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Taiwan Semiconductor Corporation TUAS4DH
- Part No.:
- TUAS4DH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS4DH.pdf
- Description:
- 4A, 200V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAS4DH from Taiwan Semiconductor is a 4A, 200V standard surface-mount rectifier diode in TO-277A (SMPC4.6U) package, featuring AEC-Q101 qualification, glass passivated junction, and 120A surge capability; used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the TUAS4DH datasheet, TUAS4DH pinout, TUAS4DH application, or TUAS4DH equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage at 4A/25°C (0.95 V max), junction-to-lead thermal resistance (5.2 °C/W), and wettable flank packaging for automated optical inspection.
Technical Context
The TUAS4DH is a single-die, standard recovery rectifier optimized for high-reliability automotive power conversion. It operates with a maximum junction temperature of 150°C and supports surge currents up to 120A (8.3ms half-sine), enabling robust transient handling in engine control and lighting modules.
Its TO-277A (SMPC4.6U) package features matte tin-plated leads compliant with J-STD-002, moisture sensitivity level 1 (J-STD-020), and wettable flanks for solder joint inspection-critical for AEC-Q101-compliant automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse voltage; defines safe blocking capability in DC-DC input stages |
| IF | 4 A - Continuous forward current rating; determines steady-state conduction capacity in power rails |
| IFSM | 120 A - Peak non-repetitive surge current (8.3 ms); enables survival during load dump transients |
| VF @ 4A, 25°C | 0.95 V max - Forward voltage drop; directly impacts conduction loss and thermal design in 12V/24V systems |
| RθJL | 5.2 °C/W - Junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper pad |
| IR @ 200V, 25°C | 5 µA max - Reverse leakage current; ensures low standby power in always-on automotive modules |
| CJ @ 1MHz, 4V | 33 pF - Junction capacitance; influences switching noise and EMI in snubber and flyback applications |
Pinout & Package
TO-277A (SMPC4.6U) is a 3-terminal surface-mount package with cathode-indicated band marking (AS4D), matte tin-plated wettable flanks, and UL 94V-0 molding compound. Weight: 0.107 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in rectification topology |
| Cathode | Forward current exit point | Marked by band; connects to positive output rail or snubber node; carries full load current |
| Lead (Case) | Thermal and mechanical interface | Electrically isolated metal tab; serves as primary heat path to PCB copper pad (RθJL = 5.2 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST per JESD47 |
| Glass passivated junction | Enhances humidity resistance and long-term stability in under-hood environments (−40°C to +150°C) |
| Wettable flank terminals | Enables automated AOI of solder fillet integrity on bottom-side SMT joints |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard SMT assembly without dry pack handling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: Step-down conversion from 12V/48V battery to 5V/3.3V logic rails in ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: Low VF (0.95 V max) reduces conduction loss; AEC-Q101 qualification ensures operation across −40°C to +150°C junction range. | Use Scenario: Constant-current regulation and overvoltage protection in adaptive front-lighting systems. IC Role / Device Role / Timing Role: Snubber diode clamping inductive kickback from LED driver MOSFETs. Use Value: 120A IFSM withstands repeated inductive surges; wettable flanks ensure reliable solder joint inspection in safety-critical assemblies. |
| Engine Control Unit Power Supplies | Start-Stop System Rectification |
Use Scenario: Input rectification in auxiliary power modules supplying microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary AC/DC or DC/DC input rectifier handling battery ripple and alternator transients. Use Value: 200V VRRM safely blocks load dump spikes up to 120V; RθJL = 5.2 °C/W enables compact thermal layout on 16 mm × 16 mm Cu pad. | Use Scenario: Bidirectional energy recovery and voltage clamping during frequent engine restart cycles. IC Role / Device Role / Timing Role: Freewheeling and clamp diode in buck-boost converters managing regenerative braking energy. Use Value: Glass passivation prevents degradation under high-humidity under-hood conditions; MSL-1 allows direct placement without preconditioning. |
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-4EWH02-M3/45 | 200V VRRM, 4A IF, TO-277A, but AEC-Q101 not claimed; VF = 1.05 V max @ 4A | Lacks formal automotive qualification; suitable for industrial DC-DC where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive compliance requirements |
| ON Semiconductor MUR420G | 200V VRRM, 4A IF, but TO-220AC package (through-hole); faster recovery (trr = 50 ns vs. standard ~2 µs) | Requires through-hole assembly; higher thermal resistance (RθJA ≈ 50 °C/W) limits power density | Choose only if board-level repairability or legacy footprint compatibility is required |
Compared with VS-4EWH02-M3/45 and MUR420G, the TUAS4DH uniquely combines AEC-Q101 qualification, wettable flanks, and MSL-1 handling in a surface-mount TO-277A package-enabling automotive-grade reliability without assembly process penalties.
