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Taiwan Semiconductor Corporation TUAS3KH
- Part No.:
- TUAS3KH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS3KH.pdf
- Description:
- 3A, 800V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAS3KH from Taiwan Semiconductor is a 3A, 800V AEC-Q101-qualified standard surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring glass-passivated junction, 100A surge capability, and wettable flanks for automotive-grade solder joint inspection - used in DC-DC converters and car lighting systems.
For engineers reviewing the TUAS3KH datasheet, TUAS3KH pinout, TUAS3KH application, or TUAS3KH equivalent, key selection criteria include peak reverse voltage (800 V), forward voltage at 3 A (≤1.10 V), junction-to-lead thermal resistance (5.4 °C/W), AEC-Q101 qualification, and TO-277A mechanical compatibility with automated placement.
Technical Context
This single-die standard rectifier operates with a maximum junction temperature of 150°C and supports repetitive peak reverse voltages up to 800 V. Its glass-passivated chip junction ensures reliability under high-humidity and thermal cycling conditions typical in automotive environments.
The device delivers 3 A average forward current with low forward voltage drop (0.94 V typ. at 3 A, 25°C) and exhibits 24 pF junction capacitance at 1 MHz and 4.0 V reverse bias - optimized for snubber networks and medium-frequency rectification where low capacitive loading matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input stages in 48 V–400 V DC-DC systems with safety margin against transients |
| IF | 3 A continuous - sufficient for mid-power automotive lighting drivers and auxiliary power supplies |
| IFSM | 100 A (8.3 ms) - withstands inrush and load dump surges per ISO 7637-2 |
| VF | ≤1.10 V at 3 A, 25°C - minimizes conduction loss and thermal stress in compact layouts |
| RθJL | 5.4 °C/W - enables efficient heat transfer to PCB copper pad, critical for unheatsinked automotive modules |
| CJ | 24 pF at 1 MHz, 4 V - reduces high-frequency noise coupling in snubber and EMI filter applications |
| TJ max | 150 °C - meets under-hood temperature requirements for AEC-Q101 Class 1 operation |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, single-anode/single-cathode configuration with cathode band polarity marking. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated or higher-potential rail; requires thermal relief on PCB for soldering reliability |
| Cathode | Output current exit point | Marked by visible band; ties to output capacitor ground reference and serves as primary thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST - enables use without additional qualification |
| Glass-passivated junction | Prevents moisture ingress and metallization corrosion, extending lifetime in humid under-hood environments |
| Wettable flank leads | Enables automated optical inspection (AOI) of solder fillets on side-view cameras - improves manufacturing yield traceability |
| Moisture sensitivity level 1 | No floor life limitation or baking required before reflow - simplifies SMT line logistics and reduces handling cost |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - satisfies Tier 1 automotive material declarations and recycling mandates |
Applications
| Automotive LED Headlamp Driver | 48 V–12 V DC-DC Converter |
|---|---|
Use Scenario: Rectification stage in buck-derived LED driver supplying 30–60 W headlamp arrays with PWM dimming. IC Role / Device Role / Timing Role: Primary output rectifier handling 3 A continuous current and 800 V transient clamping during load dump. Use Value: Low VF (≤1.10 V) reduces power loss and thermal footprint; AEC-Q101 rating ensures compliance with OEM reliability targets. | Use Scenario: Secondary-side rectification in isolated 48 V input, 12 V/5 A automotive DC-DC module powering infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Standard rectifier replacing Schottky in cost-sensitive designs where 800 V VRRM provides margin over 48 V × √2 × safety factor. Use Value: RθJL = 5.4 °C/W allows direct thermal coupling to 16 mm × 16 mm Cu pad - eliminates need for external heatsink. |
| Automotive Rear Combination Lamp | Snubber Network in Ignition Coil Driver |
Use Scenario: Power rectification for sequential turn signal and brake lamp control modules mounted near rear axle. IC Role / Device Role / Timing Role: Input-stage rectifier converting alternator AC to regulated DC for LED array supply. Use Value: Wettable flanks enable AOI verification of solder joints exposed to road vibration and thermal shock - critical for field failure prevention. | Use Scenario: Snubber diode across primary winding of 12 V ignition coil driver in gasoline engine control units. IC Role / Device Role / Timing Role: Clamp inductive kickback spikes up to 800 V during MOSFET turn-off. Use Value: 24 pF junction capacitance balances fast recovery with low EMI generation; 100 A IFSM absorbs single-event energy without degradation. |
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-3EYH08-M3 | Same TO-277A package, 3 A / 800 V, but not AEC-Q101 qualified; RθJA = 50 °C/W vs. TUAS3KH's 46 °C/W | Limited to industrial or non-safety-critical automotive subsystems | Select when AEC-Q101 is not mandated and cost is prioritized over qualification overhead |
| ON Semiconductor MUR3080CT | TO-220AC package, dual common-cathode configuration, 3 A / 800 V, ultrafast recovery (trr = 50 ns) | Requires PCB redesign; suited for higher-frequency switching where reverse recovery matters | Choose only if layout allows TO-220 mounting and system demands faster recovery than standard rectifiers provide |
Compared with VS-3EYH08-M3 and MUR3080CT, the TUAS3KH uniquely combines AEC-Q101 qualification, wettable flanks, and TO-277A surface-mount compatibility - making it the preferred choice for production automotive modules requiring zero-bake assembly and automated solder-joint inspection.
