My Inquiry
My Account
Taiwan Semiconductor Corporation TUAS3MH
- Part No.:
- TUAS3MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAS3MH.pdf
- Description:
- 3A, 1000V, STANDARD RECOVERY REC
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TUAS3MH from Taiwan Semiconductor is a 3A, 1000V standard surface-mount rectifier diode in TO-277A (SMPC4.6U) package, featuring AEC-Q101 qualification, glass passivated junction, 100A surge capability, and wettable flanks-designed for automotive DC-DC converters and snubber circuits.
For engineers reviewing the TUAS3MH datasheet, TUAS3MH pinout, TUAS3MH application, or TUAS3MH equivalent, key selection criteria include peak reverse voltage (1000V), forward voltage at 3A/25°C (0.94–1.10V), junction-to-lead thermal resistance (5.4°C/W), AEC-Q101 compliance, and TO-277A mechanical compatibility with automated placement.
Technical Context
The TUAS3MH is a single-die, standard recovery silicon rectifier optimized for high-voltage, medium-current switching applications. It operates across –55°C to +150°C junction temperature range and delivers 100A non-repetitive surge current (8.3ms half-sine) with low reverse leakage (≤5µA at 25°C, ≤11µA at 125°C).
Its TO-277A (SMPC4.6U) package features matte tin-plated leads compliant with J-STD-002, JESD 201 Class 2 whisker resistance, and UL 94V-0 molding compound-enabling robust automotive PCB assembly and reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in high-voltage DC-DC or snubber circuits |
| IF | 3 A - Continuous average forward current; determines steady-state power handling on 16 mm × 16 mm Cu pad |
| IFSM | 100 A - Non-repetitive surge current (8.3 ms); supports transient overload protection without failure |
| VF @ 3A, 25°C | 0.94–1.10 V - Forward voltage drop range; directly impacts conduction loss and thermal design margin |
| RθJL | 5.4 °C/W - Junction-to-lead thermal resistance; enables accurate lead temperature estimation for solder joint reliability |
| IR @ 1000V, 25°C | ≤5 µA - Max reverse leakage; ensures minimal standby power loss in high-impedance bias networks |
| CJ @ 1MHz, 4V | 24 pF - Junction capacitance; influences high-frequency switching behavior and EMI in snubber designs |
Pinout & Package
TO-277A (SMPC4.6U) surface-mount package with cathode indicated by band; 3-terminal configuration (Anode, Cathode, Exposed Cathode Pad). Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to higher-potential node in rectification path; carries full load current during conduction |
| Cathode | Output terminal for forward conduction | Connected to lower-potential node; also serves as primary thermal path via exposed pad |
| Exposed Cathode Pad | Thermal & electrical cathode extension | Provides low-inductance return path and enhances heat dissipation to PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST-enables use in under-hood modules |
| Glass passivated chip junction | Protects die surface from moisture and contamination, improving long-term stability in humid environments |
| Wettable flank geometry | Enables automated optical inspection (AOI) of solder fillets on side terminals-critical for zero-defect automotive manufacturing |
| Moisture sensitivity level 1 | No floor life limitation before reflow; eliminates baking requirement and simplifies SMT line logistics |
| Halogen-free per IEC 61249-2-21 | Meets automotive environmental compliance mandates without compromising flame retardancy (UL 94V-0) |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: High-efficiency 12V-to-48V bidirectional DC-DC conversion in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 3A load and 1000V transients during load dump events. Use Value: 1000V VRRM withstands ISO 7637-2 pulse 5a (110V surge), while 5.4°C/W RθJL maintains <125°C lead temperature under full load. | Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS) with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck topology, clamping inductive kickback during MOSFET turn-off. Use Value: 24pF junction capacitance minimizes switching noise coupling; wettable flanks ensure AOI-verified solder joints for safety-critical lighting. |
| Snubber Networks | On-Board Charger (OBC) Input Rectification |
Use Scenario: RC snubber across IGBTs in EV traction inverters to suppress dv/dt-induced false triggering. IC Role / Device Role / Timing Role: Fast-recovery rectifier absorbing high-energy, short-duration voltage spikes during switching transitions. Use Value: 100A IFSM rating handles 200ns–1µs transients; glass passivation prevents surface leakage degradation under repeated stress. | Use Scenario: AC input bridge rectification stage in 11kW three-phase OBCs with active PFC front-end. IC Role / Device Role / Timing Role: Secondary-side high-voltage rectifier in isolated LLC resonant converter output stage. Use Value: 1000V VRRM accommodates reflected transients from PFC stage; TO-277A package allows dense layout with thermal relief to inner ground plane. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-3EWH10 | Same 3A/1000V rating, TO-277A package, but not AEC-Q101 qualified; VF = 1.15V max @ 3A | Lacks automotive qualification; suitable for industrial power supplies where AEC-Q101 is not mandated | Select when cost sensitivity outweighs automotive qualification and slightly higher VF is acceptable |
| ON Semiconductor MUR3100CT | 3A/1000V dual common-cathode configuration in TO-220AC; faster recovery (trr = 75ns vs. standard ~2µs), but larger footprint and no wettable flanks | Designed for through-hole mounting; requires different PCB layout and lacks AOI support | Choose for legacy through-hole designs needing faster recovery, not for new SMT automotive platforms |
Compared with VS-3EWH10 and MUR3100CT, the TUAS3MH uniquely combines AEC-Q101 qualification, wettable flanks, and TO-277A SMT compatibility-making it the only option meeting full automotive production requirements for space-constrained, AOI-verified rectification.
