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Semtech Corporation UCLAMP2492SQTCT
- Part No.:
- UCLAMP2492SQTCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
UCLAMP2492SQTCT.pdf
- Description:
- TVS DIODE 24VWM 50VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,288
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Product details
Overview
UCLAMP2492SQTCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 24V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 28V clamping voltage across temperature and current range.
For engineers reviewing the UCLAMP2492SQTCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF), and DFN 1.6×1.6mm package compatibility with space-constrained USB PD and IoT designs.
Technical Context
The UCLAMP2492SQTCT 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 at 24A and 40A-due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains <600 nA reverse leakage at 22V, and achieves 1120W peak pulse power handling. Its 175 pF junction capacitance at 22V/1MHz and 20 mΩ dynamic resistance support robust signal integrity preservation in high-speed bus protection applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - defines maximum continuous DC operating voltage on protected line without leakage or conduction |
| Clamping Voltage | 28 V at 40A (8/20μs) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - low enough to avoid signal distortion on USB 2.0 and CC/SBU lines |
| Dynamic Resistance | 20 mΩ - enables flat clamping response and minimizes voltage overshoot during fast transients |
| Package | DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead - supports high-density PCB layout near connectors with minimal footprint |
Pinout & Package
UCLAMP2492SQTCT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pins 1–3 are internally connected to GND, and pins 4–6 serve as the protected input node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Ground (GND) | Common return path for surge current; all three must be connected to maximize current sharing and minimize parasitic inductance |
| 4, 5, 6 | Input (IN) | Protected line connection point; parallel routing required to ensure equal current distribution and full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V from 24A to 40A - eliminates design margin inflation needed with traditional TVS devices |
| FET-based shunt topology | RDS(on) drops under surge - enables low-voltage clamping independent of temperature or current magnitude |
| High-temperature stability | Clamping remains 27.5–28 V from –40°C to +125°C - removes derating calculations for industrial ambient conditions |
| Low-leakage protection | ≤600 nA at 22 V - prevents power loss or false triggering in always-on battery-powered IoT nodes |
| UL 94V-0 molding compound | Flame-retardant encapsulation - satisfies safety compliance for enclosed industrial and consumer enclosures |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting surge energy to ground before reaching PD controller or load switch. Use Value: Maintains 28V clamping at 40A and 125°C - prevents overvoltage damage to TPS6598x or STUSB4500 PD controllers without requiring oversized TVS margins. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., ON Semi NIS513x) against 1kV/42Ω surges per IEC 61000-4-5 in remote metering or robotics. IC Role / Device Role / Timing Role: Primary front-end EOS protector, absorbing transient energy before it reaches the switch's internal MOSFET gate oxide. Use Value: Limits clamping to 28V across full temperature range - keeps stress below 30V absolute maximum rating of typical 30V load switch inputs. |
| IoT Sensor Hub Data Line Protection | Storage Device SATA/PCIe Power Rail Protection |
|
Use Scenario: Securing 24V auxiliary power rails feeding wireless sensor nodes in smart building gateways exposed to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Single-line EOS suppressor on 24V bias rail, coordinated with low-capacitance TVS on signal lines (e.g., RClamp3371ZC). Use Value: 175 pF capacitance avoids loading effects on 100 kHz–1 MHz sensor bias networks while delivering ±4kV EFT immunity per IEC 61000-4-4. |
Use Scenario: Protecting 24V auxiliary power inputs on NVMe SSD modules or SAS backplanes subjected to hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: High-energy clamping device on 24V standby or auxiliary rail, placed adjacent to edge connector to minimize trace inductance. Use Value: 1120W peak pulse power rating handles multiple sequential 8/20μs surges - extends reliability beyond standard 600W TVS solutions in enterprise storage environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22V working voltage, identical 28V clamping, same DFN-6 package and pinout | Optimized for 22V systems (e.g., USB PD 20V max); slightly lower VRWM than UCLAMP2492SQTCT | Select when protecting 22V nominal buses where tighter VRWM margin is required |
| UCLAMP3302H.TCT | 33V working voltage, 36V clamping, higher 60A IPP rating, same footprint | Suitable for 33V industrial control rails; higher clamping may exceed downstream IC limits in 24V systems | Choose only if system requires >24V operating margin and can tolerate 36V clamping during surge |
Compared with TDS2211P and UCLAMP3302H.TCT, UCLAMP2492SQTCT provides optimal balance for 24V applications: its 22V VRWM ensures no leakage at rated bus voltage, its 28V clamping protects 30V-tolerant ICs, and its 40A rating meets EN 61000-4-5 Level 4 without overdesign.
