My Inquiry
My Account
Taiwan Semiconductor Corporation HT18G A1G
- Part No.:
- HT18G A1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
HT18G A1G.pdf
- Description:
- DIODE GEN PURP 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:7,060
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HT18G A1G from Taiwan Semiconductor is a 1 A, 1000 V glass-passivated high-efficiency rectifier diode in TS-1 package, featuring VF = 1.7 V at 1 A and IFSM = 30 A, designed for freewheeling and switching-mode power conversion in automotive-grade DC-DC converters.
For engineers reviewing the HT18G A1G datasheet, HT18G A1G pinout, HT18G A1G application, or HT18G A1G equivalent, key selection criteria include peak reverse voltage (1000 V), forward surge capability (30 A), thermal resistance (95 °C/W), junction temperature range (–55 to +150 °C), and AEC-Q101 qualification status.
Technical Context
This device is a single-die, unidirectional silicon rectifier optimized for high-voltage, medium-current switching applications. Its glass-passivated junction ensures robustness against moisture and contamination, while the TS-1 package supports surface-mount assembly with pure tin-plated leads compliant with J-STD-002 solderability.
The HT18G A1G operates with low reverse recovery time (trr ≤ 75 ns) and low junction capacitance (CJ = 10 pF at 1 MHz, VR = 4.0 V), enabling efficient high-frequency operation in SMPS and inverters without excessive switching losses or EMI generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports isolation and blocking in 800 V bus systems with safety margin |
| IF | 1 A continuous - rated average forward current under specified thermal conditions |
| IFSM | 30 A - handles short-duration inrush/surge events without failure |
| VF @ 1 A, 25°C | 1.7 V - determines conduction loss and thermal load in high-duty-cycle operation |
| trr | ≤ 75 ns - limits switching loss and noise in ≥100 kHz converters |
| RθJA | 95 °C/W - defines maximum power dissipation before exceeding TJ(max) = 150 °C on standard PCB |
| IR @ 1000 V, 25°C | ≤ 5 µA - ensures minimal leakage in high-impedance hold-up or sensing circuits |
Pinout & Package
Package: TS-1 - surface-mount, single-anode/single-cathode configuration with cathode band marking; meets UL 94V-0, JESD201 Class 2 whisker resistance, and RoHS/halogen-free requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or inductor node; blocks 1000 V reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements |
| Glass-passivated junction | Prevents corrosion and parametric drift in humid or chemically aggressive environments |
| Low VF (1.7 V) | Reduces conduction loss by ~15% vs. comparable 1000 V rectifiers with VF > 1.9 V |
| High IFSM (30 A) | Survives repetitive inductive kickback in motor drive or relay control without derating |
| TS-1 package | Enables automated SMT placement and reflow compatibility with IPC-J-STD-020 profile |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12 V to 48 V bidirectional converter in 48 V mild-hybrid vehicle architecture. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck-boost topology, conducting during low-side switch off-time. Use Value: 1000 V VRRM withstands transients up to ISO 7637-2 Pulse 5a; AEC-Q101 qualification ensures reliability over 15-year vehicle life. | Use Scenario: Output rectification stage in 3 kW solar microinverter with 600 V DC input. IC Role / Device Role / Timing Role: High-voltage output rectifier handling 1 A continuous current with fast trr to minimize switching loss. Use Value: 75 ns trr and 10 pF CJ reduce EMI and improve efficiency above 50 kHz switching frequency. |
| UPS Hold-Up Circuits | AC-DC Adapter Secondary Side |
Use Scenario: Energy storage discharge path in line-interactive UPS maintaining 24 V output during AC outage. IC Role / Device Role / Timing Role: Unidirectional current path from capacitor bank to DC-DC regulator, blocking reverse flow. Use Value: Low IR (≤5 µA) preserves stored charge over hours; 150 °C TJ(max) enables compact heatsinkless design. | Use Scenario: Secondary-side rectification in 65 W laptop adapter with universal AC input. IC Role / Device Role / Timing Role: Output rectifier in flyback converter, conducting during transformer reset phase. Use Value: 1.7 V VF balances conduction loss and thermal rise at 1 A; TS-1 footprint fits tight layout constraints. |
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 | VRRM = 600 V, VF = 1.3 V @ 1 A, trr = 50 ns, TO-220AC package | Limited to ≤600 V systems; higher thermal mass but requires through-hole mounting | Select when lower VF and faster recovery are prioritized over voltage rating and SMT compatibility |
| ONsemi MUR1100E | VRRM = 1000 V, VF = 1.7 V @ 1 A, trr = 75 ns, DO-41 package | Through-hole DO-41; no AEC-Q101 qualification; RθJA ≈ 120 °C/W | Choose for cost-sensitive industrial designs where automotive qualification and SMT are not required |
Compared with STTH1R06 and MUR1100E, HT18G A1G uniquely combines 1000 V rating, AEC-Q101 compliance, TS-1 SMT packaging, and 95 °C/W thermal resistance-enabling compact, automotive-qualified, high-reliability rectification where space, qualification, and thermal performance are jointly constrained.
