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Taiwan Semiconductor Corporation HER208G A0G
- Part No.:
- HER208G A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER208G A0G.pdf
- Description:
- DIODE GEN PURP 1KV 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,609
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Product details
Overview
HER208G A0G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 2 A average forward current and 1000 V repetitive peak reverse voltage, with 60 A surge capability and low 1.7 V forward voltage at 2 A - used in high-voltage DC-DC converters and freewheeling paths in industrial switching inverters.
For engineers reviewing the HER208G A0G datasheet, HER208G A0G pinout, HER208G A0G application, or HER208G A0G equivalent, key selection criteria include verified VRRM = 1000 V, IF = 2 A, trr = 75 ns, RθJA = 60 °C/W, and DO-204AC (DO-15) package compatibility with standard through-hole power layouts.
Technical Context
This device is a single-die, unidirectional, fast-recovery rectifier optimized for high-voltage switching-mode power supplies. Its 75 ns reverse recovery time and 20 pF junction capacitance support efficient operation above 50 kHz, while the glass-passivated junction ensures stable performance under thermal cycling and humidity stress.
The HER208G A0G operates across –55 °C to +150 °C junction temperature range and delivers 2 A continuous forward current with only 1.7 V conduction loss at rated load - enabling lower thermal design margins than standard FR/UF diodes in 800–1000 V rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in offline SMPS designs up to 850 V DC bus |
| IF | 2 A - continuous forward current rating at TA = 75 °C with derating per curve Fig.1 |
| IFSM | 60 A - withstands 8.3 ms half-sine surge, critical for input rectifier inrush handling |
| trr | 75 ns - enables high-frequency operation with reduced switching losses vs. standard rectifiers |
| VF | 1.7 V @ 2 A, 25 °C - lowers conduction loss and heatsink requirements in compact converters |
| RθJA | 60 °C/W - defines thermal rise from junction to ambient in standard PCB mount (JEDEC 2S2P) |
| CJ | 20 pF @ 4 V - minimizes capacitive coupling noise in high-dv/dt gate-drive or snubber circuits |
Pinout & Package
HER208G A0G uses the DO-204AC (DO-15) axial-leaded package with cathode indicated by a band on the body. Leads are pure tin-plated and solderable per J-STD-002; molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential side of AC source or switch node in freewheeling path |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or positive DC bus; blocks 1000 V reverse during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables reliable operation in humid or thermally cycled environments without degradation |
| Low VF (1.7 V) | Reduces power dissipation by ~15% vs. comparable 1000 V UF diodes at 2 A |
| Fast trr (75 ns) | Lowers switching loss and EMI in 50–200 kHz SMPS topologies |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Industrial DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: High-voltage isolated DC-DC converter in programmable logic controller (PLC) power supply. IC Role / Device Role / Timing Role: Primary-side output rectifier converting 600–900 V DC bus to regulated 24 V output. Use Value: 1000 V VRRM provides 20% margin over 850 V max bus; 75 ns trr reduces turn-off loss in phase-shifted full-bridge topology. | Use Scenario: Voltage-source inverter for HVAC compressor drive operating from 690 V AC mains. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs in three-phase bridge leg. Use Value: 60 A IFSM handles motor regeneration surges; 1.7 V VF limits conduction loss during extended low-speed operation. |
| Telecom Rectifier Modules | Renewable Energy Interfaces |
Use Scenario: Secondary-side rectification in 48 V telecom rectifier with 380 V DC input. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement in high-density brick modules. Use Value: DO-204AC footprint allows drop-in upgrade from slower FR107; 20 pF CJ suppresses ringing in high-frequency flyback outputs. | Use Scenario: String-level DC optimizer in photovoltaic systems with 1000 V PV array voltage. IC Role / Device Role / Timing Role: Bypass diode protecting individual solar substrings from hot-spot failure. Use Value: 150 °C TJMAX sustains operation under desert ambient conditions; glass passivation prevents moisture-induced leakage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R06 | VRRM = 600 V, trr = 35 ns, VF = 1.7 V @ 2 A | Lower voltage rating limits use to ≤500 V DC bus; faster recovery suits higher-frequency designs | Select when system VRRM margin < 20% and switching frequency > 200 kHz |
| ES2J | VRRM = 600 V, IF = 2 A, trr = 35 ns, DO-214AA package | SMD package requires layout change; lower VRRM excludes 800–1000 V applications | Choose for automated assembly where board space is constrained and voltage ≤600 V |
Compared with STTH2R06 and ES2J, HER208G A0G uniquely supports 1000 V operation in a through-hole DO-204AC package with industry-standard 75 ns recovery - making it the only option among the three for 1000 V DC string protection or 850 V offline SMPS rectification without redesign.
