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Semtech Corporation SL12.TCT
- Part No.:
- SL12.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SL12.TCT.pdf
- Description:
- TVS DIODE 12VWM 24VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,289
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect 22V-rated I/O or power lines against EOS, ESD, and surge events. It delivers ±30kV IEC 61000-4-2 contact/air ESD immunity, 40A (8/20μs) peak pulse current handling, and a tightly regulated 27.5–28V clamping voltage across full temperature and current range - enabling robust USB Type-C PD bus protection in industrial and portable systems.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp FET-based architecture, DFN 1.6×1.6mm 6-lead package, 175pF junction capacitance at 22V, sub-20mΩ dynamic resistance, and guaranteed clamping stability from −40°C to +125°C - critical for high-reliability load switch input and USB PD interface protection.
Technical Context
The TDS2211P uses a precision-triggered surge-rated FET as its primary protection element, activated only during overvoltage transients - unlike conventional TVS diodes that conduct continuously above VBR. Its trigger circuit initiates conduction when input exceeds ~25V, turning on the shunt FET with RDS(on) < 0.1Ω to clamp energy directly to ground.
This architecture yields near-constant clamping voltage (27.5–28V) from 24A to 40A IPP and across −40°C to +125°C, while maintaining low leakage (<600nA at 22V) and 175pF capacitance - making it suitable for high-speed 22V bus lines where voltage margin and signal integrity are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards without derating. |
| Dynamic Resistance | 20mΩ - enables flat clamping response by minimizing ΔV = I × RDYN rise across full current range. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for USB PD VBUS line protection without distorting power delivery signaling. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables ultra-compact placement adjacent to connectors with minimal PCB area. |
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 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., USB PD VBUS); all three pins are internally tied and must be shorted externally to handle full 40A surge capability. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces voltage-dependent TVS clamping with active switching - eliminates linear VC = VBR + IPP×RDYN drift. |
| Constant clamping across temperature | Maintains 27.5–28V clamping from −40°C to +125°C - avoids thermal derating required for standard TVS devices. |
| Low dynamic resistance | 20mΩ enables stable clamping under 40A surges without voltage overshoot or thermal runaway. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports repeated industrial-level lightning-induced transients. |
| Compact DFN footprint | 1.6×1.6mm area saves >50% board space vs. comparable SOT-23 or SOIC TVS solutions. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V USB PD VBUS lines against ESD, lightning surges, and hot-plug transients in notebooks, docking stations, and chargers. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller/load switch, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents false triggering or latch-up in PD controllers rated for ≤30V absolute max. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways exposed to field surges. IC Role / Device Role / Timing Role: Front-end transient diverter that routes surge energy away from the load switch's internal FET drain-source junction. Use Value: Limits voltage stress on the load switch to <28V during ±1kV (1.2/50μs) surges - avoiding gate oxide damage or avalanche failure. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Power Line |
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and edge nodes subjected to ESD during handling or installation. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power input, operating in parallel with upstream e-fuse or PMIC. Use Value: Delivers ±30kV ESD immunity without adding series impedance or capacitance that would affect brownout detection or wake-up timing. |
Use Scenario: Protecting 22V backup power inputs in NVMe SSDs and enterprise storage controllers during hot-swap or system-level surge events. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) shunt device placed at connector entry point. Use Value: Prevents data corruption or controller reset caused by transient-induced voltage spikes exceeding 22V rail tolerance. |
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; no constant-clamp architecture. | Higher clamping voltage (≥35.5V) limits use with 30V-tolerant ICs; degrades >100°C. | Select when cost sensitivity outweighs clamping precision and thermal stability requirements. |
| TPD2E001DRYR | Low-capacitance (1.5pF) dual-channel ESD array; 22V VRWM, 28V VC @ 4A; rated only for ESD, not surge. | Rated for IEC 61000-4-2 only (±8kV contact); insufficient for IEC 61000-4-5 surge immunity. | Use only for high-speed data line ESD protection - never as primary VBUS surge suppressor. |
Compared with SMAJ22A and TPD2E001DRYR, the TDS2211P uniquely combines 40A surge capability, ±30kV ESD rating, and thermally stable 27.5–28V clamping - making it the only option qualified for mission-critical 22V power rail protection in industrial USB PD and load switch applications.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT 22V power rail protection requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
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 protection, sensing, and connectivity.
The TDS family was engineered specifically to replace conventional TVS diodes in high-reliability 12–36V power rail protection, delivering constant-voltage clamping via integrated FET switching - targeting USB PD, industrial automation, and ruggedized IoT endpoints.
FAQ
What is the maximum continuous operating voltage for TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it can safely operate on DC power rails up to 22V without significant leakage or degradation. This makes TDS2211P ideal for protecting USB PD VBUS lines and other 22V industrial power rails where sustained voltage margin is critical.
How does TDS2211P achieve constant clamping voltage across temperature?
TDS2211P achieves constant clamping by using a precision-triggered FET instead of a PN-junction diode. When triggered, the FET enters a low-RDS(on) state (<0.1Ω), causing clamping voltage to track the trigger circuit's breakdown voltage (~27V) rather than rising with current or temperature. This design ensures TDS2211P maintains 27.5–28V clamping from −40°C to +125°C.
Can TDS2211P replace a standard TVS diode in an existing 22V design?
TDS2211P can replace standard TVS diodes in 22V designs where superior clamping stability and surge robustness are needed - but requires verifying PCB layout: all three IN pins (4–6) and all three GND pins (1–3) must be shorted externally and connected with low-inductance traces. Unlike TVS diodes, TDS2211P does not require thermal pads but demands tight placement near the protected connector.
What is the junction capacitance of TDS2211P and why does it matter?
TDS2211P exhibits 175pF junction capacitance at 22V and 1MHz. This value is low enough to avoid distorting USB PD power negotiation signaling or causing excessive filtering on 22V power rails, yet high enough to ensure effective high-frequency ESD energy shunting - striking a balance critical for VBUS line protection where both power integrity and transient immunity are essential.
Does TDS2211P meet IEC 61000-4-5 surge immunity standards?
Yes, TDS2211P is rated for 40A peak pulse current (8/20μs) and ±1kV (1.2/50μs, RS=42Ω) per IEC 61000-4-5, satisfying Level 4 industrial surge immunity requirements. Its constant clamping behavior ensures compliance remains valid across the full −40°C to +125°C operating range - unlike TVS diodes whose clamping voltage rises with temperature.
SL12.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- SL
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- 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-23-3
SL12.TCT FAQ
1.How can I place an order for SL12.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SL12.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 SL12.TCT reliable?
The price and inventory of SL12.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SL12.TCT is usually 5 days.
3.What payment methods are accepted for SL12.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SL12.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SL12.TCT?
SL12.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SL12.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 SL12.TCT?
For technical support, including SL12.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SL12.TCT requirements.
6.How does Aetrix verify that SL12.TCT is sourced from the original manufacturer or authorized distributors?
All SL12.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 SL12.TCT meets industry standards.
7.What is the process for return or replacement of SL12.TCT?
All SL12.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SL12.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 SL12.TCT part is unused and in its original packaging.
Return procedure for SL12.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SL12.TCT Tags
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