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Taiwan Semiconductor Corporation HER208G
- Part No.:
- HER208G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER208G.pdf
- Description:
- DIODE GEN PURP 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,123
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Product details
Overview
HER208G from Taiwan Semiconductor is a 1000 V, 2 A high-efficiency ultrafast recovery rectifier diode in DO-204AC (DO-15) package, featuring 1.7 V forward voltage at 2 A and 75 ns reverse recovery time, used in high-voltage DC-DC converters and switching inverters.
For engineers reviewing the HER208G datasheet, HER208G pinout, HER208G application, or HER208G equivalent, key selection criteria include peak reverse voltage rating, surge current capability (60 A), thermal resistance (60 °C/W), junction temperature limit (150 °C), and AEC-Q101 qualification status where specified.
Technical Context
The HER208G employs a single-die glass-passivated PN junction optimized for high-voltage rectification with low conduction loss and fast switching. Its 1000 V VRRM and 75 ns trr enable use in high-frequency SMPS topologies where voltage margin and recovery speed are critical.
Thermal performance is defined by RθJA = 60 °C/W and TJ(max) = 150 °C, supporting continuous 2 A operation with appropriate PCB copper area. The device exhibits 5 µA max reverse leakage at 25 °C and 150 µA at 125 °C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input rectification in 800 V AC line or 600 V DC bus systems with safety margin |
| IF | 2 A continuous - suitable for medium-power output stages in telecom and industrial PSUs |
| IFSM | 60 A (8.3 ms half-sine) - withstands inrush and transient surges in hard-switched converters |
| VF | 1.7 V @ 2 A, 25 °C - limits conduction loss to ≤3.4 W at full load, reducing heatsink requirements |
| trr | 75 ns - enables operation up to ~2 MHz switching frequency before recovery-related losses dominate |
| RθJA | 60 °C/W - requires ≥1.5 cm² 2-oz copper pad for safe 2 A operation at 70 °C ambient |
| Junction Temp | −55 to +150 °C - qualified for under-hood automotive and industrial environments |
Pinout & Package
HER208G uses the DO-204AC (DO-15) axial-leaded package with cathode indicated by a band. Leads are pure tin-plated and solderable per J-STD-002. Device weight is approximately 0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal for forward conduction | Connected to lower-potential side of AC source or switch node in freewheeling path |
| Cathode | Negative output terminal / reverse-blocking node | Marked with band; ties to output rail or ground return; blocks 1000 V reverse stress |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances humidity resistance and long-term reliability in harsh environments without hermetic sealing |
| Ultrafast recovery (75 ns) | Reduces switching loss and EMI in high-frequency converters compared to standard rectifiers (>500 ns) |
| Low forward voltage (1.7 V) | Improves system efficiency by minimizing I²R conduction loss at 2 A load current |
| AEC-Q101 qualification option | HER208GH variant available for automotive power modules requiring stress-tested reliability |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports environmentally regulated industrial and consumer end equipment |
Applications
| DC-DC Converter Primary Rectification | Switching Inverter Output Stage |
|---|---|
Use Scenario: High-voltage isolated flyback or forward converter converting 400–800 V DC input to 12–48 V output. IC Role / Device Role / Timing Role: HER208G serves as primary-side output rectifier handling 1000 V reverse bias during MOSFET off-time. Use Value: 1000 V VRRM ensures margin against voltage spikes; 75 ns trr minimizes dead-time losses and ringing. | Use Scenario: Three-phase motor drive inverter output stage feeding 400 V AC bus to PMSM/induction motor. IC Role / Device Role / Timing Role: HER208G functions as freewheeling diode across IGBTs to clamp inductive kickback during turn-off. Use Value: 60 A IFSM handles motor stall currents; glass passivation ensures stability in humid motor control enclosures. |
| Industrial Power Supply Input Bridge | Telecom Rectifier Module |
Use Scenario: 3-phase 480 V AC input rectification feeding bulk capacitor in 3 kW industrial PSU. IC Role / Device Role / Timing Role: HER208G deployed in discrete bridge configuration for high-reliability, serviceable design. Use Value: 150 °C TJ(max) and −55 °C TSTG support wide ambient operation; DO-15 allows manual replacement in field service. | Use Scenario: Hot-swappable 48 V telecom rectifier module with redundant AC-DC conversion. IC Role / Device Role / Timing Role: HER208G used in secondary-side synchronous rectifier auxiliary supply or hold-up circuit. Use Value: 5 µA max IR at 25 °C reduces standby leakage; RoHS/halogen-free compliance meets NEBS GR-63-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-HER208 | Identical VRRM, IF, trr, and DO-15 package; VF = 1.7 V (same spec); AEC-Q101 not offered in base version | Preferred where Vishay supply chain preference or dual-sourcing is required; no automotive qualification unless VS-HER208-M3/86A | Select VS-HER208 for drop-in replacement in non-automotive industrial designs with identical thermal and electrical behavior |
