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Taiwan Semiconductor Corporation TUAS8DH
- Part No.:
- TUAS8DH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS8DH.pdf
- Description:
- 8A, 200V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAS8DH from Taiwan Semiconductor is a 8A, 200V standard surface-mount rectifier diode in TO-277A (SMPC4.6U) package, AEC-Q101 qualified, with VF = 0.96 V at 8A/25°C, IFSM = 230 A (8.3 ms), and RθJL = 4 °C/W - used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the TUAS8DH datasheet, TUAS8DH pinout, TUAS8DH application, or TUAS8DH equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward current rating (8 A), thermal resistance (RθJL = 4 °C/W), AEC-Q101 qualification, and wettable flank package for automated optical inspection.
Technical Context
This single-die standard recovery rectifier operates with a maximum junction temperature of 150°C and supports surge currents up to 230 A (8.3 ms half-sine). Its low forward voltage (0.96 V max at 8A/25°C) and low RθJL (4 °C/W) enable high-efficiency power conversion in space-constrained automotive modules.
The TO-277A (SMPC4.6U) package features matte tin-plated leads compliant with J-STD-002, wettable flanks for solder joint inspection, and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Average Forward Current) | 8 A - continuous DC current handling capability under defined thermal conditions |
| VRRM (Repetitive Peak Reverse Voltage) | 200 V - maximum reverse voltage the device blocks repeatedly without breakdown |
| IFSM (Surge Forward Current, 8.3 ms) | 230 A - short-duration overload capacity critical for input-stage protection |
| VF (Forward Voltage, 8A/25°C) | 0.96 V max - directly determines conduction loss and thermal load in high-current paths |
| RθJL (Junction-to-Lead Thermal Resistance) | 4 °C/W - enables efficient heat transfer to PCB copper pad, supporting compact thermal design |
| IR (Reverse Leakage, 25°C) | 5 µA max - low leakage preserves efficiency in high-impedance bias or sensing nodes |
| CJ (Junction Capacitance, 1 MHz) | 62 pF - impacts switching speed and EMI behavior in snubber and flyback applications |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, single anode-cathode configuration with cathode band polarity marking. Weight: 0.104 g. Molding compound: UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in rectifier configuration |
| Cathode | Current exit terminal during forward conduction | Marked by visible band; connects to higher-potential input (e.g., transformer secondary or switch node) |
| Lead (exposed thermal pad) | Thermal and electrical connection to cathode | Provides primary heat path to PCB; electrically tied to cathode - must be routed accordingly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements |
| Wettable flank structure | Enables automated AOI of solder fillet on side walls - essential for zero-defect automotive manufacturing |
| Low RθJL = 4 °C/W | Reduces junction temperature rise by ~9°C per watt vs. comparable packages, extending lifetime in sealed modules |
| Moisture Sensitivity Level 1 | No bake requirement before reflow - simplifies SMT line integration and reduces process risk |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - required for global automotive OEM supply chains |
Applications
| Automotive DC-DC Converters | LED Headlamp Power Supplies |
|---|---|
Use Scenario: High-reliability 12 V–48 V bidirectional DC-DC conversion in 48 V mild-hybrid systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck-boost topology. Use Value: 200 V VRRM and 230 A IFSM withstand load dump transients; AEC-Q101 ensures operation across -40°C to +150°C ambient. | Use Scenario: Constant-current driver stage powering high-brightness LED arrays in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Freewheeling diode in buck regulator output stage. Use Value: Low VF (0.96 V max) minimizes conduction loss at 5–8 A LED current; wettable flank supports AOI in high-value lighting modules. |
| Snubber Networks | On-Board Charger (OBC) Auxiliary Supplies |
Use Scenario: RC snubber across MOSFETs/IGBTs in traction inverter gate drive or auxiliary power stages. IC Role / Device Role / Timing Role: Fast-recovery clamping diode absorbing turn-off energy. Use Value: 62 pF junction capacitance balances snubbing effectiveness and switching loss; 150°C TJ max allows placement near hot power devices. | Use Scenario: Input rectification for isolated auxiliary supplies powering OBC control logic and gate drivers. IC Role / Device Role / Timing Role: Primary-side bridge rectifier feeding offline flyback or forward converter. Use Value: TO-277A package fits tight board space; RθJL = 4 °C/W maintains thermal margin despite limited heatsinking in sealed enclosures. |
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-8EWH02-M3 | Same 8A/200V rating, TO-277A package, but VF = 0.99 V (max @ 8A), RθJL = 5.5 °C/W | Slightly higher conduction loss and thermal resistance; no AEC-Q101 documentation confirmed | Acceptable where automotive qualification is not mandatory and thermal headroom exceeds 2°C/W |
| ON Semiconductor MUR820G | 8A/200V ultrafast recovery (trr ≈ 50 ns), TO-220AC package, VF = 1.15 V (max @ 8A) | Higher VF increases loss; through-hole mounting requires different layout and rework process | Preferred only if faster recovery is needed to reduce EMI; not drop-in due to package and footprint mismatch |
Compared with VS-8EWH02-M3 and MUR820G, TUAS8DH offers superior thermal performance (RθJL = 4 °C/W), AEC-Q101 validation, and wettable flank compatibility - making it the preferred choice for automotive SMT production where reliability, manufacturability, and thermal density are prioritized.
