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Semtech Corporation S2KW16C-4D
- Part No.:
- S2KW16C-4D
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S2KW16C-4D.pdf
- Description:
- DIODE GEN PURP 16KV 3A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:2,253
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Product details
Overview
S2KW16C-4D 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), 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6×0.55mm 6-lead package. It protects USB Type-C power delivery buses and industrial load switch inputs.
For engineers reviewing the S2KW16C-4D datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature, dynamic resistance ≤20mΩ, junction capacitance of 175pF at 22V, and compatibility with 22V working voltage systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The S2KW16C-4D 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 and across −40°C to +125°C due to decreasing RDS(on) under surge.
It operates with three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3), requiring all six pins to be connected for full 40A rating. Its solid-state architecture avoids junction heating limitations, enabling stable performance in high-temperature industrial and USB PD environments without thermal pad requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds standard USB interface ESD requirements by >2×. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping curve and low voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with moderate-speed power/data lines (e.g., VBUS, load switch inputs), not high-speed signal lines. |
| Operating Temp | −40°C to +125°C - supports deployment in automotive-adjacent industrial and embedded equipment without derating. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, marked "T22" + date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to minimize inductance and achieve full 40A rating. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals tied to protected line (e.g., VBUS); all three required for rated clamping performance and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across 24–40A and −40°C to +125°C - eliminates need for over-spec'ing IPP to meet voltage margin at high temp. |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during fast-rising surges and improves energy diversion efficiency vs. TVS diodes. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive burst noise in motor drives and industrial comms. |
| Small-footprint DFN | 1.6×1.6mm - saves >60% board area vs. SO-8 or SOT-23 TVS solutions while maintaining 1120W peak power capability. |
| No thermal pad required | Dissipates surge energy in FET channel, not PN junction - simplifies PCB layout and eliminates thermal via design constraints. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed at connector entry point, clamping transients before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature-unlike TVS diodes whose clamping rises to >38V at 125°C-ensuring reliable controller survival. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subject to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on the load switch's internal FET during EOS events. Use Value: Prevents gate oxide damage and latch-up in downstream switches by holding clamping voltage well below their absolute max ratings (typically <30V). |
| IoT Device Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and edge nodes deployed in electrically noisy factory environments. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on non-high-speed power paths. Use Value: Eliminates need for multi-stage protection (TVS + MOV + filter) while delivering superior clamping consistency and footprint reduction. |
Use Scenario: Shielding 22V supply inputs of NVMe SSD enclosures and enterprise storage controllers from hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: High-reliability transient suppressor integrated directly at board-edge connector for VCC rail integrity. Use Value: Enables compliance with IEC 61000-4-5 Level 4 without sacrificing PCB real estate or adding thermal management complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN 1.6×1.6mm package, identical pinout and marking ("T22"), same 3000/reel tape-and-reel packaging. | No functional difference; TDS2211P.C is Semtech's official orderable part number for this device. | Select TDS2211P.C when sourcing directly from Semtech or authorized distributors using official part nomenclature. |
| SP1003-02HTG | 22V working voltage, ±30kV ESD, but 20A IPP (8/20μs), 33V clamping at 20A, SOD-323 package - higher clamping, lower surge rating, smaller footprint. | Suitable only for lower-energy interfaces (e.g., CC/SBU lines), not VBUS or load switch inputs requiring 40A handling. | Choose SP1003-02HTG only for space-constrained, lower-surge applications where 20A rating suffices and 33V clamping is acceptable. |
Compared with S2KW16C-4D, TDS2211P.C is functionally identical and interchangeable, while SP1003-02HTG offers reduced surge capacity and higher clamping-making it unsuitable as a direct replacement for 40A/22V bus protection but viable for auxiliary signal-line protection.
Availability
S2KW16C-4D is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V power bus protection requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature.
Supply support for S2KW16C-4D 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 in industrial, communications, and consumer markets.
The TDS family-including S2KW16C-4D-is engineered specifically for high-energy EOS protection of 12–36V power and data lines, replacing traditional TVS diodes with FET-based clamping for stable voltage limiting across current and temperature.
FAQ
What is the exact package type and dimensions of the S2KW16C-4D?
The S2KW16C-4D uses a DFN (Dual Flat No-lead) package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads. Pin 1 is marked by a laser dot; pins 1–3 are GND, and pins 4–6 are IN. The package is Pb-free, RoHS-compliant, and carries UL 94V-0 flammability rating. Its compact size enables high-density layout in space-constrained USB-C and IoT designs.
Does the S2KW16C-4D require a thermal pad or heatsink for 40A surge operation?
No, the S2KW16C-4D does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy in the channel rather than the junction, eliminating thermal pad dependency. Layout best practice is to connect all three GND pins (1–3) and all three IN pins (4–6) with low-inductance traces and multiple vias to the ground plane-no thermal copper is needed beneath the device body.
How does the clamping voltage of the S2KW16C-4D compare to standard TVS diodes at elevated temperature?
At 125°C, the S2KW16C-4D maintains clamping voltage between 27.5V and 28V across its full 40A rating, whereas a typical 22V TVS diode clamps at ~38V under identical conditions. This stability arises from the FET's decreasing RDS(on) during surge, unlike fixed RDYN in TVS devices. As a result, S2KW16C-4D provides predictable, temperature-invariant protection for USB PD controllers and load switches.
Can the S2KW16C-4D be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the S2KW16C-4D is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V is too high for USB 3.x (requires <0.3pF) or PCIe Gen3+ signaling. It is intended exclusively for power rails (VBUS, load switch inputs) and moderate-speed control lines. For data line protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) alongside S2KW16C-4D in complete USB-C solutions.
What IEC standards does the S2KW16C-4D meet, and at what test levels?
The S2KW16C-4D meets IEC 61000-4-2 Level 4 (±30kV contact/air), IEC 61000-4-4 Level 4 (±4kV EFT), and IEC 61000-4-5 Level 4 (±1kV, 1.2/50μs voltage + 8/20μs current, RS=42Ω). Its 40A rating at 8/20μs also satisfies IEC 61000-4-5 Level 4 for 22V systems. All specifications are validated per Semtech's TDS2211P datasheet Rev 2.5.
S2KW16C-4D 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):
- 16000 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 16 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 2 µA @ 16000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KW16C-4D FAQ
1.How can I place an order for S2KW16C-4D through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KW16C-4D 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 S2KW16C-4D reliable?
The price and inventory of S2KW16C-4D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KW16C-4D is usually 5 days.
3.What payment methods are accepted for S2KW16C-4D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KW16C-4D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KW16C-4D?
S2KW16C-4D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KW16C-4D 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 S2KW16C-4D?
For technical support, including S2KW16C-4D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KW16C-4D requirements.
6.How does Aetrix verify that S2KW16C-4D is sourced from the original manufacturer or authorized distributors?
All S2KW16C-4D 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 S2KW16C-4D meets industry standards.
7.What is the process for return or replacement of S2KW16C-4D?
All S2KW16C-4D units undergo pre-shipment inspection (PSI). If there is an issue with S2KW16C-4D, 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 S2KW16C-4D part is unused and in its original packaging.
Return procedure for S2KW16C-4D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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