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Diodes Incorporated SF1GDF-13
- Part No.:
- SF1GDF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
SF1GDF-13.pdf
- Description:
- DIODE GEN PURP 400V 1A DFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:6,969
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Product details
Overview
SF1GDF-13 from Diodes Incorporated is a 400 V, 1.0 A surface-mount superfast rectifier diode in D-FLAT package, designed for secondary-side rectification and freewheeling in high-frequency AC-DC and DC-DC converters. It delivers 1.3 V max forward voltage at 1 A, 5 µA max reverse leakage at 25°C, 35 ns reverse recovery time, and operates up to +150°C junction temperature-ideal for compact, thermally constrained consumer power adapters.
For engineers reviewing the SF1GDF-13 datasheet, SF1GDF-13 pinout, SF1GDF-13 application, or SF1GDF-13 equivalent, key selection criteria include its 400 V blocking rating, superfast 35 ns recovery, low-profile D-FLAT thermal performance (RθJA = 87°C/W), and RoHS-compliant lead-free construction suitable for high-density PCB layouts.
Technical Context
This superfast rectifier uses a planar epitaxial silicon structure with glass passivation to achieve stable reverse characteristics and rapid carrier recombination. Its 35 ns reverse recovery time (measured at IF = 0.5 A, IR = 1 A, IRR = 0.25 A) enables efficient operation in 100–500 kHz switching topologies without excessive switching loss or EMI.
The D-FLAT package provides low thermal resistance (RθJT = 36°C/W) via direct copper leadframe exposure, supporting 1.0 A average current at TT = +110°C on standard FR-4 PCBs. Its 20 pF typical junction capacitance minimizes capacitive coupling in high-dv/dt environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Sustains peak reverse voltage in boost PFC and flyback secondary circuits without breakdown. |
| IO | 1.0 A @ TT = +110°C - Rated continuous output current under real-world board-level thermal conditions. |
| VF Max | 1.3 V @ IF = 1 A - Low conduction loss improves efficiency in 5–24 V output DC-DC stages. |
| tRR | 35 ns - Enables clean turn-off in high-frequency SMPS, reducing switching noise and snubber losses. |
| IR Max | 5 µA @ 25°C - Ensures minimal standby power loss in energy-sensitive consumer chargers. |
| RθJA | 87°C/W - Predictable thermal rise on 0.4" × 0.5" 2 oz copper pad, critical for thermal margin validation. |
Pinout & Package
D-FLAT package: ultra-thin (max 1.10 mm height), molded green plastic case (UL 94V-0), matte tin-plated copper leadframe, cathode band polarity marking, 0.062 g weight. Optimized for automated placement and reflow soldering on high-density boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or transformer secondary winding; requires low-inductance layout to minimize ringing. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output capacitor or ground return; cathode band identifies orientation during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and stable leakage current across -55°C to +150°C operating range. |
| Superfast 35 ns recovery | Reduces reverse recovery charge (QRR) to <15 nC, lowering EMI and enabling higher switching frequencies. |
| Low 1.3 V forward drop | Minimizes conduction loss (1.3 W max at 1 A), easing thermal design in sealed adapter enclosures. |
| D-FLAT low-profile package | Enables ≤1.1 mm board thickness in ultra-slim USB-C chargers and IoT power modules. |
Applications
| USB-C Power Adapters | LED Driver Secondary Rectification |
|---|---|
Use Scenario: 20–65 W compact wall adapters with GaN primary-side switching. IC Role / Device Role: Secondary-side freewheeling diode in quasi-resonant flyback topology. Use Value: 35 ns tRR prevents cross-conduction loss with synchronous rectifiers; 1.3 V VF maintains >90% efficiency at full load. | Use Scenario: Constant-current LED drivers for architectural and commercial lighting. IC Role / Device Role: Output rectifier in isolated buck-boost or SEPIC-derived topologies. Use Value: 5 µA IR ensures negligible standby current; D-FLAT footprint fits tight spacing between driver IC and output caps. |
| Industrial DC-DC Modules | Home Appliance Power Supplies |
