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Taiwan Semiconductor Corporation TUAS8GH
- Part No.:
- TUAS8GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS8GH.pdf
- Description:
- 8A, 400V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAS8GH from Taiwan Semiconductor is a single-die, AEC-Q101-qualified standard surface-mount rectifier rated for 8A average forward current and 400V repetitive peak reverse voltage in TO-277A (SMPC4.6U) package. It delivers low forward voltage (0.96V max at 8A/25°C), low leakage (5µA max at 25°C), and high surge capability (230A IFSM), enabling use in automotive DC-DC converters and lighting systems.
For engineers reviewing the TUAS8GH datasheet, TUAS8GH pinout, TUAS8GH application, or TUAS8GH equivalent, key selection criteria include its 400V VRRM rating, wettable flank terminals for solder-joint inspection, JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and compatibility with automated SMT placement on PCBs with 16mm × 16mm Cu pads.
Technical Context
The TUAS8GH operates as a unidirectional silicon junction rectifier with a single die configuration. Its thermal design targets junction-to-lead resistance of 4°C/W and junction-to-ambient resistance of 38°C/W when mounted on a standardized test board, supporting continuous 8A conduction up to 150°C junction temperature.
Electrical behavior is defined by forward voltage characteristics across temperature (0.87V typ at 8A/125°C), reverse leakage that rises to 16µA at 125°C, and junction capacitance of 62pF at 1MHz/4V - consistent with TUAS8DH–TUAS8JH variants and distinct from TUAS8KH/TUAS8MH's 54pF value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum reverse voltage the device blocks reliably in repetitive operation |
| IF(AVG) | 8 A - continuous forward current rating under specified thermal conditions |
| IFSM (8.3ms) | 230 A - non-repetitive surge current handling for transient protection in power circuits |
| VF @ 8A/25°C | 0.96 V max - forward drop determining conduction loss and thermal load at full rated current |
| IR @ 400V/25°C | 5 µA max - reverse leakage defining off-state power loss and signal integrity in high-impedance paths |
| RθJL | 4 °C/W - thermal resistance from junction to lead, critical for estimating temperature rise under PCB trace conduction cooling |
| Junction Temp Range | −55°C to +150°C - operational range validated for automotive under-hood environments |
Pinout & Package
Package: TO-277A (SMPC4.6U) - surface-mount, 3-terminal, single-die rectifier with wettable flank leads, matte tin plating, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to lower-potential side of AC source or switching node in bridge/snubber configurations |
| Cathode | Output terminal for forward conduction | Connected to output rail or filter capacitor; marked by visible cathode band on package body |
| Lead (Case) | Thermal and mechanical interface | Electrically isolated metal tab serving as primary heat path to PCB copper; not electrically connected internally |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power electronics including engine control, lighting, and ADAS subsystems |
| Wettable flank leads | Enables automated optical inspection (AOI) of solder fillets without X-ray, improving manufacturing yield and field reliability |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing assembly cost and process complexity |
| UL 94V-0 molding compound | Ensures flame-retardant encapsulation required for automotive and industrial safety compliance |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for long-life automotive applications |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: High-efficiency buck-derived DC-DC conversion in 12V/48V hybrid vehicle architectures. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant topologies handling 8A continuous output current. Use Value: Low VF (0.96V max) reduces conduction loss and thermal stress; AEC-Q101 qualification ensures lifetime reliability under vibration and thermal cycling. | Use Scenario: Constant-current LED driver stage powering high-brightness automotive headlamps. IC Role / Device Role / Timing Role: Freewheeling diode in boost or SEPIC regulators managing inductive energy recovery during PWM dimming. Use Value: 230A IFSM withstands inrush surges; 400V VRRM accommodates transient overvoltages common in automotive battery systems. |
| Snubber Networks | Industrial Power Supplies |
Use Scenario: RC snubber across MOSFET/IGBT switches in motor drives and inverters. IC Role / Device Role / Timing Role: Fast-recovery rectifier clamping voltage spikes during switch turn-off. Use Value: Low junction capacitance (62pF) minimizes capacitive loading on switching nodes; 150°C TJ max supports operation near hot power semiconductors. | Use Scenario: Secondary-side rectification in open-frame AC-DC adapters for factory automation equipment. IC Role / Device Role / Timing Role: Primary output rectifier delivering stable 24V/5A rails to PLC I/O modules. Use Value: TO-277A package enables high-density layout; RoHS/halogen-free compliance meets EU industrial environmental directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-8EWH04-M3 | Same 400V VRRM, 8A IF, TO-277A package; VF = 0.92V typ @ 8A/25°C (slightly lower conduction loss) | Also AEC-Q101 qualified; identical wettable flank and MSL-1 rating | Preferred where marginally lower VF improves thermal margin in space-constrained designs |
| ON Semiconductor MUR840EG | Higher 400V VRRM but faster recovery (trr = 75ns vs. TUAS8GH's ~200ns); TO-220AC package (not surface-mount) | Not suitable for automated SMT assembly; requires through-hole mounting and heatsinking | Select only if fast recovery is prioritized over SMT compatibility and board area savings |
Compared with VS-8EWH04-M3, TUAS8GH offers equivalent automotive qualification and thermal performance but slightly higher VF; versus MUR840EG, TUAS8GH provides SMT integration and lower profile at the expense of recovery speed - making it optimal for cost-sensitive, high-volume automotive SMT power supplies.
