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Taiwan Semiconductor Corporation TUAR4GH
- Part No.:
- TUAR4GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAR4GH.pdf
- Description:
- 150NS, 4A, 400V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAR4GH from Taiwan Semiconductor is a 4A, 400V fast recovery surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring AEC-Q101 qualification, glass passivated junction, wettable flanks, and 150°C max junction temperature-used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the TUAR4GH datasheet, TUAR4GH pinout, TUAR4GH application, or TUAR4GH equivalent, key selection criteria include its 400V VRRM, 90A IFSM, 1.13V forward voltage at 4A/25°C, 150ns reverse recovery time, and AEC-Q101 compliance for automotive-grade reliability.
Technical Context
The TUAR4GH operates as a single-die, unidirectional fast recovery rectifier optimized for high-efficiency switching power supplies. Its 150ns trr and low 1.13V VF at rated current support reduced switching losses in high-frequency DC-DC topologies.
Thermally, it delivers RθJL = 5.1°C/W and RθJA = 47°C/W on a 16mm × 16mm Cu pad, enabling stable 4A continuous operation up to 150°C junction temperature with appropriate PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 400V-rated DC bus or snubber applications. |
| IF | 4 A - Continuous average forward current; supports sustained conduction in automotive lighting and converter output stages. |
| IFSM | 90 A - Non-repetitive surge current (8.3ms); withstands inrush and transient overloads in engine control modules. |
| trr | 150 ns - Reverse recovery time; enables efficient operation up to ~500 kHz switching frequencies with minimal commutation loss. |
| VF @ 4A, 25°C | 1.13 V - Forward voltage drop; determines conduction loss of 4.52 W at full load, critical for thermal design in confined spaces. |
| RθJL | 5.1 °C/W - Junction-to-lead thermal resistance; allows direct thermal coupling to PCB copper for passive cooling without heatsink. |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, single-anode/single-cathode configuration with cathode band polarity marking and wettable flank leads for automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling or snubber paths. |
| Cathode | Forward current output / reverse blocking terminal | Connected to higher-potential rail; cathode band identifies polarity for correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| Glass passivated junction | Provides robust die surface protection against moisture ingress and contamination, extending lifetime in humid automotive cabins. |
| Wettable flank leads | Enables reliable solder joint inspection via AOI by exposing vertical lead surfaces fully wetted during reflow. |
| Junction capacitance (31 pF) | Minimizes capacitive coupling in high-dv/dt snubber networks, reducing EMI generation in 12V/48V vehicle systems. |
Applications
| Automotive DC-DC Converter | LED Headlamp Driver |
|---|---|
Use Scenario: Step-down conversion from 48V battery to 12V auxiliary rail in modern vehicle architectures. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter, handling continuous 4A load with fast recovery. Use Value: 150ns trr and 1.13V VF minimize conduction and switching losses, improving efficiency above 92% at full load. | Use Scenario: Constant-current regulation for high-brightness LED arrays in adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: Freewheeling diode across inductive driver stage, clamping flyback energy during PWM dimming cycles. Use Value: 90A IFSM safely absorbs peak inductive kickback; AEC-Q101 rating ensures reliability over 15-year vehicle lifespan. |
| Snubber Network | On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: RC snubber across IGBT or MOSFET switches in traction inverter gate drive or OBC PFC stages. IC Role / Device Role / Timing Role: Fast-recovery clamp diode that resets snubber capacitor with minimal stored charge and reverse recovery tail. Use Value: Low Qrr (derived from 150ns trr and 31pF CJ) reduces snubber dissipation and improves switching waveform fidelity. | Use Scenario: Auxiliary 12V supply derived from main HV DC link for OBC control logic and isolation bias rails. IC Role / Device Role / Timing Role: Primary rectifier in flyback or forward converter feeding offline SMPS controller ICs. Use Value: TO-277A package with wettable flanks ensures manufacturability and long-term solder joint integrity in thermally cycled EV charging environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04DJF | 4A, 400V, TO-277A, trr = 130ns, VF = 1.15V @ 4A, non-AEC-Q101 | Lacks AEC-Q101 qualification; suitable for industrial but not automotive safety-critical use. | Select when AEC-Q101 is not required and slightly faster recovery is prioritized. |
| VS-4EYH04-M3 | 4A, 400V, TO-277A, trr = 160ns, VF = 1.10V @ 4A, AEC-Q101 qualified | Lower forward voltage but marginally slower recovery; identical wettable flank and MSL-1 rating. | Prefer for lower conduction loss where 10ns trr penalty is acceptable in cost-sensitive automotive modules. |
Compared with STTH4R04DJF and VS-4EYH04-M3, the TUAR4GH balances AEC-Q101 compliance, 150ns recovery, and 1.13V forward drop-making it optimal for automotive DC-DC and LED drivers where qualification, thermal robustness, and manufacturability are jointly critical.
