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Taiwan Semiconductor Corporation US1M R3G
- Part No.:
- US1M R3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1M R3G.pdf
- Description:
- DIODE GEN PURP 1KV 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:13,857
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Product details
Overview
US1M R3G from Taiwan Semiconductor is a 1 A, 1000 V ultrafast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 1.7 V max forward voltage at 1 A and 75 ns reverse recovery time, used for freewheeling and snubber circuits in high-frequency switching power supplies.
For engineers reviewing the US1M R3G datasheet, US1M R3G pinout, US1M R3G application, or US1M R3G equivalent, key selection criteria include peak repetitive reverse voltage (1000 V), surge current rating (30 A), thermal resistance (27 °C/W junction-to-lead), and RoHS/halogen-free compliance for industrial DC-DC and lighting inverters.
Technical Context
This single-die silicon rectifier uses glass-passivated junction technology to achieve stable ultrafast recovery (75 ns) and low leakage (≤5 µA at 25°C, ≤150 µA at 125°C) under rated reverse voltage. Its DO-214AC (SMA) package supports automated placement and meets J-STD-020 moisture sensitivity level 1.
The device operates across -55°C to +150°C junction temperature range with 27 °C/W junction-to-lead and 75 °C/W junction-to-ambient thermal resistance, enabling reliable performance in compact, thermally constrained switch-mode power topologies without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands up to 1000 V repetitive reverse voltage without breakdown, suitable for high-voltage flyback and PFC stages |
| IF | 1 A continuous - Rated average forward current defines steady-state conduction capability in DC-DC output rectification |
| IFSM | 30 A - Peak non-repetitive surge current rating enables robustness against inrush and transient overloads |
| VF (max) | 1.7 V @ 1 A, 25°C - Low forward drop minimizes conduction loss and improves system efficiency in high-frequency converters |
| trr | 75 ns - Ultrafast recovery reduces switching losses and EMI generation during turn-off in SMPS operation |
| IR (max) | 5 µA @ 25°C - Low reverse leakage preserves voltage hold-up and reduces standby power in high-impedance bias networks |
| RθJL | 27 °C/W - Enables direct thermal path to PCB copper, supporting >0.8 W dissipation with minimal lead temperature rise |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of load or switch node; must handle full 1 A DC and 30 A surge |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail; sustains 1000 V reverse bias with ≤5 µA leakage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable electrical parameters under humidity and thermal cycling stress |
| Ultrafast 75 ns recovery | Reduces reverse recovery charge (Qrr), lowering switching loss and improving efficiency above 100 kHz |
| Moisture sensitivity level 1 | Eliminates need for baking prior to reflow, streamlining SMT assembly for high-volume manufacturing |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance requirements for consumer, industrial, and lighting end equipment |
| UL 94V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical power supply designs |
Applications
| DC-DC Converter Output Rectification | Switch-Mode Lighting Inverter |
|---|---|
Use Scenario: High-efficiency isolated buck-boost converter delivering 12 V/1 A output from 36–72 V input in telecom power modules. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 1 A conduction and 30 A surge transients during startup. Use Value: 1.7 V VF and 75 ns trr minimize conduction and switching losses, sustaining >92% efficiency at full load. | Use Scenario: LED driver in commercial downlight using flyback topology operating at 65 kHz with 1000 V reflected voltage. IC Role / Device Role / Timing Role: Secondary-side rectifier clamping transformer reset energy and conducting LED current pulses. Use Value: 1000 V VRRM safely withstands reflected voltage spikes; 5 µA IR prevents standby current leakage. |
| Snubber Network Diode | Freewheeling Diode in Motor Drive |
Use Scenario: RC-snubber across MOSFET drain-source in 48 V BLDC gate driver to suppress voltage overshoot during turn-off. IC Role / Device Role / Timing Role: Fast-recovery path for snubber capacitor discharge, requiring sub-100 ns response. Use Value: 75 ns trr ensures rapid turn-on during voltage spike events, limiting peak drain voltage to <1.1× VBUS. | Use Scenario: Brushless motor control board with integrated half-bridge driving 24 V, 500 W PMSM load. IC Role / Device Role / Timing Role: Freewheeling path for inductive back-EMF during PWM off-time in each phase leg. Use Value: 30 A IFSM absorbs high-current flyback surges; 150 °C TJ max supports operation near heatsink-limited PCB zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U | Same 1 A / 600 V rating but lower VRRM; 1.15 V VF @ 1 A; 50 ns trr | Limited to ≤600 V circuits; better efficiency below 400 V, less margin in high-reflection flyback | Select when system peak reverse voltage ≤600 V and lowest VF is prioritized over voltage headroom |
| ON Semi MUR1100E | 1 A / 1000 V; 1.75 V VF @ 1 A; 100 ns trr; TO-277 package (no leads) | Higher VF and slower recovery increase switching loss; leadless package requires different layout and reflow profile | Choose only if TO-277 footprint is already standardized and thermal performance via direct die attach justifies trade-offs |
Compared with STTH1R06U and MUR1100E, US1M R3G delivers optimal balance of 1000 V rating, 1.7 V VF, and 75 ns trr in standard SMA package-enabling drop-in replacement in existing DO-214AC layouts while maintaining efficiency and safety margin in 700–1000 V applications.
