My Inquiry
My Account
Taiwan Semiconductor Corporation TUAS3GH
- Part No.:
- TUAS3GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS3GH.pdf
- Description:
- 3A, 400V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TUAS3GH from Taiwan Semiconductor is a 3A, 400V AEC-Q101-qualified standard surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring glass passivated junction, 100A surge capability, wettable flanks, and J-STD-020 Level 1 moisture sensitivity-used in automotive DC-DC converters and LED lighting systems.
For engineers reviewing the TUAS3GH datasheet, TUAS3GH pinout, TUAS3GH application, or TUAS3GH equivalent, key selection criteria include repetitive peak reverse voltage (400 V), forward voltage at 3 A (0.94 V typ., 1.10 V max), junction-to-lead thermal resistance (5.4 °C/W), and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This single-die standard recovery rectifier operates with a maximum junction temperature of 150°C and supports continuous forward current up to 3 A at 25°C ambient. Its 400 V VRRM rating and 100 A IFSM (8.3 ms) enable robust snubber and flyback clamp operation in high-reliability automotive power stages.
The TO-277A (SMPC4.6U) package provides wettable flanks for automated optical inspection and meets UL 94V-0 flammability, JESD201 Class 2 whisker resistance, and matte tin-plated leads compliant with J-STD-002 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage for reliable operation in 24–48 V automotive bus-derived DC-DC stages |
| IF | 3 A - Continuous average forward current rating at 25°C ambient on standard PCB pad (16 mm × 16 mm Cu) |
| IFSM | 100 A - Peak non-repetitive surge current (8.3 ms half-sine) enabling transient overload resilience in start-stop systems |
| VF @ 3 A, 25°C | 0.94 V typ., 1.10 V max - Low conduction loss supporting >92% efficiency in low-voltage secondary-side rectification |
| RθJL | 5.4 °C/W - Junction-to-lead thermal resistance enabling direct thermal coupling to PCB copper for passive cooling in space-constrained modules |
| Junction capacitance | 27 pF @ 1 MHz, 4 V - Minimizes switching node ringing in snubber networks and high-frequency flyback auxiliary windings |
Pinout & Package
TO-277A (SMPC4.6U) surface-mount package with cathode-indicating band; 3-terminal configuration (Anode, Cathode, Cathode tab electrically common).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated input or transformer secondary; rated for 3 A continuous and 100 A surge |
| Cathode (tab) | Output current exit point & thermal path | Electrically and thermally tied to exposed metal tab; serves as primary heat dissipation interface to PCB copper |
| Cathode (lead) | Secondary output connection | Provides redundant cathode routing for layout flexibility; same potential as tab, not isolated |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics including engine control units and body electronics requiring zero-failure reliability over 15-year service life |
| Glass passivated junction | Ensures stable reverse leakage (<5 µA at 25°C) and long-term parameter stability under thermal cycling and humidity exposure |
| Wettable flank leads | Enables automated AOI detection of solder joint integrity on bottom-side terminations in double-sided SMT assembly |
| J-STD-020 Level 1 MSL | Allows unlimited floor life before reflow-no baking required-reducing manufacturing overhead in high-volume automotive production |
Applications
| Automotive DC-DC Converter | LED Headlamp Driver |
|---|---|
Use Scenario: Step-down conversion from 48 V battery rail to 12 V for infotainment and ADAS sensors. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in synchronous or quasi-resonant flyback topology. Use Value: 400 V VRRM and 100 A IFSM withstand load dump transients; 0.94 V VF reduces conduction loss by 18% vs. legacy 1.15 V parts. | Use Scenario: Constant-current regulation for high-brightness LED arrays in adaptive front lighting systems. IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to suppress voltage spikes during PWM dimming transitions. Use Value: 27 pF junction capacitance minimizes capacitive coupling noise; wettable flanks ensure solder joint reliability under vibration. |
| Start-Stop System Power Supply | On-Board Charger Auxiliary Rectification |
Use Scenario: Input rectification in buck-boost converter powering microcontrollers during engine cranking (4.5–36 V input range). IC Role / Device Role / Timing Role: Input bridge rectifier feeding wide-input DC-DC controller with hold-up capacitor. Use Value: 150°C TJMAX and -55°C to +150°C operating range support cold-cranking and under-hood thermal extremes. | Use Scenario: Auxiliary 12 V supply generation from OBC's high-voltage DC link for gate drivers and communication ICs. IC Role / Device Role / Timing Role: Isolated auxiliary winding rectifier in dual-output flyback supplying isolated bias rails. Use Value: TO-277A package enables compact layout; RθJL = 5.4 °C/W allows thermal design without heatsink in <5 W auxiliary outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L04S | 400 V VRRM, 3 A IF, but 1.15 V VF max @ 3 A - higher conduction loss; TO-277A package identical | Higher forward drop increases thermal stress in high-duty-cycle automotive converters | Select TUAS3GH when <1.0 V VF and AEC-Q101 compliance are mandatory |
| VS-3EYH04-M3 | 400 V VRRM, 3 A IF, 0.92 V VF typ., but no AEC-Q101 qualification; TO-277A footprint compatible | Lacks automotive qualification - unsuitable for safety-critical or OEM-specified designs | Acceptable for industrial or consumer-grade auxiliary supplies where qualification is not required |
Compared with STTH3L04S and VS-3EYH04-M3, TUAS3GH delivers lower forward voltage, certified AEC-Q101 reliability, and validated thermal performance in automotive environments-making it the preferred choice for OEM-tier power conversion where conduction efficiency and qualification traceability are jointly critical.
