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Taiwan Semiconductor Corporation HER102G-K
- Part No.:
- HER102G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
HER102G-K.pdf
- Description:
- 50NS, 1A, 100V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
HER102G-K from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 1 A average forward current and 100 V repetitive peak reverse voltage, with 30 A surge capability and low 1.0 V forward voltage at 1 A, used in switching-mode power supplies and freewheeling paths.
For engineers reviewing the HER102G-K datasheet, HER102G-K pinout, HER102G-K application, or HER102G-K equivalent, key selection factors include its DO-41 package, 50 ns reverse recovery time, 15 °C/W junction-to-case thermal resistance, and suitability for DC-DC converters requiring fast recovery and low conduction loss.
Technical Context
This device is a single-die, standard-recovery (but optimized fast-recovery) silicon PN junction rectifier with glass passivation for enhanced reliability and moisture resistance. It operates across –55 °C to +150 °C junction temperature range and supports 8.3 ms half-sine surge currents up to 30 A.
Designed for high-frequency switching applications, HER102G-K delivers low VF (1.0 V @ 1 A, 25 °C) and tight reverse leakage (≤5 µA @ 25 °C, ≤150 µA @ 125 °C), with junction capacitance of 15 pF at 4 V reverse bias and 1 MHz - enabling efficient operation in SMPS output stages and snubber-free freewheeling circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum non-repetitive reverse voltage the diode blocks without breakdown; defines usable input/output voltage headroom in DC-DC designs. |
| IF(AV) | 1 A - Continuous average forward current rating at TA = 75 °C; determines heatsinking requirements in steady-state power conversion. |
| VF @ 1 A | 1.0 V - Forward voltage drop at rated DC current; directly impacts conduction loss (1.0 W per diode at 1 A) and thermal design. |
| trr | 50 ns - Reverse recovery time under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables stable operation up to ~200 kHz switching frequencies. |
| RθJC | 15 °C/W - Junction-to-case thermal resistance; allows direct mounting to heatsink or PCB copper for thermal management. |
| IR @ 25°C | ≤5 µA - Max reverse leakage at rated VR and room temperature; critical for low-power standby and high-impedance sensing nodes. |
Pinout & Package
HER102G-K uses the DO-204AL (DO-41) axial-leaded through-hole package with cathode indicated by a band. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path or transformer secondary center-tap). |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive or DC bus); polarity must match layout to prevent catastrophic failure. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term operation in humid or contaminated environments without degradation in leakage or breakdown performance. |
| 150 °C max junction temperature | Supports operation in sealed enclosures or high-ambient industrial settings without derating below full 1 A current. |
| 30 A IFSM (8.3 ms) | Withstands inrush and transient overloads common during cold-start or fault conditions in offline SMPS and motor drives. |
| RoHS & halogen-free compliance | Fulfills IPC/JEDEC environmental standards (IEC 61249-2-21) for lead-free assembly and end-of-life recycling. |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at up to 1 A. IC Role / Device Role / Timing Role: Unidirectional current steering element converting high-frequency AC from transformer into regulated DC output. Use Value: Low 1.0 V VF minimizes conduction loss; 50 ns trr avoids cross-conduction losses and EMI spikes during MOSFET turn-on transitions. | Use Scenario: Freewheeling path across inductive loads (e.g., relay coils, solenoids, BLDC phase windings) in H-bridge inverters. IC Role / Device Role / Timing Role: Clamp diode providing low-impedance return path for stored inductive energy during switch-off. Use Value: 30 A surge rating handles peak flyback currents; glass passivation ensures reliability under repeated thermal cycling and voltage reversal stress. |
| AC-DC Adapter Secondary Rectification | Industrial Power Supply Snubberless Clamping |
Use Scenario: Output rectification in compact wall adapters (e.g., 12 V/1 A) using quasi-resonant or fixed-frequency flyback topologies. IC Role / Device Role / Timing Role: Main output rectifier conducting during transformer demagnetization phase. Use Value: DO-41 package fits standard through-hole footprints; 15 °C/W RθJC allows direct PCB copper pour cooling without external heatsink. | Use Scenario: Clamp diode in low-cost, discrete snubberless flyback or forward converters where RC snubbers are omitted. IC Role / Device Role / Timing Role: Voltage clamp limiting peak reverse stress on primary-side switches during leakage inductance energy release. Use Value: 100 V VRRM provides sufficient margin above reflected output voltage; 15 pF junction capacitance limits capacitive coupling noise into control circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | Same 1 A / 600 V rating but higher VF (1.7 V typ), slower trr (75 ns), TO-220AC package | Requires heatsink for >0.5 A continuous use; suited for higher-voltage, lower-frequency industrial supplies | Select HER102G-K when board space, cost, and low-loss 100 V operation are prioritized over higher voltage headroom. |
| 1N4934 | Same DO-41 package, 1 A / 100 V, but standard recovery (trr > 200 ns), higher VF (1.2 V min) | Limited to ≤50 kHz operation; higher switching loss and EMI in modern SMPS | HER102G-K offers 4× faster recovery and 0.2 V lower VF - preferred for efficiency-critical or high-frequency designs. |
Compared with STTH1R06 and 1N4934, HER102G-K delivers optimal balance of low VF, fast recovery, and compact DO-41 packaging for cost-sensitive, space-constrained 100 V rectification - without requiring heatsinks or sacrificing high-frequency stability.
