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Taiwan Semiconductor Corporation US1D R3G
- Part No.:
- US1D R3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1D R3G.pdf
- Description:
- DIODE GEN PURP 200V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,943
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Product details
Overview
US1D R3G from Taiwan Semiconductor is a 200 V, 1 A ultrafast surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring 50 ns reverse recovery time, 1.0 V max forward voltage at 1 A, and 5 µA max reverse leakage at 25°C - deployed in DC-DC converter output stages and snubber networks.
For engineers reviewing the US1D R3G datasheet, US1D R3G pinout, US1D R3G application, or US1D R3G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), thermal resistance (RθJL = 27 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
The US1D R3G implements a single-die, glass-passivated PN junction optimized for high-frequency switching operation. Its ultrafast trr ≤ 50 ns and low VF enable reduced switching losses in flyback and forward converters operating up to several hundred kHz.
Thermally, it uses a DO-214AC (SMA) package with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input/output isolation in 12–48 V DC-DC systems with 2× safety margin over nominal bus voltage |
| IF | 1 A continuous - rated for sustained conduction in low-power auxiliary rails and bias supplies |
| trr | ≤ 50 ns - enables efficient operation in >200 kHz switching topologies without excessive turn-off loss |
| VF @ 1 A | ≤ 1.0 V - limits conduction loss to <1 W at full load, reducing thermal stress on PCB copper |
| RθJL | 27 °C/W - allows direct heat transfer to PCB copper pour, supporting ≥0.8 A derated current at 70°C ambient |
| IR @ 25°C | ≤ 5 µA - ensures minimal leakage in high-impedance hold-up or sensing circuits |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration with cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Current entry point under forward bias | Connected to lower-potential node (e.g., switch node or ground return) in freewheeling path |
| Cathode (lead 2) | Current exit point under forward bias; polarity reference | Marked by band; ties to higher-potential rail (e.g., output capacitor positive or VOUT) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in IPC Class 2 environments |
| Ultrafast 50 ns recovery | Reduces reverse recovery charge (Qrr) to <15 nC, minimizing EMI generation in high-dV/dt layouts |
| Moisture sensitivity Level 1 | Enables unlimited floor life before reflow; no baking required prior to assembly |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260°C) |
Applications
| DC-DC Converter Output Rectification | Snubber Network Clamping |
|---|---|
Use Scenario: Used as secondary-side rectifier in isolated 5–24 V, 0.5–1 A flyback converters powering microcontrollers or sensors. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during transformer reset phase. Use Value: Low VF (≤1.0 V) minimizes conduction loss; 50 ns trr prevents shoot-through in synchronous rectifier control windows. | Use Scenario: Placed across MOSFET drain-source in hard-switched PFC or LLC primary side to absorb voltage spikes. IC Role / Device Role / Timing Role: Fast clamping diode that turns on within nanoseconds to limit dV/dt-induced overvoltage during switch turn-off. Use Value: 200 V VRRM provides margin above 170 V peak line; low CJ (15 pF) avoids capacitive loading of gate drive signals. |
| Freewheeling Diode in Buck Regulators | Lighting Driver Flyback Secondary |
Use Scenario: Integrated into 12 V input buck regulators driving LED drivers or motor gate drivers with 1 A load current. IC Role / Device Role / Timing Role: Provides low-impedance return path for inductor current when high-side switch is off; operates in discontinuous conduction mode (DCM). Use Value: RθJL = 27 °C/W enables direct thermal coupling to PCB copper, sustaining 1 A with ≤30°C junction rise at 25°C ambient. | Use Scenario: Rectifies secondary winding output in constant-current LED drivers for commercial downlights (24–48 V, 350 mA–700 mA). IC Role / Device Role / Timing Role: Delivers pulsed DC to smoothing capacitor; blocks reverse current during primary switch conduction. Use Value: 5 µA max IR at 25°C prevents capacitor discharge drift; halogen-free construction meets IEC 62471 photobiological safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02UF (STMicroelectronics) | VRRM = 200 V, trr = 30 ns, VF = 0.95 V @ 1 A, DO-214AC | Lower trr improves efficiency in >500 kHz designs but increases cost and reduces surge rating (IFSM = 20 A vs. 30 A) | Select when minimizing switching loss dominates over surge robustness and BOM cost |
| ES1D (ON Semiconductor) | VRRM = 200 V, trr = 35 ns, VF = 0.92 V @ 1 A, DO-214AC, AEC-Q101 qualified | AEC-Q101 qualification adds automotive qualification overhead; identical thermal specs but tighter VF tolerance | Select for automotive body electronics where qualification traceability is mandatory |
Compared with STTH1R02UF and ES1D, the US1D R3G offers balanced performance with higher surge capability (30 A IFSM) and broader industrial temperature support (–55°C to +150°C), making it optimal for cost-sensitive, non-automotive power supplies requiring proven field reliability.
