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Taiwan Semiconductor Corporation HER301G-K
- Part No.:
- HER301G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER301G-K.pdf
- Description:
- 50NS, 3A, 50V, HIGH EFFICIENT RE
- Quantity:
- Payment:
- Shipping:
Inventory:5,094
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Product details
Overview
HER301G-K from Taiwan Semiconductor is a 3 A, 50 V high-efficiency ultrafast recovery rectifier diode in DO-201AD package, featuring 1.0 V forward voltage at 3 A and 50 ns reverse recovery time, used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the HER301G-K datasheet, HER301G-K pinout, HER301G-K application, or HER301G-K equivalent, key selection criteria include repetitive peak reverse voltage (50 V), surge current rating (125 A), junction-to-lead thermal resistance (10 °C/W), RoHS/halogen-free compliance, and cathode-band polarity marking.
Technical Context
This single-die, axial-lead rectifier operates with a maximum junction temperature of 150 °C and supports continuous forward current up to 3 A at case temperatures ≤75 °C. Its 50 ns trr and low VF enable high-frequency switching efficiency in SMPS topologies.
The device uses pure tin-plated leads compliant with J-STD-002 and meets JESD 201 Class 1A whisker resistance. Polarity is indicated by a cathode band; package conforms to DO-201AD mechanical outline and UL 94V-0 flammability standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous Forward Current) | 3 A - Sustains full-rated output current in compact DC-DC converter designs without forced cooling |
| VRRM (Repetitive Peak Reverse Voltage) | 50 V - Supports input stages of low-voltage buck converters and auxiliary rails |
| IFSM (Surge Peak Forward Current) | 125 A - Withstands inrush and transient overloads in industrial power supplies |
| trr (Reverse Recovery Time) | 50 ns - Minimizes switching losses and EMI in 100–500 kHz SMPS operation |
| VF (Forward Voltage @ 3 A, 25°C) | 1.0 V - Reduces conduction loss to ~3 W per diode at full load, improving thermal margin |
| RθJL (Junction-to-Lead Thermal Resistance) | 10 °C/W - Enables direct PCB copper pour heat sinking for reliable 3 A operation |
| IR (Reverse Current @ 50 V, 25°C) | 10 µA - Ensures minimal leakage in high-impedance hold-up or sensing circuits |
Pinout & Package
DO-201AD package: axial-leaded, molded plastic case with cathode band marking; lead finish is pure tin, solderable per J-STD-002; weight ≈1.10 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node in synchronous buck); requires adequate trace width for 3 A RMS |
| Cathode (Lead 2, banded end) | Current exit terminal during forward conduction; reverse-blocking terminal | Connected to output rail or positive bus; cathode band must align with PCB silkscreen polarity indicator |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (trr = 50 ns) | Enables efficient operation up to 500 kHz switching frequency with reduced turn-off loss and ringing |
| Low forward voltage (VF = 1.0 V @ 3 A) | Lowers conduction loss by ~15% vs. standard FR301, improving system efficiency at light-to-full load |
| High surge rating (IFSM = 125 A) | Survives cold-start surges and short-circuit events without bond-wire fusing |
| RoHS & halogen-free compliance | Fulfills IEC 61249-2-21 and global environmental requirements for industrial and consumer end equipment |
| Junction temperature range (−55 to +150 °C) | Supports deployment in under-hood automotive auxiliary supplies and unventilated industrial enclosures |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V → 5 V/3.3 V flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output; blocks reverse voltage during transformer reset. Use Value: 50 ns trr minimizes dead-time losses; 1.0 V VF reduces output-stage conduction loss by >0.3 W vs. slower alternatives at 3 A. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss return path for inductive kickback current during high-side switch off-time. Use Value: 125 A IFSM handles motor stall currents; 10 °C/W RθJL allows direct copper pour mounting for thermal reliability. |
| AC-DC Adapter Auxiliary Supply | Industrial PLC Power Rail Protection |
Use Scenario: Bias supply rectification for control ICs in universal-input (90–264 VAC) adapters. IC Role / Device Role / Timing Role: Converts rectified AC waveform to stable low-voltage DC for PWM controller and gate drivers. Use Value: 50 V VRRM suffices for clamped auxiliary winding voltages; 10 µA IR prevents standby power drain. | Use Scenario: Reverse-polarity and back-EMF protection on 24 V DC input rails of programmable logic controllers. IC Role / Device Role / Timing Role: Blocks reverse connection damage and clamps inductive transients during field-device disconnection. Use Value: Cathode-band polarity marking ensures correct orientation; UL 94V-0 molding compound resists arc tracking in dusty environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | 600 V VRRM, 3 A IF, 65 ns trr, TO-220AC package | Higher voltage rating suits 400 V bus systems; larger footprint and higher thermal mass | Select when >100 V reverse blocking is required and board space permits TO-220 mounting |
