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Taiwan Semiconductor Corporation HERA804G C0G
- Part No.:
- HERA804G C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
HERA804G C0G.pdf
- Description:
- DIODE GEN PURP 300V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,162
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Product details
Overview
HERA804G from Taiwan Semiconductor is an 8A, 300V glass-passivated high-efficiency rectifier diode in TO-220AC package, featuring VF ≤ 1.0 V at 8A/25°C, IFSM = 150 A, TJ(max) = 150°C, and trr ≤ 50 ns - deployed in DC-DC converters and switching-mode inverters.
For engineers reviewing the HERA804G datasheet, HERA804G pinout, HERA804G application, or HERA804G equivalent, key selection criteria include peak reverse voltage (300 V), forward voltage drop at rated current, surge capability (150 A), thermal resistance (2°C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This single-die, unidirectional silicon rectifier uses a glass-passivated junction to achieve low conduction loss and high surge robustness. Its 300 V VRRM rating and 50 ns reverse recovery time support high-frequency switching topologies with minimal switching loss.
The device operates across -55°C to +150°C junction temperature range and delivers stable performance under repetitive surge conditions per JESD201 Class 2 whisker testing. Thermal resistance of 2°C/W enables efficient heat transfer to heatsinks in power-conversion modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - maximum non-repetitive reverse voltage before breakdown; defines safe operating limit in flyback or boost converter output stages |
| IF | 8 A - continuous average forward current; supports sustained power delivery in 100–300 W SMPS designs |
| VF | ≤ 1.0 V @ 8 A, 25°C - low conduction loss reduces thermal stress and improves system efficiency |
| IFSM | 150 A - peak non-repetitive surge current handling; withstands inrush and fault transients without failure |
| trr | ≤ 50 ns - fast recovery minimizes reverse recovery charge and switching losses in >100 kHz converters |
| RθJC | 2°C/W - enables direct mounting to heatsink for thermal management in compact industrial power supplies |
| TJ(max) | +150°C - extended junction temperature rating allows operation in high-ambient environments like engine bays |
Pinout & Package
Package: TO-220AC - three-terminal, through-hole, single-diode configuration with isolated tab (cathode-connected case). Matte tin-plated leads meet J-STD-002 solderability; mounting torque ≤ 0.56 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side of rectification path; requires PCB trace sizing for 8 A continuous current |
| Cathode | Forward current exit point & case connection | Electrically tied to metal tab; must be electrically isolated from chassis unless used as common return |
| Tab (Case) | Thermal path & cathode terminal | Serves dual role: mechanical heatsink interface and cathode node; requires insulating washer if mounted to grounded chassis |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances moisture resistance and long-term reliability under thermal cycling and humid environments |
| AEC-Q101 qualified option (HERA804GH) | Validated for automotive powertrain and body electronics applications requiring zero-defect reliability |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for safety-critical industrial and medical auxiliary power supplies |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth on leads during long-term storage or high-temperature operation |
| Halogen-free per IEC 61249-2-21 | Complies with environmental regulations for RoHS-compliant end equipment manufacturing |
Applications
| DC-DC Converter Output Stage | Switching Inverter Freewheeling Path |
|---|---|
Use Scenario: Secondary-side rectification in isolated 200–300 W flyback or forward converters powering telecom or server PSUs. IC Role / Device Role / Timing Role: High-current unidirectional conduction element converting transformer AC output to regulated DC bus. Use Value: Low VF (≤1.0 V) reduces conduction loss by ~15% vs. standard FRDs, improving full-load efficiency by up to 0.8%. | Use Scenario: Freewheeling path in 3-phase IGBT-based motor drives operating at 10–20 kHz switching frequency. IC Role / Device Role / Timing Role: Clamp-inductive energy during IGBT turn-off; recirculates current to maintain continuity. Use Value: 50 ns trr limits reverse recovery charge (Qrr), reducing voltage overshoot and EMI generation during commutation. |
| Automotive On-Board Charger (OBC) Rectifier | Industrial UPS Battery Charging Circuit |
Use Scenario: AC/DC front-end rectification in bidirectional OBCs for EVs, handling 6.6 kW PFC + LLC stages. IC Role / Device Role / Timing Role: Input bridge or secondary synchronous rectifier replacement in high-reliability automotive power systems. Use Value: AEC-Q101 qualification (HERA804GH variant) ensures compliance with automotive functional safety requirements. | Use Scenario: Bulk rectification in line-interactive UPS units charging 48 V battery banks under variable load and grid conditions. IC Role / Device Role / Timing Role: Main AC-to-DC conversion stage delivering 8 A continuous current with surge tolerance for brownout recovery. Use Value: 150 A IFSM withstands repeated 10-cycle surges during utility restoration, extending service life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-8EWH03FN-M3 | Same TO-220AC package, 300 V VRRM, but VF = 1.15 V @ 8 A; trr = 45 ns; no AEC-Q101 option | Lower efficiency at high ambient; not certified for automotive use | Select when cost sensitivity outweighs AEC-Q101 need and thermal margin permits higher VF |
| ON Semiconductor MUR830 | 300 V VRRM, VF = 1.25 V @ 8 A, trr = 75 ns, RθJC = 2.5°C/W; AEC-Q101 not available | Higher conduction and switching losses; reduced thermal headroom | Choose only for legacy designs where footprint compatibility is critical and efficiency targets are relaxed |
Compared with VS-8EWH03FN-M3 and MUR830, HERA804G offers lower forward voltage and AEC-Q101 qualification - making it preferred for thermally constrained or automotive-grade 300 V rectification where efficiency and reliability are prioritized over lowest unit cost.
