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Taiwan Semiconductor Corporation SSL12
- Part No.:
- SSL12
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SSL12.pdf
- Description:
- DIODE SCHOTTKY 20V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:14,909
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Product details
Overview
SSL12 from Taiwan Semiconductor is a 1 A, 20 V repetitive peak reverse voltage Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, featuring 0.39 V max forward voltage at 1 A and 50 A peak surge current, used in switching mode power supplies and DC/DC converters.
For engineers reviewing the SSL12 datasheet, SSL12 pinout, SSL12 application, or SSL12 equivalent, key selection criteria include its 20 V VRRM, 1 A continuous forward current rating, low 0.39 V forward drop, 28 °C/W junction-to-lead thermal resistance, and DO-214AC polarity marking with cathode band.
Technical Context
This single-die Schottky rectifier operates with a maximum junction temperature of 125 °C and supports surge currents up to 50 A for 8.3 ms half-sine pulses. Its guard ring structure provides overvoltage protection, and moisture sensitivity level is rated J-STD-020 Level 1.
Electrical behavior is characterized by 200 µA max reverse leakage at 25 °C and 50 mA at 100 °C under rated reverse voltage, with junction capacitance measured at 1.0 MHz and 50 mVp-p signal amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage before breakdown |
| IF | 1 A - Continuous average forward current capability at 75 °C case temperature |
| IFSM | 50 A - Non-repetitive peak forward surge current (8.3 ms half-sine) |
| VF (max) | 0.39 V - Forward voltage drop at 1 A, 25 °C, directly impacting conduction loss in SMPS |
| RθJL | 28 °C/W - Junction-to-lead thermal resistance, critical for heatsinking in high-density layouts |
| TJ (max) | 125 °C - Maximum allowable junction temperature for reliable long-term operation |
Pinout & Package
DO-214AC (SMA) surface-mount package with molded plastic body, matte tin-plated leads, cathode indicated by a visible band on the body, and polarity-aligned lead configuration for automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; requires PCB pad layout per JEDEC DO-214AC footprint |
| Cathode | Forward current exit / reverse voltage blocking terminal | Marked by band; ties to higher-potential node; determines direction of rectification in bridge or freewheeling paths |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers |
| Low forward voltage (0.39 V max) | Reduces conduction losses in high-frequency switching topologies like flyback and buck converters |
| J-STD-020 Level 1 moisture sensitivity | Enables standard SMT reflow without dry-pack or baking requirements |
| RoHS and halogen-free compliance | Meets environmental regulations for consumer electronics and industrial equipment shipments |
Applications
| SMPS Primary-Side Freewheeling | USB-C PD Adapter Output Rectification |
|---|---|
Use Scenario: High-frequency flyback converter output stage delivering 5–20 V at up to 1 A. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during MOSFET off-time. Use Value: 0.39 V VF minimizes conduction loss, improving efficiency over silicon diodes by >2% at full load. | Use Scenario: Secondary-side synchronous rectification replacement in compact USB-C power adapters. IC Role / Device Role / Timing Role: Discrete Schottky rectifier replacing active sync-FET control in cost-sensitive designs. Use Value: Enables simplified layout with no gate drive circuitry while maintaining <150 mW dissipation at 1 A. |
| Monitor Power Supply Input Stage | TV Backlight DC/DC Converter |
Use Scenario: AC/DC front-end rectification feeding PFC and main DC bus in LCD monitor power boards. IC Role / Device Role / Timing Role: Input rectifier handling 1 A continuous current after bulk filtering. Use Value: 50 A IFSM withstands inrush surges from cold-start capacitors without degradation. | Use Scenario: Boost converter output rectification supplying 30–60 V to LED strings in flat-panel TV backlight units. IC Role / Device Role / Timing Role: High-reliability output diode operating at elevated ambient temperatures near heat-generating LEDs. Use Value: 125 °C TJ(max) and 28 °C/W RθJL ensure stable operation at board temperatures up to 95 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS12 (ON Semiconductor) | Same 20 V VRRM, 1 A IF, but 0.52 V max VF at 1 A and 40 A IFSM | Higher forward loss reduces efficiency in thermally constrained adapters | Prefer SSL12 where <0.4 V VF and 50 A surge margin are required |
| SB120 (Vishay) | 20 V VRRM, 1 A IF, 0.45 V max VF, DO-214AC, but J-STD-020 Level 2 moisture sensitivity | Requires dry-pack storage and bake prior to reflow in humid environments | Choose SSL12 for streamlined manufacturing with Level 1 handling and lower VF |
Compared with SS12 and SB120, SSL12 delivers the lowest forward voltage (0.39 V) and highest surge rating (50 A) in the 20 V/1 A Schottky class, with Level 1 moisture sensitivity enabling direct placement without process overhead.