| ON Semiconductor MUR2080CT | Higher VRRM (800 V), dual common-cathode configuration, TO-220AC package, VF = 1.75 V, trr = 75 ns | Suitable for higher-current parallel configurations or heatsink-mounted layouts; not axial-leaded or DO-15 compatible | Choose MUR2080CT only when board layout allows TO-220 footprint and dual-diode topology improves system efficiency |
Compared with VS-HER208, HER208G offers identical electrical specs but includes AEC-Q101-qualified variants (HER208GH); versus MUR2080CT, HER208G provides axial DO-15 mounting and simpler single-diode integration, trading off heatsink scalability for compactness and serviceability.
Availability
HER208G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for HER208G 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, computing, and power electronics markets since 1979.
The HER201G–HER208G series was designed specifically for high-efficiency, high-voltage rectification in space-constrained and thermally demanding power supplies, emphasizing ruggedness, low VF, and fast recovery without compromising manufacturability.
FAQ
What is the maximum repetitive peak reverse voltage rating for HER208G?
The HER208G has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, verified per its absolute maximum ratings table. This rating applies at TA = 25 °C and defines the highest reverse voltage the device can block repeatedly without breakdown. Derating is required above 25 °C ambient per the forward current derating curve in the datasheet.
Is HER208G suitable for automotive applications?
Yes - the HER208GH variant (AEC-Q101 qualified) is explicitly offered for automotive use, while the standard HER208G is not certified. HER208G itself meets the same electrical and thermal specifications but lacks the extended stress testing required for AEC-Q101. For automotive designs, specify HER208GH to ensure qualification compliance.
What is the forward voltage drop of HER208G at rated current?
The HER208G exhibits a typical forward voltage (VF) of 1.7 V at IF = 2 A and TJ = 25 °C, as specified in the electrical characteristics table. This value increases with junction temperature and current; at 125 °C, VF rises to approximately 1.45 V due to negative temperature coefficient of silicon diodes.
Does HER208G have a specified reverse recovery time?
Yes - the HER208G has a maximum reverse recovery time (trr) of 75 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast recovery enables efficient operation in high-frequency switching power supplies and reduces switching losses compared to standard recovery rectifiers.
What package type does HER208G use and what are its mechanical features?
HER208G uses the DO-204AC (DO-15) axial-leaded package. Key mechanical features include glass-passivated chip junction, pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, cathode polarity marked by a band, and approximate weight of 0.400 g. Lead spacing and dimensions conform to JEDEC DO-15 outline standards.
HER208G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- 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 FAQ
1.How can I place an order for HER208G through Aetrix?
Please submit a Request for Quotation (RFQ) for HER208G 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 reliable?
The price and inventory of HER208G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER208G is usually 5 days.
3.What payment methods are accepted for HER208G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER208G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER208G?
HER208G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER208G 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?
For technical support, including HER208G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER208G requirements.
6.How does Aetrix verify that HER208G is sourced from the original manufacturer or authorized distributors?
All HER208G 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 meets industry standards.
7.What is the process for return or replacement of HER208G?
All HER208G units undergo pre-shipment inspection (PSI). If there is an issue with HER208G, 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 part is unused and in its original packaging.
Return procedure for HER208G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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