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Taiwan Semiconductor Corporation US1GH
- Part No.:
- US1GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1GH.pdf
- Description:
- DIODE GEN PURP 400V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:14,970
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Product details
Overview
US1GH from Taiwan Semiconductor is a 1A, 400V 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 US1GH datasheet, US1GH pinout, US1GH application, or US1GH equivalent, key selection criteria include repetitive peak reverse voltage (400 V), ultrafast recovery (≤50 ns), thermal resistance (RθJL = 27 °C/W), AEC-Q101 compliance, and DO-214AC mechanical compatibility with automated SMT assembly.
Technical Context
The US1GH is a single-die, silicon planar epitaxial ultrafast rectifier optimized for high-frequency switching applications. Its glass-passivated junction ensures stable performance under thermal cycling, while the low Qrr and fast trr support efficiency in snubberless flyback and synchronous rectification auxiliary paths.
Designed for operation up to 150 °C junction temperature, it delivers 30 A non-repetitive surge capability and maintains ≤5 µA reverse leakage at 25 °C - critical for low-power standby regulation and automotive lighting drivers where leakage-induced quiescent current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - supports input rails up to 280 V DC in industrial power supplies without derating |
| IF | 1 A continuous - rated for sustained conduction in 12–48 V output stage freewheeling paths |
| trr | 50 ns max - enables >100 kHz switching in DC-DC converters with minimal switching loss |
| VF | 1.0 V max at 1 A, 25 °C - reduces conduction loss by ~15% vs. standard fast rectifiers |
| RθJL | 27 °C/W - allows direct PCB copper pour heatsinking without external thermal pads |
| IR | 5 µA max at 25 °C - ensures <1 µA system-level standby current in automotive body control modules |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.060 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter); requires adequate trace width for 1 A RMS |
| Cathode (lead 2) | Current exit point during forward conduction; reverse-blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive); cathode band orientation must match PCB silkscreen |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114 |
| Glass passivated junction | Eliminates moisture ingress risk and prevents parameter drift over 15+ year service life in humid environments |
| Ultrafast 50 ns trr | Reduces reverse recovery charge (Qrr) to <15 nC - critical for minimizing EMI in CISPR-25-compliant vehicle systems |
| Moisture sensitivity level 1 | Enables unlimited floor life before reflow; no baking required prior to SMT assembly |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - supports green manufacturing and end-of-life recycling |
Applications
| DC-DC Converter | Automotive Lighting |
|---|---|
Use Scenario: Secondary-side rectification in 12 V → 5 V/3.3 V isolated flyback converters for infotainment power rails. IC Role / Device Role / Timing Role: Ultrafast freewheeling diode providing low-loss unidirectional current path during MOSFET off-time. Use Value: 50 ns trr and 1.0 V VF reduce total power loss by ≥0.3 W vs. standard FR107, improving thermal margin in sealed head-unit enclosures. | Use Scenario: LED driver freewheeling path in adaptive front-lighting systems (AFS) with PWM dimming. IC Role / Device Role / Timing Role: Snubberless flyback catch diode handling 1 A pulsed current at 200–500 Hz switching frequency. Use Value: AEC-Q101 qualification and 150 °C TJMAX ensure reliable operation under hood temperatures up to 125 °C ambient. |
| Snubber Network | Freewheeling Application |
Use Scenario: Voltage clamping element in RCD snubbers across primary-side MOSFETs in 48 V automotive DC-DC modules. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive kick energy during MOSFET turn-off transitions. Use Value: 400 V VRRM and 30 A IFSM withstand transient spikes up to 350 V with <10 ns delay, preventing MOSFET avalanche failure. | Use Scenario: Inductor current recirculation path in brushed DC motor controllers for power seats and window lifts. IC Role / Device Role / Timing Role: Unidirectional current steering device maintaining coil current continuity during PWM gate drive interruption. Use Value: Low 5 µA IR at 25 °C avoids battery drain in parked-vehicle mode; DO-214AC footprint enables compact dual-diode layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same 1 A / 400 V rating; trr = 35 ns (faster), but not AEC-Q101 qualified; RθJA = 90 °C/W (higher) | Suitable for industrial SMPS where automotive qualification is unnecessary | Prefer US1GH when AEC-Q101 compliance or lower thermal resistance is required |
| ON Semi MUR140 | Same DO-214AC package; trr = 50 ns; VF = 1.25 V (higher); no AEC-Q101 certification | Acceptable for cost-sensitive consumer power adapters with relaxed thermal targets | Choose US1GH for automotive or thermally constrained designs requiring ≤1.0 V VF and validated reliability |
Compared with STTH1R04 and MUR140, the US1GH uniquely combines AEC-Q101 qualification, 27 °C/W junction-to-lead thermal resistance, and guaranteed ≤1.0 V forward drop - making it the only option among the three qualified for under-hood automotive deployment with minimal heatsinking.