Availability
UCLAMP2492SQTCT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch protection, and IoT sensor hub designs requiring stable component supply, consistent parametric performance, and long-term lifecycle availability.
Supply support for UCLAMP2492SQTCT 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 UCLAMP family targets high-reliability transient suppression in next-generation connectivity interfaces, emphasizing stable clamping, low capacitance, and compact packaging for USB, PCIe, and industrial Ethernet applications.
FAQ
What is the maximum continuous operating voltage for UCLAMP2492SQTCT?
The UCLAMP2492SQTCT has a reverse stand-off voltage (VRWM) of 22 V, meaning it reliably blocks up to 22 V DC without significant leakage current. This makes it suitable for 24V nominal systems where transient headroom is required but steady-state voltage remains within specification. Exceeding 22 V continuously risks increased leakage or premature conduction.
How does UCLAMP2492SQTCT achieve stable clamping voltage across temperature?
UCLAMP2492SQTCT uses a FET-based shunt architecture instead of a PN-junction TVS. Its trigger circuit activates a low-RDS(on) FET during transients, resulting in clamping dominated by the fixed trigger voltage-not junction characteristics. As confirmed in the datasheet, clamping stays between 27.5 V and 28 V from –40°C to +125°C, unlike conventional TVS diodes whose clamping rises with temperature.
Can UCLAMP2492SQTCT replace standard TVS diodes in USB PD designs?
Yes-UCLAMP2492SQTCT is specifically validated for USB PD bus protection, offering superior clamping stability and lower dynamic resistance than typical TVS diodes. Its 28 V clamping at 40A ensures USB PD controllers (e.g., TUSB73x, STUSB4500) remain within safe operating limits even at elevated temperatures, eliminating the need for oversized TVS ratings to compensate for thermal drift.
What is the recommended PCB layout for UCLAMP2492SQTCT?
Place UCLAMP2492SQTCT as close as possible to the protected connector. Connect all three IN pins (4–6) via a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple vias. Avoid thermal relief on GND pads and minimize trace length to reduce parasitic inductance-critical for maintaining 40A surge capability and fast response.
Is UCLAMP2492SQTCT compliant with environmental and safety standards?
Yes-UCLAMP2492SQTCT is Pb-free, halogen-free, and RoHS/WEEE compliant. Its molding compound meets UL 94V-0 flammability rating, and it passes IEC 61000-4-2 (±30 kV ESD), IEC 61000-4-4 (±4 kV EFT), and IEC 61000-4-5 (40A 8/20μs surge) testing. These certifications support use in commercial, industrial, and consumer end-equipment requiring certified EMC robustness.
UCLAMP2492SQTCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.5V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 250W
- Power Line Protection:
- Yes
- Applications:
- CAN
- Capacitance @ Frequency:
- 15pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
UCLAMP2492SQTCT FAQ
1.How can I place an order for UCLAMP2492SQTCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP2492SQTCT 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 UCLAMP2492SQTCT reliable?
The price and inventory of UCLAMP2492SQTCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP2492SQTCT is usually 5 days.
3.What payment methods are accepted for UCLAMP2492SQTCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP2492SQTCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP2492SQTCT?
UCLAMP2492SQTCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP2492SQTCT 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 UCLAMP2492SQTCT?
For technical support, including UCLAMP2492SQTCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP2492SQTCT requirements.
6.How does Aetrix verify that UCLAMP2492SQTCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP2492SQTCT 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 UCLAMP2492SQTCT meets industry standards.
7.What is the process for return or replacement of UCLAMP2492SQTCT?
All UCLAMP2492SQTCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP2492SQTCT, 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 UCLAMP2492SQTCT part is unused and in its original packaging.
Return procedure for UCLAMP2492SQTCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP2492SQTCT Tags
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