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Taiwan Semiconductor Corporation TUAR4MH
- Part No.:
- TUAR4MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TUAR4MH.pdf
- Description:
- 500NS, 4A, 1000V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TUAR4MH from Taiwan Semiconductor is a 4A, 1000V fast recovery surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring 500 ns reverse recovery time, 1.13 V forward voltage at 4A/25°C, and AEC-Q101 qualification for automotive power conversion.
For engineers reviewing the TUAR4MH datasheet, TUAR4MH pinout, TUAR4MH application, or TUAR4MH equivalent, key selection criteria include peak reverse voltage rating, surge current capability (90 A), thermal resistance (RθJL = 5.1 °C/W), wettable flank terminals, and JESD201 Class 2 whisker compliance.
Technical Context
The TUAR4MH implements a single-die fast recovery rectifier structure with glass-passivated junction and optimized carrier lifetime control to achieve 500 ns trr at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A. Its 1000 V VRRM and 90 A IFSM support high-voltage snubber and DC-DC flyback applications under transient stress.
Thermal design relies on low RθJL (5.1 °C/W) and RθJC (8.5 °C/W), validated on 16 mm × 16 mm Cu pad PCBs. The TO-277A package includes wettable flanks and matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - maximum repetitive reverse blocking voltage without breakdown |
| IF | 4 A - continuous average forward current at TL = 115°C |
| IFSM | 90 A - non-repetitive surge current (8.3 ms half-sine) |
| trr | 500 ns - reverse recovery time under specified test conditions |
| VF | 1.13 V max @ 4 A, 25°C - forward conduction loss impact on efficiency |
| RθJL | 5.1 °C/W - junction-to-lead thermal resistance for PCB-level thermal management |
| CJ | 24 pF @ 1 MHz, 4 V - junction capacitance affecting high-frequency switching noise |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, single-anode/single-cathode configuration with cathode band polarity marking and wettable flank terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/high-side node in rectification path; rated for 4 A continuous |
| Cathode | Forward current exit point | Connected to output/low-side node; marked by visible cathode band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power modules and lighting systems per stress test requirements |
| Glass passivated junction | Enhanced moisture and contamination resistance for long-term operation in harsh environments |
| Wettable flank terminals | Enables automated optical inspection (AOI) of solder joints on bottom-side terminations |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for automotive ECU longevity |
| Moisture sensitivity level 1 | No floor life limitation or baking requirement prior to reflow assembly |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: High-efficiency isolated buck-boost converters supplying 12 V/24 V rails in ADAS ECUs. IC Role / Device Role / Timing Role: Primary output rectifier in secondary-side synchronous or diode-based topology. Use Value: 1000 V VRRM withstands reflected voltage spikes during MOSFET turn-off; 500 ns trr minimizes switching losses. | Use Scenario: Constant-current LED drivers powering high-brightness headlamps in modern vehicles. IC Role / Device Role / Timing Role: Output rectifier in flyback or SEPIC-derived driver stages. Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient; wettable flanks support AOI for safety-critical assembly. |
| Snubber Networks | Industrial Power Supplies |
Use Scenario: RC/RCD snubbers across MOSFETs or IGBTs in motor drives and inverters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing turn-off energy. Use Value: 90 A IFSM handles high-energy transients; 500 ns trr prevents reverse conduction during rapid voltage reversal. | Use Scenario: Auxiliary power supplies in PLCs and industrial HMIs requiring stable 5 V/3.3 V rails. IC Role / Device Role / Timing Role: Input bridge or output rectifier in offline SMPS designs. Use Value: TO-277A package enables compact layout with RθJL = 5.1 °C/W for passive thermal management on standard FR4 PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06S | 600 V VRRM, 120 ns trr, TO-277A package, no AEC-Q101 | Lower voltage rating limits use in >600 V circuits; faster recovery suits higher-frequency SMPS | Select when lower trr and cost priority outweigh automotive qualification needs |
| VS-4EYH06-M3 | 600 V VRRM, 150 ns trr, TO-277A, AEC-Q101 qualified | Insufficient VRRM margin for 1000 V bus designs; identical qualification for automotive use | Choose only if system VR ≤ 600 V and AEC-Q101 is mandatory |
Compared with STTH4L06S and VS-4EYH06-M3, the TUAR4MH uniquely delivers 1000 V blocking with AEC-Q101 qualification and 500 ns recovery-enabling robust snubber and high-voltage automotive converter designs where both voltage margin and automotive reliability are non-negotiable.