Availability
HER208G A0G is available at Aetrix Electronics and suitable for industrial DC-DC converters, renewable energy interface modules, and telecom rectifier systems requiring stable component supply and long-term lifecycle continuity.
Supply support for HER208G A0G 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 industrial, automotive, and computing markets since 1979.
The HER20xG series was designed specifically for high-reliability, high-voltage rectification in switching power supplies - emphasizing thermal robustness, surge resilience, and long-term parametric stability under harsh operating conditions.
FAQ
What is the maximum junction temperature rating for HER208G A0G?
The HER208G A0G has a maximum junction temperature (TJMAX) of +150 °C, validated across its full operating range from –55 °C to +150 °C. This rating is confirmed in the Absolute Maximum Ratings table and supported by thermal derating curves in the datasheet. The HER208G A0G maintains specified electrical performance within this range when mounted on standard JEDEC 2S2P test board.
Is HER208G A0G AEC-Q101 qualified?
No, HER208G A0G is not AEC-Q101 qualified. Only variants marked with "H" suffix (e.g., HER208GH) meet AEC-Q101 requirements. The "A0G" suffix denotes ammo box packaging (1,500 units) in the standard industrial-grade version. HER208G A0G shares identical electrical and thermal specifications with HER208G but lacks automotive qualification testing and traceability documentation.
What is the reverse recovery time (trr) of HER208G A0G and how is it measured?
The HER208G A0G has a typical reverse recovery time (trr) of 75 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table. This value applies to HER206G through HER208G variants and is validated using the test circuit shown in Figure 6 of the datasheet. It reflects performance at 25 °C ambient.
Does HER208G A0G have lead-free and RoHS-compliant construction?
Yes, HER208G A0G is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its leads are pure tin-plated and solderable per J-STD-002, and the molding compound meets UL 94V-0 flammability rating. The "G" suffix in HER208G A0G explicitly denotes green (halogen-free) compound, confirmed in the Ordering Information section.
What is the junction-to-ambient thermal resistance (RθJA) of HER208G A0G?
The HER208G A0G has a typical junction-to-ambient thermal resistance (RθJA) of 60 °C/W, measured on a standard JEDEC 2S2P test board. This value is listed in the Thermal Performance table and applies to the DO-204AC (DO-15) package in free-air convection. Actual RθJA will improve with copper pour or heatsinking in production PCB layouts.
HER208G A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER208G A0G FAQ
1.How can I place an order for HER208G A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for HER208G A0G 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 HER208G A0G reliable?
The price and inventory of HER208G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER208G A0G is usually 5 days.
3.What payment methods are accepted for HER208G A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER208G A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER208G A0G?
HER208G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER208G A0G 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 HER208G A0G?
For technical support, including HER208G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER208G A0G requirements.
6.How does Aetrix verify that HER208G A0G is sourced from the original manufacturer or authorized distributors?
All HER208G A0G 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 HER208G A0G meets industry standards.
7.What is the process for return or replacement of HER208G A0G?
All HER208G A0G units undergo pre-shipment inspection (PSI). If there is an issue with HER208G A0G, 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 HER208G A0G part is unused and in its original packaging.
Return procedure for HER208G A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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