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Taiwan Semiconductor Corporation US1DH
- Part No.:
- US1DH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1DH.pdf
- Description:
- DIODE GEN PURP 200V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:14,976
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Product details
Overview
US1DH from Taiwan Semiconductor is a 1A, 200V ultrafast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 50 ns reverse recovery time, 1.0 V forward voltage at 1 A, and AEC-Q101 qualification for automotive use in DC-DC converters and freewheeling circuits.
For engineers reviewing the US1DH datasheet, US1DH pinout, US1DH application, or US1DH equivalent, key selection criteria include repetitive peak reverse voltage (200 V), junction-to-lead thermal resistance (27 °C/W), moisture sensitivity level (J-STD-020 Level 1), and glass-passivated junction construction for reliability in high-efficiency power conversion.
Technical Context
The US1DH operates as a single-die, unidirectional silicon rectifier with ultrafast recovery optimized for switching-mode power supplies. Its 50 ns trr and low VF enable reduced switching losses in high-frequency DC-DC topologies.
Thermally, it supports continuous operation up to 150 °C junction temperature, with RθJL = 27 °C/W enabling effective heat transfer to PCB copper in compact layouts. The DO-214AC package provides JESD201 Class 2 whisker resistance and matte tin-plated leads compliant with J-STD-002 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage before breakdown; defines safe operating range in snubber and freewheeling applications. |
| IF | 1 A - Continuous average forward current rating; determines steady-state power handling in DC-DC output stages. |
| trr | 50 ns - Reverse recovery time at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation above 100 kHz switching frequencies. |
| VF | 1.0 V @ 1 A, 25°C - Forward voltage drop; directly impacts conduction loss and thermal rise in high-duty-cycle rectification. |
| RθJL | 27 °C/W - Junction-to-lead thermal resistance; allows accurate thermal modeling when mounted on standard FR-4 with 100 mm² copper pad. |
| IR | 5 µA @ 200 V, 25°C - Max reverse leakage; ensures minimal standby power loss in automotive lighting and control modules. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band. Matte tin-plated leads, J-STD-002 solderable, JESD201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit (e.g., switch node in buck freewheel path); must withstand IFSM = 30 A surge. |
| Cathode | Forward current exit point / reverse blocking terminal | Marked with band; connected to higher-potential rail (e.g., output capacitor positive); blocks 200 V continuously. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47; suitable for under-hood and lighting modules. |
| Glass passivated junction | Hermetically sealed die surface prevents moisture ingress and contamination, improving long-term stability in humid environments. |
| Ultrafast 50 ns recovery | Minimizes reverse recovery charge (Qrr), reducing switching losses and EMI in 200–500 kHz DC-DC converters. |
| J-STD-020 Level 1 MSL | Zero floor life limitation; no bake requirement prior to reflow, enabling direct placement in automated SMT lines without dry pack handling. |
Applications
| Automotive LED Lighting | DC-DC Converter Output Rectification |
|---|---|
Use Scenario: High-brightness LED headlamp driver with 200 kHz synchronous buck topology requiring low-loss, reliable freewheeling path. IC Role / Device Role / Timing Role: Freewheeling diode providing current continuity during high-side switch off-time; handles 1 A average current with <50 ns turn-off. Use Value: 1.0 V VF minimizes conduction loss and thermal stress; AEC-Q101 qualification ensures lifetime compliance in 125°C ambient under-hood conditions. | Use Scenario: 12 V input to 3.3 V/1 A isolated flyback converter in infotainment power supply. IC Role / Device Role / Timing Role: Secondary-side rectifier converting transformer AC output to regulated DC; operates at full switching frequency with minimal reverse recovery tail. Use Value: 50 ns trr reduces switching node ringing and EMI filter burden; DO-214AC footprint enables dense layout with 27 °C/W thermal path to PCB. |
| Snubber Network Protection | Automotive Body Control Module (BCM) |
Use Scenario: RCD snubber across MOSFET drain-source in 48 V BLDC motor gate driver to suppress voltage spikes. IC Role / Device Role / Timing Role: Fast-recovery clamp diode conducting transient energy into snubber capacitor during MOSFET turn-off. Use Value: 200 V VRRM safely clamps transients up to 180 V; 30 A IFSM withstands repeated surge events without degradation. | Use Scenario: Power rail protection and reverse polarity safeguard in 5 V/1 A microcontroller supply within door module. IC Role / Device Role / Timing Role: Input protection rectifier preventing damage from battery reversal or jump-start transients. Use Value: Glass passivation ensures stable IR < 5 µA over 15-year vehicle life; RoHS/halogen-free compliance meets automotive material restrictions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02U (STMicroelectronics) | Same 1 A / 200 V rating, but trr = 35 ns (faster), VF = 1.15 V (higher), DO-214AC package. | Better suited for >300 kHz designs where recovery speed dominates conduction loss trade-off. | Select when minimizing Qrr and EMI is critical; verify layout thermal margin due to higher VF. |
| ES1D (ON Semiconductor) | Identical 1 A / 200 V / 50 ns spec, AEC-Q101 qualified, same DO-214AC package and marking convention. | Drop-in compatible in automotive designs requiring second-source assurance without layout or thermal redesign. | Preferred for dual-sourcing programs where pinout, thermal behavior, and qualification alignment are mandatory. |
Compared with STTH1R02U and ES1D, the US1DH offers optimal balance of low VF (1.0 V) and proven AEC-Q101 robustness in cost-sensitive automotive power stages, while ES1D provides true second-source equivalence with identical parametric and qualification alignment.