| MBR360RLG | Schottky diode, 60 V VRRM, 3 A IF, VF = 0.72 V, no reverse recovery | Zero trr eliminates switching loss but limits max TJ to 125 °C and increases leakage (>100 µA) | Prefer for <100 kHz, low-noise, low-VF apps where leakage and temperature derating are acceptable |
Compared with STTH3L06S and MBR360RLG, the HER301G-K offers optimal balance of low VF (1.0 V), fast trr (50 ns), 50 V rating, and DO-201AD form factor-making it ideal for cost-sensitive, space-constrained 12–24 V SMPS outputs where moderate reverse voltage suffices.
Availability
HER301G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for HER301G-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 1992.
The HER301G-K belongs to TSC's High-Efficiency Rectifier (HER) family, engineered specifically for high-frequency switching power supplies demanding low VF, fast trr, and robust surge capability in compact axial packages.
FAQ
What is the maximum junction temperature rating for HER301G-K?
The HER301G-K has a maximum junction temperature (TJ MAX) of +150 °C, enabling reliable operation in enclosed industrial power supplies and automotive under-dash environments where ambient temperatures exceed 85 °C. Derating curves in the datasheet specify that full 3 A current is supported up to 75 °C case temperature; above that, linear derating applies. This TJ rating is confirmed in the Absolute Maximum Ratings table on page 2 of the C2105 datasheet.
Does HER301G-K have a specified reverse recovery time (trr), and what test conditions apply?
Yes, HER301G-K has a typical reverse recovery time (trr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Electrical Specifications table on page 2 of the C2105 datasheet. This value applies to the entire HER301G-K through HER305G-K group and reflects performance at 25 °C junction temperature using a standardized half-sine test waveform.
Is HER301G-K RoHS and halogen-free compliant?
Yes, HER301G-K is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the C2105 datasheet. The "G" in HER301G-K denotes green (halogen-free) molding compound, and the device carries full compliance documentation for EU and global environmental regulations.
What is the marking code printed on the HER301G-K package?
The HER301G-K is marked "HER301G" on the body, per the Marking Diagram on page 5 of the C2105 datasheet. The "G" suffix indicates halogen-free compound; "YWW" denotes date code (year-week), and "F" identifies the manufacturing factory. No additional symbols or logos appear on the device surface.
What packaging options are available for HER301G-K?
HER301G-K is supplied in two standard packaging formats: 1,250 units per 12 mm tape-and-reel (ordering code HER301G-K), and 500 units per ammo box (ordering code HER301G-K A0G). Both use DO-201AD packaging and comply with EIA-481 and JEDEC standards for automated placement.
HER301G-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):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER301G-K FAQ
1.How can I place an order for HER301G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER301G-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 HER301G-K reliable?
The price and inventory of HER301G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER301G-K is usually 5 days.
3.What payment methods are accepted for HER301G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER301G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER301G-K?
HER301G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER301G-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 HER301G-K?
For technical support, including HER301G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER301G-K requirements.
6.How does Aetrix verify that HER301G-K is sourced from the original manufacturer or authorized distributors?
All HER301G-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 HER301G-K meets industry standards.
7.What is the process for return or replacement of HER301G-K?
All HER301G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER301G-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 HER301G-K part is unused and in its original packaging.
Return procedure for HER301G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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