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Taiwan Semiconductor Corporation TUAS4GH
- Part No.:
- TUAS4GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS4GH.pdf
- Description:
- 4A, 400V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAS4GH from Taiwan Semiconductor is a 4A, 400V glass-passivated standard surface-mount rectifier in TO-277A (SMPC4.6U) package, AEC-Q101 qualified, with 120A surge capability and 0.95V forward voltage at 4A/25°C, used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the TUAS4GH datasheet, TUAS4GH pinout, TUAS4GH application, or TUAS4GH equivalent, key selection criteria include peak reverse voltage (400V), junction-to-lead thermal resistance (5.2°C/W), wettable flank design for solder inspection, moisture sensitivity level 1, and AEC-Q101 qualification for automotive reliability.
Technical Context
This single-die standard rectifier uses a glass-passivated PN junction to achieve high surge robustness (IFSM = 120A at 8.3ms) and stable reverse leakage (<5µA at 25°C, <10µA at 125°C). Its TO-277A package features matte tin-plated leads compliant with J-STD-002 and JESD 201 Class 2 whisker testing.
Thermal performance is characterized with RθJL = 5.2°C/W and RθJA = 46°C/W on a 16mm × 16mm Cu pad PCB. Junction capacitance is 33pF at 1MHz/4V for TUAS4GH, supporting moderate-frequency switching in snubber and flyback auxiliary winding applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating range in DC-DC input rectification. |
| IF | 4 A - Continuous average forward current; supports sustained power delivery in automotive lighting drivers. |
| IFSM | 120 A - Non-repetitive surge current (8.3ms); enables reliable operation during load dump transients. |
| VF @ 4A/25°C | 0.95 V max - Low conduction loss reduces heat generation and improves efficiency in space-constrained modules. |
| RθJL | 5.2 °C/W - Low junction-to-lead thermal resistance allows direct thermal path to PCB copper, easing thermal management. |
| CJ | 33 pF - Junction capacitance at 1MHz/4V; influences snubber tuning and EMI behavior in flyback clamp networks. |
Pinout & Package
TO-277A (SMPC4.6U) surface-mount package with cathode-indicating band; matte tin-plated leads, wettable flank geometry for automated optical solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; requires adequate copper area for thermal dissipation. |
| Cathode | Forward current exit point | Marked by band; ties to higher-potential node; critical for polarity-sensitive snubber placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical stress-enables use in under-hood ECUs. |
| Glass passivated junction | Enhances long-term reliability against moisture ingress and surface contamination in harsh environments. |
| Wettable flank leads | Enables automated AOI detection of solder fillet height and voiding-reduces post-reflow inspection cost. |
| Moisture sensitivity level 1 | No floor-life limitation or baking requirement before reflow-simplifies SMT line logistics and inventory handling. |
Applications
| Automotive DC-DC Converter | LED Headlamp Driver |
|---|---|
Use Scenario: Secondary-side rectification in 12V-to-5V/3.3V buck-derived isolated converters powering ADAS sensors. IC Role / Device Role / Timing Role: Standard rectifier providing unidirectional current flow with low VF and high IFSM tolerance for transient surges. Use Value: 0.95V VF minimizes conduction loss at 4A load; AEC-Q101 rating ensures functional safety compliance over vehicle lifetime. | Use Scenario: High-side switch snubber network in constant-current LED driver stages for adaptive front lighting. IC Role / Device Role / Timing Role: Snubber diode clamping voltage spikes across MOSFET drain during turn-off transitions. Use Value: 400V VRRM withstands reflected transients; 33pF CJ enables precise RC time constant tuning for EMI suppression. |
| Car Interior Lighting | Industrial Power Supply Auxiliary Winding |
Use Scenario: Input rectification in 24V-to-12V non-isolated buck converters powering dashboard backlighting and infotainment USB ports. IC Role / Device Role / Timing Role: Main AC/DC rectifier delivering continuous 4A output with minimal thermal rise on compact PCBs. Use Value: RθJL = 5.2°C/W enables direct thermal coupling to 16mm² copper pour-no heatsink required at full load. | Use Scenario: Rectification of auxiliary winding voltage in industrial 48V offline SMPS for bias supply generation. IC Role / Device Role / Timing Role: Low-leakage rectifier supplying gate drive and controller IC bias under light-load and standby conditions. Use Value: IR ≤ 5µA at 25°C ensures negligible standby current draw; TO-277A footprint fits tight layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04DJF | 4A/400V, TO-277A, VF = 0.92V typ @ 4A, RθJA = 50°C/W, not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial power supplies only | Select when AEC-Q101 is not required and slightly lower VF is prioritized |
| VS-4EYH04-M3 | 4A/400V, SMAF package (smaller footprint), VF = 0.98V max @ 4A, IFSM = 100A, no wettable flank | Smaller outline limits thermal mass; lacks wettable flank for AOI-requires X-ray or manual inspection | Select when board space is constrained and automated optical inspection is not mandated |
Compared with STTH4R04DJF and VS-4EYH04-M3, TUAS4GH uniquely combines AEC-Q101 qualification, wettable flank geometry, and 5.2°C/W RθJL-making it the preferred choice for thermally demanding, automotive-grade rectification where process traceability and reliability validation are mandatory.
