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Diodes Incorporated US1NWF-7
- Part No.:
- US1NWF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
US1NWF-7.pdf
- Description:
- DIODE GEN PURP 1.2KV 1A SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:101,973
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Product details
Overview
US1NWF-7 from Diodes Incorporated is a 1.0A, 1200V ultra-fast surface-mount rectifier in SOD123F package, featuring 70–80 ns reverse recovery time, ≤2.0 V forward voltage at 1 A, and ≤5 µA reverse leakage at 1200 V/25°C. It serves as a boost diode in PFC circuits and secondary/freewheeling rectifier in high-frequency DC-DC and AC-AC converters for flat-panel displays and LED lighting.
For engineers reviewing the US1NWF-7 datasheet, US1NWF-7 pinout, US1NWF-7 application, or US1NWF-7 equivalent, key selection criteria include ultra-fast recovery (tRR ≤ 80 ns), low thermal resistance (RθJA = 82 °C/W on small pad), high-temperature operation (TJ up to +150°C), and RoHS-compliant green packaging with cathode band polarity marking.
Technical Context
The US1NWF-7 employs glass-passivated silicon die construction to ensure stable reverse blocking and low leakage across temperature. Its ultra-fast recovery is achieved via optimized carrier lifetime control, enabling efficient operation in switching frequencies up to several hundred kHz.
Designed for surface-mount reliability in compact power stages, it delivers 1 A average forward current with derating above +25°C (e.g., ~0.65 A at +100°C) and withstands 30 A non-repetitive surge (8.3 ms half-sine). The SOD123F package supports automated assembly and provides JEDEC-qualified mechanical robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1200 V - Withstands peak reverse voltage in PFC boost stages and offline SMPS outputs without breakdown. |
| IO | 1 A - Continuous DC forward current rating at +25°C ambient; derates to ~0.65 A at +100°C per Figure 1. |
| tRR | 70–80 ns - Enables high-frequency switching (>200 kHz) with minimal switching loss and EMI generation. |
| VF @ 1 A | ≤2.0 V - Limits conduction loss to ≤2.0 W at full load, critical for thermally constrained LED drivers and chargers. |
| IR @ 1200 V | ≤5 µA @ 25°C - Ensures low standby power loss in always-on consumer power supplies. |
| RθJA | 82 °C/W - Achieved on 0.2"×0.25" copper pad; enables 1 A operation with <100°C junction rise at +70°C ambient. |
| TJ Range | −55°C to +150°C - Supports automotive-adjacent and industrial-grade thermal environments without derating penalty. |
Pinout & Package
Package: SOD123F - Low-profile (max height 1.15 mm), molded green plastic (UL 94V-0), matte tin-plated copper leadframe, cathode band marked on top surface. Weight: 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node (e.g., MOSFET drain) in boost PFC or freewheeling path; requires low-inductance layout. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail; cathode band identifies polarity for automated optical inspection and placement verification. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures long-term stability of VRRM and IR under humidity and thermal cycling per JESD22-A101. |
| Ultra-fast tRR (70–80 ns) | Reduces reverse recovery charge (Qrr) to <15 nC, minimizing cross-conduction loss in synchronous rectification topologies. |
| SOD123F footprint | 0.81–1.15 mm A dimension enables PCB space savings vs. SMA/SMB; compatible with standard 0805 pick-and-place nozzles. |
| Halogen & antimony free | Meets IEC 61249-2-21: <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies EU EcoDesign and China RoHS II requirements. |
Applications
| Flat Panel Display Power | USB-C PD Charger Secondary |
|---|---|
Use Scenario: High-voltage bias supply for LCD backlight inverters and OLED gate drivers requiring stable 1200 V blocking. IC Role / Device Role / Timing Role: Boost rectifier in flyback-derived PFC stage, operating at 65–100 kHz with tight thermal constraints. Use Value: 80 ns tRR prevents tail current overlap during MOSFET turn-on, reducing dissipation by ≥15% vs. standard fast recovery diodes. | Use Scenario: Secondary-side output rectifier in 65 W USB-C PD adapter with GaN primary-side switching. IC Role / Device Role / Timing Role: Freewheeling diode in quasi-resonant flyback, handling 1 A continuous output with minimal voltage overshoot. Use Value: ≤2.0 V VF limits conduction loss to <2.0 W, enabling compact heatsink-free design in 30 mm × 30 mm PCB area. |
| LED Driver for Commercial Lighting | Industrial DC-DC Converter Freewheeling |
