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Taiwan Semiconductor Corporation HERA805G C0G
- Part No.:
- HERA805G C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
HERA805G C0G.pdf
- Description:
- DIODE GEN PURP 400V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,557
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Product details
Overview
HERA805G from Taiwan Semiconductor is an 8A, 500V glass-passivated high-efficiency rectifier diode in TO-220AC package, featuring 1.3V forward voltage at 8A/25°C, 50ns reverse recovery time, and 65pF junction capacitance - deployed in DC-DC converters and freewheeling paths of switching inverters.
For engineers reviewing the HERA805G datasheet, HERA805G pinout, HERA805G application, or HERA805G equivalent, key selection criteria include VRRM = 500V, IFSM = 150A (8.3ms), TJ(max) = 150°C, RθJC = 2°C/W, and AEC-Q101 qualification availability (HERA805GH variant).
Technical Context
This single-die, unidirectional silicon rectifier uses glass passivation for enhanced moisture and contamination resistance. Its low VF and fast trr enable high-frequency switching efficiency in hard-switched topologies.
The device operates across -55°C to +150°C junction temperature range with 2°C/W thermal resistance from junction to case, supporting conduction-limited thermal design in compact power stages where heatsink interface resistance dominates total thermal path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/clamp circuits. |
| IF | 8 A - Continuous forward current rating at TC = 100°C; determines steady-state conduction capability. |
| IFSM | 150 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and fault-current handling. |
| VF @ 8A, 25°C | 1.3 V - Forward voltage drop; directly impacts conduction loss and thermal load in high-duty-cycle operation. |
| trr | 50 ns - Reverse recovery time; limits switching frequency and reduces turn-off losses in SMPS. |
| RθJC | 2 °C/W - Junction-to-case thermal resistance; enables accurate heatsink sizing for 8A continuous operation. |
Pinout & Package
Package: TO-220AC - 3-lead, single-ended through-hole package with isolated tab (cathode-connected 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 | Input terminal for forward conduction | Connected to source side in freewheeling or output rectification; requires PCB trace width matching 8A RMS current. |
| Cathode | Output terminal for forward conduction | Electrically tied to metal tab; must be insulated from heatsink unless system ground reference permits direct mounting. |
| Tab (Cathode) | Thermal and electrical cathode connection | Serves dual role: primary heat dissipation path and circuit node; mandates dielectric pad or shoulder washer if isolated mounting required. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reliability under humid or contaminated environments without hermetic sealing. |
| Low VF (1.3V @ 8A) | Reduces conduction loss by ~15% vs. standard FR-type diodes at same current, lowering thermal stress in dense layouts. |
| Fast trr (50ns) | Minimizes reverse recovery charge (Qrr), reducing EMI and switching losses in 100–500 kHz SMPS designs. |
| AEC-Q101 qualification option | HERA805GH variant meets automotive-grade stress testing for under-hood power conversion modules. |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated 48V–400V input DC-DC converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Unidirectional current steering device converting transformer AC output to regulated DC bus. Use Value: 1.3V VF and 50ns trr reduce average power loss and improve efficiency >92% at full load in 200–300 kHz phase-shifted full-bridge designs. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Clamp diode providing low-impedance return path during switch off-time to prevent voltage spikes. Use Value: 150A IFSM withstands motor stall currents; 2°C/W RθJC allows direct heatsink mounting without thermal derating below 8A RMS. |
| Industrial Switch-Mode Power Supply | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Primary-side snubber or secondary-side output rectifier in 1–3 kW industrial SMPS with forced-air cooling. IC Role / Device Role / Timing Role: High-current rectifying element handling continuous 8A output with minimal thermal rise. Use Value: 150°C TJ(max) and -55°C TSTG support operation in harsh factory environments; RoHS/halogen-free compliance meets IPC-1752 requirements. | Use Scenario: Auxiliary 12V/24V supply rectification stage in AEC-Q101-compliant OBC systems. IC Role / Device Role / Timing Role: High-reliability rectifier in isolated auxiliary flyback converter powering gate drivers and MCU rails. Use Value: HERA805GH variant satisfies automotive qualification; glass passivation ensures robustness against under-hood condensation and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | VRRM = 600V, VF = 1.7V @ 8A, trr = 60ns, TO-220AC | Higher VRRM margin but higher VF increases conduction loss by ~0.4W at 8A | Prefer when 600V blocking headroom is critical and thermal budget allows extra loss. |
| VS-8EWH06FN-M3 | VRRM = 600V, VF = 1.25V @ 8A, trr = 45ns, TO-220AC | Lower VF and faster trr, but no AEC-Q101 option and tighter VR(RMS) derating | Choose for highest efficiency in non-automotive 500–600V applications with strict EMI limits. |
Compared with STTH8R06D and VS-8EWH06FN-M3, HERA805G offers optimal balance of 500V rating, 1.3V VF, and AEC-Q101 availability - making it preferred for cost-sensitive automotive auxiliary supplies and industrial converters requiring proven field reliability at moderate voltage stress.