Availability
US1GH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converter secondary-side rectification, and freewheeling applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for US1GH 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 automotive, industrial, and consumer markets since 1979.
The US1GH belongs to TSC's US1xH ultrafast rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion in automotive and industrial environments where fast recovery, low leakage, and thermal robustness are mandatory.
FAQ
What is the maximum junction temperature rating for the US1GH?
The US1GH has a maximum junction temperature (TJMAX) of +150 °C, verified per AEC-Q101 stress testing. This rating enables reliable operation in under-hood automotive applications where ambient temperatures reach 125 °C, provided PCB thermal design maintains junction-to-lead thermal resistance at or below the specified 27 °C/W. The US1GH's glass-passivated die ensures parametric stability across this full range.
Is the US1GH pin-compatible with other devices in the US1xH series?
Yes - all US1xH devices, including US1GH, share identical DO-214AC (SMA) package dimensions, lead pitch, and cathode-band polarity marking. The US1GH uses the same anode/cathode terminal configuration as US1AH through US1MH, enabling board-level voltage-rating upgrades without layout changes. However, electrical parameters such as VRRM, VF, and trr vary by variant and must be verified per application requirements.
Does the US1GH meet automotive reliability standards?
Yes, the US1GH is AEC-Q101 qualified, having passed temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) tests per JESD22-A114. It also complies with J-STD-020 moisture sensitivity level 1 and JESD201 class 2 whisker testing - confirming suitability for automotive power electronics including body control modules and lighting drivers.
What is the reverse recovery time specification for the US1GH?
The US1GH 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 recovery enables efficient operation in switching power supplies above 100 kHz. The US1GH's trr is confirmed in the official TSC datasheet Version A2102 and applies exclusively to the US1GH variant - not to higher-voltage members like US1JH (75 ns).
Can the US1GH be used in surface-mount reflow processes without preconditioning?
Yes - the US1GH is rated at moisture sensitivity level (MSL) 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and requires no baking before reflow soldering. Its matte tin-plated leads are solderable per J-STD-002, and the UL 94V-0 epoxy compound withstands peak reflow temperatures up to 260 °C for 10 seconds - fully compatible with standard lead-free PCB assembly lines.
US1GH 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):
- 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
US1GH FAQ
1.How can I place an order for US1GH through Aetrix?
Please submit a Request for Quotation (RFQ) for US1GH 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 US1GH reliable?
The price and inventory of US1GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1GH is usually 5 days.
3.What payment methods are accepted for US1GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1GH?
US1GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1GH 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 US1GH?
For technical support, including US1GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1GH requirements.
6.How does Aetrix verify that US1GH is sourced from the original manufacturer or authorized distributors?
All US1GH 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 US1GH meets industry standards.
7.What is the process for return or replacement of US1GH?
All US1GH units undergo pre-shipment inspection (PSI). If there is an issue with US1GH, 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 US1GH part is unused and in its original packaging.
Return procedure for US1GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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