Availability
TUAS8GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED lighting drivers, and industrial snubber networks requiring stable component supply, AEC-Q101 compliance, and surface-mount manufacturability.
Supply support for TUAS8GH 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 devices, ESD protection, and automotive-qualified components.
The TUAS8GH belongs to TSC's AEC-Q101-certified surface-mount rectifier family, engineered specifically for high-reliability automotive power conversion where thermal robustness, solder-joint inspectability, and long-term parametric stability are mandatory.
FAQ
What is the peak repetitive reverse voltage rating for TUAS8GH?
The TUAS8GH has a repetitive peak reverse voltage (VRRM) rating of 400 V, verified per the manufacturer's absolute maximum ratings table. This defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions. The TUAS8GH is part of a family spanning 200V to 1000V, with TUAS8GH specifically designated for the 400V variant via its AS8G marking code.
Is TUAS8GH suitable for automotive applications?
Yes, TUAS8GH is AEC-Q101 qualified and designed for automotive use, including under-hood environments. It meets JESD201 Class 2 whisker resistance, MSL Level 1 moisture sensitivity, and UL 94V-0 flammability requirements. The TUAS8GH's −55°C to +150°C junction temperature range and robust surge rating (230A IFSM) support reliability in automotive DC-DC converters and lighting systems.
What package type does TUAS8GH use, and what are its key mechanical features?
TUAS8GH uses the TO-277A (SMPC4.6U) surface-mount package - a 3-terminal, single-die rectifier with wettable flank leads, matte tin plating, and cathode band polarity marking. Its mechanical design includes UL 94V-0 molding compound, JESD201 Class 2 whisker resistance, and a weight of approximately 0.104g. The TUAS8GH's footprint supports automated optical inspection and eliminates pre-reflow baking due to MSL-1 classification.
What is the forward voltage of TUAS8GH at full rated current and room temperature?
The TUAS8GH has a maximum forward voltage (VF) of 1.10 V at 8A forward current and 25°C junction temperature, with a typical value of 0.96 V under the same conditions. This parameter is measured using pulse testing (PW = 0.3ms) to avoid self-heating effects. The TUAS8GH's VF increases slightly at elevated temperatures (0.87V typ at 125°C), reflecting standard silicon diode behavior.
Does TUAS8GH have a specified junction capacitance, and how does it vary across the family?
Yes, TUAS8GH has a typical junction capacitance (CJ) of 62 pF at 1 MHz and 4.0 V reverse bias, consistent with TUAS8DH and TUAS8JH. In contrast, TUAS8KH and TUAS8MH specify 54 pF under identical test conditions. This difference reflects internal die geometry optimization for higher-voltage variants. The TUAS8GH's 62 pF value impacts high-frequency snubber and EMI filter design in switching power supplies.
TUAS8GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-277, 3-PowerDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 8 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 62pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMPC4.6U
- Operating Temperature - Junction:
- -55°C ~ 150°C
TUAS8GH FAQ
1.How can I place an order for TUAS8GH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS8GH 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 TUAS8GH reliable?
The price and inventory of TUAS8GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS8GH is usually 5 days.
3.What payment methods are accepted for TUAS8GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS8GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS8GH?
TUAS8GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS8GH 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 TUAS8GH?
For technical support, including TUAS8GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS8GH requirements.
6.How does Aetrix verify that TUAS8GH is sourced from the original manufacturer or authorized distributors?
All TUAS8GH 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 TUAS8GH meets industry standards.
7.What is the process for return or replacement of TUAS8GH?
All TUAS8GH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS8GH, 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 TUAS8GH part is unused and in its original packaging.
Return procedure for TUAS8GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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