Availability
HERA805G 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 manufacturing continuity.
Supply support for HERA805G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.
The HERA series targets high-efficiency, high-reliability rectification in medium-power switching power supplies - designed specifically for applications demanding low VF, fast recovery, and ruggedized packaging under thermal and environmental stress.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for HERA805G?
The HERA805G has a VRRM rating of 500 V, confirmed in the Absolute Maximum Ratings table on page 1 of the official Taiwan Semiconductor datasheet (Version J2103). This value defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions and is strictly validated per JEDEC test methods.
Is HERA805G suitable for automotive applications?
HERA805G itself is not AEC-Q101 qualified; however, the HERA805GH variant - identical in all electrical and thermal specifications - is fully AEC-Q101 qualified. Engineers selecting HERA805G for automotive use must specify the 'H' suffix to ensure qualification compliance for under-hood auxiliary power supplies and gate driver bias rails.
What is the forward voltage drop of HERA805G at rated current?
The HERA805G exhibits a maximum forward voltage (VF) of 1.3 V at IF = 8 A and TJ = 25°C, as specified in the Electrical Specifications table (page 2, Version J2103). This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss under nominal junction temperature.
Does HERA805G have a thermally isolated package?
No - the HERA805G uses a TO-220AC package where the metal tab is electrically connected to the cathode terminal. The tab serves as both the primary thermal path and a circuit node. Isolation requires a dielectric pad or shoulder washer; direct heatsink mounting is only safe when the heatsink is referenced to cathode potential.
What is the junction-to-case thermal resistance (RθJC) of HERA805G?
The HERA805G has a typical junction-to-case thermal resistance (RθJC) of 2°C/W, as published in the Thermal Performance section (page 2, Version J2103). This value is measured per JESD51-14 and enables accurate thermal modeling when paired with verified heatsink thermal resistance and interface material data.
HERA805G 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):
- 400 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 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
HERA805G C0G FAQ
1.How can I place an order for HERA805G C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for HERA805G 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 HERA805G C0G reliable?
The price and inventory of HERA805G C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HERA805G C0G is usually 5 days.
3.What payment methods are accepted for HERA805G C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HERA805G C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HERA805G C0G?
HERA805G C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HERA805G 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 HERA805G C0G?
For technical support, including HERA805G C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HERA805G C0G requirements.
6.How does Aetrix verify that HERA805G C0G is sourced from the original manufacturer or authorized distributors?
All HERA805G 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 HERA805G C0G meets industry standards.
7.What is the process for return or replacement of HERA805G C0G?
All HERA805G C0G units undergo pre-shipment inspection (PSI). If there is an issue with HERA805G 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 HERA805G C0G part is unused and in its original packaging.
Return procedure for HERA805G C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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