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Taiwan Semiconductor Corporation HER201G-T
- Part No.:
- HER201G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER201G-T.pdf
- Description:
- 50NS, 2A, 50V, HIGH EFFICIENT RE
- Quantity:
- Payment:
- Shipping:
Inventory:9,769
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Product details
Overview
HER201G-T from Taiwan Semiconductor is a 2 A, 50 V fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 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 efficient freewheeling and output rectification.
For engineers reviewing the HER201G-T datasheet, HER201G-T pinout, HER201G-T application, or HER201G-T equivalent, key selection criteria include repetitive peak reverse voltage (50 V), surge current rating (60 A), thermal resistance (60 °C/W), junction temperature limit (+150 °C), and RoHS/halogen-free compliance.
Technical Context
This single-die, glass-passivated fast recovery rectifier operates with low conduction loss due to its 1.0 V typical forward voltage at 2 A and 25 °C, and achieves rapid turn-off via controlled carrier lifetime, yielding 50 ns reverse recovery time under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A test conditions.
Its DO-204AC (DO-15) package supports through-hole mounting with pure tin-plated leads compliant with J-STD-002 solderability, and exhibits 60 °C/W junction-to-ambient thermal resistance, enabling reliable operation up to +150 °C junction temperature in ambient-limited power conversion stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Average Forward Current) | 2 A - Sustained DC current handling capability without derating at TA = 25 °C |
| VRRM (Repetitive Peak Reverse Voltage) | 50 V - Maximum allowable reverse-biased voltage before breakdown in repetitive operation |
| IFSM (Surge Peak Forward Current) | 60 A - Short-duration (8.3 ms half-sine) overload tolerance for startup or fault transients |
| VF (Forward Voltage) | 1.0 V max at 2 A, 25 °C - Directly determines conduction loss (2 W max per diode at full load) |
| trr (Reverse Recovery Time) | 50 ns max - Limits switching losses and EMI in high-frequency SMPS operating up to ~200 kHz |
| TJ max (Maximum Junction Temperature) | +150 °C - Sets thermal design margin for heatsinking and ambient temperature derating |
| RθJA (Junction-to-Ambient Thermal Resistance) | 60 °C/W - Enables thermal calculation of junction rise above ambient for PCB layout planning |
Pinout & Package
HER201G-T is a two-terminal axial-leaded device in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode and cathode terminals are unidirectional, with no internal connection between leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., switch node or transformer secondary center-tap) |
| Cathode | Current exit terminal during forward conduction; marked by band | Connected to output rail or filter capacitor positive; defines polarity-sensitive placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Low VF (1.0 V max @ 2 A) | Reduces forward conduction loss by ≥15% compared to standard recovery rectifiers at same current |
| Fast trr (50 ns max) | Enables higher switching frequencies with lower diode-induced ringing and EMI in flyback/forward topologies |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental regulations for industrial and consumer end equipment |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 5–24 V DC-DC converters delivering up to 2 A continuous output. IC Role / Device Role / Timing Role: Unidirectional current steering diode converting transformer AC output to regulated DC, operating at 100–200 kHz switching frequency. Use Value: 1.0 V VF minimizes power loss (≤2 W), while 50 ns trr suppresses voltage overshoot during MOSFET turn-on transitions. | Use Scenario: Freewheeling path for inductive loads (e.g., motor windings or solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Clamp-inductive kickback energy during PWM off-time, conducting only during flyback intervals. Use Value: 60 A IFSM withstands motor stall surges; 50 V VRRM exceeds typical bus voltage margins in 24–48 V systems. |
| AC-DC Adapter Secondary Rectifier | Industrial Power Supply Snubber Diode |
Use Scenario: Output rectification in compact wall adapters supplying 5–12 V/2 A for IoT gateways and embedded controllers. IC Role / Device Role / Timing Role: Fast-recovery rectifier replacing slower 1N400x series to improve efficiency and reduce heat sink size. Use Value: 60 °C/W RθJA allows direct PCB copper pour cooling; DO-15 footprint ensures drop-in replacement compatibility. | Use Scenario: Snubber network diode in flyback or forward converter clamp circuits dissipating leakage energy. IC Role / Device Role / Timing Role: Conducts transient clamping current during MOSFET turn-off, requiring fast turn-off to avoid re-conduction. Use Value: 50 ns trr prevents delayed turn-off that would increase snubber dissipation and stress primary switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R06 | Same 2 A / 60 V rating; VF = 1.15 V max; trr = 65 ns; TO-220AC package | Requires PCB mount change (TO-220 vs. DO-15); higher thermal mass but better heatsinking | Preferred when higher surge margin or forced-air cooling is needed; not drop-in |
