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Taiwan Semiconductor Corporation 1T4GH
- Part No.:
- 1T4GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1T4GH.pdf
- Description:
- 1A, 400V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
1T4GH from Taiwan Semiconductor is a 400 V, 1 A standard rectifier diode in TS-1 package, featuring 30 A surge capability, 1.0 V max forward voltage at 1 A and 25°C, and AEC-Q101 qualification for automotive-grade reliability in DC/DC converters and switching inverters.
For engineers reviewing the 1T4GH datasheet, 1T4GH pinout, 1T4GH application, or 1T4GH equivalent, key selection criteria include repetitive peak reverse voltage (400 V), forward current rating (1 A), thermal resistance (100 °C/W), AEC-Q101 compliance status, and TS-1 package compatibility with high-density board layouts.
Technical Context
This single-die standard rectifier operates with unidirectional conduction, cathode-banded polarity, and junction temperature range from –55°C to +150°C. It delivers 30 A non-repetitive surge current (8.3 ms half-sine) and maintains ≤5 µA reverse leakage at 25°C under rated reverse voltage.
The device uses pure tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Its 10 pF junction capacitance at 1 MHz / 4 V enables stable performance in high-frequency switching applications up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in bridge or freewheeling configurations |
| IF | 1 A - Continuous average forward current; determines steady-state power dissipation and heatsink requirements |
| IFSM | 30 A - Peak non-repetitive surge current (8.3 ms); supports inrush and transient overload tolerance |
| VF max | 1.0 V @ 1 A, 25°C - Forward voltage drop directly impacts conduction loss and thermal design in SMPS |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under given power dissipation |
| Junction capacitance | 10 pF @ 1 MHz, 4 V - Low capacitance minimizes switching losses and EMI in high-frequency rectification |
Pinout & Package
TS-1 package: 3 mm miniature molded body, cathode-indicated band, pure tin-plated leads, UL 94V-0 rated compound, 0.200 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; must withstand full reverse voltage when off |
| Cathode | Forward current exit point | Marked by band; connects to higher-potential node; carries full load current and dissipates heat |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and UHAST |
| Low VF (1.0 V max) | Reduces conduction loss by ~15% vs. comparable 1A rectifiers with 1.15 V VF, improving efficiency in 12–48 V DC/DC stages |
| 30 A IFSM | Enables robust operation during startup surges in industrial motor drives and UPS systems without derating |
| TS-1 miniature package | 3 mm footprint supports high-density PCB layouts in space-constrained power modules and onboard chargers |
Applications
| Automotive DC/DC Converters | Industrial Switching Inverters |
|---|---|
Use Scenario: Step-down conversion in 12 V/48 V dual-battery automotive systems with frequent load transients. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck topology, conducting during low-side switch off-time. Use Value: AEC-Q101 qualification ensures reliability across –40°C to +125°C ambient; 30 A IFSM handles cold-crank surges. | Use Scenario: Output rectification in 3 kW industrial AC/DC front-end inverters with 60 Hz–20 kHz switching. IC Role / Device Role / Timing Role: Unidirectional current path in voltage-doubler or full-wave bridge configuration. Use Value: 400 V VRRM supports 280 V RMS input; 100 °C/W RθJA enables natural convection cooling in enclosed enclosures. |
| Telecom Power Supplies | Consumer Adapter Rectification |
Use Scenario: Secondary-side rectification in 48 V telecom brick supplies with tight efficiency targets (80 PLUS Titanium). IC Role / Device Role / Timing Role: Main output rectifier in active-clamp forward or LLC resonant converter. Use Value: 1.0 V VF reduces conduction loss by 0.1 W vs. 1.1 V alternatives at 1 A, improving full-load efficiency by ~0.3%. | Use Scenario: Input-stage rectification in universal-input (90–264 VAC) wall adapters for smart home devices. IC Role / Device Role / Timing Role: Bridge leg component handling 50/60 Hz line frequency and harmonic content. Use Value: TS-1 package fits compact 25 mm² board area; RoHS/halogen-free compliance meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same 400 V VRRM, 1 A IF, but TO-220AC package (larger footprint, lower RθJA = 50 °C/W) | Requires heatsink for >0.5 A continuous use; unsuitable for ultra-thin or high-density layouts | Select when thermal budget is constrained but board space allows TO-220 mounting |
| ON Semi MUR140 | Ultrafast recovery (trr = 50 ns vs. 1T4GH's ~2 µs), same 400 V/1 A ratings and DO-41 footprint | Better suited for >100 kHz switching; higher VF (1.3 V) increases conduction loss in low-frequency applications | Select when EMI reduction or zero-voltage switching timing demands faster recovery |
Compared with STTH1R04 and MUR140, the 1T4GH offers optimal balance of AEC-Q101 qualification, TS-1 miniaturization, and low VF for cost-sensitive, space-limited 400 V rectification where ultrafast recovery is unnecessary.
