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Diodes Incorporated US1DWFQ-7
- Part No.:
- US1DWFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
US1DWFQ-7.pdf
- Description:
- DIODE GEN PURP 200V 1A SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,584
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Product details
Overview
US1DWFQ-7 from Diodes Incorporated is a 1.0A, 200V ultra-fast surface-mount rectifier in SOD123F package, featuring 35ns reverse recovery time, 0.95V max forward voltage at 1A/25°C, and 5µA max reverse leakage at 200V/25°C; it serves as a boost diode in PFC stages and secondary rectifier in high-frequency DC-DC converters for LED lighting and flat-panel display power supplies.
For engineers reviewing the US1DWFQ-7 datasheet, US1DWFQ-7 pinout, US1DWFQ-7 application, or US1DWFQ-7 equivalent, key selection criteria include ultra-fast recovery (tRR ≤ 35ns), low VF (≤0.95V @1A), AEC-Q101 qualification, thermal resistance (RθJA = 87°C/W on optimized PCB), and SOD123F footprint compatibility with space-constrained consumer and automotive power designs.
Technical Context
This device is a silicon planar epitaxial ultra-fast recovery rectifier with glass-passivated junction, designed for high-efficiency switching operation up to several hundred kHz. Its 35ns tRR and low stored charge minimize switching losses during turn-off in boost and flyback topologies.
The SOD123F package enables compact layout while delivering RθJA of 87°C/W on a 0.4" × 0.5" 2oz copper pad - critical for thermal management in enclosed LED drivers and automotive cabin modules operating up to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Blocks up to 200V reverse voltage without breakdown, suitable for 120VAC input PFC and 24VDC system freewheeling |
| IO(AV) | 1.0 A - Continuous DC output current rating at +25°C ambient; derates to ~0.6A at +100°C per Figure 1 |
| VF Max | 0.95 V @ 1A, 25°C - Low conduction loss improves efficiency in high-duty-cycle boost diodes |
| tRR | 35 ns - Ultra-fast recovery reduces switching noise and EMI in >100kHz SMPS designs |
| IR Max | 5 µA @ 200V, 25°C - Low leakage maintains regulation stability in high-impedance feedback paths |
| RθJA | 87 °C/W - Measured on 0.4" × 0.5" 2oz FR-4 pad; enables 1W dissipation with <87°C junction rise above ambient |
Pinout & Package
Package: SOD123F - low-profile (max height 1.15mm), surface-mount plastic package with cathode band marking; weight 0.016g; RoHS-compliant matte tin finish on copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to switch node (e.g., MOSFET drain) in boost PFC or transformer secondary in flyback |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output capacitor or load rail; polarity must be observed to prevent reverse bias failure |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (tRR ≤ 35ns) | Reduces turn-off switching loss and associated EMI in high-frequency DC-DC converters |
| Low VF (0.95V max @1A) | Lowers conduction loss by ~15% vs. standard fast rectifiers, improving thermal margin in sealed LED drivers |
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications including infotainment power supplies |
| SOD123F footprint | Enables PCB area reduction vs. SMA/SMB; compatible with automated pick-and-place and reflow profiles |
Applications
| LED Lighting Power Supplies | Flat Panel Display Backlight Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback LED drivers for commercial signage and architectural lighting. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during transformer reset phase; handles 1A pulsed output current at 65–130kHz. Use Value: 35ns tRR minimizes voltage overshoot across primary MOSFET; low VF sustains >90% efficiency at full load. | Use Scenario: Boost diode in PFC stage of CCFL or LED backlight inverters for LCD TVs and monitors. IC Role / Device Role / Timing Role: Conducts during rising edge of AC line cycle; blocks reverse voltage during falling edge with 200V rating. Use Value: 5µA IR at 25°C prevents capacitor discharge drift in high-impedance feedback networks. |
| Automotive Cabin Power Modules | USB-C PD Adapter Secondary Rectification |
