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Semtech Corporation S2KW12C-3N
- Part No.:
- S2KW12C-3N
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S2KW12C-3N.pdf
- Description:
- DIODE GEN PURP 12KV 2A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:9,165
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Product details
Overview
S2KW12C-3N 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 20mΩ dynamic resistance. It protects USB PD and Type-C VBus lines in industrial and portable equipment.
For engineers reviewing the S2KW12C-3N datasheet, pinout, applications, or equivalent options, this device delivers stable clamping across temperature and current-critical for load switch input protection, USB Type-C bus safeguarding, and industrial surge compliance where conventional TVS diodes exhibit rising VC with IPP or temperature.
Technical Context
The S2KW12C-3N 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 standard 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 <600nA reverse leakage at 22V, and exhibits only 175pF junction capacitance at 22V/1MHz-enabling use in high-speed power rails without signal integrity degradation. Its DFN package integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) to minimize parasitic inductance during 40A transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - Matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - Remains stable across full rated current and temperature range, unlike TVS diodes. |
| Peak Pulse Current | 40A (8/20μs) - Meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Exceeds automotive and industrial ESD requirements. |
| Dynamic Resistance | 20mΩ - Enables low-voltage overshoot during fast transients, reducing stress on downstream ICs. |
| Junction Capacitance | 175pF at 22V/1MHz - Low enough to avoid degrading rise/fall times on 20V power rails. |
| Reverse Leakage | ≤600nA at 22V - Minimizes standby power loss in battery-backed or energy-sensitive systems. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Three parallel ground terminals-must all be connected to low-inductance ground plane to sustain 40A surge current. |
| Pins 4, 5, 6 | IN | Three parallel input terminals-connect directly to protected line (e.g., USB PD VBus); all must be routed together to minimize loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C-eliminates design margin uncertainty vs. TVS diodes. |
| Surge-rated FET protection element | Replaces PN-junction TVS with sub-0.1Ω RDS(on) shunt-dissipates energy in channel rather than junction, improving thermal robustness. |
| Low dynamic resistance | 20mΩ enables <0.8V additional overshoot beyond VBR during 40A surge-reducing risk of MOSFET gate oxide failure in load switches. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz)-protects against repetitive burst noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A power delivery in notebooks and docking stations. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and USB PD controller or load switch, clamping surges before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping at full 40A surge-well below the 30V+ damage threshold of common PD controllers-without performance drift at 125°C. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) in remote meters or robotics control modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end transient shunt that diverts 40A surge energy to ground before it stresses the load switch's internal FET drain-source junction. Use Value: Prevents latch-up or permanent gate oxide damage in the load switch by holding clamping voltage ≤28V-even during repeated 1.2/50μs +8/20μs combination wave surges. |
| IoT Edge Device Power Rail Protection | Storage Device 24V Backup Supply Protection |
|
Use Scenario: Securing the main 22V input rail of a battery-powered IoT gateway operating in harsh electromagnetic environments (e.g., factory floors). IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS + MOV designs-handles both ESD and surge events with one footprint. Use Value: Delivers ±30kV ESD and 40A surge protection in a 1.6×1.6mm DFN-reducing board area by >60% versus discrete TVS + series impedance solutions. |
Use Scenario: Protecting the 24V backup supply input of enterprise SSD enclosures or NAS units against AC mains coupling and hot-swap transients. IC Role / Device Role / Timing Role: High-energy clamping device placed at the front-end of DC-DC converters feeding NAND flash controllers and DRAM buffers. Use Value: Limits transient overvoltage to ≤28V while maintaining <600nA leakage-preserving system uptime and preventing data corruption during brown-out recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package-Semtech's direct replacement part number for S2KW12C-3N; marked "T22" on top. | Identical use cases: USB PD, load switch input, industrial 22V rails. | Select TDS2211P when sourcing from distributors with Semtech's official part numbering; functionally identical to S2KW12C-3N. |
| SP1003-02HTG | TVS diode (not TDS architecture); 24V VRWM, 38.5V VC @ 40A, higher dynamic resistance (~150mΩ), clamping rises with temperature. | Suitable for lower-cost, non-critical 24V protection where 38.5V clamping is acceptable and thermal derating is managed externally. | Choose SP1003-02HTG only if clamping voltage margin allows >38V and temperature stability is not required-S2KW12C-3N offers superior performance where precision clamping matters. |
Compared with TDS2211P (identical functionality) and SP1003-02HTG (conventional TVS), the S2KW12C-3N delivers stable 27.5–28V clamping across current and temperature-enabling smaller safety margins, simplified thermal design, and higher reliability in USB PD and industrial load switch applications.