Availability
HER102G-K 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 RoHS-compliant manufacturing.
Supply support for HER102G-K 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer power systems.
HER101G-K to HER108G-K is TSC's high-efficiency rectifier family targeting cost-effective, reliable replacement of legacy 1N400x and 1N540x series in modern switching power supplies - emphasizing low VF, fast trr, and robust thermal performance in standard packages.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for HER102G-K?
The HER102G-K has a VRRM rating of 100 V, meaning it reliably blocks up to 100 V of reverse voltage in repetitive operation. This value is specified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2104) and defines the upper limit for safe reverse-bias operation in applications like DC-DC output rectification or freewheeling clamping.
Does HER102G-K have a fast recovery time, and what is its typical value?
Yes, HER102G-K is classified as a high-efficiency rectifier with fast recovery characteristics. Its typical reverse recovery time (trr) is 50 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A - confirmed in the Electrical Specifications section of the Taiwan Semiconductor datasheet. This enables clean switching in power supplies operating up to ~200 kHz.
What package type does HER102G-K use, and are its leads lead-free?
HER102G-K uses the DO-204AL (DO-41) axial-leaded through-hole package. Its leads are pure tin plated and fully compliant with J-STD-002 solderability requirements. The device is RoHS-compliant and halogen-free per IEC 61249-2-21, making it suitable for lead-free reflow and wave soldering processes.
What is the forward voltage drop (VF) of HER102G-K at 1 A and 25 °C?
The forward voltage drop of HER102G-K is 1.0 V maximum at IF = 1 A and TJ = 25 °C, as specified in the Electrical Specifications table. This low VF contributes to reduced conduction losses and improved efficiency compared to standard recovery diodes like the 1N4004, especially in thermally constrained designs.
Is HER102G-K suitable for use in automotive-grade power supplies?
HER102G-K is not qualified to AEC-Q101 or automotive-specific reliability standards. While it operates from –55 °C to +150 °C junction temperature and meets JEDEC whisker testing (Class 1A), Taiwan Semiconductor explicitly states these devices are "not designed for use in medical, life-saving, or life-sustaining applications." For automotive applications, consult TSC's AEC-Q101-certified rectifier portfolio or perform full qualification per OEM requirements.
HER102G-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER102G-K FAQ
1.How can I place an order for HER102G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER102G-K 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 HER102G-K reliable?
The price and inventory of HER102G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER102G-K is usually 5 days.
3.What payment methods are accepted for HER102G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER102G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER102G-K?
HER102G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER102G-K 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 HER102G-K?
For technical support, including HER102G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER102G-K requirements.
6.How does Aetrix verify that HER102G-K is sourced from the original manufacturer or authorized distributors?
All HER102G-K 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 HER102G-K meets industry standards.
7.What is the process for return or replacement of HER102G-K?
All HER102G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER102G-K, 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 HER102G-K part is unused and in its original packaging.
Return procedure for HER102G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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