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Taiwan Semiconductor Corporation US1GHR3G
- Part No.:
- US1GHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1GHR3G.pdf
- Description:
- DIODE GEN PURP 400V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,706
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Product details
Overview
US1GHR3G from Taiwan Semiconductor is a 400 V, 1 A ultrafast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 50 ns reverse recovery time, 1.0 V typical forward voltage at 1 A, and 30 A peak surge current - deployed in DC-DC converters and snubber circuits for high-efficiency power conversion.
For engineers reviewing the US1GHR3G datasheet, US1GHR3G pinout, US1GHR3G application, or US1GHR3G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (RθJL = 27 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for industrial and lighting power designs.
Technical Context
This device is a single-die, glass-passivated silicon PN junction rectifier optimized for high-frequency switching applications. Its ultrafast recovery (trr ≤ 50 ns) minimizes switching losses, while low forward voltage (VF ≤ 1.0 V @ 1 A, 25 °C) reduces conduction loss in compact power supplies.
The DO-214AC (SMA) package provides robust thermal performance (RθJA = 75 °C/W) and moisture sensitivity level 1 handling, supporting automated SMT placement without baking. Polarity is marked by a cathode band, and terminals are matte tin-plated per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum non-repetitive reverse voltage the diode blocks reliably in circuit |
| IF | 1 A continuous - rated average forward current under specified thermal conditions |
| trr | ≤ 50 ns - enables operation up to ~10 MHz switching frequencies with minimal recovery loss |
| VF | ≤ 1.0 V @ 1 A, 25 °C - limits I²R conduction loss and self-heating in high-duty-cycle operation |
| RθJL | 27 °C/W - defines temperature rise from junction to lead, critical for PCB copper pour design |
| IFSM | 30 A @ 8.3 ms - supports brief inrush/surge events without bond wire failure |
| Junction temp | –55 to +150 °C - specifies full operational range for automotive under-hood or industrial ambient use |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band on body. Matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of load or switch node; must handle full IF and IFSM |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to higher-potential rail; withstands full VRRM during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage performance (IR ≤ 5 µA @ 25 °C) and long-term reliability under humidity stress |
| Ultrafast recovery (trr ≤ 50 ns) | Reduces reverse recovery charge (Qrr) and associated EMI in >100 kHz SMPS topologies |
| Moisture sensitivity level 1 | Eliminates pre-bake requirement for SMT assembly, lowering manufacturing cost and cycle time |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Output rectifier conducting unidirectional current during transformer reset phase. Use Value: Low VF and fast trr directly improve efficiency by reducing conduction and switching losses at high frequency. | Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC or industrial pumps. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when high-side switch turns off. Use Value: 30 A IFSM rating handles motor inductive kickback; 400 V VRRM supports 24–300 V DC bus designs. |
| LED Driver Snubber | Lighting Power Supply |
Use Scenario: RC snubber network across MOSFET or relay contacts in constant-current LED drivers. IC Role / Device Role / Timing Role: Clamps voltage spikes during turn-off using fast reverse recovery to absorb transient energy. Use Value: 50 ns trr ensures rapid re-blocking after spike absorption, preventing false triggering or oscillation. | Use Scenario: Input bridge or output rectification in Class II LED drivers for commercial downlights. IC Role / Device Role / Timing Role: Converts AC line to DC bus or regulates output current via synchronous rectification control. Use Value: DO-214AC package enables high-density layout; halogen-free construction satisfies 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 |
|---|---|---|---|
| STTH1R04 | VRRM = 400 V, trr = 35 ns, VF = 1.15 V @ 1 A - faster but higher forward drop | Better suited for <200 ns switching nodes where Qrr dominates loss | Select STTH1R04 if system EMI or recovery loss exceeds 5% of total loss budget |
| ES1D-E3/54 | VRRM = 200 V, trr = 35 ns, IF = 1 A - lower voltage rating, same package | Limited to sub-200 V DC bus or auxiliary supply rails | Choose ES1D-E3/54 only when VRRM margin ≥ 2× max expected transient voltage |
Compared with STTH1R04 and ES1D-E3/54, US1GHR3G offers optimal balance of 400 V blocking, 50 ns recovery, and 1.0 V VF - making it preferred for cost-sensitive 24–48 V industrial DC-DC and lighting converters requiring JEDEC-compliant MSL-1 handling.
Availability
US1GHR3G is available at Aetrix Electronics and suitable for DC-DC converters, LED driver snubbers, and switching inverters requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for US1GHR3G 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 for high-frequency, high-reliability rectification in space-constrained power supplies - emphasizing low VF, fast trr, and robust MSL-1 manufacturability.
FAQ
What is the maximum junction temperature for US1GHR3G?
The US1GHR3G has a maximum junction temperature (TJ) of +150 °C, with a minimum of –55 °C. This wide operating range allows deployment in environments such as enclosed LED drivers or industrial motor controls where ambient temperatures exceed 85 °C. Derating curves in the US1A–US1M datasheet confirm usable current capacity down to 0.5 A at 125 °C ambient with adequate PCB copper area.
Is US1GHR3G compatible with lead-free reflow soldering processes?
Yes, US1GHR3G supports lead-free reflow per J-STD-020. Its DO-214AC (SMA) package uses matte tin-plated leads qualified to J-STD-002 for solderability, and its molding compound meets UL 94V-0 flammability rating. The device is rated MSL-1, meaning it can be placed directly onto PCBs without baking prior to reflow.
What does the 'G' in US1GHR3G signify?
The 'G' in US1GHR3G denotes the 400 V repetitive peak reverse voltage (VRRM) rating within the US1x family - where A=50 V, B=100 V, D=200 V, G=400 V, J=600 V, K=800 V, and M=1000 V. The 'HR3G' suffix indicates tape-and-reel packaging (7,500 pcs/reel) and green compound per TSC's internal coding.
How does US1GHR3G compare to standard recovery rectifiers in switching applications?
US1GHR3G delivers significantly lower switching losses than standard recovery rectifiers due to its ≤50 ns reverse recovery time and low Qrr. In a 250 kHz flyback converter, this reduces diode-related losses by ~35% versus a 1N4007, enabling smaller heatsinks and higher power density. Its 1.0 V VF also cuts conduction loss relative to slower, higher-VF alternatives.
Can US1GHR3G be used in bidirectional current paths?
No, US1GHR3G is a unidirectional rectifier diode and cannot conduct current in reverse bias beyond its rated leakage (≤5 µA @ 25 °C). It is not rated for reverse conduction or symmetrical switching. For bidirectional applications such as AC switching or synchronous rectification control, discrete MOSFETs or dedicated bidirectional switches must be used instead of US1GHR3G.
US1GHR3G 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):
- 400 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 @ 400 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
US1GHR3G FAQ
1.How can I place an order for US1GHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1GHR3G 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 US1GHR3G reliable?
The price and inventory of US1GHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1GHR3G is usually 5 days.
3.What payment methods are accepted for US1GHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1GHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1GHR3G?
US1GHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1GHR3G 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 US1GHR3G?
For technical support, including US1GHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1GHR3G requirements.
6.How does Aetrix verify that US1GHR3G is sourced from the original manufacturer or authorized distributors?
All US1GHR3G 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 US1GHR3G meets industry standards.
7.What is the process for return or replacement of US1GHR3G?
All US1GHR3G units undergo pre-shipment inspection (PSI). If there is an issue with US1GHR3G, 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 US1GHR3G part is unused and in its original packaging.
Return procedure for US1GHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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