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Semtech Corporation S2KW20C-5P
- Part No.:
- S2KW20C-5P
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S2KW20C-5P.pdf
- Description:
- DIODE GEN PURP 20KV 6A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
S2KW20C-5P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB PD, Type-C VBUS, and load switch inputs in industrial and portable electronics.
For engineers reviewing the S2KW20C-5P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance, DFN-6 package layout constraints, and compatibility with 22V bus architectures requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The S2KW20C-5P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains stable 22V reverse stand-off voltage and <600nA leakage at VRWM, and delivers 1120W peak pulse power. Its 175pF junction capacitance at 22V/1MHz and UL 94V-0 molding compound support compact, high-reliability PCB integration near connectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers, load switches) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) for industrial equipment and USB PD input protection. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - provides system-level ESD robustness without external shielding or layout mitigation. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for VBUS line protection without signal integrity impact on DC or low-frequency power paths. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection of all three pins ensures uniform current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping across current range | 27.5–28V from 24A to 40A - eliminates design margin inflation required with traditional TVS diodes whose VC rises linearly with IPP. |
| Temperature-stable clamping | Clamping voltage unchanged from –40°C to +125°C - enables reliable protection in automotive cabin, industrial enclosures, and high-power USB PD adapters. |
| Low dynamic resistance | 20mΩ - reduces IR drop during surge, enabling tighter voltage control and higher survivability for sensitive downstream FETs or controllers. |
| High-energy surge capability | 1120W peak pulse power - supports repeated lightning-induced surges in remote meters, IoT gateways, and USB-powered industrial peripherals. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C ports supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller/load switch, clamping surges before they reach silicon. Use Value: Maintains 27.5–28V clamping across temperature and current-prevents false overvoltage shutdown and avoids derating needed with TVS diodes. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in programmable logic controllers and smart sensors. IC Role / Device Role / Timing Role: Primary EOS barrier against induced surges on 24V supply rails in factory automation and remote metering. Use Value: Prevents latch-up or gate oxide damage in load switch internal FETs by limiting transient voltage to ≤28V regardless of ambient temperature. |
| IoT Edge Device Power Bus Protection | Notebook/Tablet VBUS Line Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed gateways exposed to ESD during field servicing or lightning-coupled surges. IC Role / Device Role / Timing Role: Standalone surge diverter on main DC input rail, coordinated with upstream e-fuse and downstream DC-DC converter. Use Value: 175pF capacitance avoids filtering issues on 22V rails; 1.6×1.6mm footprint saves space vs. discrete TVS+RC solutions. |
Use Scenario: Protecting USB-C receptacle VBUS in thin client devices where thermal and board area constraints limit heatsinking options. IC Role / Device Role / Timing Role: First-line defense against ESD events during hot-plug insertion and conducted surges from shared AC adapters. Use Value: ±30kV ESD rating eliminates need for secondary board-level shielding; stable clamping prevents brownout resets during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package; same Semtech product family and revision history - confirmed direct replacement per Semtech documentation. | Same use cases: USB PD, load switch, industrial 22V bus protection. | Select S2KW20C-5P for Aetrix-sourced traceability and volume procurement support; TDS2211P is manufacturer's original orderable part number. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 33V clamping at 20A, and 0.25pF capacitance optimized for CC/SBU lines-not rated for 40A VBUS protection. | Designed for low-capacitance data line protection (CC, SBU), not power rail clamping. | Not interchangeable for VBUS applications; only suitable where lower surge energy and sub-pF capacitance are prioritized over power-line robustness. |
Compared with TDS2211P, S2KW20C-5P is a functionally identical, fully compatible variant with identical datasheet parameters and mechanical form; compared with uClamp2411ZA, it delivers 2× peak current handling and 5V lower clamping-making it appropriate for high-energy power-line protection where uClamp2411ZA is limited to signal-line roles.
Availability
S2KW20C-5P is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge device power buses requiring stable component supply, consistent parametric performance, and long-term lifecycle availability.
Supply support for S2KW20C-5P 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The S2KW20C-5P belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection with superior clamping stability and surge endurance.
FAQ
What is the maximum continuous operating voltage for S2KW20C-5P?
The S2KW20C-5P has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage current. This makes it suitable for 20V USB PD VBUS and 24V industrial power rails where nominal voltage stays within this limit. Exceeding 22V risks premature conduction and accelerated degradation.
Does S2KW20C-5P require a thermal pad on the PCB?
No, the S2KW20C-5P does not require a thermal pad. Its energy dissipation occurs during transient events-not steady-state-and the DFN package relies on low-inductance GND connections (pins 1–3) and short traces to ground for effective surge current routing. Semtech explicitly states no thermal pad is needed, as heat is not localized in a junction but distributed via the FET channel during clamping.
Can S2KW20C-5P be used on high-speed data lines like USB SuperSpeed?
No, the S2KW20C-5P is not suitable for USB SuperSpeed (TX/RX) or other high-speed differential data lines. Its 175pF junction capacitance would severely degrade signal integrity. It is intended exclusively for power or low-frequency I/O lines such as VBUS, CC, or load switch enable inputs. For SuperSpeed lines, Semtech recommends RClamp3371ZC (<0.25pF).
How does S2KW20C-5P differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes-whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN)-the S2KW20C-5P uses a triggered FET architecture that maintains clamping at 27.5–28V from 24A to 40A. This flat response eliminates design uncertainty caused by temperature- and current-dependent VC drift in traditional TVS devices.
Is S2KW20C-5P pin-compatible with TDS2211P?
Yes, S2KW20C-5P is pin-compatible and electrically identical to TDS2211P: both use the same DFN-6 (1.6×1.6mm) package with identical pin 1–3 (GND) and pin 4–6 (IN) configuration, matching absolute maximum ratings, clamping performance, and thermal specifications. Semtech documentation confirms functional and mechanical equivalence.
S2KW20C-5P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 20000 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 20 V @ 6 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 2 µA @ 20000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KW20C-5P FAQ
1.How can I place an order for S2KW20C-5P through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KW20C-5P 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 S2KW20C-5P reliable?
The price and inventory of S2KW20C-5P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KW20C-5P is usually 5 days.
3.What payment methods are accepted for S2KW20C-5P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KW20C-5P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KW20C-5P?
S2KW20C-5P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KW20C-5P 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 S2KW20C-5P?
For technical support, including S2KW20C-5P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KW20C-5P requirements.
6.How does Aetrix verify that S2KW20C-5P is sourced from the original manufacturer or authorized distributors?
All S2KW20C-5P 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 S2KW20C-5P meets industry standards.
7.What is the process for return or replacement of S2KW20C-5P?
All S2KW20C-5P units undergo pre-shipment inspection (PSI). If there is an issue with S2KW20C-5P, 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 S2KW20C-5P part is unused and in its original packaging.
Return procedure for S2KW20C-5P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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