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Taiwan Semiconductor Corporation HER302G B0G
- Part No.:
- HER302G B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER302G B0G.pdf
- Description:
- DIODE GEN PURP 100V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,363
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Product details
Overview
HER302G from Taiwan Semiconductor is a high-efficiency, ultra-fast recovery silicon rectifier diode in DO-201AD package, rated for 3A average forward current, 100V repetitive peak reverse voltage (VRRM), and 125A non-repetitive surge current (IFSM). It delivers low forward voltage drop (VF = 1.0 V at IF = 3A, TJ = 25°C) and fast reverse recovery time (trr = 50 ns), making it suitable for high-frequency switching power supplies and freewheeling paths in DC-DC converters.
For engineers reviewing the HER302G datasheet, HER302G pinout, HER302G application, or HER302G equivalent, key selection criteria include its 100V VRRM rating, 50 ns trr, DO-201AD mechanical outline, cathode-band polarity marking, and compatibility with lead-free reflow soldering per J-STD-002.
Technical Context
This device is a single-die, planar-junction, ultra-fast recovery rectifier optimized for high-frequency switching operation. Its 50 ns reverse recovery time and 60 pF junction capacitance at 1 MHz / 4.0 V enable reduced switching losses in SMPS topologies operating above 50 kHz.
The HER302G operates across a junction temperature range of –55°C to +150°C, with thermal resistance RθJL = 10°C/W and RθJA = 35°C/W. It supports AEC-Q101 qualification when ordered with "H" suffix (e.g., HER302GH), though HER302G itself is standard industrial grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling clamp circuits |
| IF(AV) | 3 A - Continuous average forward current at TC = 75°C; determines heatsink sizing in conduction-limited designs |
| IFSM | 125 A - Peak non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients without failure |
| VF | 1.0 V @ 3 A, 25°C - Low conduction loss improves efficiency in high-duty-cycle DC-DC stages |
| trr | 50 ns - Ultra-fast recovery minimizes switching loss and EMI in >100 kHz converters |
| CJ | 60 pF @ 1 MHz, VR = 4.0 V - Low junction capacitance reduces capacitive turn-on loss and noise coupling |
| TJ max | +150°C - Enables operation in thermally constrained environments such as enclosed power modules |
Pinout & Package
Package: DO-201AD - Axial-leaded, molded plastic case with pure tin-plated leads compliant with J-STD-002 solderability; polarity indicated by cathode band; weight ≈1.10 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or positive bus; blocks reverse voltage up to 100 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery | trr = 50 ns enables efficient operation in 100–500 kHz SMPS without snubber networks |
| Low forward voltage | VF = 1.0 V at 3 A reduces conduction loss by ~15% vs. standard FR series at same current |
| High surge robustness | IFSM = 125 A supports repeated cold-start surges in automotive and industrial 12 V input systems |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| Junction temperature range | –55°C to +150°C allows deployment in under-hood automotive, outdoor telecom, and industrial motor drives |
Applications
| DC-DC Converter Output Rectification | Switch-Mode Power Supply Freewheel Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V/3 A flyback converter powering industrial PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current conduction during transformer reset phase; handles 3 A DC load with minimal VF-related loss. Use Value: 1.0 V VF and 50 ns trr reduce total power loss by 0.8 W vs. standard FR302, improving thermal margin at 75°C ambient. | Use Scenario: Freewheel path in synchronous buck converter driving a 24 V, 2.5 A solenoid actuator in factory automation. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when high-side MOSFET is off; clamps inductive kickback. Use Value: 125 A IFSM withstands repeated 10 A inrush spikes during actuator cycling; DO-201AD mechanical stability ensures long-term reliability. |
| AC-DC Adapter Secondary Rectifier | UPS Inverter Output Stage |
Use Scenario: Output rectifier in 19 V/3 A laptop adapter using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Conducts forward current during secondary conduction interval; blocks reverse voltage during primary switch-on phase. Use Value: 60 pF CJ and 50 ns trr suppress high-frequency ringing and EMI, easing EMC compliance without added RC snubbers. | Use Scenario: Anti-parallel diode in 48 V DC bus H-bridge in-line UPS inverters delivering clean 230 V AC sine wave. IC Role / Device Role / Timing Role: Provides bidirectional current path during PWM dead-time; recovers before next switching edge. Use Value: Consistent 50 ns trr across –55°C to +125°C ensures predictable timing margin in real-time control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | VRRM = 600 V, VF = 1.15 V @ 3 A, trr = 35 ns, SOD-123FL package | Higher voltage rating but surface-mount; unsuitable for axial-leaded board layouts | Select when higher reverse voltage margin or PCB space constraints require SMT packaging |
