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Taiwan Semiconductor Corporation HER205GH
- Part No.:
- HER205GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER205GH.pdf
- Description:
- 50NS, 2A, 400V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
HER205GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101 qualified ultrafast recovery rectifier diode in DO-204AC (DO-15) package, rated for 2 A average forward current, 400 V repetitive peak reverse voltage, and 1.3 V forward voltage at 2 A and 25°C - used in automotive DC-DC converters and switching inverters.
For engineers reviewing the HER205GH datasheet, HER205GH pinout, HER205GH application, or HER205GH equivalent, key selection criteria include its 400 V VRRM, 50 ns reverse recovery time, 60 A surge capability, AEC-Q101 qualification, and DO-15 mechanical compatibility with standard through-hole power supply layouts.
Technical Context
This device is a single-die, glass-passivated silicon junction rectifier optimized for high-frequency switching applications. Its ultrafast recovery (trr = 50 ns) and low forward voltage (VF = 1.3 V @ 2 A) reduce conduction and switching losses in SMPS topologies.
The HER205GH operates across –55°C to +150°C junction temperature range, features 35 pF junction capacitance at 1 MHz/4 V, and delivers 60 A non-repetitive surge current under 8.3 ms half-sine conditions - enabling robust freewheeling and clamp functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/clamp circuits |
| IF | 2 A - continuous average forward current; sets thermal design baseline for PCB copper and heatsinking |
| trr | 50 ns - ultrafast reverse recovery time; minimizes switching loss and EMI in >100 kHz converters |
| VF | 1.3 V @ 2 A, 25°C - low conduction drop improves efficiency vs. standard fast rectifiers |
| IFSM | 60 A - peak surge rating supports inrush and transient overload without failure |
| RθJA | 60 °C/W - junction-to-ambient thermal resistance; guides derating above 75°C ambient |
| CJ | 35 pF @ 1 MHz, 4 V - low junction capacitance reduces capacitive coupling noise in high-dv/dt environments |
Pinout & Package
DO-204AC (DO-15) molded plastic package with axial leads; cathode indicated by band; pure tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connects to lower-potential node (e.g., switch node in boost/flyback); polarity critical for rectification |
| Cathode (lead with band) | Forward current exit / reverse blocking terminal | Connects to higher-potential output rail; withstands up to 400 V reverse bias during off-state |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements (HTOL, TC, HAST, etc.) |
| Glass passivated junction | Enhances moisture resistance and long-term reliability in humid or thermally cycled environments |
| Ultrafast recovery (50 ns) | Enables efficient operation in 100–500 kHz switching converters without excessive ringing or loss |
| Low VF (1.3 V) | Reduces conduction loss by ~15% vs. comparable 400 V fast rectifiers, improving thermal margin |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally restricted materials |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12 V to 48 V bidirectional DC-DC conversion in 48 V mild-hybrid vehicle architectures. IC Role / Device Role / Timing Role: HER205GH serves as synchronous rectifier or freewheeling diode in phase-shifted full-bridge topology. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; 50 ns trr suppresses shoot-through risk during high-frequency PWM control. | Use Scenario: Output rectification in 3 kW industrial UPS inverters operating at 200 kHz switching frequency. IC Role / Device Role / Timing Role: HER205GH functions as output freewheeling diode in LLC resonant converter secondary side. Use Value: 1.3 V VF lowers conduction loss by 0.26 W vs. legacy 1.55 V diodes at 2 A, reducing heatsink size by 30%. |
| Server Power Supply Clamp Circuits | Renewable Energy Charge Controllers |
Use Scenario: Snubberless clamp diode in active-clamp forward converters for telecom rectifiers. IC Role / Device Role / Timing Role: HER205GH absorbs leakage inductance energy during MOSFET turn-off with minimal voltage overshoot. Use Value: 400 V VRRM provides 2× margin over 200 V bus; 35 pF CJ limits capacitive feedthrough into gate drive paths. | Use Scenario: Battery-side rectification in solar charge controllers managing 36 V nominal PV arrays. IC Role / Device Role / Timing Role: HER205GH blocks reverse current from battery to panel at night while handling 2 A charging current. Use Value: –55°C to +150°C TJ range supports outdoor deployment in desert or arctic climates without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R04 | Same VRRM (400 V), identical DO-15 package, but trr = 35 ns and VF = 1.25 V; not AEC-Q101 qualified | Suitable for industrial/commercial SMPS where automotive qualification is unnecessary | Select STTH2R04 when faster recovery and slightly lower VF outweigh AEC-Q101 requirement |
| ES2D-E3/57T | Lower VRRM (200 V), same IF and DO-15 package; trr = 35 ns, VF = 1.15 V; no AEC-Q101 | Limited to ≤200 V systems (e.g., 12/24 V outputs); unsuitable for 400 V bus applications | Choose ES2D-E3/57T only for cost-sensitive, non-automotive 200 V designs requiring lowest VF |
Compared with STTH2R04 and ES2D-E3/57T, the HER205GH uniquely combines AEC-Q101 qualification, 400 V blocking, and 50 ns recovery - making it the sole option for automotive-grade 400 V rectification where reliability and voltage margin are mandatory.
