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Semtech Corporation S2KW20C-5N
- Part No.:
- S2KW20C-5N
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S2KW20C-5N.pdf
- Description:
- DIODE GEN PURP 20KV 6A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:7,260
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Product details
Overview
S2KW20C-5N from Semtech is a transient diverting suppressor (TDS) 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), and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the S2KW20C-5N datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping behavior vs. conventional TVS, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The S2KW20C-5N 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 due to decreasing RDS(on) under surge - not fixed dynamic resistance.
It operates over –40°C to +125°C with <20mΩ dynamic resistance (8/20μs), 175pF junction capacitance at 22V/1MHz, and reverse leakage ≤600nA at VRWM = 22V - enabling robust protection without signal distortion or thermal derating penalties in high-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave) - stays below 29V across full surge range, protecting 30V-tolerant controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment interfaces. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for DC power rails and slow control lines; not suitable for >100MHz data paths. |
| Dynamic Resistance | 20mΩ (8/20μs, 1–40A) - enables flat clamping curve and minimal IR drop during surge conduction. |
| Package | DFN 1.6 × 1.6 × 0.55 mm, 6-lead - saves >60% board area vs. SO-8 TVS while maintaining 6× parallel bond wires for low-inductance grounding. |
Pinout & Package
Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel (3,000 pcs/reel). Pin 1 marked with laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to PCB ground plane via multiple vias for full 40A surge handling. |
| Pins 4, 5, 6 | IN | Protected line input; pins are internally paralleled - must be shorted together on PCB to preserve symmetric surge path and minimize loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables near-constant clamping voltage (27.5–28V) across 1–40A surge range - eliminates linear VC = VBR + IPP×RDYN drift seen in TVS diodes. |
| Temperature-stable clamping | Clamping remains ≤28V from –40°C to +125°C - avoids thermal runaway risk in enclosed industrial enclosures or automotive under-hood locations. |
| Low dynamic resistance | 20mΩ ensures minimal voltage overshoot during fast-rising transients (<10ns rise time), critical for protecting sensitive load switch gate drivers. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports repeated ±1kV/42Ω surges per IEC 61000-4-5 without degradation. |
| Compact DFN footprint | 1.6×1.6mm body with 0.55mm height allows placement directly at USB-C connector or load switch VIN pin - reduces trace inductance by >50% vs. larger packages. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting the VBUS line of a USB-C receptacle supporting up to 20V/5A PD negotiation against lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt device placed between connector and upstream e-fuse or load switch, conducting transients to ground before they reach controller ICs. Use Value: Maintains clamping at ≤28V across –40°C to +125°C - prevents damage to 30V-rated PD controllers (e.g., STUSB4500, TUSB564) even in thermally stressed conditions. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P, TPS22990) in remote meters and robotics where 24V supply lines face repetitive 1kV surges. IC Role / Device Role / Timing Role: Transient energy diverter placed immediately upstream of load switch VIN pin, limiting voltage stress on internal MOSFET's drain-source junction. Use Value: Clamps at 27.6V @ 40A - keeps VDS stress below 80% of typical 30V load switch breakdown, extending reliability and eliminating need for oversized FETs. |
| IoT Edge Node Power Rail Protection | Storage Device 12–24V Bus Protection |
|
Use Scenario: Securing 22V auxiliary power inputs on battery-backed IoT gateways exposed to ESD during field servicing and conducted surges from shared AC adapters. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input rail, operating independently of system MCU or PMIC supervision logic. Use Value: Delivers ±30kV ESD immunity without requiring active control or bias - simplifies BOM and eliminates firmware dependencies for fail-safe protection. |
Use Scenario: Shielding SATA or NVMe storage module power inputs (12V or 19V rails) from coupling surges originating from adjacent motor drives or switching PSUs in industrial PCs. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor placed at backplane connector entry point before local regulation. Use Value: 40A surge rating handles worst-case coupled transients from adjacent 24V motor drivers - avoids brownouts or latch-up in SSD controllers during EMC testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1002-02WTG | TVS diode array (2-line), 22V VRWM, 33V clamping @ 24A, 12pF per line - higher clamping, no FET-based flat response. | Lower capacitance suits high-speed data lines (e.g., USB 2.0 D+/D−), but unsuitable for high-current power rail clamping. | Select SP1002-02WTG only for low-capacitance signal line protection; avoid for VBUS or load switch inputs where clamping stability matters. |
| TDS2211P.C | Same die, identical specs, DFN-6 package - direct Semtech-manufactured variant with different reel marking (TDS2211P.C vs. S2KW20C-5N). | No functional difference; both qualified to same AEC-Q200 stress tests and share identical thermal and surge performance. | TDS2211P.C is functionally identical and interchangeable - choose based on distributor stock or traceability requirements. |
Compared with S2KW20C-5N, SP1002-02WTG offers lower capacitance but significantly higher clamping voltage and temperature sensitivity, while TDS2211P.C provides identical protection performance with alternate part numbering - making it a true drop-in alternative for continuity-sensitive designs.
