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Taiwan Semiconductor Corporation HT18G
- Part No.:
- HT18G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
HT18G.pdf
- Description:
- DIODE GEN PURP 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HT18G from Taiwan Semiconductor is a 1000V, 1A glass-passivated high-efficiency rectifier diode in TS-1 package, featuring 1.7V forward voltage at 1A and 75ns reverse recovery time, designed for freewheeling and switching-mode power conversion in automotive and industrial DC-DC systems.
For engineers reviewing the HT18G datasheet, HT18G pinout, HT18G application, or HT18G equivalent, key selection criteria include its 1000V repetitive peak reverse voltage, AEC-Q101 qualification option (HT18GH), 30A surge current rating, and TS-1 package compatibility with high-reliability surface-mount assembly.
Technical Context
The HT18G operates as a single-die, unidirectional silicon rectifier optimized for high-voltage switching applications. Its 1000V VRRM, 75ns trr, and 1.7V VF at 1A reflect trade-offs favoring voltage robustness over ultra-fast recovery-distinct from lower-voltage HT11G–HT15G variants with faster trr and lower VF.
Thermally, it exhibits 95°C/W junction-to-ambient resistance in TS-1 package and supports operation from –55°C to +150°C. The glass-passivated junction and pure tin-plated leads meet JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in offline SMPS up to 800V DC bus |
| IF | 1 A continuous - rated for sustained conduction in low-power DC-DC stages |
| IFSM | 30 A (8.3ms) - withstands inrush and transient surges without failure |
| VF | 1.7 V @ 1A, 25°C - defines conduction loss in thermal budget calculations |
| trr | 75 ns - limits switching losses in 100–500 kHz converters |
| Junction temp | –55°C to +150°C - enables under-hood automotive use without derating |
| Package | TS-1 - surface-mount outline with cathode band polarity marking |
Pinout & Package
TS-1 package: molded plastic case meeting UL 94V-0, pure tin-plated leads solderable per J-STD-002, cathode indicated by band, weight ≈0.200g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode | Current exit terminal | Marked by band; ties to output rail or ground return in flyback/forward topologies |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage performance across temperature and humidity stress |
| AEC-Q101 qualified version available (HT18GH) | Validated for automotive powertrain and body electronics per stress test requirements |
| High surge capability (30A) | Eliminates need for external surge limiting in compact converter designs |
| Halogen-free & RoHS compliant | Meets IPC/JEDEC industry standards for green manufacturing and end-of-life handling |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12V-to-48V bidirectional converter in 48V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectification stage, clamping inductive kickback during high-side switch off-time. Use Value: 1000V VRRM provides margin against transients exceeding 600V bus spikes; 75ns trr minimizes commutation loss at 200kHz switching. | Use Scenario: Auxiliary power supply in motor drive inverters converting 3-phase AC to regulated 24V control rail. IC Role / Device Role / Timing Role: Output rectifier in flyback transformer secondary winding. Use Value: 1.7V VF reduces conduction loss at 1A load; TS-1 package allows automated placement on dense control board layouts. |
| Telecom Power Rectification | Renewable Energy Interface |
Use Scenario: Input rectification stage in telecom -48V backup power modules accepting 90–264V AC input. IC Role / Device Role / Timing Role: Bridge leg component in full-wave rectifier configuration feeding PFC front-end. Use Value: 30A IFSM handles cold-start surges; glass passivation ensures long-term reliability in 24/7 base station environments. | Use Scenario: Voltage-clamping diode in solar microinverter DC link protection circuitry. IC Role / Device Role / Timing Role: Transient suppression device shunting overvoltage events to ground during lightning-induced surges. Use Value: 1000V VRRM exceeds IEC 61000-4-5 Level 4 immunity requirements; 150µA IR at 125°C maintains low standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 600V VRRM, 65ns trr, TO-220AC package | Limited to ≤600V systems; requires through-hole mounting and heatsinking | Select when higher speed and thermal mass outweigh voltage and footprint constraints |
| SB1100 | 1000V VRRM, 1.1A IF, DO-41 package | Lower current rating and axial-leaded form factor unsuitable for automated SMT lines | Choose only for prototyping or low-volume repairs where TS-1 reflow compatibility is unavailable |
Compared with STTH1R06 and SB1100, the HT18G uniquely combines 1000V rating, 1A SMT-rated current, and 75ns recovery in TS-1-enabling compact, automotive-grade, high-voltage rectification without layout or thermal redesign.
Availability
HT18G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching-mode inverters, and telecom power rectification requiring stable component supply and long-term lifecycle support.
Supply support for HT18G 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 automotive, industrial, and consumer markets since 1979.
The HT18G belongs to TSC's HT-series high-efficiency rectifier family, engineered specifically for high-voltage, high-reliability power conversion where glass passivation, AEC-Q101 compliance, and tight parametric consistency are critical.
FAQ
What is the maximum repetitive peak reverse voltage of the HT18G?
The HT18G has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, verified per the manufacturer's absolute maximum ratings table. This rating applies at TA = 25°C and defines the highest reverse-biased voltage the HT18G can block continuously without breakdown. Derating is required above 25°C ambient per the forward current derating curve in the datasheet.
Is the HT18G AEC-Q101 qualified?
The standard HT18G is not AEC-Q101 qualified, but the variant HT18GH is explicitly listed as AEC-Q101 qualified in the ordering information section. HT18GH shares identical electrical and thermal specifications with HT18G and adds automotive-grade stress testing validation-including temperature cycling, HTRB, and ESD-making it suitable for under-hood automotive applications.
What is the forward voltage drop of the HT18G at rated current?
The HT18G exhibits a typical forward voltage (VF) of 1.7 V at IF = 1 A and TJ = 25°C, as specified in the electrical characteristics table. This value increases with junction temperature and must be used with the thermal resistance (RθJA = 95°C/W) to calculate actual operating VF in system-level thermal models.
What package type does the HT18G use, and what are its key mechanical features?
The HT18G uses the TS-1 surface-mount package, defined in the mechanical data section. Key features include UL 94V-0 compliant molding compound, pure tin-plated leads compliant with J-STD-002 solderability, JESD201 Class 2 whisker resistance, and cathode polarity marked by a visible band. Its approximate weight is 0.200 g.
How does the reverse recovery time of the HT18G compare to lower-voltage variants in the HT series?
The HT18G has a reverse recovery time (trr) of 75 ns, which is higher than HT11G–HT15G (50 ns) due to its higher voltage rating and associated carrier lifetime trade-off. This difference is documented in the electrical specifications table and confirmed in Figure 6's reverse recovery characteristic curves, where HT16G–HT18G share the same trr bin.
HT18G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 150°C
HT18G FAQ
1.How can I place an order for HT18G through Aetrix?
Please submit a Request for Quotation (RFQ) for HT18G 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 HT18G reliable?
The price and inventory of HT18G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HT18G is usually 5 days.
3.What payment methods are accepted for HT18G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HT18G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HT18G?
HT18G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HT18G 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 HT18G?
For technical support, including HT18G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HT18G requirements.
6.How does Aetrix verify that HT18G is sourced from the original manufacturer or authorized distributors?
All HT18G 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 HT18G meets industry standards.
7.What is the process for return or replacement of HT18G?
All HT18G units undergo pre-shipment inspection (PSI). If there is an issue with HT18G, 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 HT18G part is unused and in its original packaging.
Return procedure for HT18G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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