Availability
TUAR4MH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and industrial snubber networks requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for TUAR4MH 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 TUAR4xH series belongs to TSC's AEC-Q101-qualified fast recovery rectifier product line, engineered specifically for high-reliability automotive power conversion and industrial snubbing where voltage margin, surge robustness, and thermal performance are critical.
FAQ
What is the peak repetitive reverse voltage rating of the TUAR4MH?
The TUAR4MH has a peak repetitive reverse voltage (VRRM) rating of 1000 V, verified per absolute maximum ratings table in the official TSC datasheet Version A2111. This defines the maximum reverse-biased voltage the device can block continuously without avalanche breakdown. It is the highest VRRM in the TUAR4xH family and distinguishes TUAR4MH from lower-voltage variants like TUAR4DH (200 V) or TUAR4KH (800 V).
Is the TUAR4MH qualified for automotive applications?
Yes, the TUAR4MH is AEC-Q101 qualified, as explicitly stated in the features section of the TSC datasheet. This qualification covers stress tests including HTGB, HTRB, temperature cycling, and mechanical shock, confirming suitability for automotive power electronics such as engine control units, lighting modules, and ADAS subsystems. The TUAR4MH shares this qualification across the entire TUAR4xH series.
What is the reverse recovery time (trr) of the TUAR4MH and under what conditions is it measured?
The TUAR4MH has a maximum reverse recovery time (trr) of 500 ns, measured under the conditions: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, per the electrical specifications table in the TSC datasheet. This value applies specifically to TUAR4KH and TUAR4MH variants; lower-voltage versions (e.g., TUAR4DH) specify shorter trr values. The measurement uses a half-sine waveform with defined di/dt and voltage slew rate.
Does the TUAR4MH have wettable flank terminals, and why does that matter?
Yes, the TUAR4MH features wettable flank terminals as confirmed in the mechanical data section of the TSC datasheet. This design allows solder to wick up the vertical sidewall of the lead during reflow, enabling automated optical inspection (AOI) of solder joint quality on bottom-side terminations-critical for zero-defect manufacturing in automotive electronics where field failure is unacceptable.
What is the forward voltage drop of the TUAR4MH at rated current and room temperature?
The TUAR4MH exhibits a typical forward voltage (VF) of 1.13 V at 4 A and 25°C, with a maximum of 1.4 V under the same conditions, per the electrical specifications table. This VF directly impacts conduction losses in power conversion stages. At elevated junction temperature (125°C), VF drops to 0.96 V typical, reflecting the negative temperature coefficient of silicon PN junctions.
TUAR4MH 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):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- 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:
- SMPC4.6U
- Operating Temperature - Junction:
- -55°C ~ 150°C
TUAR4MH FAQ
1.How can I place an order for TUAR4MH through Aetrix?
Please submit a Request for Quotation (RFQ) for TUAR4MH 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 TUAR4MH reliable?
The price and inventory of TUAR4MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUAR4MH is usually 5 days.
3.What payment methods are accepted for TUAR4MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUAR4MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUAR4MH?
TUAR4MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUAR4MH 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 TUAR4MH?
For technical support, including TUAR4MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUAR4MH requirements.
6.How does Aetrix verify that TUAR4MH is sourced from the original manufacturer or authorized distributors?
All TUAR4MH 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 TUAR4MH meets industry standards.
7.What is the process for return or replacement of TUAR4MH?
All TUAR4MH units undergo pre-shipment inspection (PSI). If there is an issue with TUAR4MH, 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 TUAR4MH part is unused and in its original packaging.
Return procedure for TUAR4MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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