Availability
US1DH is available at Aetrix Electronics and suitable for automotive LED lighting, DC-DC converter output rectification, and snubber network protection requiring stable component supply across production lifecycles.
Supply support for US1DH 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 US1DH belongs to TSC's US1xH ultrafast rectifier family, engineered specifically for high-efficiency, AEC-Q101-compliant power conversion in automotive subsystems where reliability, thermal performance, and manufacturability are critical.
FAQ
What is the maximum junction temperature rating for US1DH?
The US1DH has a maximum junction temperature (TJ MAX) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating enables operation in under-hood automotive environments when properly heatsinked via PCB copper. Derating curves confirm 1 A continuous current is sustainable up to 125°C ambient with adequate thermal design. The US1DH must not exceed this limit to maintain AEC-Q101 reliability performance.
Is US1DH suitable for automotive applications requiring AEC-Q101 qualification?
Yes, US1DH is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including HTGB, HTRB, temperature cycling, and ESD. It is approved for use in automotive LED lighting, body control modules, and DC-DC converters where qualification evidence is mandatory. The US1DH's glass-passivated junction and JESD201 Class 2 whisker resistance further reinforce its suitability for automotive deployment.
What is the reverse recovery time (trr) of US1DH and under what test conditions is it specified?
The US1DH reverse recovery time is 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the electrical specifications table. This value applies at TA = 25°C and confirms ultrafast behavior suitable for switching frequencies up to 500 kHz. The US1DH maintains consistent trr performance across its rated temperature range, supporting stable efficiency in thermally varying automotive power systems.
Does US1DH have moisture sensitivity level (MSL) rating, and what does it mean for assembly?
Yes, US1DH carries J-STD-020 Moisture Sensitivity Level 1, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This eliminates dry-pack handling and moisture-related popcorning risk during SMT assembly. The US1DH can be placed directly from tape-and-reel into standard lead-free reflow profiles, streamlining high-volume automotive manufacturing and reducing process overhead.
What packaging and reel quantity is offered for US1DH?
US1DH is supplied in DO-214AC (SMA) package on 7,500-unit tape-and-reel format, compatible with standard pick-and-place equipment. The reel complies with EIA-481 standards, and the device marking "US1D" is laser-etched on the cathode end. This packaging supports automated placement in automotive electronics production lines and ensures traceability through date code (YW) and factory code (F) markings per the official package outline diagram.
US1DH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1DH FAQ
1.How can I place an order for US1DH through Aetrix?
Please submit a Request for Quotation (RFQ) for US1DH 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 US1DH reliable?
The price and inventory of US1DH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1DH is usually 5 days.
3.What payment methods are accepted for US1DH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1DH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1DH?
US1DH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1DH 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 US1DH?
For technical support, including US1DH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1DH requirements.
6.How does Aetrix verify that US1DH is sourced from the original manufacturer or authorized distributors?
All US1DH 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 US1DH meets industry standards.
7.What is the process for return or replacement of US1DH?
All US1DH units undergo pre-shipment inspection (PSI). If there is an issue with US1DH, 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 US1DH part is unused and in its original packaging.
Return procedure for US1DH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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