Availability
HERA804G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, automotive-grade alternatives, and long-lifecycle industrial sourcing.
Supply support for HERA804G 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, serving global industrial, automotive, and consumer markets since 1979.
The HERA series was designed specifically for high-efficiency, high-reliability power rectification in switching-mode power supplies and motor control systems - emphasizing low VF, fast trr, and rugged packaging for harsh-environment deployment.
FAQ
What is the maximum junction temperature rating for HERA804G?
The HERA804G has a maximum junction temperature (TJ(max)) of +150°C, enabling reliable operation in high-ambient environments such as enclosed industrial enclosures or automotive engine compartments. This rating is validated under continuous 8 A forward current and proper heatsinking per its 2°C/W RθJC specification. Derating curves in the HERA804G datasheet define allowable current reduction above 25°C case temperature.
Is HERA804G pin-compatible with other devices in the HERA8xxG family?
Yes, all HERA801G through HERA808G share identical TO-220AC package dimensions, pinout, and terminal assignments - allowing design reuse across voltage grades from 50 V to 1000 V. The HERA804G uses the same anode/cathode/tab configuration as HERA803G and HERA805G, simplifying BOM consolidation and layout flexibility in multi-voltage platforms.
Does HERA804G meet automotive qualification standards?
The standard HERA804G is not AEC-Q101 qualified, but the HERA804GH variant is fully AEC-Q101 qualified and shares identical electrical specifications. HERA804GH undergoes additional stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - making it suitable for automotive powertrain and body electronics applications.
What is the reverse recovery time (trr) of HERA804G and how is it measured?
The HERA804G has a maximum reverse recovery time (trr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC test conditions. This fast recovery characteristic minimizes switching losses and voltage spikes in high-frequency converters. The value is confirmed across the HERA801G–HERA805G subgroup and applies directly to HERA804G per its published electrical specifications table.
Can HERA804G replace standard FR107 or UF4007 diodes in existing designs?
HERA804G can replace FR107 (1000 V, 1 A) or UF4007 (1000 V, 1 A) only if the application requires ≥8 A average current and benefits from lower VF and faster trr - but voltage rating must be verified: HERA804G is rated for 300 V VRRM, not 1000 V. It is not a drop-in replacement for those parts due to different voltage class and current capacity; redesign evaluation is required for voltage derating and thermal management.
HERA804G C0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 65pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
HERA804G C0G FAQ
1.How can I place an order for HERA804G C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for HERA804G C0G 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 HERA804G C0G reliable?
The price and inventory of HERA804G C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HERA804G C0G is usually 5 days.
3.What payment methods are accepted for HERA804G C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HERA804G C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HERA804G C0G?
HERA804G C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HERA804G C0G 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 HERA804G C0G?
For technical support, including HERA804G C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HERA804G C0G requirements.
6.How does Aetrix verify that HERA804G C0G is sourced from the original manufacturer or authorized distributors?
All HERA804G C0G 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 HERA804G C0G meets industry standards.
7.What is the process for return or replacement of HERA804G C0G?
All HERA804G C0G units undergo pre-shipment inspection (PSI). If there is an issue with HERA804G C0G, 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 HERA804G C0G part is unused and in its original packaging.
Return procedure for HERA804G C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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