Availability
US1M R3G is available at Aetrix Electronics and suitable for DC-DC converters, switch-mode lighting inverters, and freewheeling circuits requiring stable component supply, RoHS compliance, and high-voltage reliability.
Supply support for US1M 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, serving global industrial, computing, and consumer markets since 1979.
The US1x series was designed specifically as high-voltage ultrafast rectifiers for space-constrained, high-frequency power conversion-emphasizing low VF, fast trr, and robust thermal performance in standard SMD packages.
FAQ
What is the maximum junction temperature rating for US1M R3G?
The US1M R3G has a maximum junction temperature (TJ MAX) of +150°C, allowing operation in thermally demanding environments such as enclosed LED drivers or industrial DC-DC modules. This rating is validated per JEDEC standards and supported by its 27 °C/W junction-to-lead thermal resistance. Derating curves in the US1M R3G datasheet define safe operating current versus ambient temperature.
Does US1M R3G meet RoHS and halogen-free requirements?
Yes, US1M R3G is RoHS compliant and halogen-free per IEC 61249-2-21. The device uses matte tin-plated leads and UL 94V-0 molding compound, satisfying environmental mandates for consumer, industrial, and lighting applications. These compliance attributes are confirmed in Taiwan Semiconductor's official product documentation for the US1M R3G.
What is the reverse recovery time (trr) specification for US1M R3G?
The US1M R3G has a maximum reverse recovery time (trr) of 75 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast recovery enables efficient operation in high-frequency switch-mode power supplies above 100 kHz, reducing switching losses and EMI compared to standard recovery diodes. The value is specified in the Electrical Specifications table of the US1M R3G datasheet.
Is US1M R3G compatible with lead-free reflow soldering processes?
Yes, US1M R3G supports lead-free reflow soldering per J-STD-002. Its matte tin-plated leads are qualified for peak temperatures up to 260°C, and its moisture sensitivity level is rated Class 1 per J-STD-020-eliminating pre-bake requirements. The DO-214AC (SMA) package is fully compatible with standard SMT assembly lines processing US1M R3G.
How does the forward voltage (VF) of US1M R3G compare across temperature?
The US1M R3G exhibits a typical VF of 1.7 V at 1 A and 25°C, with positive temperature coefficient behavior-VF decreases slightly as junction temperature rises due to semiconductor physics. At 125°C, VF remains within specification limits, ensuring predictable conduction loss across the full -55°C to +150°C operating range defined for US1M R3G.
US1M 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):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1M R3G FAQ
1.How can I place an order for US1M R3G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1M 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 US1M R3G reliable?
The price and inventory of US1M R3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1M R3G is usually 5 days.
3.What payment methods are accepted for US1M R3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1M R3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1M R3G?
US1M R3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1M 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 US1M R3G?
For technical support, including US1M R3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1M R3G requirements.
6.How does Aetrix verify that US1M R3G is sourced from the original manufacturer or authorized distributors?
All US1M 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 US1M R3G meets industry standards.
7.What is the process for return or replacement of US1M R3G?
All US1M R3G units undergo pre-shipment inspection (PSI). If there is an issue with US1M 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 US1M R3G part is unused and in its original packaging.
Return procedure for US1M R3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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