Availability
1T4GH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switching inverters, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for 1T4GH 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 1T1G–1T7G series was designed specifically for high-reliability, cost-optimized standard rectification in automotive and industrial power conversion, emphasizing AEC-Q101 compliance, miniature packaging, and consistent forward voltage performance across voltage grades.
FAQ
What is the maximum junction temperature rating for the 1T4GH?
The 1T4GH has a maximum junction temperature (TJ) of +150°C and a minimum of –55°C. This wide operating range supports deployment in under-hood automotive environments and industrial enclosures without forced cooling. Derating curves in the datasheet define allowable average forward current versus ambient temperature, ensuring safe operation within this thermal envelope.
Is the 1T4GH pin-compatible with other devices in the 1T1G–1T7G family?
Yes, all 1T1G–1T7G variants-including the 1T4GH-share identical TS-1 package dimensions, lead pitch, and cathode-band polarity marking. They are mechanically interchangeable on PCBs; only VRRM (400 V for 1T4GH) and minor VF variations differ between grades. No layout change is needed when upgrading/downgrading voltage rating within this family.
Does the 1T4GH meet RoHS and halogen-free requirements?
Yes, the 1T4GH complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and terminals are pure tin-plated to meet J-STD-002 solderability standards. These qualifications are confirmed in TSC's official product change notices and material declarations.
What is the reverse leakage current specification for the 1T4GH at elevated temperature?
At 125°C junction temperature and rated reverse voltage (400 V), the 1T4GH exhibits a maximum reverse leakage current (IR) of 100 µA. At 25°C, the limit is 5 µA. These values are measured under pulsed conditions (30 ms pulse width) and reflect stable blocking behavior critical for standby power and hold-up time integrity in offline power supplies.
How does the AEC-Q101 qualification of the 1T4GH impact its use in non-automotive applications?
The AEC-Q101 qualification of the 1T4GH validates enhanced robustness-including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-making it suitable for demanding industrial, medical auxiliary, and outdoor-rated equipment where long-term reliability is critical. Designers benefit from tighter parametric distributions and extended lifetime projections even outside automotive end-use.
1T4GH 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):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 150°C
1T4GH FAQ
1.How can I place an order for 1T4GH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1T4GH 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 1T4GH reliable?
The price and inventory of 1T4GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1T4GH is usually 5 days.
3.What payment methods are accepted for 1T4GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1T4GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1T4GH?
1T4GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1T4GH 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 1T4GH?
For technical support, including 1T4GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1T4GH requirements.
6.How does Aetrix verify that 1T4GH is sourced from the original manufacturer or authorized distributors?
All 1T4GH 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 1T4GH meets industry standards.
7.What is the process for return or replacement of 1T4GH?
All 1T4GH units undergo pre-shipment inspection (PSI). If there is an issue with 1T4GH, 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 1T4GH part is unused and in its original packaging.
Return procedure for 1T4GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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