Availability
TUAR4GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and snubber networks requiring stable component supply with AEC-Q101 assurance and TO-277A surface-mount compatibility.
Supply support for TUAR4GH 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, rectifiers, and protection components.
The TUAR4GH belongs to TSC's AEC-Q101-qualified fast recovery rectifier family, engineered specifically for automotive power conversion, lighting, and snubbing applications demanding high surge capability and thermal resilience.
FAQ
What is the maximum junction temperature rating for TUAR4GH?
The TUAR4GH has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating enables reliable operation in under-hood automotive environments when mounted on a 16mm × 16mm copper pad. Thermal derating must be applied above 100°C ambient to maintain safe junction temperatures within this limit for the TUAR4GH.
Is TUAR4GH pin-compatible with TUAR4DH or TUAR4JH?
No, TUAR4GH is not pin-compatible with TUAR4DH or TUAR4JH in the functional sense-though all share the same TO-277A (SMPC4.6U) package and pinout, their VRRM ratings differ (200V, 400V, 600V respectively). Circuit redesign is required when substituting due to differing reverse voltage margins; the TUAR4GH must only replace other 400V-rated variants unless system-level voltage stress analysis confirms safety.
Does TUAR4GH support automated optical inspection (AOI)?
Yes, the TUAR4GH features wettable flank leads per its mechanical specification, enabling full-side solder joint inspection using standard AOI systems. This design meets IPC-A-610 Class 3 requirements for automotive electronics assembly and is validated in TSC's A2111 revision documentation for the TUAR4GH device.
What is the reverse leakage current of TUAR4GH at 125°C?
At 125°C junction temperature and rated reverse voltage (400V), the TUAR4GH exhibits a maximum reverse leakage current (IR) of 12 µA, as specified in the Electrical Specifications table. This low leakage supports stable performance in high-temperature automotive applications such as engine control units where thermal management is constrained.
How does the glass passivation of TUAR4GH improve reliability?
The glass passivated chip junction in TUAR4GH provides hermetic protection against moisture, ionic contaminants, and mechanical stress-critical for long-term reliability in automotive environments subject to thermal cycling and condensation. This passivation layer directly contributes to the device's AEC-Q101 qualification and MSL-1 moisture sensitivity rating, ensuring no popcorn effect during reflow for the TUAR4GH.
TUAR4GH 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:
- 1.4 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 31pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMPC4.6U
- Operating Temperature - Junction:
- -55°C ~ 150°C
TUAR4GH FAQ
1.How can I place an order for TUAR4GH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAR4GH 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 TUAR4GH reliable?
The price and inventory of TUAR4GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAR4GH is usually 5 days.
3.What payment methods are accepted for TUAR4GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAR4GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAR4GH?
TUAR4GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAR4GH 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 TUAR4GH?
For technical support, including TUAR4GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAR4GH requirements.
6.How does Aetrix verify that TUAR4GH is sourced from the original manufacturer or authorized distributors?
All TUAR4GH 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 TUAR4GH meets industry standards.
7.What is the process for return or replacement of TUAR4GH?
All TUAR4GH units undergo pre-shipment inspection (PSI). If there is an issue with TUAR4GH, 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 TUAR4GH part is unused and in its original packaging.
Return procedure for TUAR4GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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