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Diodes Incorporated SK12-13-F
- Part No.:
- SK12-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK12-13-F.pdf
- Description:
- DIODE SCHOTTKY 20V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,287
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Product details
Overview
SK12-13-F from Diodes Incorporated is a surface-mount Schottky barrier rectifier in SMB package, rated for 20 V maximum recurrent peak reverse voltage, 1.0 A average forward rectified current at 75°C, and 0.55 V typical forward voltage at 1.0 A. It serves as a low-loss power conversion diode in DC/DC converter output stages and AC adapter secondary-side rectification.
For engineers reviewing the SK12-13-F datasheet, SK12-13-F pinout, SK12-13-F application, or SK12-13-F equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (25°C/W junction-to-lead), surge current capability (25 A, 8.3 ms), reverse leakage at 100°C (10 mA), and SMB package compatibility with automated SMT assembly.
Technical Context
This Schottky rectifier uses high-temperature metallurgically bonded contacts to achieve low VF and fast switching with no minority-carrier storage delay. Its 110 pF typical junction capacitance at 4.0 V reverse bias and 1.0 MHz enables stable operation in high-frequency switching supplies up to several hundred kHz.
The device operates across –65°C to +125°C junction temperature range and features UL 94V-0 molded plastic case. Thermal resistance of 25°C/W (junction-to-lead) supports direct PCB copper pad heat sinking, and its 265°C solder bath tolerance ensures robust reflow process compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum non-repetitive reverse voltage the diode blocks without breakdown |
| I(AV) | 1.0 A at TA = 75°C - Continuous DC output current capability with 6.0 mm² copper pads |
| VF | 0.55 V at IF = 1.0 A - Low conduction loss enabling >90% efficiency in low-voltage DC/DC outputs |
| IFSM | 25 A, 8.3 ms half-sine - Withstands inrush surges during power-up in offline adapters |
| IR | 10 mA at VR = 20 V, TJ = 100°C - Reverse leakage level affecting standby power in battery-backed systems |
| RθJL | 25°C/W - Junction-to-lead thermal resistance enabling direct thermal path to PCB copper |
| CT | 110 pF at VR = 4.0 V, f = 1.0 MHz - Capacitance influencing EMI filtering and switching node ringing |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case, UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to lower-potential side (e.g., switch node or transformer secondary center-tap) |
| Cathode (K) | Forward current exit point | Marked by cathode band; tied to output rail or ground return path |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.55 V @ 1.0 A reduces conduction loss and improves light-load efficiency |
| High surge current rating | 25 A peak enables reliable operation under transient overloads without failure |
| Low junction capacitance | 110 pF minimizes switching losses and EMI generation in high-frequency converters |
| Robust thermal design | 25°C/W RθJL allows direct heat transfer to PCB copper, eliminating need for heatsinks |
Applications
| AC-DC Adapter Secondary Rectification | DC/DC Converter Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in 5–12 V wall adapters using flyback topology. IC Role / Device Role / Timing Role: Unidirectional current flow control during transformer demagnetization phase. Use Value: 0.55 V VF minimizes voltage drop and thermal rise, enabling compact adapter designs meeting CoC Tier 2 efficiency. | Use Scenario: Output synchronous rectification in buck converters powering FPGA I/O rails. IC Role / Device Role / Timing Role: Freewheeling path during low-side switch off-time. Use Value: Fast recovery and low CT reduce switching node oscillation, improving regulation stability at 500 kHz switching frequency. |
| USB Power Delivery Interface | Industrial Sensor Power Supply |
Use Scenario: Input polarity protection and reverse-current blocking in USB PD sink circuits. IC Role / Device Role / Timing Role: Cathode-connected to VBUS; anode to load to prevent backfeed. Use Value: 20 V VRRM safely handles USB PD 20 V max, while 10 mA IR at 100°C ensures low quiescent current in always-on mode. | Use Scenario: Auxiliary 3.3 V supply rectification in IP67-rated industrial temperature sensors. IC Role / Device Role / Timing Role: Bridge input rectifier in isolated flyback auxiliary winding. Use Value: –65°C to +125°C operating range and 265°C solder tolerance ensure reliability in extended-temperature field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| B120B-13-F | 20 V VRRM, 1.0 A I(AV), 0.45 V VF @ 1.0 A, SMB package | Lower VF improves efficiency in thermally constrained layouts | Select when <0.5 V forward drop is required at full load |
| SS12 | 20 V VRRM, 1.0 A I(AV), 0.5 V VF @ 1.0 A, SMA package | SMA footprint requires PCB redesign; slightly higher RθJA | Choose only if legacy SMA board space is fixed and SMB is unavailable |
Compared with SK12-13-F, B120B-13-F delivers lower conduction loss but shares identical surge and thermal ratings, while SS12 offers similar electrical performance in a smaller, less thermally efficient package-making SK12-13-F optimal for new SMB-based designs requiring balanced VF, surge margin, and thermal management.
Availability
SK12-13-F is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converter output stages, and USB power delivery interface circuits requiring stable component supply and RoHS-compliant lead-free finish.
Supply support for SK12-13-F 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, specializing in high-reliability power management and signal integrity solutions.
The SKxx series targets cost-sensitive, high-volume power rectification applications where low VF, robust surge handling, and SMB manufacturability are prioritized over ultra-low leakage or RF-grade capacitance control.
FAQ
Is SK12-13-F compatible with lead-free reflow processes?
Yes. SK12-13-F features matte tin lead-free plating and is qualified for 265°C solder bath immersion for 10 seconds, fully compliant with IPC/JEDEC J-STD-020C Level 1 moisture sensitivity and standard Pb-free reflow profiles including peak temperatures up to 260°C.
What is the maximum allowable ambient temperature for continuous 1.0 A operation?
At 1.0 A average forward current, the datasheet specifies derating begins above 75°C ambient. With 6.0 mm² copper pads, full 1.0 A load is sustainable up to 75°C; above that, current must be reduced per Fig. 1 - e.g., 0.7 A at 100°C ambient - to maintain TJ ≤ 125°C.
Does SK12-13-F have a specified reverse recovery time (trr)?
No. As a Schottky barrier rectifier, SK12-13-F has no minority carrier storage and therefore no defined reverse recovery time. Its switching behavior is governed by junction capacitance (110 pF) and series resistance, enabling near-zero switching loss in high-frequency applications.
Can SK12-13-F replace SK13-13-F in a design?
No. SK12-13-F is rated for 20 V VRRM, while SK13-13-F is rated for 30 V. Substituting SK12-13-F in a 30 V circuit risks reverse breakdown under transient overvoltage conditions. The "12" and "13" denote distinct voltage grades and are not interchangeable without system-level voltage stress reassessment.
SK12-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 125°C
SK12-13-F FAQ
1.How can I place an order for SK12-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SK12-13-F 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 SK12-13-F reliable?
The price and inventory of SK12-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK12-13-F is usually 5 days.
3.What payment methods are accepted for SK12-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK12-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK12-13-F?
SK12-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK12-13-F 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 SK12-13-F?
For technical support, including SK12-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK12-13-F requirements.
6.How does Aetrix verify that SK12-13-F is sourced from the original manufacturer or authorized distributors?
All SK12-13-F 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 SK12-13-F meets industry standards.
7.What is the process for return or replacement of SK12-13-F?
All SK12-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SK12-13-F, 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 SK12-13-F part is unused and in its original packaging.
Return procedure for SK12-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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