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Taiwan Semiconductor Corporation HER203G
- Part No.:
- HER203G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER203G.pdf
- Description:
- DIODE GEN PURP 200V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,734
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Product details
Overview
HER203G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 2 A average forward current and 200 V repetitive peak reverse voltage, with low 1.0 V forward voltage at 2 A and 50 ns reverse recovery time - used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the HER203G datasheet, HER203G pinout, HER203G application, or HER203G equivalent, key selection criteria include its DO-204AC (DO-15) package, AEC-Q101 qualification option, junction temperature range (−55°C to +150°C), and surge capability (60 A IFSM).
Technical Context
This single-die, axial-leaded rectifier features a glass-passivated PN junction for enhanced reliability and moisture resistance. Its 50 ns reverse recovery time and 1.0 V VF at 2 A support high-frequency switching operation in SMPS topologies.
The device operates across −55°C to +150°C junction temperature, with 60 °C/W junction-to-ambient thermal resistance and 5 µA max reverse leakage at 25°C - enabling stable performance in compact, thermally constrained power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 2 A - supports continuous output current in 20–50 W DC-DC converters |
| VRRM | 200 V - blocks up to 200 V reverse voltage in flyback and buck-derived topologies |
| VF @ 2 A | 1.0 V - reduces conduction loss to ~2 W per diode at full load |
| trr | 50 ns - enables operation up to ~2 MHz switching frequency with minimal switching loss |
| IFSM (8.3 ms) | 60 A - withstands inrush and transient surges without failure |
| TJ max | +150 °C - allows use in sealed enclosures or high-ambient industrial environments |
| CJ @ 1 MHz | 35 pF - limits capacitive coupling noise in high-dV/dt gate-drive or snubber circuits |
Pinout & Package
HER203G uses the DO-204AC (DO-15) axial package: molded epoxy body, pure tin-plated leads, cathode indicated by a band, weight ≈ 0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to input/source side in freewheeling or output rectification paths |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to load/switch node; polarity marking prevents reverse installation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Prevents moisture ingress and metallization corrosion - extends lifetime in humid or automotive under-hood environments |
| Low VF (1.0 V @ 2 A) | Reduces power dissipation by ~15% vs. standard FR-type diodes - lowers heatsink requirements |
| 50 ns trr | Minimizes reverse recovery charge (Qrr) - critical for ZVS/ZCS soft-switching and EMI reduction |
| AEC-Q101 qualified version available | Validated for automotive powertrain and body electronics - meets stress-test requirements for vibration, temperature cycling, and HTOL |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24 V input → 5 V/3.3 V output flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current path that conducts during transformer reset phase and blocks reverse voltage. Use Value: 1.0 V VF minimizes conduction loss at 2 A load; 50 ns trr suppresses ringing and EMI during turn-off. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss return path for inductive kickback current when main switch turns off. Use Value: 60 A IFSM handles repetitive surge currents; DO-15 package enables through-hole mounting on high-current PCB traces. |
| Buck-Derived Point-of-Load Supply | Industrial AC-DC Front-End Bridge Leg |
Use Scenario: Synchronous rectification replacement in non-isolated buck regulators powering FPGAs or ASICs. IC Role / Device Role / Timing Role: High-speed uncontrolled rectifier in asynchronous buck topology where MOSFET sync is not implemented. Use Value: 200 V VRRM supports 12–24 V input rails with margin; 35 pF CJ limits capacitive feedthrough into control circuitry. | Use Scenario: Individual leg in discrete bridge rectifiers for 100–240 VAC input industrial PSUs. IC Role / Device Role / Timing Role: One of four diodes forming full-wave rectification stage before bulk capacitor filtering. Use Value: Glass passivation ensures long-term reliability under thermal cycling; RoHS/halogen-free compliance meets industrial safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R02 | Same IF (2 A), VRRM (200 V), but VF = 1.15 V typ @ 2 A; trr = 35 ns | Lower trr suits higher-frequency designs (>500 kHz); slightly higher VF increases conduction loss | Prefer STTH2R02 where switching speed dominates thermal design; HER203G preferred where VF-limited efficiency is critical |
| ES2D | Same DO-15 package, IF = 2 A, VRRM = 200 V, but VF = 0.95 V typ @ 2 A; trr = 35 ns; no AEC-Q101 option | Lower VF improves light-load efficiency; lacks automotive qualification and glass passivation | Select ES2D for cost-sensitive consumer power supplies; HER203G remains optimal for automotive or harsh-environment use |
Compared with STTH2R02 and ES2D, HER203G offers the best balance of low VF (1.0 V), robust glass passivation, and AEC-Q101 availability - making it ideal for industrial and automotive auxiliary power supplies where reliability and thermal stability outweigh marginal trr advantages.
Availability
HER203G is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, long-lifecycle assurance, and RoHS/halogen-free compliance.
Supply support for HER203G 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 automotive markets since 1979.
HER203G belongs to TSC's high-efficiency rectifier product line, designed specifically for high-frequency, high-reliability power conversion in space-constrained and thermally demanding applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for HER203G?
The HER203G has a VRRM rating of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation. This value is specified in the Absolute Maximum Ratings table and is distinct from VR(RMS) (140 V) and breakdown voltage. Designers must ensure circuit peak reverse transients remain below this limit to prevent avalanche failure.
Does HER203G have AEC-Q101 qualification?
The base HER203G is not AEC-Q101 qualified; however, the variant HER203GH (with "H" suffix) is explicitly qualified per AEC-Q101. This qualification includes stress testing for temperature cycling, high-temperature operating life, and mechanical shock - required for automotive under-hood and powertrain applications.
What is the forward voltage drop (VF) of HER203G at 2 A and 25°C?
The HER203G exhibits a typical forward voltage drop of 1.0 V at 2 A and TJ = 25°C, as confirmed in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating, and actual VF rises with junction temperature - reaching ~1.15 V at 125°C.
What package type does HER203G use, and are lead finishes RoHS-compliant?
HER203G uses the DO-204AC (DO-15) axial package with pure tin-plated leads, fully compliant with J-STD-002 solderability standards. The molding compound is RoHS-compliant and halogen-free per IEC 61249-2-21, and the entire construction meets UL 94V-0 flammability requirements.
How does the reverse recovery time (trr) of HER203G compare to HER205G and HER208G?
HER203G has a trr of 50 ns (max), while HER205G and HER208G are rated at 50 ns and 75 ns respectively - confirming that trr remains at 50 ns through HER205G, then increases for higher-voltage variants. This reflects optimized doping profiles for mid-range voltage devices, balancing speed and breakdown capability.
HER203G 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):
- 200 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER203G FAQ
1.How can I place an order for HER203G through Aetrix?
Please submit a Request for Quotation (RFQ) for HER203G 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 HER203G reliable?
The price and inventory of HER203G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER203G is usually 5 days.
3.What payment methods are accepted for HER203G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER203G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER203G?
HER203G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER203G 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 HER203G?
For technical support, including HER203G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER203G requirements.
6.How does Aetrix verify that HER203G is sourced from the original manufacturer or authorized distributors?
All HER203G 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 HER203G meets industry standards.
7.What is the process for return or replacement of HER203G?
All HER203G units undergo pre-shipment inspection (PSI). If there is an issue with HER203G, 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 HER203G part is unused and in its original packaging.
Return procedure for HER203G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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