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Taiwan Semiconductor Corporation TUAU4GH
- Part No.:
- TUAU4GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAU4GH.pdf
- Description:
- 50NS, 4A, 400V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAU4GH from Taiwan Semiconductor is a 4A, 400V glass-passivated surface-mount ultrafast rectifier in TO-277A (SMPC4.6U) package, featuring 1.01V max forward voltage at 4A/25°C, 50ns max reverse recovery time, and AEC-Q101 qualification for automotive use in snubber and freewheeling circuits.
For engineers reviewing the TUAU4GH datasheet, TUAU4GH pinout, TUAU4GH application, or TUAU4GH equivalent, key selection criteria include its 400V VRRM, wettable flank terminals, 100A IFSM, -55°C to +150°C operating junction temperature, and compatibility with automated optical inspection (AOI) due to its defined cathode band polarity marking.
Technical Context
The TUAU4GH is a single-die, silicon planar ultrafast recovery rectifier optimized for high-efficiency DC-DC conversion and automotive power management. Its glass-passivated junction ensures stable leakage performance up to 125°C, while the TO-277A package provides low thermal resistance (RθJL = 5.1°C/W) and wettable flanks for solder joint reliability verification.
It operates with a maximum reverse recovery time of 50ns under 0.5A forward / 1.0A reverse switching conditions, enabling high-frequency operation in flyback and boost topologies. The device's 62pF junction capacitance at 4V reverse bias supports predictable EMI behavior in snubber networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 24V–48V automotive bus clamping and DC-DC input stages. |
| IF | 4 A - Continuous average forward current; supports sustained conduction in 50W–100W power supplies without forced cooling. |
| IFSM | 100 A - Non-repetitive surge current (8.3ms); withstands inrush and fault transients in automotive lighting drivers. |
| trr | 50 ns - Max reverse recovery time; enables switching frequencies up to ~500 kHz with minimal switching loss in hard-switched converters. |
| VF | 1.01 V - Max forward voltage at 4A/25°C; directly determines conduction loss (4.04W at full load), critical for thermal design in sealed enclosures. |
| RθJL | 5.1 °C/W - Junction-to-lead thermal resistance; allows direct thermal coupling to PCB copper pour for passive heatsinking in space-constrained modules. |
| Junction temp | -55°C to +150°C - Rated operating range; validated for under-hood automotive environments per AEC-Q101 stress testing. |
Pinout & Package
Package: TO-277A (SMPC4.6U) - Surface-mount, single-anode/single-cathode configuration with wettable flank leads and cathode band polarity indicator. Weight: 0.106g. UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires thermal pad connection for RθJL optimization. |
| Cathode | Forward current exit point | Marked by visible band; ties to higher-potential rail (e.g., output capacitor positive); wettable flank enables AOI solder inspection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47; eliminates requalification for Tier-1 power modules. |
| Glass passivated junction | Stable IR ≤ 5 µA at 400V/25°C and ≤ 7 µA at 125°C; prevents parametric drift in humid under-hood environments. |
| Wettable flank leads | Enables automated optical inspection of solder fillet height and coplanarity; reduces field failure risk in high-volume SMT lines. |
| Ultrafast recovery (trr ≤ 50 ns) | Minimizes reverse recovery charge (Qrr) in hard-switched topologies; lowers EMI generation and diode-induced voltage spikes. |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; simplifies manufacturing flow and avoids moisture-related popcorning during assembly. |
Applications
| Automotive LED Headlamp Driver | 48V DC-DC Buck Converter |
|---|---|
Use Scenario: High-brightness LED array powered from vehicle battery with PWM dimming and overvoltage protection. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck controller stage, conducting during low-side switch off-time. Use Value: 50ns trr limits voltage overshoot across MOSFET during turn-on, preserving 60V FET VDS margin; AEC-Q101 rating ensures 15-year under-hood life. | Use Scenario: Step-down conversion from 48V mild-hybrid bus to 12V auxiliary systems in electric vehicles. IC Role / Device Role / Timing Role: Output rectifier in non-synchronous buck topology, handling continuous 4A load current. Use Value: 1.01V VF at 4A yields only 4.04W conduction loss, enabling natural convection cooling on 16mm × 16mm Cu pad per thermal test board. |
| Snubber Network in On-Board Charger | Industrial AC-DC Front-End |
Use Scenario: RC snubber across IGBT in 6.6kW OBC PFC stage to suppress dv/dt-induced false triggering. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing turn-off energy from transformer leakage inductance. Use Value: 100A IFSM withstands repeated 50ns transient surges; 62pF CJ stabilizes snubber resonance frequency below 10MHz for EMC compliance. | Use Scenario: Input bridge rectification in industrial 24V/5A DIN-rail power supply with wide ambient temperature range. IC Role / Device Role / Timing Role: Single-phase rectifier replacing discrete diode pairs, reducing component count and footprint. Use Value: TO-277A package fits standard 4.6mm pitch layouts; -55°C to +150°C TJ rating supports operation in uncooled control cabinets at 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L04S | 4A/400V, 50ns trr, but TO-277 package lacks wettable flanks and AEC-Q101 qualification. | Suitable for industrial, non-automotive designs where AOI and automotive qualification are not required. | Select when cost sensitivity outweighs AOI capability and automotive compliance needs. |
| ON Semi MUR440 | 4A/400V, 60ns trr, TO-220AC package - larger footprint, no wettable flanks, no AEC-Q101. | Better suited for through-hole prototyping or legacy board upgrades where surface-mount constraints are relaxed. | Choose for manual assembly or thermal testing with heatsink mounting; avoid for high-volume automotive SMT. |
Compared with STTH4L04S and MUR440, the TUAU4GH uniquely combines AEC-Q101 qualification, wettable flank leads for AOI, and 50ns recovery in a compact TO-277A package - making it the only option meeting OEM automotive production requirements for automated, high-reliability SMT assembly.
