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Taiwan Semiconductor Corporation HER301G
- Part No.:
- HER301G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER301G.pdf
- Description:
- DIODE GEN PURP 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,399
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Product details
Overview
HER301G from Taiwan Semiconductor is a 3A, 50V high-efficiency ultrafast recovery rectifier diode in DO-201AD package, featuring 1.0V forward voltage at 3A and 50ns reverse recovery time, designed for DC-DC converters and switching-mode power supplies requiring low conduction loss and fast switching.
For engineers reviewing the HER301G datasheet, HER301G pinout, HER301G application, or HER301G equivalent, key selection criteria include its 50V repetitive peak reverse voltage, 125A surge current rating, junction-to-lead thermal resistance of 10°C/W, AEC-Q101 qualification availability (HER301GH variant), and DO-201AD mechanical compatibility with standard through-hole power rectifier footprints.
Technical Context
The HER301G employs a single-die planar epitaxial construction optimized for ultrafast recovery (trr ≤ 50 ns), enabling high-frequency operation in SMPS topologies. Its low VF (1.0 V @ 3A, 25°C) and low junction capacitance (60 pF @ 4V) reduce conduction and switching losses simultaneously.
Thermally, it supports continuous operation up to 150°C junction temperature with RθJL = 10°C/W, allowing direct heatsinking via the cathode lead. The DO-201AD package provides UL 94V-0 rated molding and pure tin-plated leads compliant with J-STD-002 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling paths |
| IF | 3 A - Continuous average forward current; sets baseline power handling without derating below 75°C case temp |
| VF @ 3A | 1.0 V - Forward voltage drop at rated current; directly determines conduction loss (3W max at full load) |
| trr | 50 ns - Reverse recovery time; enables stable operation up to ~2 MHz switching frequencies in hard-switched converters |
| IFSM | 125 A - Non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients in industrial PSUs |
| RθJL | 10 °C/W - Junction-to-lead thermal resistance; allows direct thermal path to PCB copper or heatsink via cathode terminal |
| IR @ 50V | 10 µA - Reverse leakage at rated VR and 25°C; ensures minimal standby power loss in high-impedance bias networks |
Pinout & Package
HER301G uses the DO-201AD axial-leaded package with cathode indicated by a band. Leads are pure tin-plated and solderable per J-STD-002. Polarity is unambiguous: banded end = cathode; opposite end = anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/high-side node in freewheeling or output rectification; must handle full IF and IFSM |
| Cathode | Forward current exit / reverse blocking terminal | Primary thermal path (RθJL = 10°C/W); tied to output/common rail; carries return current and heat |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (trr ≤ 50 ns) | Enables >1 MHz switching in compact DC-DC converters while minimizing switching loss and EMI generation |
| Low VF (1.0 V @ 3A) | Reduces conduction loss to ≤3 W at full rated current, improving efficiency in 12–48 V output rails |
| DO-201AD with UL 94V-0 compound | Supports automated through-hole assembly and meets flammability requirements for industrial enclosures |
| AEC-Q101 qualified option (HER301GH) | Validated for automotive under-hood applications including engine control and body electronics modules |
| Junction temp range: –55°C to +150°C | Permits deployment in extended-temperature environments such as outdoor power supplies and motor drives |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24 V → 5 V/3.3 V buck-derived converters powering FPGAs and microcontrollers. IC Role / Device Role / Timing Role: High-efficiency output rectifier replacing Schottky diodes where higher VR capability and lower leakage are required. Use Value: 1.0 V VF and 50 ns trr jointly reduce total power loss by ≥15% vs. standard FRD alternatives at 500 kHz switching. | Use Scenario: Freewheeling path across inductive loads (e.g., solenoids, relay coils) in 24 V industrial PLC output stages. IC Role / Device Role / Timing Role: Fast-recovery clamp diode suppressing inductive kickback spikes during MOSFET turn-off. Use Value: 125 A IFSM rating safely absorbs energy from 100 mH coils with 2 A steady-state current without failure. |
| AC-DC Adapter Secondary Rectification | Automotive Body Control Module Power Supply |