Availability
TUAS4DH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and engine control unit power supplies requiring stable component supply across extended temperature and lifecycle demands.
Supply support for TUAS4DH 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 TUAS4DH belongs to TSC's AEC-Q101-qualified standard rectifier family, engineered specifically for high-reliability automotive power conversion where thermal robustness, surge immunity, and automated assembly compatibility are mandatory.
FAQ
What is the maximum junction temperature rating for TUAS4DH?
The TUAS4DH has a maximum junction temperature (TJ MAX) of +150°C, validated per AEC-Q101 stress testing. This rating allows continuous operation in under-hood automotive environments when mounted on a 16 mm × 16 mm PCB copper pad, leveraging its RθJL of 5.2 °C/W for effective thermal dissipation. The TUAS4DH must not exceed this limit under any steady-state or transient condition.
Is TUAS4DH pin-compatible with other variants in the TUAS4xH series?
No-TUAS4DH shares the same TO-277A (SMPC4.6U) package and 3-terminal configuration with TUAS4GH, TUAS4JH, TUAS4KH, and TUAS4MH, but each variant has distinct voltage ratings (200V–1000V) and marking codes (AS4D, AS4G, etc.). While mechanical footprint is identical, electrical substitution requires verification of VRRM, VF, and thermal performance for the target application. TUAS4DH is not a drop-in replacement for higher-voltage variants.
Does TUAS4DH support lead-free reflow soldering?
Yes-TUAS4DH features matte tin-plated leads qualified per J-STD-002 for lead-free soldering, with peak reflow temperatures up to 260°C. Its moisture sensitivity level is rated MSL-1 per J-STD-020, meaning it can be placed directly from dry pack without baking. The TO-277A package also meets JEDEC JESD201 Class 2 whisker resistance requirements.
What is the forward voltage of TUAS4DH at 4A and 125°C?
The TUAS4DH exhibits a typical forward voltage of 0.85 V at 4A and 125°C, with no maximum specified in the datasheet. This reduced VF versus room temperature (0.95 V max at 25°C) reflects positive temperature coefficient behavior common in silicon rectifiers, improving thermal stability in high-temperature automotive applications. The TUAS4DH maintains this performance within its −55°C to +150°C operating range.
How does the wettable flank feature benefit TUAS4DH in automotive manufacturing?
The wettable flank design on TUAS4DH exposes solderable metal along the side walls of its TO-277A leads, enabling automated optical inspection (AOI) of solder fillet formation on bottom-side SMT joints. This supports zero-defect goals in automotive electronics manufacturing, especially for safety-critical modules like ADAS ECUs, where void detection and coplanarity validation are required per IPC-A-610 Class 3 standards. TUAS4DH's wettable flanks are integral to its AEC-Q101 qualification.
TUAS4DH 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):
- 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 @ 200 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
TUAS4DH FAQ
1.How can I place an order for TUAS4DH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS4DH 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 TUAS4DH reliable?
The price and inventory of TUAS4DH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS4DH is usually 5 days.
3.What payment methods are accepted for TUAS4DH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS4DH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS4DH?
TUAS4DH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS4DH 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 TUAS4DH?
For technical support, including TUAS4DH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS4DH requirements.
6.How does Aetrix verify that TUAS4DH is sourced from the original manufacturer or authorized distributors?
All TUAS4DH 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 TUAS4DH meets industry standards.
7.What is the process for return or replacement of TUAS4DH?
All TUAS4DH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS4DH, 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 TUAS4DH part is unused and in its original packaging.
Return procedure for TUAS4DH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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