| ES2D | 2 A / 200 V; VF = 0.95 V typ; trr = 35 ns; SMA package | SMD-only; lower voltage rating unsuitable for >100 V designs; smaller footprint | Selected for space-constrained SMT layouts where 50 V rating suffices and 35 ns trr improves EMI |
Compared with STTH2R06 and ES2D, HER201G-T offers lowest-cost through-hole implementation with balanced VF/trr trade-off at 50 V, ideal for cost-sensitive, medium-frequency AC-DC and DC-DC designs where DO-15 mounting is preferred.
Availability
HER201G-T is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for HER201G-T 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 consumer markets since 1979.
The HER20xG-T series is part of TSC's fast recovery rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in cost-sensitive switching power supplies and motor control systems.
FAQ
What is the maximum repetitive peak reverse voltage rating for HER201G-T?
The HER201G-T has a VRRM rating of 50 V, meaning it can block up to 50 V of reverse voltage repeatedly without breakdown. This value is fixed for the HER201G-T variant and differs from higher-voltage members like HER202G-T (100 V) and HER206G-T (600 V). Exceeding 50 V risks avalanche failure and must be avoided in circuit design.
What is the forward voltage drop of HER201G-T at rated current?
The HER201G-T exhibits a maximum forward voltage (VF) of 1.0 V at 2 A and 25 °C, measured under pulsed conditions (PW = 0.3 ms). At elevated junction temperatures (e.g., 125 °C), VF decreases slightly, but system-level loss calculations should use the 1.0 V max value for worst-case thermal design of the HER201G-T.
Does HER201G-T have RoHS and halogen-free compliance?
Yes, HER201G-T is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its pure tin-plated leads satisfy J-STD-002 solderability requirements. These certifications are confirmed in Taiwan Semiconductor's official documentation for the HER201G-T version B2105 release.
What package type does HER201G-T use, and what are its mechanical features?
HER201G-T uses the DO-204AC (DO-15) axial-leaded package. It features a glass-passivated die, cathode band marking, pure tin-plated leads, and weighs approximately 0.400 g. The package complies with JESD 201 Class 1A whisker testing and is rated for storage and operation from –55 °C to +150 °C.
How does the reverse recovery time of HER201G-T affect switching performance?
The HER201G-T has a maximum reverse recovery time (trr) of 50 ns under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A conditions. This fast recovery reduces switching losses and voltage spikes in high-frequency converters (e.g., >100 kHz flyback), directly improving efficiency and easing EMI filtering requirements for the HER201G-T in practical layouts.
HER201G-T 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):
- 50 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 @ 50 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
HER201G-T FAQ
1.How can I place an order for HER201G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for HER201G-T 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 HER201G-T reliable?
The price and inventory of HER201G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER201G-T is usually 5 days.
3.What payment methods are accepted for HER201G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER201G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER201G-T?
HER201G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER201G-T 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 HER201G-T?
For technical support, including HER201G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER201G-T requirements.
6.How does Aetrix verify that HER201G-T is sourced from the original manufacturer or authorized distributors?
All HER201G-T 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 HER201G-T meets industry standards.
7.What is the process for return or replacement of HER201G-T?
All HER201G-T units undergo pre-shipment inspection (PSI). If there is an issue with HER201G-T, 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 HER201G-T part is unused and in its original packaging.
Return procedure for HER201G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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