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Semtech Corporation S2KW48KA-6
- Part No.:
- S2KW48KA-6
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Module
- Datasheet:
-
S2KW48KA-6.pdf
- Description:
- DIODE GEN PURP 48KV 3A MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:8,593
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Product details
Overview
S2KW48KA-6 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 ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBUS, and load switch inputs in industrial and portable electronics.
For engineers reviewing the S2KW48KA-6 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, temperature-stable clamping behavior, and real-world implementation details for EOS-critical bus protection.
Technical Context
The S2KW48KA-6 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 across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 27.5–28V clamping at 40A, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM = 22V - enabling robust protection without signal integrity compromise in high-speed power interfaces.
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) - stays below 30V damage threshold of common load switches and PD controllers. |
| 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 USB IF and IEC 61000-4-2 Class 4 requirements. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during surge conduction, critical for low-voltage margin designs. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails; not intended for high-speed data line protection. |
| Operating Temperature | −40°C to +125°C - supports extended-range operation in automotive-grade and industrial environments. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish. Pin 1 marked with laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected input terminal for 22V bus (e.g., USB PD VBUS); parallel connection ensures uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A surge range - eliminates design uncertainty from TVS voltage drift with current. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - enables reliable protection in uncontrolled thermal environments. |
| Low dynamic resistance | 20mΩ RDYN - reduces IR drop during surge, preserving downstream voltage margin for sensitive ICs. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated surge events without degradation in industrial applications. |
| Compact footprint | 1.6mm × 1.6mm DFN - saves >50% board area vs. legacy SO-8 or SOT-23 TVS solutions with comparable ratings. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller/load switch. Use Value: Maintains 27.5–28V clamping at full 40A surge, preventing overvoltage damage to HS2950P or similar load switches even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of e-fuse or smart load switches in remote meters, PLC I/O modules, and robotics power stages. IC Role / Device Role / Timing Role: Front-end transient diverter absorbing lightning-induced surges before they reach the switch's internal FET. Use Value: Limits voltage stress on switch gate oxide and drain-source junction via sub-30V clamping, extending device lifetime under repetitive surge exposure. |
| IoT Device DC Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways exposed to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, upstream of DC-DC converters and PMICs. Use Value: Delivers ±30kV ESD immunity and 40A surge capability in a 2.56mm² footprint - critical for space-constrained edge devices. |
Use Scenario: Protecting 19–20V adapter input rails in ultrabooks and tablets against AC-line coupled transients and user-handling ESD. IC Role / Device Role / Timing Role: High-energy clamping device placed immediately after barrel jack or USB-C receptacle. Use Value: Stable 27.5–28V clamping across temperature ensures consistent protection during sustained CPU/GPU thermal loads. |
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 - direct manufacturer-recommended replacement for S2KW48KA-6. | Identical use case: 22V bus protection with 40A surge rating and ±30kV ESD. | Select TDS2211P when sourcing from Semtech's standard distribution channels; S2KW48KA-6 is a Semtech-marked variant with identical performance. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping at 24A, 0.25pF capacitance - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance data-line protection (e.g., USB-C CC pins), not high-current VBUS paths. | Not suitable as functional replacement for S2KW48KA-6 - insufficient surge rating and excessive clamping voltage for 22V power rail use. |
Compared with S2KW48KA-6, TDS2211P offers identical protection performance and form factor, while uClamp2411ZA serves a different signal-integrity-critical role with incompatible surge capability and clamping behavior - confirming S2KW48KA-6's niche in high-energy, low-clamp power rail protection.
Availability
S2KW48KA-6 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device DC power rails requiring stable component supply, long-term lifecycle support, and guaranteed EOS compliance.
Supply support for S2KW48KA-6 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 signal integrity.
The S2KW48KA-6 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability power rail protection where stable clamping and temperature insensitivity are mandatory.
FAQ
What is the exact function of the S2KW48KA-6 in a circuit?
The S2KW48KA-6 functions as a transient diverting suppressor that actively shunts high-energy EOS events-such as ESD, lightning-induced surges, and EFT-to ground using a precision-triggered FET. Unlike passive TVS diodes, it maintains a near-constant 27.5–28V clamping voltage across its full 40A surge range and operating temperature, making the S2KW48KA-6 ideal for protecting 22V power rails where voltage margin is tight.
Is the S2KW48KA-6 pin-compatible with standard TVS diodes in DFN-6 packages?
No - the S2KW48KA-6 uses a unique 3-pin input / 3-pin ground configuration (pins 4–6 = IN, pins 1–3 = GND), requiring dedicated PCB layout with parallel trace routing and multi-via grounding. Standard unidirectional TVS diodes in DFN-6 typically use anode/cathode/gnd or bidirectional configurations; substituting them for the S2KW48KA-6 would compromise surge current handling and clamping stability.
Does the S2KW48KA-6 require external bias or control signals to operate?
No - the S2KW48KA-6 is fully autonomous and requires no external power, enable signals, or configuration. Its internal trigger circuit activates the shunt FET automatically when transient voltage exceeds the breakdown threshold (~25–27.9V). This self-contained operation makes the S2KW48KA-6 suitable for always-on protection in battery-backed or hot-plug systems.
Can the S2KW48KA-6 be used on high-speed data lines like USB SuperSpeed or PCIe?
No - the S2KW48KA-6 has 175pF junction capacitance at 22V, which would severely degrade signal integrity on high-speed differential pairs. It is explicitly designed for DC power rails and low-frequency I/O lines. For USB SS, DP/DM, or other high-speed interfaces, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), not the S2KW48KA-6.
How does the S2KW48KA-6's clamping performance compare to traditional TVS diodes at elevated temperatures?
At 125°C, conventional 22V TVS diodes typically exhibit clamping voltages exceeding 38V at 24A due to positive temperature coefficient of dynamic resistance. In contrast, the S2KW48KA-6 maintains 27.5–28V clamping across −40°C to +125°C - a >10V improvement in worst-case overvoltage margin. This stability is intrinsic to its FET-based architecture and is confirmed in the S2KW48KA-6's published clamping vs. temperature curves.
S2KW48KA-6 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):
- 48000 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 48 V @ 6 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 2 µA @ 48000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KW48KA-6 FAQ
1.How can I place an order for S2KW48KA-6 through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KW48KA-6 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 S2KW48KA-6 reliable?
The price and inventory of S2KW48KA-6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KW48KA-6 is usually 5 days.
3.What payment methods are accepted for S2KW48KA-6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KW48KA-6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KW48KA-6?
S2KW48KA-6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KW48KA-6 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 S2KW48KA-6?
For technical support, including S2KW48KA-6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KW48KA-6 requirements.
6.How does Aetrix verify that S2KW48KA-6 is sourced from the original manufacturer or authorized distributors?
All S2KW48KA-6 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 S2KW48KA-6 meets industry standards.
7.What is the process for return or replacement of S2KW48KA-6?
All S2KW48KA-6 units undergo pre-shipment inspection (PSI). If there is an issue with S2KW48KA-6, 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 S2KW48KA-6 part is unused and in its original packaging.
Return procedure for S2KW48KA-6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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