Use Scenario: Output rectifier in 12V-to-5V buck-derived auxiliary supplies for HVAC control and digital clusters. IC Role / Device Role / Timing Role: Freewheeling path for synchronous or non-synchronous buck converter; operates continuously at +105°C ambient. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; RθJA = 87°C/W supports derating to 0.7A at +105°C. | Use Scenario: Secondary-side rectification in 65W USB-C PD adapters using active clamp flyback topology. IC Role / Device Role / Timing Role: Handles 1A average output current with 300kHz switching; recovers before next gate pulse. Use Value: 0.95V VF limits power loss to <1W at full load, reducing heatsink requirements in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ES1DQ-13-F | Same 200V/1A rating, but tRR = 35ns (typ), VF = 0.95V (max); SOD123 package (slightly larger footprint than SOD123F) | Not AEC-Q101 qualified; intended for industrial/commercial only | Select if AEC-Q101 not required and SOD123 pad compatibility exists |
| US1D-E3/5AT | Identical electrical specs, but in DO-214AC (SMA) package; RθJA = 65°C/W, higher profile (2.3mm) | Better thermal performance but occupies 3× PCB area; not suitable for ultra-thin displays | Select when thermal headroom > electrical performance; avoid in height-constrained designs |
Compared with ES1DQ-13-F and US1D-E3/5AT, the US1DWFQ-7 uniquely combines AEC-Q101 qualification, SOD123F's 1.15mm max height, and verified 87°C/W thermal resistance - making it optimal for automotive and slim-profile consumer power where reliability and space are co-constrained.
Availability
US1DWFQ-7 is available at Aetrix Electronics and suitable for LED lighting power supplies, flat panel display inverters, and automotive cabin power modules requiring stable component supply and long-term lifecycle support.
Supply support for US1DWFQ-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 US1DWFQ-7 belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-frequency, high-reliability power conversion in automotive, consumer, and industrial applications where low VF, fast tRR, and AEC-Q101 compliance are mandatory.
FAQ
Is US1DWFQ-7 suitable for automotive applications?
Yes - US1DWFQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. It operates reliably from −55°C to +150°C junction temperature and meets automotive-grade reliability testing for vibration, thermal cycling, and humidity exposure.
What is the maximum allowable junction temperature?
The absolute maximum junction temperature is +150°C. At this limit, the device delivers rated 1.0A IO only with sufficient heatsinking - typical design practice limits TJ to ≤135°C for 10-year reliability in automotive environments.
Does US1DWFQ-7 have a halogen-free and RoHS-compliant construction?
Yes - US1DWFQ-7 uses a "Green" molding compound with <900ppm bromine, <900ppm chlorine, and <1000ppm antimony; it complies with EU RoHS 2015/863/EU and is lead-free with matte tin terminal finish per MIL-STD-202.
How does SOD123F compare thermally to SMA (DO-214AC) packages?
SOD123F has higher RθJA (87°C/W) than SMA (65°C/W) due to smaller copper pad area and lower thermal mass. However, its lower profile allows tighter board stacking and better airflow in thin enclosures - trade-off favors SOD123F where height is constrained and ambient temperature remains ≤+105°C.
US1DWFQ-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):
- 200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 14pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1DWFQ-7 FAQ
1.How can I place an order for US1DWFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for US1DWFQ-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 US1DWFQ-7 reliable?
The price and inventory of US1DWFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1DWFQ-7 is usually 5 days.
3.What payment methods are accepted for US1DWFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1DWFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1DWFQ-7?
US1DWFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1DWFQ-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 US1DWFQ-7?
For technical support, including US1DWFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1DWFQ-7 requirements.
6.How does Aetrix verify that US1DWFQ-7 is sourced from the original manufacturer or authorized distributors?
All US1DWFQ-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 US1DWFQ-7 meets industry standards.
7.What is the process for return or replacement of US1DWFQ-7?
All US1DWFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with US1DWFQ-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 US1DWFQ-7 part is unused and in its original packaging.
Return procedure for US1DWFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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