Use Scenario: Output rectification in universal-input 12 V/2.5 A wall adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Primary secondary-side rectifier handling continuous 3 A load with minimal thermal rise on double-sided PCBs. Use Value: RθJL = 10°C/W enables direct copper pour heatsinking, limiting ΔT to <30°C at full load without external heatsink. | Use Scenario: Input rectification and hold-up protection in 12 V battery-fed BCM power rails exposed to load dump transients. IC Role / Device Role / Timing Role: AEC-Q101-qualified rectifier (HER301GH variant) providing robust reverse blocking and surge immunity. Use Value: Withstands 50 V VR and 125 A IFSM surges per ISO 7637-2 Pulse 5a, eliminating need for parallel TVS clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06U (STMicroelectronics) | Same 3A/600V rating but higher VF (1.7 V) and slower trr (75 ns); TO-220AC package | Requires heatsink for same power level; unsuitable for space-constrained DO-201AD layouts | Select when higher VR (600 V) is mandatory and board area permits TO-220 footprint |
| ES3D (Vishay) | 3A/200V, VF = 0.95 V, trr = 35 ns; SMA package, lower thermal resistance (RθJA = 45°C/W) | SMT-compatible only; not pin-compatible with DO-201AD through-hole mounting | Select for surface-mount designs prioritizing speed over voltage rating and requiring reflow assembly |
Compared with STTH3L06U and ES3D, HER301G uniquely balances 50 V VR, 1.0 V VF, 50 ns trr, and DO-201AD through-hole compatibility-making it optimal for cost-sensitive, thermally constrained 24–48 V industrial power supplies where layout reuse and manual repairability matter.
Availability
HER301G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for HER301G 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 automotive markets.
The HER301G belongs to TSC's high-efficiency ultrafast rectifier product line, engineered specifically for high-frequency switching power supplies where low VF, fast trr, and rugged surge capability are critical to system efficiency and reliability.
FAQ
What is the maximum junction temperature rating for HER301G?
The HER301G has a maximum junction temperature (TJ) of +150°C, with operational range from –55°C to +150°C. This rating allows reliable use in enclosed industrial power supplies and automotive under-hood environments when thermal design accounts for RθJL = 10°C/W and ambient conditions. HER301G must be derated above 75°C case temperature per the forward current derating curve.
Is HER301G pin-compatible with other HER30xG series devices?
Yes, all HER301G through HER308G share identical DO-201AD package dimensions, lead spacing, and polarity marking (cathode band), making them mechanically interchangeable on the same PCB footprint. However, electrical parameters differ significantly-especially VRRM, VF, and trr-so substitution requires validation against circuit voltage stress and thermal limits.
Does HER301G meet automotive qualification standards?
The base HER301G is not AEC-Q101 qualified, but the HER301GH variant-identical in all electrical and mechanical specs except for added automotive qualification-is available. HER301GH undergoes stress testing per AEC-Q101 including HTSL, TC, and UHAST, and is marked with "H" suffix per ordering code. Use HER301GH for automotive body electronics and infotainment power rails.
What is the reverse leakage current specification for HER301G at elevated temperature?
HER301G specifies reverse leakage current (IR) of ≤10 µA at 50 V and 25°C, and ≤200 µA at 50 V and 125°C. This elevated-temperature leakage remains well within acceptable limits for most 24 V and 48 V power systems, ensuring minimal standby power loss even in hot chassis environments.
How does the thermal performance of HER301G compare between junction-to-lead and junction-to-ambient?
HER301G has RθJL = 10°C/W and RθJA = 35°C/W. This 3.5× difference confirms that effective thermal design must prioritize conduction from the cathode lead to copper pour or heatsink-ambient convection alone yields excessive temperature rise. For example, at 3 A and 1.0 V VF (3 W dissipation), ΔTJL = 30°C, but ΔTJA would reach 105°C without thermal enhancement.
HER301G 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 FAQ
1.How can I place an order for HER301G through Aetrix?
Please submit a Request for Quotation (RFQ) for HER301G 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 reliable?
The price and inventory of HER301G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER301G is usually 5 days.
3.What payment methods are accepted for HER301G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER301G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER301G?
HER301G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER301G 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?
For technical support, including HER301G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER301G requirements.
6.How does Aetrix verify that HER301G is sourced from the original manufacturer or authorized distributors?
All HER301G 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 meets industry standards.
7.What is the process for return or replacement of HER301G?
All HER301G units undergo pre-shipment inspection (PSI). If there is an issue with HER301G, 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 part is unused and in its original packaging.
Return procedure for HER301G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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