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Taiwan Semiconductor Corporation SSL32
- Part No.:
- SSL32
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SSL32.pdf
- Description:
- DIODE SCHOTTKY 20V 3A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,561
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Product details
Overview
SSL32 from Taiwan Semiconductor is a 3A, 20V repetitive peak reverse voltage Schottky barrier rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching mode power supplies, adapters, and DC-DC converters with low forward voltage drop (0.41 V max at 3 A, 25°C) and 100 A surge capability.
For engineers reviewing the SSL32 datasheet, SSL32 pinout, SSL32 application, or SSL32 equivalent, key selection criteria include its 20 V VRRM, 3 A continuous forward current rating, 0.41 V forward voltage at rated load, 13 °C/W junction-to-lead thermal resistance, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
The SSL32 is a single-die, unidirectional Schottky rectifier with cathode band polarity indication and guard ring structure for overvoltage protection. It operates across –55°C to +125°C junction temperature range and supports 8.3 ms half-sine surge events up to 100 A.
Thermal performance is characterized on a 16 mm × 16 mm copper pad PCB: RθJL = 13 °C/W, RθJC = 15 °C/W, and RθJA = 53 °C/W. Reverse leakage is 200 µA max at 25°C and 50 mA max at 100°C under rated 20 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback or buck converter freewheeling paths |
| IF | 3 A - Continuous average forward current; determines steady-state power handling in SMPS output rectification |
| IFSM | 100 A - Peak non-repetitive surge current (8.3 ms); supports inrush and transient overload tolerance |
| VF | 0.41 V max @ 3 A, 25°C - Low conduction loss enabling >90% efficiency in 5–24 V output rails |
| TJ max | +125°C - Maximum junction temperature; sets thermal derating envelope for PCB layout and heatsinking |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB copper for passive cooling |
Pinout & Package
DO-214AB (SMC) surface-mount package with molded plastic body (UL 94V-0), matte tin-plated leads, and cathode band polarity marking. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/high-side node in buck/flyback secondary; requires low-inductance trace routing |
| Cathode | Forward current exit point | Connected to output/common rail; marked by visible band; carries full load current to ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage spikes without external clamping components |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard J-STD-020 assembly flow |
| High surge current capability (100 A) | Withstands repeated line transients and capacitor-charging surges in AC/DC adapters |
| RoHS & halogen-free compliance | Meets IPC-1752A material declaration requirements for industrial and consumer end equipment |
Applications
| AC/DC Adapter Output Rectification | USB PD Fast-Charging Converter |
|---|---|
Use Scenario: Secondary-side rectification in 20–65 W wall adapters powering laptops and monitors. IC Role / Device Role / Timing Role: Schottky rectifier replacing slower diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.41 V VF minimizes power dissipation at 3 A output, enabling compact thermal design without heatsinks. | Use Scenario: 20 V output stage in programmable USB Power Delivery (PPS) converters. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectifier-assisted topology, handling reverse recovery during gate drive transitions. Use Value: 20 V VRRM matches nominal 20 V PPS profile while maintaining margin against overshoot during dynamic load steps. |
| LED Driver Secondary Rectification | Industrial DC-DC Buck Converter |
Use Scenario: Constant-current LED driver output stage for streetlight or high-bay fixtures. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback topology delivering 24–48 V DC to LED strings. Use Value: 100 A IFSM withstands lamp hot-swap surges; low VF preserves driver efficiency across dimming range. | Use Scenario: 24 V input to 5 V/3.3 V point-of-load conversion in PLC and HMI modules. IC Role / Device Role / Timing Role: Catch diode in non-synchronous buck regulator where MOSFET replacement is cost-prohibited. Use Value: DO-214AB footprint allows drop-in replacement of legacy rectifiers; 13 °C/W RθJL supports >2 W dissipation on standard 2 oz Cu. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS32 (ON Semiconductor) | Same 20 V VRRM, 3 A IF, DO-214AB package; VF = 0.52 V max (higher conduction loss) | Slightly lower efficiency in high-duty-cycle operation; identical thermal footprint | Prefer SSL32 when <0.45 V VF is required for thermal budget control |
| SB320 (Vishay) | 20 V VRRM, 3 A IF, DO-214AA (SMB) package; smaller body, higher RθJA (65 °C/W) | Limited surge margin due to lower thermal mass; not suitable for high-peak-current adapters | Choose SSL32 for designs requiring 100 A IFSM and robust PCB-level thermal coupling |
Compared with SS32 and SB320, the SSL32 delivers superior forward voltage (0.41 V vs. 0.52 V/0.48 V), higher surge rating (100 A vs. 80 A/75 A), and lower junction-to-lead resistance (13 °C/W vs. 18 °C/W/22 °C/W), making it optimal for thermally constrained, high-reliability adapter and converter designs.
Availability
SSL32 is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SSL32 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 management and industrial markets since 1979.
The SSL32 belongs to TSC's Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in cost-sensitive, high-volume power conversion systems.
FAQ
What is the maximum repetitive peak reverse voltage rating for SSL32?
The SSL32 has a maximum repetitive peak reverse voltage (VRRM) of 20 V, verified per Taiwan Semiconductor's K2310 datasheet revision. This rating defines the highest reverse-biased voltage the device can block continuously without breakdown. Exceeding 20 V risks irreversible avalanche failure. The SSL32 is part of a family where SSL33 and SSL34 offer 30 V and 40 V ratings respectively.
Does SSL32 support automated SMT placement, and what is its moisture sensitivity level?
Yes, SSL32 is qualified for automated surface-mount placement per its DO-214AB (SMC) package and matte tin-plated leads. Its moisture sensitivity level is Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking prior to reflow soldering - a key advantage for high-throughput manufacturing lines.
What is the forward voltage of SSL32 at its rated 3 A current?
The SSL32 exhibits a maximum forward voltage (VF) of 0.41 V at 3 A forward current and 25°C junction temperature, measured under pulsed conditions (0.3 ms pulse width). This low VF directly reduces conduction losses in power supplies, improving overall system efficiency and easing thermal management compared to standard PN diodes.
How does the thermal resistance of SSL32 impact PCB layout decisions?
The SSL32's junction-to-lead thermal resistance (RθJL) is 13 °C/W, indicating efficient heat transfer from die to lead frame. To realize this value, the PCB must use a minimum 16 mm × 16 mm copper pad per lead - as specified in the thermal test condition. Reducing pad area increases effective RθJA, risking junction overheating above 125°C under full 3 A load.
Is SSL32 suitable for use in automotive applications?
No - Taiwan Semiconductor explicitly states that SSL32 is not designed for medical, life-saving, or life-sustaining applications, and no AEC-Q200 qualification or automotive-grade reliability data is provided for SSL32. For automotive use, designers must select components with documented AEC-Q200 stress test results and extended temperature grading (e.g., –40°C to +150°C).
SSL32 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- -
- 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-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SSL32 FAQ
1.How can I place an order for SSL32 through Aetrix?
Please submit a Request for Quotation (RFQ) for SSL32 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 SSL32 reliable?
The price and inventory of SSL32 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL32 is usually 5 days.
3.What payment methods are accepted for SSL32?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL32 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSL32?
SSL32 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSL32 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 SSL32?
For technical support, including SSL32 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL32 requirements.
6.How does Aetrix verify that SSL32 is sourced from the original manufacturer or authorized distributors?
All SSL32 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 SSL32 meets industry standards.
7.What is the process for return or replacement of SSL32?
All SSL32 units undergo pre-shipment inspection (PSI). If there is an issue with SSL32, 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 SSL32 part is unused and in its original packaging.
Return procedure for SSL32:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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