Use Scenario: 12 V/24 V input DC-DC converters in PLC I/O modules and sensors. IC Role / Device Role: Input rectifier for wide-input-range offline-capable modules. Use Value: 400 V VRRM supports 305 VAC surge immunity; RθJA = 87°C/W allows derating to 0.8 A at +85°C ambient. | Use Scenario: Main power supply in smart refrigerators, washing machines, and HVAC controllers. IC Role / Device Role: Freewheeling diode in relay/snubber and motor control auxiliary supplies. Use Value: Glass passivation withstands humidity and thermal cycling per IEC 60747-5-2; RoHS/"Green" compliance meets regional eco-regulations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar superfast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-TB | 40 V VRRM, 1 A, Schottky; no reverse recovery (tRR = 0 ns), but limited to low-voltage outputs. | Only suitable for ≤24 V secondary rails; cannot replace SF1GDF-13 in 48 V or universal-input designs. | Select only when VOUT ≤ 24 V and ultra-low VF (0.45 V) is prioritized over voltage rating. |
| ES1J-E3/54 | 600 V VRRM, 1 A, 35 ns tRR, but TO-220AC package (higher RθJA = 50°C/W). | Requires heatsink for same current handling; incompatible with space-constrained SMT layouts. | Choose only if board-level thermal management permits larger through-hole footprint and higher profile. |
Compared with SB140-TB and ES1J-E3/54, SF1GDF-13 uniquely balances 400 V capability, 35 ns speed, and D-FLAT SMT compatibility-making it optimal for mid-voltage, high-density consumer and industrial power supplies where thermal, size, and voltage constraints intersect.
Availability
SF1GDF-13 is available at Aetrix Electronics and suitable for USB-C power adapters, LED driver secondary rectification, and industrial DC-DC modules requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for SF1GDF-13 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 SF1x series belongs to Diodes' high-reliability superfast rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in cost-sensitive consumer and industrial applications.
FAQ
What is the maximum junction temperature rating for SF1GDF-13?
The SF1GDF-13 has an operating junction temperature range of –55°C to +150°C. Its thermal resistance values (RθJT = 36°C/W, RθJA = 87°C/W) are measured on specified FR-4 PCB pads, enabling accurate thermal modeling for designs targeting 110°C case temperature under 1.0 A load.
Is SF1GDF-13 compatible with lead-free reflow profiles?
Yes. SF1GDF-13 features a matte tin finish on annealed copper leadframe and is qualified for standard IPC/JEDEC J-STD-020 moisture sensitivity Level 1. It supports peak reflow temperatures up to 260°C and complies with RoHS 3 (2015/863/EU) and halogen-free "Green" requirements (<900 ppm Br/Cl, <1000 ppm Sb).
How does SF1GDF-13 differ from SF1JDF-13 in practical design?
SF1GDF-13 (400 V VRRM) and SF1JDF-13 (600 V VRRM) share identical package, thermal specs, and recovery time-but differ in voltage rating and forward voltage. SF1GDF-13 offers lower VF (1.3 V vs. 1.7 V), improving efficiency in 24–48 V output systems where 400 V blocking suffices.
Can SF1GDF-13 be used in synchronous rectification designs?
SF1GDF-13 serves as a freewheeling or catch diode-not a synchronous rectifier controller. However, its 35 ns tRR and low QRR make it well-suited as a fallback or redundancy diode alongside MOSFET-based synchronous rectifiers in QR flyback or LLC converters, preventing shoot-through during gate drive delays.
SF1GDF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 2-SMD, Flat Leads
- 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:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF1GDF-13 FAQ
1.How can I place an order for SF1GDF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SF1GDF-13 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 SF1GDF-13 reliable?
The price and inventory of SF1GDF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF1GDF-13 is usually 5 days.
3.What payment methods are accepted for SF1GDF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF1GDF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF1GDF-13?
SF1GDF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF1GDF-13 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 SF1GDF-13?
For technical support, including SF1GDF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF1GDF-13 requirements.
6.How does Aetrix verify that SF1GDF-13 is sourced from the original manufacturer or authorized distributors?
All SF1GDF-13 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 SF1GDF-13 meets industry standards.
7.What is the process for return or replacement of SF1GDF-13?
All SF1GDF-13 units undergo pre-shipment inspection (PSI). If there is an issue with SF1GDF-13, 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 SF1GDF-13 part is unused and in its original packaging.
Return procedure for SF1GDF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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