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Semtech Corporation SC4626HSKTRT
- Part No.:
- SC4626HSKTRT
- Manufacturer:
- Semtech Corporation
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SC4626HSKTRT.pdf
- Description:
- IC REG BUCK 1.5V 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
SC4626HSKTRT 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, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC4626HSKTRT datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp behavior across temperature and current, low 175pF junction capacitance at 22V, DFN 1.6×1.6mm 6-lead package, and FET-based shunt architecture enabling superior surge handling versus conventional TVS diodes.
Technical Context
The SC4626HSKTRT implements a precision-triggered, surge-rated MOSFET as its primary protection element - not a pn-junction diode - with a dedicated trigger circuit that activates the shunt FET when transient voltage exceeds breakdown. This architecture yields near-constant clamping voltage (27.5–28V) from 24A to 40A and across –40°C to +125°C.
Unlike standard TVS devices whose clamping voltage rises linearly with IPP due to fixed RDYN, the SC4626HSKTRT's RDS(on) decreases under surge, maintaining clamping stability. Its 175pF capacitance at VR = 22V and 1MHz supports high-speed bus protection without signal integrity degradation.
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 + 1.2/50μs combo wave) - stays below 29V across full surge range, protecting 30V-tolerant controllers. |
| Peak Pulse Current | 40A (tp = 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 Type-C ESD requirements by 2× minimum. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing energy dissipation in the protected line. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for USB PD 20V bus protection without degrading rise/fall times. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - saves >50% board area vs. SO-8 TVS solutions while supporting high-current PCB routing. |
Pinout & Package
SC4626HSKTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad (no solder mask defined). All pins must be connected: Pins 1–3 are GND; Pins 4–6 are IN (parallel-connected input terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current - all three must be vias-connected to internal ground plane to minimize inductance and maximize 40A capability. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals tied directly to protected line (e.g., USB PD VBus) - ensures uniform current sharing and eliminates single-point failure. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Replaces conventional TVS diodes with a triggered MOSFET, delivering flat clamping voltage independent of surge amplitude or temperature. |
| Constant clamping over temperature | 27.5–28V clamping maintained from –40°C to +125°C - eliminates thermal derating calculations required for silicon TVS. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces voltage overshoot during fast-rising transients and minimizes power dissipation in the device. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz bursts) - protects against repetitive switching noise in motor drives and PLCs. |
| Small-footprint DFN | 1.6mm × 1.6mm footprint with 0.55mm height - enables placement adjacent to USB-C connectors or load switch ICs with minimal trace length. |
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 PD negotiation against lightning-induced surges and connector ESD events. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at the connector, diverting transients before they reach the PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - avoids overvoltage damage to 30V-rated PD controllers where conventional TVS would clamp >38V at elevated temperature. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) in remote metering or robotics systems exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents latch-up or permanent failure of the load switch by holding clamping voltage below its absolute maximum rating (typically 30–36V), even during repeated 40A surges. |
| IoT Edge Node Power Rail Protection | Tablet/Notebook DC-DC Input Protection |
Use Scenario: Securing the 12–24V input rail of battery-powered IoT gateways subjected to ESD during field servicing and conducted surges from shared AC adapters. IC Role / Device Role / Timing Role: Single-component, low-capacitance surge suppressor replacing multi-device TVS+filter networks on compact PCBs. Use Value: Delivers 40A surge handling and ±30kV ESD in 2.56mm² area - eliminates need for larger SO-8 or SOT-23-6 alternatives while meeting IEC 61000-4-5 Class 3. |
Use Scenario: Protecting the input of buck converters powering CPU/GPU rails in thin client tablets, where space constraints limit discrete protection options. IC Role / Device Role / Timing Role: High-energy clamping device placed upstream of input capacitors to absorb fast transients before they propagate into sensitive regulation circuitry. Use Value: 175pF capacitance avoids resonance with typical 10–47μF input caps, and stable 28V clamping prevents overvoltage trips in 3.3V/5V/12V domain regulators. |
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 | Same die, identical electrical specs, same DFN 1.6×1.6mm package - only marking and reel packaging differ (TDS2211P.C uses dot-marked tape-and-reel). | No functional difference; both qualified for USB PD and industrial use per same Semtech qualification data. | Select TDS2211P.C if requiring Semtech's standard commercial reel format; SC4626HSKTRT may be sourced via alternate distribution channels with different date-code marking. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping at 24A, and 12pF capacitance - optimized for CC/SBU lines, not VBus. | Designed for low-capacitance data-line protection (CC, SBU), not high-current power rail clamping. | Not suitable as direct replacement for SC4626HSKTRT in VBus or load-switch applications due to insufficient surge rating and higher clamping voltage. |
Compared with TDS2211P.C, SC4626HSKTRT offers identical protection performance and package; compared with uClamp2411ZA, it delivers 67% higher peak current handling and 21% lower clamping voltage - making it the only viable option for 22V power rail EOS suppression where sustained 40A surge capability is mandatory.
