C, and delivers 80 pF junction capacitance at 1 MHz/4 V - enabling stable performance in high-frequency flyback and buck-derived topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC output rectification |
| IF | 8 A - continuous average forward current at TC = 115°C; sets thermal design baseline for heatsink sizing |
| IFSM | 150 A - non-repetitive surge current (8.3 ms half-sine); enables robustness against load dump or startup transients |
| VF @ 8 A, 25°C | 1.0 V typ - forward voltage drop; directly determines conduction loss (Pcond ≈ 8 A × 1.0 V = 8 W) |
| trr | 50 ns max - reverse recovery time; limits switching losses and EMI in >100 kHz SMPS designs |
| RθJC | 2 °C/W - junction-to-case thermal resistance; enables accurate thermal modeling when mounted to heatsink |
| AEC-Q101 | Qualified - certified for automotive electronic components per stress test requirements (HTOL, TC, HTRB, etc.) |
Pinout & Package
Package: ITO-220AC - insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, matte tin-plated leads, 1.70 g mass, and polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to switching node or transformer secondary; must handle full 8 A RMS and 150 A surge |
| Cathode (Lead 2) | Output current exit point | Connected to output capacitor or filter inductor; low-inductance layout critical for EMI control |
| Tab (Isolated) | Thermal path only | Electrically isolated metal tab for mechanical mounting and heat dissipation; no electrical connection required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reliability and moisture resistance without hermetic sealing |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial and automotive systems |
| Halogen-free (IEC 61249-2-21) | Meets environmental compliance requirements for RoHS-compliant manufacturing and recycling |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for automotive under-hood longevity |
| Matte tin-plated leads | Ensures reliable solderability per J-STD-002, supporting automated reflow and wave soldering processes |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Power Supplies |
|---|---|
Use Scenario: Step-down conversion in 12 V/48 V dual-battery automotive systems with transient-heavy loads. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck converter, conducting during low-side switch off-time. Use Value: 100 V VRRM and AEC-Q101 qualification ensure reliable operation under load dump (ISO 7637-2 Pulse 5a) and thermal cycling. | Use Scenario: Secondary-side rectification in telecom and server PSUs operating at 100–500 kHz switching frequency. IC Role / Device Role / Timing Role: Freewheeling diode in active-clamp forward or LLC resonant converters. Use Value: 50 ns trr minimizes reverse recovery loss and reduces EMI generation during hard-switching transitions. |
| Freewheeling in Motor Drives | UPS and Inverter Output Stages |
Use Scenario: Inductive energy recirculation in 24 V/48 V BLDC motor gate driver auxiliary supplies. IC Role / Device Role / Timing Role: Clamp diode across MOSFETs or IGBTs to suppress inductive kickback voltage spikes. Use Value: 150 A IFSM withstands high di/dt surges during motor stall or rapid deceleration events. | Use Scenario: Output stage rectification in line-interactive UPS inverters delivering clean 230 V AC sine wave. IC Role / Device Role / Timing Role: High-current output rectifier in full-bridge inverter output filtering stage. Use Value: 2 °C/W RθJC enables efficient thermal coupling to chassis-mounted heatsinks, sustaining 8 A continuous at ambient >70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8L06G | 600 V VRRM, 8 A IF, 65 ns trr, TO-220AC package, not AEC-Q101 qualified | Higher voltage rating suits 400 V bus applications; lacks automotive qualification | Select when higher reverse voltage margin is needed and AEC-Q101 is not required |
| VS-8EWH06FN-M3/45 | 600 V VRRM, 8 A IF, 55 ns trr, ITO-220AC, AEC-Q101 qualified, but VF = 1.35 V typ @ 8 A | Same qualification and package; higher VF increases conduction loss by ~28% vs HERAF802GH | Select when 600 V blocking is mandatory and thermal budget allows higher VF penalty |
Compared with STTH8L06G and VS-8EWH06FN-M3/45, the HERAF802GH offers optimal balance of 100 V rating, 1.0 V VF, 50 ns trr, and AEC-Q101 compliance - making it uniquely suited for cost-sensitive, thermally constrained 12–48 V automotive DC-DC rectification where lower voltage and tighter loss budgets apply.
Availability
HERAF802GH is available at Aetrix Electronics and suitable for automotive power modules, industrial DC-DC converters, and UPS output stages requiring stable component supply with AEC-Q101 assurance and consistent thermal performance.
Supply support for HERAF802GH 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 for industrial and automotive markets.
The HERAF series targets high-reliability, high-efficiency rectification in automotive and industrial power conversion, emphasizing AEC-Q101 qualification, low VF, fast recovery, and robust thermal performance in ITO-220AC packaging.
FAQ
What is the maximum junction temperature rating for HERAF802GH?
The HERAF802GH has a maximum junction temperature (TJ) of +150°C, with operational range from -55°C to +150°C. This rating supports use in under-hood automotive environments and high-ambient industrial enclosures when properly heatsinked using its 2 °C/W RθJC path. Derating curves in the datasheet define usable IF versus case temperature.
Is HERAF802GH pin-compatible with other devices in the HERAF80xG family?
Yes, all HERAF801G through HERAF808G variants - including HERAF802GH - share identical ITO-220AC package dimensions, pinout (anode/cathode/tab), and mechanical mounting interface. Voltage ratings differ only in internal die design; PCB layout and thermal interface remain unchanged across the family.
Does HERAF802GH require a heatsink in standard operation?
HERAF802GH requires a heatsink when conducting 8 A continuously at ambient temperatures above ~45°C, due to its 2 °C/W RθJC and 1.0 V forward drop (≈8 W dissipation). At lower currents or with forced airflow, minimal heatsinking may suffice - thermal simulation using actual board layout and airflow is recommended before final design freeze.
What does the 'H' suffix in HERAF802GH signify?
The 'H' suffix in HERAF802GH explicitly denotes AEC-Q101 qualification, confirming that the device has passed the full suite of stress tests defined in the AEC-Q101 standard for discrete semiconductors - including HTOL, temperature cycling, HTRB, and ESD. This distinguishes it from non-H variants like HERAF802G, which lack automotive qualification.
How does HERAF802GH's reverse recovery time compare to standard FRDs?
HERAF802GH achieves 50 ns maximum reverse recovery time (trr), significantly faster than legacy fast recovery diodes (typically 100–200 ns). This enables higher switching frequencies and lower switching losses in modern SMPS designs, especially in quasi-resonant and active-clamp topologies where diode turn-off behavior critically impacts efficiency and EMI.
HERAF802GH 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):
- 100 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
HERAF802GH FAQ
1.How can I place an order for HERAF802GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HERAF802GH 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 HERAF802GH reliable?
The price and inventory of HERAF802GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HERAF802GH is usually 5 days.
3.What payment methods are accepted for HERAF802GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HERAF802GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HERAF802GH?
HERAF802GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HERAF802GH 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 HERAF802GH?
For technical support, including HERAF802GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HERAF802GH requirements.
6.How does Aetrix verify that HERAF802GH is sourced from the original manufacturer or authorized distributors?
All HERAF802GH 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 HERAF802GH meets industry standards.
7.What is the process for return or replacement of HERAF802GH?
All HERAF802GH units undergo pre-shipment inspection (PSI). If there is an issue with HERAF802GH, 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 HERAF802GH part is unused and in its original packaging.
Return procedure for HERAF802GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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