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Semtech Corporation SR70.TCT
- Part No.:
- SR70.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
SR70.TCT.pdf
- Description:
- TVS DIODE 70VWM 7VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,731
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect single 22V I/O or power lines against high-energy EOS events, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current capability, and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD bus protection and industrial load switch input stages.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, low 175pF junction capacitance at 22V, and compatibility with 22V working voltage systems requiring robust EOS defense beyond standard TVS limitations.
Technical Context
The TDS2211P 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 due to decreasing RDS(on) under increasing current - delivering 27.5–28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω).
It operates from −40°C to +125°C with <600nA reverse leakage at 22V, 175pF capacitance at 1MHz/22V, and 20mΩ dynamic resistance measured between 1A and 40A (8/20μs), enabling reliable protection in thermally demanding environments without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 industrial surge immunity testing. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD immunity requirements for external connectors and user-accessible ports. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough to avoid signal integrity impact on 20V DC-biased power rails and slow control lines. |
| Dynamic Resistance | 20mΩ (1A–40A, 8/20μs) - enables flat clamping behavior and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, 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 minimize inductance and maximize 40A handling. |
| 4, 5, 6 | IN | Protected line input - connects directly to VBus or power/data line; all three pins are internally tied and must be shorted externally for full surge rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS with active shunt architecture - delivers near-constant clamping independent of surge amplitude or temperature. |
| Stable clamping over temperature | 27.5–28V clamping maintained from −40°C to +125°C - eliminates thermal derating required for silicon TVS diodes. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated exposure to lightning-induced surges per IEC 61000-4-5. |
| Low dynamic resistance | 20mΩ effective impedance during conduction - reduces voltage overshoot and improves energy dissipation efficiency. |
| Compact DFN footprint | 1.6mm × 1.6mm area - saves >50% board space vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 6-pin thermal robustness. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBus lines in USB-C PD ports against ESD, lightning surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed at connector entry point, upstream of PD controller and load switch. Use Value: Maintains 27.5–28V clamping at full 40A surge - prevents overvoltage damage to sensitive PD controllers rated ≤30V absolute max. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage stress on internal FET gate oxide and drain-source junction. Use Value: Keeps clamping voltage below 30V across −40°C to +125°C - avoids latch-up or permanent failure of load switch under repeated surge exposure. |
| Notebook/Tablet 22V System Rail Protection | IoT Device Power Input Protection |
Use Scenario: Securing main 22V DC input rails in portable computing devices subject to accidental adapter misconnection or ESD discharge. IC Role / Device Role / Timing Role: Standalone rail protector replacing multi-device TVS arrays, integrated before DC-DC converters. Use Value: Single-component solution with 175pF capacitance - avoids signal distortion on power rails while meeting IEC 61000-4-2/4-5 compliance. |
Use Scenario: Hardening 22V auxiliary power inputs in battery-powered IoT gateways exposed to field-installed wiring transients. IC Role / Device Role / Timing Role: First-line defense against induced surges from long cable runs or proximity to AC mains. Use Value: Delivers 40A surge handling in 1.6mm² footprint - enables compact, sealed enclosure designs without sacrificing reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no FET-based regulation. | Higher clamping voltage limits use in 24V-tolerant systems; requires larger package (DO-214AC) and thermal derating above 85°C. | Select SMAJ22A only if cost sensitivity outweighs clamping performance and board space constraints. |
| TPD2E001DRYR | Low-capacitance (1.5pF) dual-channel ESD protector; 22V VRWM, 28V VC @ 1A - not rated for 40A surge or IEC 61000-4-5. | Designed for high-speed data lines (USB 2.0, I²C), not power rail protection; lacks energy-handling capability for EOS events. | Use TPD2E001DRYR only for secondary ESD protection on low-voltage signal paths - never as primary 22V rail clamp. |
Compared with SMAJ22A and TPD2E001DRYR, the TDS2211P uniquely combines 40A surge capability, 27.5–28V clamping stability across temperature, and 1.6mm² DFN packaging - making it the only option among the three suitable for primary 22V power rail protection in USB PD and industrial load switch applications.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and notebook 22V system rail protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TDS2211P 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 connectivity.
The TDS family was developed to overcome clamping voltage drift and thermal derating limitations of conventional TVS diodes - targeting high-reliability 22V–36V power rail and interface protection in industrial, computing, and USB ecosystem applications.
FAQ
What is the maximum continuous operating voltage for TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage. This makes it suitable for nominal 20V USB PD buses and other 22V-rated power rails where sustained voltage operation is required without triggering conduction.
How does TDS2211P differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), the TDS2211P uses a triggered FET shunt that maintains 27.5–28V clamping from 1A to 40A. Its dynamic resistance drops with current, resulting in flat clamping across the full surge range and stable performance from −40°C to +125°C.
Can TDS2211P be used on high-speed data lines like USB 3.x or PCIe?
No - the TDS2211P has 175pF junction capacitance at 22V, which would severely degrade signal integrity on high-speed differential pairs. It is intended exclusively for DC-biased power rails or low-frequency control lines. For USB 3.x or PCIe, low-capacitance ESD suppressors such as RClamp3371ZC (<0.25pF) must be used instead of TDS2211P.
What is the recommended PCB layout for optimal surge performance of TDS2211P?
All three IN pins (4, 5, 6) must be shorted together with a low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect directly to a solid ground plane using multiple vias. Place TDS2211P within 2mm of the connector entry point to minimize parasitic inductance and prevent transient coupling to adjacent traces during fast ESD events.
Is TDS2211P compliant with RoHS and halogen-free standards?
Yes - the TDS2211P is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and lead finish is lead-free. Marking code "T22" with date code appears on the top surface, and the device ships in 7-inch tape-and-reel packaging (3,000 units per reel).
SR70.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- RailClamp®, SR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V (Max)
- Voltage - Breakdown (Min):
- 85V
- Voltage - Clamping (Max) @ Ipp:
- 7V
- Current - Peak Pulse (10/1000µs):
- 24A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
SR70.TCT FAQ
1.How can I place an order for SR70.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SR70.TCT 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 SR70.TCT reliable?
The price and inventory of SR70.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR70.TCT is usually 5 days.
3.What payment methods are accepted for SR70.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR70.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR70.TCT?
SR70.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR70.TCT 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 SR70.TCT?
For technical support, including SR70.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR70.TCT requirements.
6.How does Aetrix verify that SR70.TCT is sourced from the original manufacturer or authorized distributors?
All SR70.TCT 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 SR70.TCT meets industry standards.
7.What is the process for return or replacement of SR70.TCT?
All SR70.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SR70.TCT, 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 SR70.TCT part is unused and in its original packaging.
Return procedure for SR70.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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