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Taiwan Semiconductor Corporation HER308G-K
- Part No.:
- HER308G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER308G-K.pdf
- Description:
- 75NS, 3A, 1000V, HIGH EFFICIENT
- Quantity:
- Payment:
- Shipping:
Inventory:5,208
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Product details
Overview
HER308G-K from Taiwan Semiconductor is a high-efficiency, 3A, 1000V repetitive peak reverse voltage (VRRM) ultrafast recovery rectifier in DO-201AD package, featuring 1.7V forward voltage at 3A and 75ns reverse recovery time, used in high-frequency switching mode power supplies and freewheeling paths.
For engineers reviewing the HER308G-K datasheet, HER308G-K pinout, HER308G-K application, or HER308G-K equivalent, key selection criteria include VRRM=1000V, VF=1.7V @3A, trr=75ns, IFSM=125A, and DO-201AD thermal performance (RθJL=10°C/W), critical for DC-DC converters and inverters operating under high dv/dt conditions.
Technical Context
This device is a single-die, silicon planar junction ultrafast rectifier optimized for high-voltage, high-switching-frequency operation. Its 1000V VRRM rating and 75ns trr enable use in 100kHz+ SMPS topologies where low reverse recovery charge and minimal switching loss are essential.
The DO-201AD package provides robust thermal conduction (RθJL=10°C/W) and mechanical reliability with UL 94V-0 molding compound and pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input rectification in 800V AC line or 600V DC bus systems without derating |
| IF | 3 A continuous - delivers rated output current in compact form factor with minimal heatsinking |
| trr | 75 ns - reduces switching losses and EMI in high-frequency converters (>100 kHz) |
| VF @3A | 1.7 V - lowers conduction loss vs. standard fast rectifiers (e.g., 1N5408: ~1.2V but trr >2000ns) |
| IFSM | 125 A - withstands inrush and transient surge events in industrial power supplies |
| RθJL | 10 °C/W - enables efficient heat transfer to PCB copper or heatsink via lead frame |
| CJ @1MHz | 35 pF - minimizes capacitive coupling and noise in high-speed switching nodes |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; two terminals only - anode and cathode - mounted in through-hole configuration. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point during forward conduction | Connected to unregulated DC or transformer secondary; must handle full IF and IFSM |
| Cathode | Output current exit point during forward conduction | Connected to output filter capacitor or load; polarity marked by visible band on case |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (trr = 75 ns) | Reduces switching loss and diode-induced ringing in hard-switched PFC and LLC resonant stages |
| Low forward voltage (VF = 1.7 V @3A) | Lowers conduction loss by ~15% vs. comparable 1000V fast rectifiers with VF ≥1.85V |
| High surge capability (IFSM = 125 A) | Survives cold-start surges and short-circuit transients in industrial UPS and motor drives |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and global environmental compliance requirements for end-product certification |
Applications
| DC-DC Converter Primary-Side Rectification | Switch-Mode Inverter Freewheeling Diode |
|---|---|
Use Scenario: High-voltage isolated DC-DC converter in telecom power shelf (48V–54V input, 3.3V/12V outputs) with active clamp or phase-shifted full-bridge topology. IC Role / Device Role / Timing Role: Secondary-side ultrafast rectifier handling 100–300 kHz switching frequency and high dv/dt stress. Use Value: 75ns trr and 1000V VRRM prevent reverse recovery failure and reduce snubber losses compared to standard fast recovery diodes. | Use Scenario: Three-phase IGBT-based motor inverter (10–20 kW) requiring bidirectional energy return during regenerative braking. IC Role / Device Role / Timing Role: Freewheeling path for inductive load current when IGBTs are off; conducts during dead-time and commutation. Use Value: 125A IFSM and low VF minimize conduction heating and ensure reliable operation under repeated surge conditions. |
| AC-DC Front-End Rectification | High-Frequency Induction Heating Supply |