Availability
HT18G A1G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and UPS hold-up circuits requiring stable component supply with long-term lifecycle assurance.
Supply support for HT18G A1G 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 HT11G–HT18G series was developed specifically for high-reliability, high-voltage rectification in automotive power systems and industrial SMPS, emphasizing AEC-Q101 qualification, glass passivation, and TS-1 SMT compatibility.
FAQ
What is the peak repetitive reverse voltage rating of HT18G A1G?
The HT18G A1G has a peak repetitive reverse voltage (VRRM) rating of 1000 V. This value is confirmed in the Absolute Maximum Ratings table across all versions of the HT11G–HT18G family, with HT18G explicitly assigned 1000 V. It defines the maximum reverse-biased voltage the device can block repeatedly without breakdown under normal operating conditions.
Is HT18G A1G qualified to AEC-Q101 standards?
Yes, HT18G A1G is AEC-Q101 qualified. The "A1G" suffix in the ordering code indicates AEC-Q101 qualification per the Ordering Information section, and the Features list explicitly states "AEC-Q101 qualified available" for the HT11G–HT18G series. This qualification covers stress tests including HTGB, HTRB, and temperature cycling.
What is the forward voltage drop of HT18G A1G at 1 A and 25°C?
The forward voltage drop (VF) of HT18G A1G is 1.7 V at IF = 1 A and TJ = 25°C, as specified in the Electrical Specifications table under "HT16G – HT18G" grouping. This value is measured under pulse conditions (PW = 0.3 ms) and represents typical conduction loss at rated current.
What package type does HT18G A1G use, and what are its key mechanical properties?
HT18G A1G uses the TS-1 surface-mount package. Key mechanical properties include UL 94V-0 molding compound, pure tin-plated leads compliant with J-STD-002, JESD201 Class 2 whisker resistance, cathode polarity indicated by band marking, and approximate weight of 0.200 g. Dimensions are defined in the Package Outline Drawings section.
What is the maximum junction temperature and thermal resistance of HT18G A1G?
The maximum junction temperature (TJ max) of HT18G A1G is 150 °C, and its junction-to-ambient thermal resistance (RθJA) is 95 °C/W under standard test conditions. These values are listed in the Absolute Maximum Ratings and Thermal Performance sections, respectively, and define safe operating limits and power dissipation capability on standard PCB layouts.
HT18G A1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Discontinued at Digi-Key
- 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 A1G FAQ
1.How can I place an order for HT18G A1G through Aetrix?
Please submit a Request for Quotation (RFQ) for HT18G A1G 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 A1G reliable?
The price and inventory of HT18G A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HT18G A1G is usually 5 days.
3.What payment methods are accepted for HT18G A1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HT18G A1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HT18G A1G?
HT18G A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HT18G A1G 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 A1G?
For technical support, including HT18G A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HT18G A1G requirements.
6.How does Aetrix verify that HT18G A1G is sourced from the original manufacturer or authorized distributors?
All HT18G A1G 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 A1G meets industry standards.
7.What is the process for return or replacement of HT18G A1G?
All HT18G A1G units undergo pre-shipment inspection (PSI). If there is an issue with HT18G A1G, 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 A1G part is unused and in its original packaging.
Return procedure for HT18G A1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HT18G A1G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