Availability
TUAS3GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and start-stop system power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TUAS3GH 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 TUAS3GH belongs to TSC's AEC-Q101-qualified surface-mount rectifier family designed specifically for high-reliability automotive power conversion-emphasizing thermal robustness, surge resilience, and process-controlled parametric consistency.
FAQ
What is the maximum junction temperature rating for TUAS3GH?
The TUAS3GH has a maximum junction temperature (TJMAX) of +150°C, verified per AEC-Q101 stress testing. This rating enables reliable operation in under-hood automotive environments where ambient temperatures exceed 105°C. The device's thermal design-supported by RθJL = 5.4 °C/W-allows sustained 3 A conduction without active cooling when mounted on a 16 mm × 16 mm copper pad. TUAS3GH maintains full parameter integrity within this limit.
Is TUAS3GH pin-compatible with other devices in the TUAS3xH series?
Yes, all TUAS3xH variants-including TUAS3DH, TUAS3GH, TUAS3JH, TUAS3KH, and TUAS3MH-share identical TO-277A (SMPC4.6U) packaging, pinout, and mechanical footprint. The only difference is VRRM: 200 V, 400 V, 600 V, 800 V, and 1000 V respectively. TUAS3GH can be substituted for TUAS3DH in 400 V designs without layout changes, provided forward voltage and thermal requirements remain satisfied.
Does TUAS3GH meet automotive qualification standards?
Yes, TUAS3GH is fully AEC-Q101 qualified, with test reports covering HTOL, TC, UHAST, and bond wire pull tests per Rev D requirements. It also complies with J-STD-020 Level 1 moisture sensitivity, JESD201 Class 2 whisker resistance, and RoHS/halogen-free mandates (IEC 61249-2-21). These qualifications make TUAS3GH suitable for automotive powertrain, chassis, and body electronics applications.
What is the typical forward voltage of TUAS3GH at 3 A and 125°C?
The typical forward voltage of TUAS3GH at 3 A and 125°C is 0.83 V, per the manufacturer's electrical specifications table. This value reflects reduced conduction loss at elevated junction temperatures-a benefit of its glass-passivated silicon die. At the same condition, the maximum specified VF remains unbounded in the datasheet, confirming consistent performance below 0.83 V under normal operation.
How does the wettable flank feature benefit TUAS3GH in production?
The wettable flank design on TUAS3GH's side terminals enables automated optical inspection (AOI) of solder fillet formation on bottom-side terminations-critical for double-sided SMT lines used in automotive module assembly. This feature eliminates manual visual inspection, improves first-pass yield, and supports IPC-A-610 Class 3 acceptance. TUAS3GH's flank geometry is optimized for compatibility with standard reflow profiles and lead-free solder pastes per J-STD-002.
TUAS3GH 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):
- 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 @ 400 V
- Capacitance @ Vr, F:
- 27pF @ 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
TUAS3GH FAQ
1.How can I place an order for TUAS3GH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS3GH 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 TUAS3GH reliable?
The price and inventory of TUAS3GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS3GH is usually 5 days.
3.What payment methods are accepted for TUAS3GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS3GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS3GH?
TUAS3GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS3GH 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 TUAS3GH?
For technical support, including TUAS3GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS3GH requirements.
6.How does Aetrix verify that TUAS3GH is sourced from the original manufacturer or authorized distributors?
All TUAS3GH 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 TUAS3GH meets industry standards.
7.What is the process for return or replacement of TUAS3GH?
All TUAS3GH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS3GH, 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 TUAS3GH part is unused and in its original packaging.
Return procedure for TUAS3GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TUAS3GH Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