Availability
TUAS3KH is available at Aetrix Electronics and suitable for automotive LED lighting, 48 V DC-DC conversion, and snubber networks requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TUAS3KH 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 global automotive, industrial, and consumer markets since 1979.
The TUAS3KH belongs to TSC's AEC-Q101-qualified surface-mount rectifier product line, engineered specifically for automotive power conversion and protection applications demanding high surge robustness, thermal efficiency, and process-compatible packaging.
FAQ
What is the peak repetitive reverse voltage rating for TUAS3KH?
The TUAS3KH has a peak repetitive reverse voltage (VRRM) rating of 800 V, verified per the manufacturer's absolute maximum ratings table. This value defines the maximum allowable reverse-biased voltage the device can block continuously without breakdown. It is critical for selecting appropriate derating margins in automotive 48 V systems subject to load dump transients.
Is TUAS3KH qualified for automotive applications?
Yes, TUAS3KH is AEC-Q101 qualified per the official Taiwan Semiconductor documentation. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - confirming suitability for under-hood and body-control module applications.
What package type does TUAS3KH use, and is it compatible with automated assembly?
TUAS3KH uses the TO-277A (SMPC4.6U) surface-mount package with wettable flank leads. It is explicitly designed for automated placement and reflow soldering, meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance standards - enabling high-yield SMT line integration without manual intervention.
What is the forward voltage of TUAS3KH at rated current and temperature?
The TUAS3KH forward voltage is specified as ≤1.10 V maximum at IF = 3 A and TJ = 25°C, with typical values of 0.94 V under those conditions. At elevated junction temperature (125°C), the typical VF drops to 0.83 V - a characteristic behavior of silicon PN junctions that must be accounted for in thermal design.
Does TUAS3KH have a defined junction-to-lead thermal resistance, and why does it matter?
Yes, TUAS3KH has a junction-to-lead thermal resistance (RθJL) of 5.4 °C/W, measured per JEDEC standards on a 16 mm × 16 mm copper pad PCB. This parameter directly determines how efficiently heat flows from the die to the PCB copper, enabling accurate thermal modeling without heatsinks in space-constrained automotive modules.
TUAS3KH 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):
- 800 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 24pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC4.6U)
- Operating Temperature - Junction:
- -55°C ~ 150°C
TUAS3KH FAQ
1.How can I place an order for TUAS3KH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS3KH 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 TUAS3KH reliable?
The price and inventory of TUAS3KH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS3KH is usually 5 days.
3.What payment methods are accepted for TUAS3KH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS3KH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS3KH?
TUAS3KH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS3KH 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 TUAS3KH?
For technical support, including TUAS3KH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS3KH requirements.
6.How does Aetrix verify that TUAS3KH is sourced from the original manufacturer or authorized distributors?
All TUAS3KH 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 TUAS3KH meets industry standards.
7.What is the process for return or replacement of TUAS3KH?
All TUAS3KH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS3KH, 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 TUAS3KH part is unused and in its original packaging.
Return procedure for TUAS3KH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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