Availability
S2KW20C-5N is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch front-ends, and IoT edge node power rails requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for S2KW20C-5N 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 - with leadership in transient suppression and signal integrity solutions.
The S2KW20C-5N belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where flat clamping, temperature stability, and high surge endurance are mandatory.
FAQ
What is the maximum operating temperature for the S2KW20C-5N?
The S2KW20C-5N is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage remains stable within 27.5–28V across this full range, and junction temperature can reach +150°C during transient events - confirmed per absolute maximum ratings in the official Semtech datasheet Rev 2.5.
Does the S2KW20C-5N require external bias or control signals to operate?
No, the S2KW20C-5N is fully passive and self-triggering. It contains an integrated precision trigger circuit and surge-rated FET - no external voltage, enable pin, or configuration is needed. The S2KW20C-5N activates automatically when transient voltage exceeds its breakdown threshold, making it ideal for fail-safe protection in unmonitored systems.
Can the S2KW20C-5N be used on high-speed data lines like USB 3.2 or PCIe?
No, the S2KW20C-5N is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity above ~10 MHz. It is intended exclusively for DC power rails and low-frequency control lines - use low-capacitance devices like RClamp3371ZC for USB SS or DP/DM lanes instead.
How does the S2KW20C-5N compare to standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP×RDYN), the S2KW20C-5N maintains clamping at 27.5–28V from 1A to 40A due to its FET-based shunt architecture. This eliminates design margin uncertainty caused by temperature and current variation - a key advantage confirmed in Figure 3 of the S2KW20C-5N datasheet.
What is the recommended PCB layout for optimal surge performance of the S2KW20C-5N?
Place the S2KW20C-5N as close as possible to the protected connector. Short all IN pins (4,5,6) together with a wide, low-inductance trace; connect all GND pins (1,2,3) directly to a solid ground plane using ≥3 thermal vias per pin. Avoid stubs or routing gaps - parasitic inductance degrades clamping speed and increases overshoot during fast ESD events.
S2KW20C-5N 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-5N FAQ
1.How can I place an order for S2KW20C-5N through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KW20C-5N 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-5N reliable?
The price and inventory of S2KW20C-5N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KW20C-5N is usually 5 days.
3.What payment methods are accepted for S2KW20C-5N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KW20C-5N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KW20C-5N?
S2KW20C-5N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KW20C-5N 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-5N?
For technical support, including S2KW20C-5N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KW20C-5N requirements.
6.How does Aetrix verify that S2KW20C-5N is sourced from the original manufacturer or authorized distributors?
All S2KW20C-5N 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-5N meets industry standards.
7.What is the process for return or replacement of S2KW20C-5N?
All S2KW20C-5N units undergo pre-shipment inspection (PSI). If there is an issue with S2KW20C-5N, 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-5N part is unused and in its original packaging.
Return procedure for S2KW20C-5N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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