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Semtech Corporation SCH20000
- Part No.:
- SCH20000
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SCH20000.pdf
- Description:
- DIODE GP 20KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,634
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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 using a precision-triggered shunt FET architecture; it delivers ±30kV IEC 61000-4-2 ESD protection, 40A (8/20μs) peak pulse current handling, and a stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp behavior under 40A surges, DFN 1.6×1.6mm 6-lead footprint, low 20mΩ dynamic resistance, 175pF junction capacitance at 22V, and suitability for high-reliability 22V bus protection where conventional TVS diodes exhibit rising clamping voltage with temperature and current.
Technical Context
The TDS2211P implements a surge-rated MOSFET as the primary conduction element, activated by an integrated precision trigger circuit that senses overvoltage beyond ~25V breakdown and drives the FET into low-RDS(on) conduction. Unlike standard TVS diodes, its clamping voltage remains nearly flat (27.5–28V) from 1A to 40A due to decreasing dynamic resistance (<20mΩ) under surge conditions.
This architecture enables stable protection across –40°C to +125°C ambient, with minimal thermal derating - critical for USB PD interfaces operating near 20V and industrial equipment exposed to lightning-induced 1.2/50μs–8/20μs combination waveforms up to ±1kV (RS = 42Ω). The device does not require a thermal pad and dissipates energy via the FET channel rather than a PN junction.
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) - ensures downstream ICs (e.g., USB PD controllers) remain below absolute maximum ratings during worst-case surge |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and USB PD applications |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD immunity for handheld and connector-facing designs |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables ultra-compact placement near connectors with minimal PCB area (2.56 mm²) |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, 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 maximize current sharing and minimize parasitic inductance |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB-C); all three pins are internally tied and must be shorted externally to achieve full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across 1–40A and –40°C to +125°C - eliminates need for voltage margining in high-temp environments |
| Surge-Rated Shunt FET | Replaces traditional TVS junction with low-RDS(on) MOSFET - reduces thermal stress and improves long-term reliability under repeated surges |
| High-Energy Surge Handling | 1120W peak pulse power (8/20μs) - supports robust protection for industrial 22V systems facing lightning-induced transients |
| Low Dynamic Resistance | 20mΩ - minimizes voltage overshoot during sub-microsecond rise-time events (e.g., ESD), improving system-level immunity |
| Compact DFN Footprint | 1.6×1.6mm - saves >50% board space vs. comparable SOT-23 or SOIC TVS solutions while maintaining 6-pin current-handling capability |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles against ESD, lightning surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed directly at the connector, shunting surge energy to ground before it reaches the PD controller or e-fuse. Use Value: Maintains clamping at ≤28V across temperature and current - avoids false triggering or damage to 30V-tolerant PD controllers (e.g., STUSB4500, CYPD3177) even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P, TPS22990) in remote meters and robotics. IC Role / Device Role / Timing Role: High-energy transient clamp upstream of the load switch's internal FET, preventing gate oxide rupture or drain-source avalanche failure. Use Value: Limits voltage across the load switch's VIN-to-GND path to 28V during ±1kV (1.2/50μs) surges - well below typical 30–40V absolute max ratings of integrated power switches. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary rails in battery-powered IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-component, low-capacitance protector for always-on power inputs where PCB space and thermal management are constrained. Use Value: 175pF capacitance avoids filtering effects on 22V bias rails; ±30kV ESD rating ensures compliance with IEC 61000-4-2 Level 4 without additional shielding. |
Use Scenario: Protecting 22V backup or auxiliary supplies in NVMe SSD enclosures and enterprise storage backplanes. IC Role / Device Role / Timing Role: Surge suppression on 22V VDDQ or auxiliary power lines susceptible to coupling from adjacent high-speed data lanes. Use Value: Stable clamping prevents latch-up or overvoltage shutdown in PMICs and flash memory controllers during hot-swap or cable-disconnect events. |
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 voltage rises with temperature and current | Limited to lower-energy surges; unsuitable for sustained 40A or high-temp operation where flat clamping is required | Use only where cost sensitivity outweighs clamping stability needs and peak currents stay below 15A |
| TPD2E007DRYR | Low-capacitance (1.5pF) dual-channel ESD protector; 22V VRWM, but rated only for 4A (8/20μs) and ±8kV ESD - no surge capability | Designed for high-speed data lines (e.g., USB 2.0, I²C), not power rail protection | Select only for signal-line ESD hardening; never as a replacement for TDS2211P's 40A power-line surge role |
Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely combines 40A surge rating, ±30kV ESD immunity, and temperature-stable 28V clamping in a 1.6mm² DFN - making it the only viable option for compact, high-reliability 22V bus protection where conventional TVS devices fail to maintain safe voltage margins under real-world thermal and current stress.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT edge node power buses, and storage device 22V rail protection requiring stable component supply, long-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 high-performance analog and mixed-signal semiconductors for power management, protection, sensing, and connectivity.
