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Taiwan Semiconductor Corporation HERAF804GH
- Part No.:
- HERAF804GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
HERAF804GH.pdf
- Description:
- 50NS, 8A, 300V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:999
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Product details
Overview
HERAF804GH from Taiwan Semiconductor is an AEC-Q101-qualified, single-die, glass-passivated high-efficiency rectifier in ITO-220AC package, rated for 300 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 150 A surge current (IFSM), used in automotive-grade DC-DC converters and switching inverters.
For engineers reviewing the HERAF804GH datasheet, HERAF804GH pinout, HERAF804GH application, or HERAF804GH equivalent, key selection factors include its 300 V VRRM rating, 1.0 V max forward voltage at 8 A/25°C, 50 ns reverse recovery time, 80 pF junction capacitance, and AEC-Q101 qualification for under-hood automotive power conversion.
Technical Context
This device is a standard recovery silicon rectifier with a single PN junction, optimized for high-current switching-mode power supplies where low conduction loss and fast turn-off are required. Its glass passivation ensures stable performance under thermal cycling and humidity stress.
The HERAF804GH operates with a maximum junction temperature of 150°C and exhibits a junction-to-case thermal resistance of 2°C/W, enabling direct heatsink mounting without isolation pads in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - supports 210 V RMS input in bridge rectifiers for 300 V-class SMPS |
| IF | 8 A - continuous forward current rating at TC = 100°C, suitable for mid-power DC-DC stages |
| IFSM | 150 A - handles 8.3 ms half-sine surges, critical for inrush and fault protection |
| VF (max) | 1.0 V @ 8 A, 25°C - reduces conduction loss to ≤8 W per device at full load |
| trr | 50 ns - limits switching losses and EMI in 100–500 kHz converters |
| CJ | 80 pF @ 1 MHz, 4 V - minimizes capacitive coupling in high-dv/dt gate-drive isolation paths |
| TJ max | 150°C - enables operation in engine bay environments with ambient up to 125°C |
Pinout & Package
Package: ITO-220AC - insulated TO-220 variant with electrically isolated tab, matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to high-side switch node or transformer secondary in flyback/forward topologies |
| Cathode (Lead 2) | Output current exit point | Drives bulk capacitor or output inductor; polarity marked on device body |
| Tab (Case) | Electrically isolated thermal path | Mounts directly to heatsink without insulator; no electrical connection to internal die |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements |
| Glass passivated junction | Prevents moisture-induced leakage and surface degradation during 1000+ hour HAST testing |
| Low VF (≤1.0 V) | Reduces power dissipation by ≥15% vs. legacy 1.2 V rectifiers at 8 A load |
| High IFSM (150 A) | Survives cold-crank and load-dump transients without bond-wire fusing |
| UL Recognized (E-326243) | Meets end-equipment safety certification requirements for industrial and automotive systems |
Applications
| Automotive DC-DC Converters | Industrial Switching Inverters |
|---|---|
Use Scenario: 12 V to 48 V bidirectional converter in 48 V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Primary freewheeling rectifier in synchronous buck-boost stage. Use Value: 300 V VRRM and 150 A IFSM withstand battery transients; 1.0 V VF lowers thermal load on heatsink. | Use Scenario: Output rectification in 3 kW solar microinverter with 600 V DC link. IC Role / Device Role / Timing Role: High-current output diode in full-bridge configuration. Use Value: 50 ns trr reduces switching losses at 100 kHz; 2°C/W RθJC enables compact thermal design. |
| Freewheeling in Motor Drives | UPS Input Rectification |
Use Scenario: Inductive kickback suppression in 750 W BLDC motor gate driver supply. IC Role / Device Role / Timing Role: Freewheeling path for energy recovery during PWM off-time. Use Value: Fast 50 ns recovery prevents voltage overshoot; glass passivation ensures reliability over 10⁶ cycles. | Use Scenario: Input AC-DC stage in line-interactive UPS with 230 V AC input. IC Role / Device Role / Timing Role: Bridge leg diode handling 8 A RMS input current. Use Value: 8 A IF rating sustains continuous operation at 40°C ambient; UL recognition satisfies safety agency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R03G | 300 V VRRM, 8 A IF, 1.15 V VF (max), 60 ns trr, TO-220AC package | No AEC-Q101 qualification; higher VF increases conduction loss by ~1.2 W at 8 A | Preferred for cost-sensitive industrial SMPS where automotive qualification is not required |
| VS-8EWH03FN-M3 | 300 V VRRM, 8 A IF, 0.98 V VF (typ), 45 ns trr, TO-220AC package, AEC-Q101 qualified | Slightly lower VF and faster trr, but 125°C TJ max (vs. 150°C for HERAF804GH) | Selected when tighter switching loss budget is needed and junction temperature stays below 125°C |
Compared with STTH8R03G and VS-8EWH03FN-M3, the HERAF804GH offers the highest junction temperature rating (150°C) and lowest VF among AEC-Q101-qualified 300 V/8 A rectifiers, making it optimal for thermally constrained automotive modules requiring long-term reliability at elevated temperatures.