Availability
SC4626HSKTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SC4626HSKTRT 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 SC4626HSKTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-energy EOS applications where stable clamping, temperature independence, and compact size are critical.
FAQ
What is the primary protection function of the SC4626HSKTRT?
The SC4626HSKTRT functions as a transient diverting suppressor that uses a triggered MOSFET to shunt high-energy electrical overstress (EOS) events - including ESD, lightning surges, and EFT - away from downstream components. Unlike TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A surge range and operating temperature, making SC4626HSKTRT ideal for protecting 22V power rails in USB PD and industrial systems.
Does the SC4626HSKTRT require external bias or control signals to operate?
No, the SC4626HSKTRT operates autonomously without any external bias, enable signals, or configuration. Its internal precision trigger circuit detects overvoltage conditions on the IN pins and automatically activates the shunt FET within nanoseconds. This self-contained operation makes SC4626HSKTRT suitable for always-on protection in unattended equipment such as remote sensors and industrial controllers.
Can the SC4626HSKTRT be used on data lines like USB SuperSpeed or DisplayPort?
No - the SC4626HSKTRT is not intended for high-speed data line protection due to its 175pF junction capacitance, which would severely degrade signal integrity on differential pairs operating above 100MHz. For USB SS, DP, or HDMI lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); SC4626HSKTRT is strictly for power or low-speed I/O line protection.
What is the recommended PCB layout for optimal performance of the SC4626HSKTRT?
Place SC4626HSKTRT as close as possible to the protected connector or entry point. Connect all three IN pins (4–6) with a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using ≥3 thermal vias. Avoid stubs or splits in the GND return path - this layout minimizes parasitic inductance and ensures SC4626HSKTRT delivers its rated 40A surge capability without voltage overshoot.
Is the SC4626HSKTRT compliant with automotive AEC-Q200 or industrial IEC 61000-6-2 standards?
The SC4626HSKTRT is not AEC-Q200 qualified and is not marketed for automotive use. However, it meets IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (±1kV/42Ω, 40A 8/20μs) - all core requirements of IEC 61000-6-2 for industrial environments. Its –40°C to +125°C operating range and robust DFN package make SC4626HSKTRT suitable for harsh industrial deployments outside automotive safety-critical domains.
SC4626HSKTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SC4626HSKTRT FAQ
1.How can I place an order for SC4626HSKTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4626HSKTRT 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 SC4626HSKTRT reliable?
The price and inventory of SC4626HSKTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4626HSKTRT is usually 5 days.
3.What payment methods are accepted for SC4626HSKTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4626HSKTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4626HSKTRT?
SC4626HSKTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4626HSKTRT 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 SC4626HSKTRT?
For technical support, including SC4626HSKTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4626HSKTRT requirements.
6.How does Aetrix verify that SC4626HSKTRT is sourced from the original manufacturer or authorized distributors?
All SC4626HSKTRT 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 SC4626HSKTRT meets industry standards.
7.What is the process for return or replacement of SC4626HSKTRT?
All SC4626HSKTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4626HSKTRT, 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 SC4626HSKTRT part is unused and in its original packaging.
Return procedure for SC4626HSKTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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