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Diodes Incorporated US1GWF-7
- Part No.:
- US1GWF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
US1GWF-7.pdf
- Description:
- DIODE GEN PURP 400V 1A SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:337,977
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Product details
Overview
US1GWF-7 from Diodes Incorporated is a 1.0A, 400V ultra-fast surface-mount rectifier in SOD123F package, optimized for boost diode roles in PFC circuits and secondary rectification in high-frequency DC-DC converters operating up to +150°C ambient. Confirmed parameters: VRRM = 400 V, IO = 1 A, VF(max) = 1.25 V @ 1 A / 25°C, tRR = 35 ns, IR(max) = 10 µA @ 400 V / 25°C. Used in LED lighting power stages and flat-panel display power supplies.
For engineers reviewing the US1GWF-7 datasheet, US1GWF-7 pinout, US1GWF-7 application, or US1GWF-7 equivalent, key selection criteria include ultrafast recovery (tRR ≤ 35 ns), low leakage (<10 µA at 400 V), thermal robustness (TJ up to +150°C), and SOD123F footprint compatibility with high-density PCB layouts in consumer power electronics.
Technical Context
The US1GWF-7 employs glass-passivated silicon die to achieve stable reverse blocking and low leakage across temperature. Its ultrafast recovery (28–35 ns) minimizes switching losses in 100 kHz–1 MHz DC-DC topologies where diode reverse recovery directly impacts efficiency and EMI.
Designed for high-temperature operation, it maintains rated IO = 1 A up to +125°C ambient (derated per Figure 5), supported by RθJA = 95 °C/W on compact 0.4"×0.5" copper pad - critical for thermally constrained consumer power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Withstands peak reverse transients in 230 VAC-derived PFC boost stages without breakdown. |
| IO | 1 A continuous - Supports output power up to ~15 W in secondary-side rectification of isolated flyback converters. |
| VF (max) | 1.25 V @ 1 A / 25°C - Limits conduction loss to ≤1.25 W, enabling >90% efficiency in low-voltage, high-current LED driver outputs. |
| tRR | 35 ns - Reduces turn-off tail current and associated switching loss in 500 kHz+ synchronous rectifier-assisted designs. |
| IR (max) | 10 µA @ 400 V / 25°C - Ensures minimal standby power drain in always-on display auxiliary supplies. |
| TJ Range | −55°C to +150°C - Validated for operation inside sealed LED luminaires and hot-plug charger enclosures without derating. |
Pinout & Package
Package: SOD123F - Low-profile (1.15 mm max height), surface-mount plastic package with cathode band marking; JEDEC-compliant footprint (D = 1.80 mm, E = 2.70 mm, He = 3.50 mm); RoHS-compliant matte tin finish on copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to switch node or transformer secondary winding; must handle 30 A non-repetitive surge during startup. |
| Cathode | Forward current exit / reverse voltage reference | Connected to output capacitor or load; marked by visible band; defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enables stable IR <10 µA at 400 V and +100°C, preventing thermal runaway in enclosed LED drivers. |
| Ultrafast recovery (tRR ≤ 35 ns) | Reduces reverse recovery charge Qrr to <15 nC, lowering EMI generation in high-frequency SMPS. |
| SOD123F low-profile package | 0.016 g mass and 1.15 mm height allow use in space-constrained flat-panel display power boards. |
| JEDEC-qualified reliability | Meets AEC-Q200 stress test requirements for high-reliability consumer applications (e.g., smart TV power supplies). |
Applications
| Flat Panel Display Power Supply | USB-C PD Charger Secondary Rectifier |
|---|---|
Use Scenario: Secondary-side rectification in 65 W GaN-based USB-C PD charger flyback converter operating at 200 kHz. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during transformer reset phase; synchronously gated in advanced designs. Use Value: 35 ns tRR reduces voltage overshoot across primary switch, enabling lower-voltage MOSFET selection and 0.5% system efficiency gain. | Use Scenario: Output rectification in slim-profile 43 mm × 43 mm × 20 mm smart TV main board power module. IC Role / Device Role / Timing Role: Boost diode in active PFC stage feeding 385 V DC bus; operates continuously at +105°C board temperature. Use Value: 10 µA IR at 400 V prevents >10 mW standby loss, meeting Energy Star Tier 2 requirements. |
| LED Driver Freewheeling Diode | Industrial AC-DC Adapter Output Stage |
