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Taiwan Semiconductor Corporation HER108G-K
- Part No.:
- HER108G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
HER108G-K.pdf
- Description:
- 75NS, 1A, 1000V, HIGH EFFICIENT
- Quantity:
- Payment:
- Shipping:
Inventory:7,554
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Product details
Overview
HER108G-K from Taiwan Semiconductor is a 1 A, 1000 V high-efficiency ultrafast recovery rectifier diode in DO-204AL (DO-41) package, featuring 1.7 V forward voltage at 1 A and 75 ns reverse recovery time - optimized for high-frequency switching power supplies and freewheeling paths in industrial DC-DC converters.
For engineers reviewing the HER108G-K datasheet, HER108G-K pinout, HER108G-K application, or HER108G-K equivalent, key selection criteria include peak reverse voltage rating (1000 V), surge current capability (30 A), thermal resistance (60 °C/W junction-to-ambient), RoHS/halogen-free compliance, and DO-41 mechanical compatibility with legacy through-hole layouts.
Technical Context
This device is a single-die, glass-passivated silicon PN junction rectifier engineered for ultrafast recovery performance. Its 75 ns trr and low 1.7 V VF at 1 A support efficient operation in high-frequency SMPS topologies where switching losses must be minimized.
The HER108G-K operates across -55 °C to +150 °C junction temperature range and delivers 30 A non-repetitive surge current under 8.3 ms half-sine conditions. Its DO-204AL package features pure tin-plated leads compliant with J-STD-002 and JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input rectification in 800 VAC line-derived systems or high-voltage DC bus applications |
| IF | 1 A continuous - suitable for medium-power output stages in adapters and auxiliary rails |
| IFSM | 30 A - withstands inrush and transient overloads in motor drives and UPS hold-up circuits |
| trr | 75 ns - enables stable operation up to ~2 MHz switching frequency with controlled turn-off loss |
| VF @ 1 A | 1.7 V - reduces conduction loss vs. standard rectifiers, improving efficiency in 12–48 V output converters |
| RθJA | 60 °C/W - requires minimal heatsinking in free-air PCB mounting for <1 W dissipation |
| IR @ 1000 V | 5 µA @ 25°C - ensures low leakage in high-impedance bias networks and sensing circuits |
Pinout & Package
HER108G-K uses the DO-204AL (DO-41) axial-leaded package with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002; polarity is unambiguous and mechanically robust for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point during forward conduction | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) |
| Cathode (banded end) | Current exit point during forward conduction; reverse-blocking terminal | Connected to output rail or smoothing capacitor positive; defines voltage reference for freewheeling path |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances humidity resistance and long-term reliability in humid or condensing environments |
| Ultrafast recovery (75 ns) | Reduces switching loss and EMI generation compared to standard recovery rectifiers in >100 kHz designs |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental compliance requirements for industrial and consumer products |
| UL 94V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical power supply certifications (e.g., UL 62368-1) |
Applications
| AC-DC Front-End Rectification | DC-DC Converter Output Stage |
|---|---|
Use Scenario: Rectifying 400–800 VDC PFC output or 3-phase rectified bus in industrial power supplies. IC Role / Device Role / Timing Role: High-voltage output rectifier handling continuous 1 A load with minimal conduction loss and reliable 1000 V blocking. Use Value: Enables compact, thermally efficient designs by combining high VRRM with low RθJA and 1.7 V VF - reducing heatsink size vs. slower 1000 V alternatives. | Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V at ≤1 A. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during MOSFET off-time in high-frequency switching topologies. Use Value: 75 ns trr minimizes reverse recovery charge (Qrr), lowering switching loss and improving light-load efficiency over standard rectifiers. |
| Uninterruptible Power Supply (UPS) Hold-Up | Motor Drive Freewheeling |
Use Scenario: Maintaining DC bus voltage during brief AC mains interruption using bulk capacitor energy. IC Role / Device Role / Timing Role: Bidirectional energy transfer element supporting both charging and discharge paths in battery-backed systems. Use Value: 30 A IFSM rating allows safe handling of capacitor inrush and regenerative surges without derating or parallel devices. | Use Scenario: Clamping inductive kickback from brushed DC or stepper motor windings in industrial actuators. IC Role / Device Role / Timing Role: Fast-turn-off freewheeling diode preventing voltage overshoot and MOSFET avalanche stress during PWM commutation. Use Value: Low VF and fast trr reduce heat generation and improve system response time, enabling tighter PWM control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | Same 1 A / 600 V rating; 50 ns trr, 1.3 V VF - lower VRRM and faster recovery than HER108G-K | Not rated for 1000 V systems; limited to ≤600 V DC bus applications | Select when 600 V rating suffices and lowest possible trr is prioritized over voltage margin |
| ES1J | 1 A / 600 V, 35 ns trr, 1.7 V VF - significantly faster but lower voltage rating and higher leakage (50 µA) | Unsuitable for 800–1000 V applications; higher IR may affect standby power in high-impedance bias networks | Prefer for cost-sensitive 400–600 V designs requiring fastest possible recovery, accepting reduced voltage headroom |
Compared with STTH1R06 and ES1J, the HER108G-K provides unique 1000 V blocking capability at 1 A with balanced trr (75 ns) and VF (1.7 V), making it the only option among the three qualified for 800 VAC-derived or telecom rectifier applications without series stacking.