Availability
TUAS8DH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp power supplies, and snubber networks requiring stable component supply, AEC-Q101 compliance, and surface-mount manufacturability.
Supply support for TUAS8DH 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 TUAS8DH belongs to TSC's AEC-Q101-qualified surface-mount rectifier family designed specifically for high-reliability automotive power conversion - emphasizing thermal robustness, automated assembly compatibility, and transient surge resilience.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for TUAS8DH?
The TUAS8DH has a VRRM rating of 200 V, meaning it reliably blocks up to 200 V of reverse voltage in repetitive operation. This value is fixed for the TUAS8DH variant and differs from higher-voltage members of the same family (e.g., TUAS8MH = 1000 V). The 200 V rating makes TUAS8DH suitable for 12 V and 48 V automotive systems with appropriate derating.
Is TUAS8DH qualified for automotive applications?
Yes, TUAS8DH is explicitly AEC-Q101 qualified, as stated in its official datasheet. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), confirming suitability for under-hood and safety-critical automotive functions such as DC-DC conversion and LED lighting.
What package type does TUAS8DH use, and why is it significant?
TUAS8DH uses the TO-277A (SMPC4.6U) surface-mount package, featuring wettable flanks and a thermally enhanced leadframe. This package enables automated optical inspection of solder joints, supports high-power density layouts, and delivers RθJL = 4 °C/W - significantly better than industry-standard alternatives - which is critical for thermal management in sealed automotive modules.
What is the forward voltage (VF) of TUAS8DH at full rated current?
At IF = 8 A and TJ = 25°C, the TUAS8DH exhibits a maximum forward voltage of 0.96 V, with a typical value of 0.90 V. At elevated junction temperature (125°C), VF drops to 0.87 V (typical), reflecting the negative temperature coefficient of silicon diodes - an important factor when modeling conduction loss across operating temperature ranges.
Does TUAS8DH have a specified junction capacitance, and how does it affect circuit performance?
Yes, TUAS8DH has a typical junction capacitance (CJ) of 62 pF measured at 1 MHz and VR = 4.0 V. This capacitance influences snubber effectiveness, EMI generation, and switching losses in high-frequency topologies. It is higher than the 54 pF seen in TUAS8KH/TUAS8MH variants, reflecting the trade-off between voltage rating and capacitive charge in the die design.
TUAS8DH 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):
- 200 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 @ 200 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
TUAS8DH FAQ
1.How can I place an order for TUAS8DH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS8DH 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 TUAS8DH reliable?
The price and inventory of TUAS8DH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS8DH is usually 5 days.
3.What payment methods are accepted for TUAS8DH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS8DH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS8DH?
TUAS8DH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS8DH 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 TUAS8DH?
For technical support, including TUAS8DH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS8DH requirements.
6.How does Aetrix verify that TUAS8DH is sourced from the original manufacturer or authorized distributors?
All TUAS8DH 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 TUAS8DH meets industry standards.
7.What is the process for return or replacement of TUAS8DH?
All TUAS8DH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS8DH, 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 TUAS8DH part is unused and in its original packaging.
Return procedure for TUAS8DH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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