Availability
HER205GH is available at Aetrix Electronics and suitable for automotive power modules, industrial UPS systems, and renewable energy charge controllers requiring stable component supply with long-term lifecycle assurance.
Supply support for HER205GH 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 automotive, industrial, and consumer markets since 1979.
The HER20xG series was developed specifically for high-reliability, high-frequency power conversion - targeting AEC-Q101-compliant rectification in next-generation EV subsystems and compact industrial SMPS.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the HER205GH?
The HER205GH has a VRRM of 400 V, verified per Taiwan Semiconductor's G2105 datasheet. This rating defines the highest reverse voltage the device can block repeatedly without breakdown. It is strictly limited to 400 V - not interchangeable with HER206GH (600 V) or HER204GH (300 V) in voltage-critical designs. Designers must maintain ≥20% margin over system peak reverse transients.
Is the HER205GH AEC-Q101 qualified, and what does that cover?
Yes, the "H" suffix in HER205GH explicitly denotes AEC-Q101 qualification per Taiwan Semiconductor's ordering information. This includes HTOL (high-temperature operating life), temperature cycling, humidity testing, and mechanical shock validation. The HER205GH meets all stress tests required for automotive power electronics - unlike standard HER205G - and is traceable to certified production lots.
What is the forward voltage (VF) of the HER205GH at rated current?
The HER205GH exhibits a typical forward voltage of 1.3 V at 2 A and 25°C, as specified in the Electrical Specifications table. At 125°C junction temperature, VF decreases slightly (~1.15 V). This value is measured under pulsed conditions (0.3 ms PW) to avoid self-heating; continuous DC operation requires thermal derating per the forward current derating curve.
Does the HER205GH have a defined reverse recovery time (trr), and how is it tested?
Yes, the HER205GH has a maximum reverse recovery time of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per Fig.6 test circuit. This ultrafast recovery enables clean commutation in high-frequency converters. The trr is guaranteed across –55°C to +125°C; values increase marginally at elevated temperatures but remain <65 ns.
What package type and lead finish does the HER205GH use?
The HER205GH uses the DO-204AC (DO-15) axial package with pure tin-plated leads, fully compliant with J-STD-002 for solderability. The molding compound meets UL 94V-0 flammability rating, and polarity is marked by a cathode band. Weight is approximately 0.400 g. No lead-free exemptions or alternate finishes are offered for this variant.
HER205GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER205GH FAQ
1.How can I place an order for HER205GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HER205GH 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 HER205GH reliable?
The price and inventory of HER205GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER205GH is usually 5 days.
3.What payment methods are accepted for HER205GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER205GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER205GH?
HER205GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER205GH 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 HER205GH?
For technical support, including HER205GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER205GH requirements.
6.How does Aetrix verify that HER205GH is sourced from the original manufacturer or authorized distributors?
All HER205GH 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 HER205GH meets industry standards.
7.What is the process for return or replacement of HER205GH?
All HER205GH units undergo pre-shipment inspection (PSI). If there is an issue with HER205GH, 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 HER205GH part is unused and in its original packaging.
Return procedure for HER205GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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