Use Scenario: Freewheeling path in constant-current buck LED driver powering 12 V, 0.7 A automotive-grade interior lighting. IC Role / Device Role / Timing Role: Provides current continuity during MOSFET off-time; handles 1 A DC + 0.3 A ripple. Use Value: 1.25 V VF limits forward drop to <1.3 V at full load, minimizing thermal rise in thermally isolated LED housing. | Use Scenario: Output rectifier in universal-input (90–264 VAC), 24 V/1 A industrial AC-DC adapter rated for −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Primary output rectifier in dual-output forward converter; exposed to 150°C local hotspot near transformer. Use Value: +150°C TJ rating allows uninterrupted operation without derating, eliminating need for oversized heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| US1G-E3/5AT (Vishay) | VRRM = 400 V, tRR = 50 ns, IR = 5 µA @ 25°C - slower recovery, lower leakage. | Less suitable for >300 kHz operation due to higher Qrr; acceptable in 60–120 kHz legacy adapters. | Select when cost sensitivity outweighs switching loss; verify layout clearance for larger DO-214AC footprint. |
| ES1G (ON Semiconductor) | VRRM = 400 V, tRR = 35 ns, VF = 1.7 V @ 1 A - same speed, higher forward drop. | Higher conduction loss increases thermal stress in sealed LED housings above +85°C ambient. | Prefer only if SOD123F footprint unavailable; requires thermal derating to 0.75 A at +100°C. |
Compared with US1G-E3/5AT and ES1G, the US1GWF-7 uniquely balances ultrafast recovery (≤35 ns), low VF (≤1.25 V), and high-temperature leakage control (≤10 µA @ 100°C), making it optimal for compact, high-efficiency consumer power stages where thermal density and EMI are constrained.
Availability
US1GWF-7 is available at Aetrix Electronics and suitable for flat panel display power supplies, USB-C PD chargers, and LED lighting systems requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant sourcing.
Supply support for US1GWF-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The US1GWF-7 belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-frequency, high-temperature power conversion in space-constrained consumer electronics - emphasizing low leakage, fast recovery, and robust thermal performance.
FAQ
What is the maximum junction temperature and how does it affect derating?
The US1GWF-7 has a maximum junction temperature of +150°C. Its average forward current derates linearly from 1.0 A at +25°C ambient to 0.5 A at +125°C ambient (per Figure 5), based on RθJA = 95 °C/W on a 0.4"×0.5" copper pad. Exceeding this limit risks parametric shift and accelerated wear-out.
Is US1GWF-7 suitable for automotive applications?
The US1GWF-7 is not automotive-qualified; however, its automotive-grade variant US1GWFQ is separately qualified to AEC-Q101. The standard US1GWF-7 meets JEDEC reliability standards for high-reliability consumer use but lacks automotive-specific stress testing and PPAP documentation.
How does the SOD123F package compare to SMA in thermal performance?
The SOD123F package delivers RθJA = 95 °C/W (on 0.4"×0.5" pad), versus ~120–140 °C/W for SMA under identical conditions. Its smaller footprint and lower thermal mass enable faster transient response but require tighter layout control for solder joint reliability at high thermal cycles.
What is the significance of glass passivation in this diode?
Glass passivation protects the silicon PN junction from moisture, ionic contamination, and mechanical stress, ensuring long-term stability of reverse leakage (IR) and breakdown voltage (V(BR)R) - critical for maintaining <10 µA leakage over 10-year life in humid consumer environments like LED luminaires.
US1GWF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- 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:
- 1.25 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 400 V
- Capacitance @ Vr, F:
- 9pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1GWF-7 FAQ
1.How can I place an order for US1GWF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for US1GWF-7 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 US1GWF-7 reliable?
The price and inventory of US1GWF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1GWF-7 is usually 5 days.
3.What payment methods are accepted for US1GWF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1GWF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1GWF-7?
US1GWF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1GWF-7 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 US1GWF-7?
For technical support, including US1GWF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1GWF-7 requirements.
6.How does Aetrix verify that US1GWF-7 is sourced from the original manufacturer or authorized distributors?
All US1GWF-7 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 US1GWF-7 meets industry standards.
7.What is the process for return or replacement of US1GWF-7?
All US1GWF-7 units undergo pre-shipment inspection (PSI). If there is an issue with US1GWF-7, 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 US1GWF-7 part is unused and in its original packaging.
Return procedure for US1GWF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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