Availability
US1D R3G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, freewheeling paths, and lighting driver secondary rectification requiring stable component supply and long-term manufacturing continuity.
Supply support for US1D R3G 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, specializing in power rectifiers, TVS diodes, and MOSFETs since 1979.
The US1D R3G belongs to TSC's US1x ultrafast rectifier family, engineered specifically for high-efficiency, high-frequency switching power supplies where low forward drop and fast recovery are critical to system-level thermal and EMI performance.
FAQ
What is the maximum junction temperature rating for US1D R3G?
The US1D R3G has a maximum junction temperature (TJ) of +150°C and a minimum of –55°C. This wide operating range allows deployment in industrial environments with elevated ambient temperatures, such as enclosed power supplies or outdoor lighting fixtures. Derating begins at 25°C ambient per the forward current derating curve, and the device maintains full 1 A rating up to approximately 70°C case temperature when mounted on a standard 1-inch² 2-oz copper pad.
Does US1D R3G support lead-free reflow soldering?
Yes, US1D R3G is RoHS compliant and halogen-free per IEC 61249-2-21, with matte tin-plated leads qualified to J-STD-002 for solderability. It withstands standard lead-free reflow profiles with peak temperatures up to 260°C for 10 seconds, and its DO-214AC (SMA) package is rated for moisture sensitivity Level 1 - eliminating pre-bake requirements before assembly.
What is the reverse recovery time (trr) specification for US1D R3G?
The US1D R3G has a maximum reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast value is confirmed in the official TSC datasheet (Version N2102) and enables efficient operation in switching power supplies operating above 200 kHz, where slower diodes would incur significant turn-off losses and EMI.
Is US1D R3G pin-compatible with other US1x series diodes like US1B or US1G?
Yes, all US1x devices including US1D R3G share identical DO-214AC (SMA) package dimensions, pinout, and mechanical footprint. The only differences are VRRM (200 V for US1D vs. 100 V for US1B or 400 V for US1G) and associated electrical parameters like VF and trr. No PCB layout change is needed when substituting within the US1x family for voltage rating adjustment.
What is the typical junction capacitance (CJ) of US1D R3G and how does it affect circuit behavior?
The US1D R3G exhibits a typical junction capacitance (CJ) of 15 pF at 1 MHz and 4.0 V reverse bias. This low capacitance minimizes displacement current during high-dV/dt transitions, reducing EMI coupling into adjacent traces and gate drive loops - especially critical in snubber and flyback transformer clamp applications where parasitic oscillation must be avoided.
US1D R3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1D R3G FAQ
1.How can I place an order for US1D R3G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1D R3G 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 US1D R3G reliable?
The price and inventory of US1D R3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1D R3G is usually 5 days.
3.What payment methods are accepted for US1D R3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1D R3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1D R3G?
US1D R3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1D R3G 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 US1D R3G?
For technical support, including US1D R3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1D R3G requirements.
6.How does Aetrix verify that US1D R3G is sourced from the original manufacturer or authorized distributors?
All US1D R3G 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 US1D R3G meets industry standards.
7.What is the process for return or replacement of US1D R3G?
All US1D R3G units undergo pre-shipment inspection (PSI). If there is an issue with US1D R3G, 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 US1D R3G part is unused and in its original packaging.
Return procedure for US1D R3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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