| ON Semi MUR3020CT | Dual common-cathode configuration, VRRM = 200 V per diode, VF = 1.1 V @ 3 A, trr = 35 ns, TO-220AC package | Includes dual die in single package; requires different footprint and thermal mounting | Choose for dual-output or interleaved converter designs needing matched diodes on shared heatsink |
Compared with STTH3L06S and MUR3020CT, the HER302G offers optimal balance of 100 V rating, axial DO-201AD fit, and 50 ns trr for cost-sensitive, through-hole DC-DC and freewheeling applications where layout and thermal interface match legacy axial designs.
Availability
HER302G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode power supplies, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for HER302G 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 global industrial, computing, and consumer markets since 1979.
The HER301G–HER308G family is designed specifically for high-efficiency, high-reliability rectification in switching power supplies, emphasizing ultra-fast recovery, low VF, and robust surge handling across the 50–1000 V range.
FAQ
What is the maximum junction temperature rating for HER302G?
The HER302G has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version I2105. This rating enables reliable operation in high-ambient environments such as enclosed power enclosures or under-hood automotive locations. Derating curves confirm usable current capacity down to 1.5 A at TC = 100°C, ensuring design margin for thermal management.
Is HER302G RoHS and halogen-free compliant?
Yes, HER302G is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and the pure tin-plated leads meet J-STD-002 solderability requirements. These compliance attributes are explicitly stated in the "Features" and "Mechanical Data" sections of the Taiwan Semiconductor HER301G–HER308G datasheet.
What is the reverse recovery time (trr) of HER302G and how is it measured?
The HER302G has a typical reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value applies to the full HER301G–HER305G subgroup and reflects performance at TA = 25°C with pulse test methodology defined in Note 1.
Does HER302G have AEC-Q101 qualification?
No, HER302G is not AEC-Q101 qualified. Only variants with the "H" suffix (e.g., HER302GH) are AEC-Q101 qualified, as noted in the Ordering Information section. HER302G is rated for industrial-grade reliability and meets JESD 201 Class 2 whisker testing, but automotive qualification requires explicit "H" ordering code and associated test documentation.
What is the marking code and package type of HER302G?
The HER302G is marked "HER302G" on the device body and packaged in DO-201AD - an axial-leaded, molded plastic case with cathode band polarity indication. The DO-201AD outline includes standardized dimensions (length ≈ 9.5 mm, diameter ≈ 3.6 mm), UL 94V-0 flammability rating, and 1.10 g typical weight, all confirmed in the Mechanical Data and Package Outline Dimensions sections of the datasheet.
HER302G B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 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 @ 100 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
HER302G B0G FAQ
1.How can I place an order for HER302G B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for HER302G B0G 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 HER302G B0G reliable?
The price and inventory of HER302G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER302G B0G is usually 5 days.
3.What payment methods are accepted for HER302G B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER302G B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER302G B0G?
HER302G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER302G B0G 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 HER302G B0G?
For technical support, including HER302G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER302G B0G requirements.
6.How does Aetrix verify that HER302G B0G is sourced from the original manufacturer or authorized distributors?
All HER302G B0G 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 HER302G B0G meets industry standards.
7.What is the process for return or replacement of HER302G B0G?
All HER302G B0G units undergo pre-shipment inspection (PSI). If there is an issue with HER302G B0G, 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 HER302G B0G part is unused and in its original packaging.
Return procedure for HER302G B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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