Availability
TUAS4GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and industrial auxiliary power supplies requiring stable component supply across production lifecycles.
Supply support for TUAS4GH 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 TUAS4GH belongs to TSC's AEC-Q101-qualified standard rectifier family, engineered specifically for high-reliability automotive power conversion where surge immunity, thermal stability, and process-controlled packaging are essential.
FAQ
What is the peak repetitive reverse voltage rating for TUAS4GH?
The TUAS4GH has a peak repetitive reverse voltage (VRRM) rating of 400 V. This value is specified in the Absolute Maximum Ratings table and defines the maximum reverse-biased voltage the device can block repeatedly without breakdown. It is validated per JEDEC standards and confirmed in the manufacturer's datasheet revision A2111.
Is TUAS4GH qualified for automotive applications?
Yes, TUAS4GH is AEC-Q101 qualified. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The qualification status is explicitly stated in the FEATURES section of the official datasheet and applies to the TUAS4GH variant within the TUAS4xH family.
What is the forward voltage drop of TUAS4GH at rated current?
The TUAS4GH exhibits a maximum forward voltage (VF) of 1.10 V at 4 A and 25°C, with a typical value of 0.95 V under the same conditions. At elevated junction temperature (125°C), VF drops to 0.85 V typical. These values are measured per pulse test conditions (PW = 0.3 ms) and documented in the Electrical Specifications table.
Does TUAS4GH have wettable flank leads?
Yes, TUAS4GH features wettable flank leads as confirmed in the FEATURES list and Mechanical Data section. This design enables automated optical inspection (AOI) of solder fillets on the side profile of the TO-277A package, improving process control in high-volume automotive SMT lines.
What is the thermal resistance from junction to lead for TUAS4GH?
The junction-to-lead thermal resistance (RθJL) of TUAS4GH is 5.2°C/W, measured under standardized test conditions using a 16 mm × 16 mm copper pad PCB. This parameter is critical for estimating die temperature rise when the lead is thermally anchored to a large copper plane, and it is published in the Thermal Performance table of the datasheet.
TUAS4GH 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):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 4 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 33pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMPC4.6U
- Operating Temperature - Junction:
- -55°C ~ 150°C
TUAS4GH FAQ
1.How can I place an order for TUAS4GH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS4GH 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 TUAS4GH reliable?
The price and inventory of TUAS4GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS4GH is usually 5 days.
3.What payment methods are accepted for TUAS4GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS4GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS4GH?
TUAS4GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS4GH 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 TUAS4GH?
For technical support, including TUAS4GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS4GH requirements.
6.How does Aetrix verify that TUAS4GH is sourced from the original manufacturer or authorized distributors?
All TUAS4GH 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 TUAS4GH meets industry standards.
7.What is the process for return or replacement of TUAS4GH?
All TUAS4GH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS4GH, 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 TUAS4GH part is unused and in its original packaging.
Return procedure for TUAS4GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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