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Semtech Corporation S1KW32KA-2
- Part No.:
- S1KW32KA-2
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S1KW32KA-2.pdf
- Description:
- DIODE GEN PURP 3.2KV 1.5A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:4,360
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Product details
Overview
S1KW32KA-2 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 electronics.
For engineers reviewing the S1KW32KA-2 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for minimal voltage overshoot, DFN-6 footprint compatibility, and compliance with IEC 61000-4-2/4-4/4-5 standards in compact 1.6×1.6mm layouts.
Technical Context
The S1KW32KA-2 employs 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 delivers 1120W peak pulse power (8/20μs), supports ±1kV unsymmetrical surge (1.2/50μs, RS=42Ω), and maintains 175pF junction capacitance at 22V/1MHz - enabling use on high-speed power rails without signal integrity compromise.
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) - ensures protected ICs (e.g., load switches, PD controllers) remain below damage thresholds. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - eliminates need for secondary ESD stages in USB Type-C connectors. |
| Dynamic Resistance | 20mΩ - minimizes voltage rise during fast transients, critical for protecting low-voltage tolerant FET gates. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid loading 20V power rails while maintaining robust surge handling. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), RoHS-compliant, UL 94V-0 molding compound, lead-free finish, 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 sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBus); parallel connection of all three pins ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - avoids overvoltage stress on downstream FETs during multi-pulse surges. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - enables reliable operation in automotive under-hood or industrial enclosures. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces I²R losses and thermal stress during sustained surge events. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - suppresses burst noise coupling into power rails of IoT sensor nodes. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the 20–22V VBus line of a USB Type-C port supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting EOS energy before it reaches the PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents latch-up or gate oxide damage in PD controllers rated for ≤30V absolute maximum. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) exposed to lightning-induced surges in remote metering or robotics. IC Role / Device Role / Timing Role: Primary front-end protector absorbing 40A/1120W transients before they stress the internal MOSFET of the load switch. Use Value: Limits voltage at the load switch VIN pin to ≤28V - avoids exceeding the 30V VDS(max) rating and prevents catastrophic failure during 1.2/50μs surges. |
| IoT Edge Node Power Rail Protection | Tablet/Notebook VBus Line Protection |
|
Use Scenario: Securing the 22V auxiliary power rail of a battery-powered IoT gateway subjected to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Solid-state EOS suppressor replacing traditional TVS diodes to eliminate clamping voltage drift at elevated ambient temperatures. Use Value: Delivers ±30kV ESD immunity with no performance degradation at 85°C - ensures field reliability without thermal derating. |
Use Scenario: Protecting the main VBus line in thin-profile notebooks where board space is constrained and thermal dissipation is limited. IC Role / Device Role / Timing Role: Compact DFN-6 transient suppressor mounted adjacent to the USB-C receptacle to minimize trace inductance. Use Value: 1.6×1.6mm footprint saves >60% area vs. SO-8 TVS solutions - enables layout in tight bezel regions without sacrificing 40A surge rating. |
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 functional design, identical electrical specs and package - direct manufacturer-referenced variant of S1KW32KA-2; marking code T22 indicates same 22V family. | Identical use cases: USB PD, load switch, industrial VBus. | Select when requiring Semtech's documented TDS architecture with verified FET-based clamping stability. |
| SP1003-220K | TVS diode (not TDS): higher clamping (~38V at 24A/125°C), fixed RDYN, 22V VRWM, SOD-323 package. | Limited to lower-energy surges; unsuitable where clamping voltage drift with temperature or current is unacceptable. | Choose only for cost-sensitive, non-critical 22V rails where ±30kV ESD and 40A surge are not required. |
Compared with TDS2211P and SP1003-220K, the S1KW32KA-2 offers identical performance to TDS2211P in clamping stability and surge handling, while SP1003-220K introduces significant voltage overshoot risk above 25°C - making S1KW32KA-2 the sole choice for thermally demanding or high-reliability 22V power rail protection.
Availability
S1KW32KA-2 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for S1KW32KA-2 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 high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity.
The S1KW32KA-2 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping across temperature and current is mandatory.
FAQ
What is the exact clamping voltage of S1KW32KA-2 at 40A surge current?
The S1KW32KA-2 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 its electrical characteristics table. This value is guaranteed across −40°C to +125°C operating temperature and reflects the device's constant-clamp FET architecture - not a typical TVS diode's linear VC = VBR + IPP × RDYN behavior.
Is S1KW32KA-2 pin-compatible with TDS2211P?
Yes, S1KW32KA-2 is functionally and physically identical to TDS2211P: both use the same DFN-6 (1.6×1.6mm) package, share identical pin configuration (pins 1–3 = GND, pins 4–6 = IN), and exhibit matching electrical specifications including 22V working voltage, 40A peak pulse current, and 27.5–28V clamping. Semtech documentation confirms TDS2211P as the base part number for this family.
Can S1KW32KA-2 protect USB Type-C CC lines?
No, S1KW32KA-2 is not intended for USB Type-C CC (Configuration Channel) lines. Its 22V working voltage and 6-pin DFN layout are optimized for high-current VBus protection. CC lines require low-capacitance (<1pF), low-voltage (e.g., 5.5V) devices like uClamp2411ZA - using S1KW32KA-2 on CC would risk damage due to excessive leakage and incorrect voltage rating.
What is the junction capacitance of S1KW32KA-2 and how does it affect circuit design?
The S1KW32KA-2 has a junction capacitance of 175pF at 22V and 1MHz. This value is appropriate for 20–22V power rails but too high for high-speed data lines (e.g., USB SS, PCIe). In VBus protection applications, it introduces negligible impedance at DC/low frequencies but must be accounted for in transient simulation models - especially when placed near sensitive analog circuits or switching regulators.
Does S1KW32KA-2 meet IEC 61000-4-5 Level 4 surge immunity?
Yes, S1KW32KA-2 meets IEC 61000-4-5 Level 4 (±1kV, 1.2/50μs voltage waveform, RS = 42Ω, CS = 0.5μF) for unsymmetrical lines and supports 40A (8/20μs) surges - exceeding Level 4's 2kV open-circuit requirement when applied to 22V systems. Its 1120W peak pulse power rating and stable clamping ensure compliance without external series impedance.
S1KW32KA-2 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):
- 3200 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 32 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 3200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1KW32KA-2 FAQ
1.How can I place an order for S1KW32KA-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for S1KW32KA-2 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 S1KW32KA-2 reliable?
The price and inventory of S1KW32KA-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KW32KA-2 is usually 5 days.
3.What payment methods are accepted for S1KW32KA-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KW32KA-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1KW32KA-2?
S1KW32KA-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1KW32KA-2 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 S1KW32KA-2?
For technical support, including S1KW32KA-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KW32KA-2 requirements.
6.How does Aetrix verify that S1KW32KA-2 is sourced from the original manufacturer or authorized distributors?
All S1KW32KA-2 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 S1KW32KA-2 meets industry standards.
7.What is the process for return or replacement of S1KW32KA-2?
All S1KW32KA-2 units undergo pre-shipment inspection (PSI). If there is an issue with S1KW32KA-2, 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 S1KW32KA-2 part is unused and in its original packaging.
Return procedure for S1KW32KA-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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