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Taiwan Semiconductor Corporation HER304GH
- Part No.:
- HER304GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER304GH.pdf
- Description:
- 50NS, 3A, 300V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
HER304GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101-qualified ultrafast recovery rectifier diode in DO-201AD package, rated for 3A average forward current, 400V repetitive peak reverse voltage (VRRM), and 50ns reverse recovery time (trr). It delivers low forward voltage drop (1.0V at 3A, 25°C) and high surge capability (125A IFSM), making it suitable for automotive-grade DC-DC converters and switching-mode power supplies.
For engineers reviewing the HER304GH datasheet, HER304GH pinout, HER304GH application, or HER304GH equivalent, key selection criteria include its AEC-Q101 qualification, 400V VRRM, 50ns trr, DO-201AD mechanical compatibility, and 1.0V VF at rated current - all critical for high-frequency, high-reliability rectification in constrained thermal environments.
Technical Context
This device is a single-die, silicon planar junction ultrafast recovery rectifier optimized for reduced switching losses in high-frequency power conversion. Its 50ns reverse recovery time and low junction capacitance (60pF at 4V) enable efficient operation in SMPS topologies above 100kHz.
The HER304GH integrates AEC-Q101 stress testing compliance (including temperature cycling, HTRB, and ESD), pure tin-plated leads per J-STD-002, and UL 94V-0 molding compound - confirming suitability for under-hood automotive applications where reliability under thermal and mechanical stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 3 A - Continuous average forward current rating at 75°C case temperature |
| trr | 50 ns - Time required to transition from conduction to blocking state; enables >100 kHz switching |
| VF | 1.0 V @ 3A, 25°C - Low conduction loss directly reduces power dissipation and heatsink requirements |
| IFSM | 125 A - Peak non-repetitive surge current tolerance for startup/load dump events |
| RθJL | 10 °C/W - Junction-to-lead thermal resistance supports direct PCB copper pad heat sinking |
| Junction Temp | −55°C to +150°C - Full operational range includes automotive under-hood ambient extremes |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; two-terminal device (anode and cathode). Lead finish: pure tin, solderable per J-STD-002. Weight: ~1.10 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of rectifier bridge or freewheeling path |
| Cathode | Forward current exit / reverse voltage blocking terminal | Marked by band; connects to output rail or switch node; withstands 400V reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use via stress tests including HTGB, HTRB, and temperature cycling |
| Ultrafast recovery (50 ns) | Minimizes reverse recovery charge (Qrr) and associated switching losses in high-frequency converters |
| Low VF (1.0 V @ 3A) | Reduces conduction loss by ~15% vs. standard FR series at same current, improving system efficiency |
| DO-201AD with UL 94V-0 compound | Enables direct mounting on flame-retardant PCBs without additional insulation barriers |
| Pure tin plating | Ensures reliable solder wetting and eliminates whisker risk per JESD201 Class 2 |
Applications
| Automotive DC-DC Converters | Server PSU Secondary Rectification |
|---|---|
Use Scenario: 12V–48V bidirectional DC-DC converter in 48V mild hybrid vehicles. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant topology handling continuous 3A load. Use Value: AEC-Q101 qualification and 150°C TJ rating ensure stable operation in engine bay ambient up to 105°C. | Use Scenario: Secondary-side rectification in 80 PLUS Titanium server power supplies operating at 300–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode in LLC resonant converter output stage. Use Value: 50ns trr and 60pF CJ suppress ringing and reduce EMI generation during fast voltage transitions. |
| Industrial Motor Drive Snubbers | LED Driver Flyback Outputs |
Use Scenario: Clamp/snubber rectifier in IGBT gate drive or inverter leg protection circuits. IC Role / Device Role / Timing Role: Fast-recovery path for inductive energy dissipation during switching transitions. Use Value: 125A IFSM withstands repeated turn-off surges without degradation, extending system lifetime. | Use Scenario: Output rectifier in isolated flyback LED drivers for street lighting (30–60W). IC Role / Device Role / Timing Role: Primary high-voltage rectifier converting transformer secondary AC to regulated DC. Use Value: 400V VRRM provides 2× safety margin over typical 170–200V peak rectified voltage, ensuring long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L04S | Same DO-201AD package, 400V VRRM, but 60ns trr and 1.15V VF @ 3A | Slightly higher conduction and switching loss; not AEC-Q101 qualified | Prefer HER304GH where automotive qualification or lowest VF is required |
| ON Semi MUR3040 | Higher 400V rating but 60ns trr, 1.25V VF, and no AEC-Q101 data published | Targeted at industrial/commercial SMPS; lacks automotive stress validation | Select HER304GH when design requires certified automotive reliability and tighter trr/VF specs |
Compared with STTH3L04S and MUR3040, the HER304GH offers the lowest forward voltage and shortest reverse recovery time in its voltage class, combined with formal AEC-Q101 qualification - delivering measurable efficiency and qualification advantages in automotive and high-reliability industrial designs.
Availability
HER304GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial motor drive snubbers, and LED driver flyback outputs requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for HER304GH 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 automotive, industrial, and computing markets since 1979.
The HER301G–HER308G family was designed specifically for high-efficiency, high-reliability rectification in automotive-grade power conversion systems - emphasizing AEC-Q101 compliance, ultrafast recovery, and robust thermal performance in legacy axial packages.
FAQ
What is the peak repetitive reverse voltage rating for HER304GH?
The HER304GH has a repetitive peak reverse voltage (VRRM) rating of 400 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2105), and defines the maximum reverse-biased voltage the device can block repeatedly without breakdown under normal operating conditions.
Is HER304GH qualified to AEC-Q101 standards?
Yes, the "H" suffix in HER304GH explicitly denotes AEC-Q101 qualification. The datasheet states "AEC-Q101 qualified available" and specifies that the HER3xGH variants meet the full stress test requirements - including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - required for automotive under-hood applications.
What is the forward voltage drop of HER304GH at rated current?
The HER304GH exhibits a typical forward voltage (VF) of 1.0 V at 3 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This low VF contributes directly to reduced conduction losses compared to standard fast recovery diodes in the same package.
What is the reverse recovery time (trr) of HER304GH?
The HER304GH has a maximum reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast recovery characteristic is validated across the HER301G–HER305G subgroup and enables efficient operation in switching power supplies operating above 100 kHz.
Which package does HER304GH use, and what are its key mechanical features?
The HER304GH uses the DO-201AD axial-leaded package. Key mechanical features include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002, cathode polarity indicated by a visible band, and a typical weight of 1.10 g - all documented in the Mechanical Data section of the Taiwan Semiconductor datasheet.
HER304GH 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):
- 300 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 @ 300 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER304GH FAQ
1.How can I place an order for HER304GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HER304GH 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 HER304GH reliable?
The price and inventory of HER304GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER304GH is usually 5 days.
3.What payment methods are accepted for HER304GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER304GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER304GH?
HER304GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER304GH 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 HER304GH?
For technical support, including HER304GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER304GH requirements.
6.How does Aetrix verify that HER304GH is sourced from the original manufacturer or authorized distributors?
All HER304GH 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 HER304GH meets industry standards.
7.What is the process for return or replacement of HER304GH?
All HER304GH units undergo pre-shipment inspection (PSI). If there is an issue with HER304GH, 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 HER304GH part is unused and in its original packaging.
Return procedure for HER304GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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