Availability
HER108G-K is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and UPS hold-up circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HER108G-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, serving industrial, computing, and consumer markets since 1979.
The HER101G-K to HER108G-K family targets high-efficiency, high-reliability rectification in switching power supplies - emphasizing ultrafast recovery, wide temperature operation, and environmentally compliant packaging for demanding industrial deployments.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for HER108G-K?
The HER108G-K has a VRRM rating of 1000 V, confirmed in the Absolute Maximum Ratings table on page 1 of the official Taiwan Semiconductor datasheet (Version B2104). This rating allows use in 800 VAC line-derived systems and high-voltage DC bus applications where margin above 700 V is required. The "8" in HER108G-K explicitly denotes the 1000 V grade within the HER10xG-K series.
What is the forward voltage drop of HER108G-K at 1 A and 25°C?
The HER108G-K exhibits a typical forward voltage (VF) of 1.7 V at 1 A and 25°C, as specified in the Electrical Specifications table under "HER106G-K – HER108G-K" grouping. This value is measured under pulse conditions (PW = 0.3 ms) and reflects conduction loss relevant to continuous 1 A operation in well-ventilated or moderately heatsinked PCB layouts.
Does HER108G-K have ultrafast recovery characteristics, and what is its trr value?
Yes, HER108G-K is classified as an ultrafast recovery rectifier with 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 value is documented in the Electrical Specifications table for the HER106G-K through HER108G-K variants and enables efficient operation in switching power supplies operating up to ~2 MHz.
What package type does HER108G-K use, and is it lead-free?
HER108G-K uses the DO-204AL (DO-41) axial-leaded package with pure tin-plated leads compliant with J-STD-002 solderability standards. It is RoHS-compliant and halogen-free per IEC 61249-2-21, with no lead content - confirmed in the Features and Mechanical Data sections of the Taiwan Semiconductor datasheet.
What is the junction-to-ambient thermal resistance (RθJA) of HER108G-K?
The HER108G-K has a typical junction-to-ambient thermal resistance (RθJA) of 60 °C/W, as listed in the Thermal Performance section of the datasheet. This value assumes standard PCB mounting on FR-4 with 1-inch² copper pad; actual thermal performance depends on board layout, airflow, and copper area, but this RθJA enables operation up to 1 W dissipation without forced cooling.
HER108G-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER108G-K FAQ
1.How can I place an order for HER108G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER108G-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 HER108G-K reliable?
The price and inventory of HER108G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER108G-K is usually 5 days.
3.What payment methods are accepted for HER108G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER108G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER108G-K?
HER108G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER108G-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 HER108G-K?
For technical support, including HER108G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER108G-K requirements.
6.How does Aetrix verify that HER108G-K is sourced from the original manufacturer or authorized distributors?
All HER108G-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 HER108G-K meets industry standards.
7.What is the process for return or replacement of HER108G-K?
All HER108G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER108G-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 HER108G-K part is unused and in its original packaging.
Return procedure for HER108G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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