The TDS family was developed specifically to replace conventional TVS diodes in high-energy EOS protection applications - delivering flat clamping, superior thermal stability, and compact form factors for next-generation USB, industrial, and automotive power interfaces.
FAQ
What is the maximum continuous operating voltage for the TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously withstand up to 22V DC or RMS on its IN pins relative to GND without significant leakage or degradation. This makes it ideal for protecting 20–22V systems such as USB Power Delivery buses and industrial 24V nominal rails operating at reduced voltage levels. Exceeding 22V risks premature triggering or accelerated wear.
How does the TDS2211P achieve constant clamping voltage across varying surge currents?
The TDS2211P uses a precision-triggered shunt FET instead of a PN junction. When an overvoltage event exceeds ~25V, the internal trigger circuit activates the FET, which exhibits decreasing RDS(on) as current increases - resulting in a nearly fixed voltage drop (~27.5–28V) from 1A to 40A. This behavior is confirmed in the datasheet's clamping voltage vs. peak pulse current curves and differs fundamentally from TVS diodes whose VC rises linearly with IPP.
Can the TDS2211P be used to protect bidirectional data lines like USB 2.0 D+/D−?
No - the TDS2211P is a unidirectional, power-rail-oriented suppressor designed for single-ended 22V bus protection (e.g., VBUS, load switch inputs). Its 175pF junction capacitance and lack of symmetrical clamping make it unsuitable for high-speed data lines. For USB 2.0 or DP/DM protection, Semtech recommends low-capacitance devices like RClamp3371ZC (0.25pF), not the TDS2211P.
What is the recommended PCB layout for optimal surge performance of the TDS2211P?
Place the TDS2211P as close as possible to the protected connector. Connect all three IN pins (4, 5, 6) together with a short, wide trace to the protected line, and tie all three GND pins (1, 2, 3) directly to a solid ground plane using multiple vias. Avoid stubs or narrow traces - parasitic inductance degrades clamping response. No thermal pad is needed; energy is dissipated through the FET channel, not the die surface.
Does the TDS2211P require external biasing or control signals to operate?
No - the TDS2211P is a fully passive, self-contained protection device. It requires no external power, enable signals, or configuration. The internal trigger circuit and drive logic are powered solely by the transient event itself. Once installed with correct IN and GND connections, the TDS2211P automatically activates within nanoseconds when overvoltage is detected - no firmware, timing constraints, or external components are needed.
SCH20000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 20000 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 20 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 20000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
SCH20000 FAQ
1.How can I place an order for SCH20000 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCH20000 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 SCH20000 reliable?
The price and inventory of SCH20000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCH20000 is usually 5 days.
3.What payment methods are accepted for SCH20000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCH20000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCH20000?
SCH20000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCH20000 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 SCH20000?
For technical support, including SCH20000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCH20000 requirements.
6.How does Aetrix verify that SCH20000 is sourced from the original manufacturer or authorized distributors?
All SCH20000 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 SCH20000 meets industry standards.
7.What is the process for return or replacement of SCH20000?
All SCH20000 units undergo pre-shipment inspection (PSI). If there is an issue with SCH20000, 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 SCH20000 part is unused and in its original packaging.
Return procedure for SCH20000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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