Availability
HERAF804GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and UPS input rectification requiring stable component supply with AEC-Q101 compliance and long-lifecycle support.
Supply support for HERAF804GH 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, MOSFETs, and IGBTs for automotive and industrial markets.
The HERAF series was designed specifically for high-reliability automotive power conversion, emphasizing AEC-Q101 qualification, glass passivation, and thermal robustness in ITO-220AC packaging for under-hood deployment.
FAQ
What is the maximum junction temperature rating for HERAF804GH?
The HERAF804GH has a maximum junction temperature (TJ max) of 150°C, verified per AEC-Q101 stress testing. This allows reliable operation in engine compartment environments where case temperatures may reach 100–125°C, provided thermal design maintains junction temperature below 150°C. The device's 2°C/W RθJC enables effective heatsinking in compact automotive modules.
Is HERAF804GH pin-compatible with other devices in the HERAF80xG family?
Yes, all HERAF801G through HERAF808G variants-including HERAF804GH-share identical ITO-220AC packaging, pinout, and mechanical footprint. Only VRRM, VF, trr, and CJ differ across the family; this allows drop-in voltage-scaling upgrades without PCB redesign, provided thermal and surge margins remain adequate for the new rating.
Does HERAF804GH require a thermal pad or insulator when mounted to a heatsink?
No, the HERAF804GH uses an ITO-220AC package with an electrically isolated metal tab, so it can be mounted directly to a grounded heatsink without thermal pads or insulators. The tab is not internally connected to either anode or cathode, eliminating need for isolation hardware while maintaining 2°C/W thermal resistance.
What is the reverse recovery time (trr) specification for HERAF804GH?
The HERAF804GH has a maximum reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed across the HERAF801G–HERAF805G subgroup and supports efficient operation in 100–500 kHz switching converters where fast diode turn-off minimizes switching losses and EMI generation.
How does the "H" suffix in HERAF804GH affect its qualification status?
The "H" suffix in HERAF804GH explicitly denotes AEC-Q101 qualification, distinguishing it from non-H variants like HERAF804G. This means HERAF804GH has undergone full stress testing-including HTGB, HTRB, TCT, and UHAST-as defined in AEC-Q101 Rev D, and is approved for use in automotive powertrain, chassis, and body electronics where reliability under harsh conditions is mandatory.
HERAF804GH 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):
- 300 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 @ 300 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
HERAF804GH FAQ
1.How can I place an order for HERAF804GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HERAF804GH 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 HERAF804GH reliable?
The price and inventory of HERAF804GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HERAF804GH is usually 5 days.
3.What payment methods are accepted for HERAF804GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HERAF804GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HERAF804GH?
HERAF804GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HERAF804GH 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 HERAF804GH?
For technical support, including HERAF804GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HERAF804GH requirements.
6.How does Aetrix verify that HERAF804GH is sourced from the original manufacturer or authorized distributors?
All HERAF804GH 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 HERAF804GH meets industry standards.
7.What is the process for return or replacement of HERAF804GH?
All HERAF804GH units undergo pre-shipment inspection (PSI). If there is an issue with HERAF804GH, 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 HERAF804GH part is unused and in its original packaging.
Return procedure for HERAF804GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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