Availability
TUAS3MH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and snubber networks requiring stable component supply, AEC-Q101 compliance, and high-volume tape-and-reel delivery.
Supply support for TUAS3MH 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 TUAS3MH belongs to TSC's AEC-Q101-qualified surface-mount rectifier product line, engineered specifically for high-reliability automotive power conversion where thermal robustness, process consistency, and automated assembly compatibility are mandatory.
FAQ
What is the maximum junction temperature rating for TUAS3MH?
The TUAS3MH has a maximum junction temperature (TJ) of +150°C, verified per AEC-Q101 stress testing. This rating allows operation in under-hood automotive environments where ambient temperatures exceed 105°C, provided thermal design maintains junction temperature below this limit using the specified RθJL = 5.4°C/W and appropriate PCB copper area.
Is TUAS3MH pin-compatible with other parts in the TUAS3xH series?
Yes, all TUAS3xH variants-including TUAS3DH, TUAS3GH, TUAS3JH, TUAS3KH, and TUAS3MH-share identical TO-277A (SMPC4.6U) package dimensions, pinout, and thermal pad layout. Only the VRRM rating differs (200V to 1000V), enabling direct board-level substitution when voltage requirements change.
Does TUAS3MH require baking before reflow soldering?
No, TUAS3MH has Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and does not require pre-reflow baking. This simplifies SMT line handling and eliminates moisture-related popcorning risk during lead-free reflow profiles.
What is the marking code printed on the TUAS3MH device body?
The TUAS3MH is marked with "AS3M" on its top surface, per the manufacturer's ordering code specification. This 3-character code distinguishes it from other variants (e.g., AS3D for TUAS3DH) and enables traceability and visual identification on assembled PCBs.
How does the wettable flank feature benefit TUAS3MH in automotive manufacturing?
The wettable flank geometry on TUAS3MH enables automated optical inspection (AOI) of solder fillets on the side terminals, ensuring zero-defect solder joint verification required by automotive OEMs. This feature directly supports IATF 16949 process control and reduces field failure risk in safety-critical lighting and power systems.
TUAS3MH 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):
- 1000 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 @ 1000 V
- Capacitance @ Vr, F:
- 24pF @ 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
TUAS3MH FAQ
1.How can I place an order for TUAS3MH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAS3MH 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 TUAS3MH reliable?
The price and inventory of TUAS3MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAS3MH is usually 5 days.
3.What payment methods are accepted for TUAS3MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAS3MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAS3MH?
TUAS3MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAS3MH 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 TUAS3MH?
For technical support, including TUAS3MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAS3MH requirements.
6.How does Aetrix verify that TUAS3MH is sourced from the original manufacturer or authorized distributors?
All TUAS3MH 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 TUAS3MH meets industry standards.
7.What is the process for return or replacement of TUAS3MH?
All TUAS3MH units undergo pre-shipment inspection (PSI). If there is an issue with TUAS3MH, 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 TUAS3MH part is unused and in its original packaging.
Return procedure for TUAS3MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TUAS3MH 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…