Use Scenario: Constant-current LED driver for parking lot luminaires operating outdoors from −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Output rectifier in buck-boost topology, conducting 1 A DC with 1200 V transient margin against lightning surges. Use Value: ≤5 µA IR at 125°C ensures <1 mW standby loss, meeting Energy Star v2.0 standby power limits. | Use Scenario: Freewheeling path in 24 V input, 5 V/3 A isolated DC-DC module for PLC I/O modules. IC Role / Device Role / Timing Role: Clamp diode across primary-side transformer winding, absorbing leakage inductance energy at 250 kHz switching. Use Value: RθJA = 82 °C/W allows full 1 A rating with only 25 mm² copper pour, eliminating need for thermal vias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | Same 1 A / 600 V rating but lower VRRM; tRR = 50 ns, VF = 1.7 V @ 1 A. | Not suitable for 1200 V PFC or offline SMPS outputs; limited to 24–48 V DC-DC secondaries. | Select only when system max reverse voltage ≤600 V and faster recovery is prioritized over voltage margin. |
| MBR1100F | 1 A / 1000 V Schottky; VF = 0.85 V @ 1 A but IR = 500 µA @ 125°C - 100× higher leakage than US1NWF-7. | Unsuitable for high-temp PFC where leakage-induced power loss dominates; usable only below +85°C ambient. | Prefer for low-VF efficiency in low-voltage, low-temperature applications; avoid in >100°C environments or high-blocking designs. |
Compared with STTH1L06S and MBR1100F, the US1NWF-7 uniquely balances 1200 V blocking, ultra-fast recovery, and low leakage across extended temperature - making it the only viable choice for thermally demanding, high-voltage consumer power stages.
Availability
US1NWF-7 is available at Aetrix Electronics and suitable for flat panel display power supplies, USB-C PD charger secondary rectification, and commercial LED lighting systems requiring stable component supply, JEDEC-qualified reliability, and RoHS-compliant green packaging.
Supply support for US1NWF-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 the Americas.
The US1NWF-7 belongs to Diodes' high-voltage ultra-fast rectifier product line, engineered specifically for efficiency-critical, high-temperature power conversion in consumer electronics and lighting applications.
FAQ
What is the maximum junction temperature and how does it affect derating?
The US1NWF-7 has a rated operating junction temperature range of −55°C to +150°C. At +150°C, its average forward current must be reduced to zero per Figure 1. Derating begins linearly above +25°C: at +100°C ambient, maximum IO is approximately 0.65 A on a 0.2"×0.25" copper pad (RθJA = 82 °C/W).
Is US1NWF-7 suitable for automotive applications?
The US1NWF-7 is not AEC-Q200 qualified. Diodes offers an automotive-compliant variant, US1NWFQ, which meets AEC-Q200 stress test requirements and is documented in a separate datasheet. For non-automotive industrial or consumer use, US1NWF-7 is fully qualified to JEDEC standards and rated for −55°C to +150°C operation.
How does the SOD123F package compare to SMA in thermal performance?
The SOD123F package has RθJA = 82 °C/W on a small copper pad, versus ~60 °C/W for SMA on identical board conditions. While SMA offers better thermal dissipation, SOD123F achieves superior space efficiency (≈40% smaller footprint) and is optimized for high-density layouts where board area is constrained more than thermal headroom.
What is the significance of glass passivation in this diode?
Glass passivation forms a hermetic, chemically inert layer over the silicon junction, preventing moisture ingress and ion migration. This ensures long-term stability of reverse leakage (IR) and breakdown voltage (VRRM) under thermal cycling and humid environments - critical for 10+ year reliability in LED lighting and display power supplies.
US1NWF-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):
- 1200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 80 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1200 V
- Capacitance @ Vr, F:
- 5pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1NWF-7 FAQ
1.How can I place an order for US1NWF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for US1NWF-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 US1NWF-7 reliable?
The price and inventory of US1NWF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1NWF-7 is usually 5 days.
3.What payment methods are accepted for US1NWF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1NWF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1NWF-7?
US1NWF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1NWF-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 US1NWF-7?
For technical support, including US1NWF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1NWF-7 requirements.
6.How does Aetrix verify that US1NWF-7 is sourced from the original manufacturer or authorized distributors?
All US1NWF-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 US1NWF-7 meets industry standards.
7.What is the process for return or replacement of US1NWF-7?
All US1NWF-7 units undergo pre-shipment inspection (PSI). If there is an issue with US1NWF-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 US1NWF-7 part is unused and in its original packaging.
Return procedure for US1NWF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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