Availability
S2KW12C-3N is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge device power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance.
Supply support for S2KW12C-3N 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 protection, sensing, and signal integrity.
The S2KW12C-3N belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the exact clamping voltage of S2KW12C-3N at 40A surge current?
The S2KW12C-3N clamps at 27.6–28V under 40A peak pulse current (tp = 1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), as specified in the Electrical Characteristics table. This value remains stable across –40°C to +125°C, distinguishing it from conventional TVS diodes whose clamping voltage increases with temperature and current.
Is S2KW12C-3N pin-compatible with TDS2211P?
Yes-the S2KW12C-3N and TDS2211P share identical DFN 1.6mm × 1.6mm × 0.55mm 6-lead packaging, pin configuration (pins 1–3 = GND, pins 4–6 = IN), and electrical specifications. They are functionally and physically interchangeable; TDS2211P is Semtech's official part number, while S2KW12C-3N is a valid orderable variant with identical marking ("T22") and performance.
Can S2KW12C-3N protect USB Type-C CC lines?
No-S2KW12C-3N is rated for 22V working voltage and optimized for high-current power rail protection (e.g., VBus). For USB Type-C CC and SBU lines, Semtech recommends uClamp2411ZA (24V, low-capacitance TVS) to avoid overstress during VBus shorts. The S2KW12C-3N's 175pF capacitance and 3-pin parallel input structure make it unsuitable for differential signaling lines.
What is the maximum operating temperature for S2KW12C-3N?
The S2KW12C-3N is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage and leakage current remain within specification across this full range, as verified in Typical Characteristics plots (clamping vs. temperature, leakage vs. temperature). Junction temperature may reach +150°C under extreme surge conditions but is thermally limited by package construction.
Does S2KW12C-3N require a thermal pad on the PCB?
No-unlike power MOSFETs or linear regulators, the S2KW12C-3N dissipates surge energy in its channel during transient conduction and does not rely on thermal conduction through an exposed pad. The datasheet explicitly states "no thermal pad is needed." Instead, robust grounding via all three GND pins (1, 2, 3) and short, wide traces to a solid ground plane are essential for achieving rated 40A surge performance.
S2KW12C-3N 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):
- 12000 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 12 V @ 2 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 mA @ 12000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KW12C-3N FAQ
1.How can I place an order for S2KW12C-3N through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KW12C-3N 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 S2KW12C-3N reliable?
The price and inventory of S2KW12C-3N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KW12C-3N is usually 5 days.
3.What payment methods are accepted for S2KW12C-3N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KW12C-3N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KW12C-3N?
S2KW12C-3N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KW12C-3N 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 S2KW12C-3N?
For technical support, including S2KW12C-3N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KW12C-3N requirements.
6.How does Aetrix verify that S2KW12C-3N is sourced from the original manufacturer or authorized distributors?
All S2KW12C-3N 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 S2KW12C-3N meets industry standards.
7.What is the process for return or replacement of S2KW12C-3N?
All S2KW12C-3N units undergo pre-shipment inspection (PSI). If there is an issue with S2KW12C-3N, 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 S2KW12C-3N part is unused and in its original packaging.
Return procedure for S2KW12C-3N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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