Availability
SSL12 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C adapters, and flat-panel display power systems requiring stable component supply and consistent parametric performance across production lots.
Supply support for SSL12 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power and protection device markets since 1979.
The SSL12 belongs to TSC's SMA-packaged Schottky rectifier product line, engineered specifically for high-efficiency, space-constrained AC/DC and DC/DC conversion in consumer and industrial power supplies.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SSL12?
The SSL12 has a maximum repetitive peak reverse voltage (VRRM) of 20 V, as specified in the Absolute Maximum Ratings table. This value is fixed for SSL12 and distinct from SSL13 (30 V) and SSL14 (40 V). Exceeding 20 V in continuous reverse bias risks irreversible breakdown. The SSL12 datasheet confirms this rating applies under standard test conditions at TA = 25 °C.
Does SSL12 have a cathode marking, and how is polarity identified?
Yes, SSL12 uses a visible cathode band on the molded plastic body to indicate polarity, per DO-214AC mechanical specifications. The banded end corresponds to the cathode terminal, and the unmarked end is the anode. This marking aligns with JEDEC standards and ensures correct orientation during automated placement and manual inspection. The SSL12 marking code "SL12" appears adjacent to the band.
What is the forward voltage (VF) of SSL12 at 1 A and 25 °C?
The SSL12 exhibits a maximum forward voltage (VF) of 0.39 V when conducting 1 A at junction temperature 25 °C, as stated in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. At higher temperatures or currents, VF decreases slightly due to the negative temperature coefficient of Schottky diodes.
Is SSL12 suitable for reflow soldering without moisture preconditioning?
Yes, SSL12 is rated J-STD-020 Moisture Sensitivity Level 1, meaning it may be subjected to standard Pb-free reflow profiles (e.g., JEDEC J-STD-020D) without prior dry-pack storage or baking. This eliminates handling overhead in high-volume SMT lines. The SSL12 qualification report confirms Level 1 status applies to the DO-214AC package variant shipped in tape-and-reel format.
What is the peak forward surge current (IFSM) rating for SSL12?
The SSL12 is rated for a non-repetitive peak forward surge current (IFSM) of 50 A under an 8.3 ms single half-sine wave condition, as defined in the Absolute Maximum Ratings table. This rating enables robust inrush current handling in power supply input stages. The SSL12 maintains this rating across its full operating temperature range, verified per JEDEC JESD22-A112A test methodology.
SSL12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 390 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SSL12 FAQ
1.How can I place an order for SSL12 through Aetrix?
Please submit a Request for Quotation (RFQ) for SSL12 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 SSL12 reliable?
The price and inventory of SSL12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL12 is usually 5 days.
3.What payment methods are accepted for SSL12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSL12?
SSL12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSL12 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 SSL12?
For technical support, including SSL12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL12 requirements.
6.How does Aetrix verify that SSL12 is sourced from the original manufacturer or authorized distributors?
All SSL12 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 SSL12 meets industry standards.
7.What is the process for return or replacement of SSL12?
All SSL12 units undergo pre-shipment inspection (PSI). If there is an issue with SSL12, 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 SSL12 part is unused and in its original packaging.
Return procedure for SSL12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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