Availability
TUAU4GH is available at Aetrix Electronics and suitable for automotive LED lighting, 48V DC-DC conversion, and industrial snubber applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TUAU4GH 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 semiconductor manufacturer specializing in power discrete devices, with global distribution and ISO/TS 16949-certified automotive production lines.
The TUAU4GH belongs to TSC's AEC-Q101-qualified ultrafast rectifier product line, engineered specifically for high-reliability automotive power conversion where thermal robustness, fast switching, and process consistency are mandatory.
FAQ
What is the maximum junction temperature rating for the TUAU4GH?
The TUAU4GH has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This rating applies across its full VRRM range and supports operation in under-hood automotive environments. Derating curves in the datasheet show usable current drops linearly above 100°C ambient, with 4A maintained up to 125°C case temperature when mounted on a 16mm × 16mm Cu pad.
Does the TUAU4GH support automated optical inspection (AOI)?
Yes, the TUAU4GH supports AOI via its wettable flank leads - a feature explicitly called out in the mechanical data section. The side-wettable terminations allow machine vision systems to verify solder fillet formation and coplanarity post-reflow, improving first-pass yield in high-volume automotive SMT lines. This capability is confirmed in the "MECHANICAL DATA" and "ORDERING INFORMATION" sections of the official TSC datasheet Version A2111.
What is the reverse recovery time (trr) specification for the TUAU4GH?
The TUAU4GH has a maximum reverse recovery time (trr) of 50 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A conditions. This value is specified in the "ELECTRICAL SPECIFICATIONS" table on page 2 of the TSC datasheet (Version A2111). It reflects the device's ultrafast switching capability, critical for minimizing switching losses in high-frequency DC-DC converters.
Is the TUAU4GH RoHS and halogen-free compliant?
Yes, the TUAU4GH is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the "FEATURES" section of the TSC datasheet. These compliance statements are verified through material declarations and third-party testing. The device carries no exemptions and meets all substance restrictions for EU WEEE and China RoHS directives applicable to automotive electronics.
What does the marking code 'AU4G' indicate on the TUAU4GH device body?
The marking code 'AU4G' on the TUAU4GH identifies it as the 400V variant within the TUAU4xH family, per the "ABSOLUTE MAXIMUM RATINGS" table on page 1 of the TSC datasheet. 'AU4' denotes the series, and 'G' corresponds to VRRM = 400V. This marking is laser-etched on the cathode-side surface and aligns with the polarity band for unambiguous orientation during placement.
TUAU4GH 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:
- 1.3 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 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 ~ 175°C
TUAU4GH FAQ
1.How can I place an order for TUAU4GH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAU4GH 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 TUAU4GH reliable?
The price and inventory of TUAU4GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAU4GH is usually 5 days.
3.What payment methods are accepted for TUAU4GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAU4GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAU4GH?
TUAU4GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAU4GH 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 TUAU4GH?
For technical support, including TUAU4GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAU4GH requirements.
6.How does Aetrix verify that TUAU4GH is sourced from the original manufacturer or authorized distributors?
All TUAU4GH 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 TUAU4GH meets industry standards.
7.What is the process for return or replacement of TUAU4GH?
All TUAU4GH units undergo pre-shipment inspection (PSI). If there is an issue with TUAU4GH, 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 TUAU4GH part is unused and in its original packaging.
Return procedure for TUAU4GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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