Use Scenario: Universal-input (90–264 VAC) offline SMPS with boost PFC stage feeding a 380V DC bus. IC Role / Device Role / Timing Role: Output rectifier in boost diode position; blocks 600V+ reverse voltage while conducting 3A average current. Use Value: 1000V VRRM provides 2× safety margin over 380V DC bus, eliminating need for series stacking or derating. | Use Scenario: Resonant tank rectification in 200–500 kHz induction heating generator for metal hardening. IC Role / Device Role / Timing Role: High-frequency output rectifier converting resonant AC to DC for work coil biasing. Use Value: 35pF junction capacitance and 75ns trr suppress parasitic oscillation and improve efficiency above 200 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | VRRM=600V, trr=50ns, VF=1.7V @3A, TO-220AC package | Lower voltage rating limits use to ≤400V DC bus; larger package requires more board area | Prefer when lower trr and higher thermal mass are prioritized over voltage headroom |
| VS-3EYH02-M3/54 | VRRM=200V, trr=35ns, VF=1.15V @3A, DO-201AD package | Insufficient VRRM for 1000V-class systems; suited only for low-voltage DC-DC secondaries | Select only for <300V applications where lowest VF and fastest trr outweigh voltage needs |
Compared with STTH3L06S and VS-3EYH02-M3/54, HER308G-K uniquely balances 1000V blocking, 75ns recovery, and DO-201AD compactness-making it optimal for space-constrained, high-input-voltage SMPS where both voltage margin and switching speed matter.
Availability
HER308G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for HER308G-K 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, and MOSFETs for industrial and computing markets.
The HER30xG-K series was designed specifically for high-efficiency, high-voltage switching power supplies demanding ultrafast recovery, low VF, and robust surge tolerance in compact DO-201AD packaging.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of HER308G-K?
The HER308G-K has a VRRM rating of 1000 V, verified per Taiwan Semiconductor's C2105 datasheet. This allows safe operation in circuits with up to 700V DC bus or 500V AC RMS input after accounting for safety margins and transient spikes. HER308G-K is the highest-voltage variant in the HER301G-K to HER308G-K family.
What is the forward voltage drop of HER308G-K at 3A and 25°C?
The HER308G-K exhibits a maximum forward voltage (VF) of 1.7 V at IF = 3 A and TJ = 25°C, as specified in the electrical characteristics table. This value is measured under pulsed conditions (PW = 0.3 ms) and reflects typical conduction loss behavior in high-frequency switching applications.
Does HER308G-K have a halogen-free construction?
Yes, HER308G-K is halogen-free in accordance with IEC 61249-2-21 and RoHS compliant, as confirmed in the FEATURES section of the official datasheet. The molding compound and plating materials meet strict environmental standards required for modern industrial and telecom equipment.
What is the reverse recovery time (trr) specification for HER308G-K?
The HER308G-K has a maximum reverse recovery time (trr) of 75 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast recovery characteristic is shared with HER306G-K and HER307G-K, distinguishing them from lower-voltage variants with trr ≤50 ns.
Which package type does HER308G-K use, and what are its key mechanical properties?
HER308G-K uses the DO-201AD package, featuring axial leads, UL 94V-0 flammability-rated epoxy molding, pure tin-plated leads compliant with J-STD-002, and JESD 201 Class 1A whisker resistance. Its weight is approximately 1.10 g, and polarity is indicated by a cathode band.
HER308G-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1000 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER308G-K FAQ
1.How can I place an order for HER308G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER308G-K 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 HER308G-K reliable?
The price and inventory of HER308G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER308G-K is usually 5 days.
3.What payment methods are accepted for HER308G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER308G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER308G-K?
HER308G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER308G-K 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 HER308G-K?
For technical support, including HER308G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER308G-K requirements.
6.How does Aetrix verify that HER308G-K is sourced from the original manufacturer or authorized distributors?
All HER308G-K 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 HER308G-K meets industry standards.
7.What is the process for return or replacement of HER308G-K?
All HER308G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER308G-K, 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 HER308G-K part is unused and in its original packaging.
Return procedure for HER308G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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