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Semtech Corporation S15F
- Part No.:
- S15F
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
S15F.pdf
- Description:
- DIODE GEN PURP 1.5KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,765
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6mm 6-lead package - deployed in USB Type-C PD bus protection.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (<20mΩ), junction capacitance (175pF), and validated use in load-switch input protection and industrial surge environments.
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 (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable clamping performance, supported by <20mΩ dynamic resistance and 175pF junction capacitance at 22V/1MHz. The device protects one line (IN-to-GND), with pins 4–6 as input terminals and pins 1–3 as ground terminals - requiring all six pins to be connected for full 40A rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements with 2Ω source impedance. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements for external connectors. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with medium-speed interfaces (e.g., USB 2.0, CC/SBU, load switch control lines) without signal integrity degradation. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current sharing and minimize parasitic inductance. |
| Pins 4, 5, 6 | IN | Input terminal for protected line (e.g., VBUS in USB-C); parallel connection provides low-inductance path to GND during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for derating at high temperature or high current. |
| FET-based shunt topology | Replaces PN-junction TVS with low-RDS(on) MOSFET - dissipates energy in channel rather than junction, improving thermal stability. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge events per IEC 61000-4-5 without degradation. |
| Low-tempco clamping | Clamping remains stable from –40°C to +125°C - avoids design margin inflation required for conventional TVS devices. |
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 system-level EOS events in portable and docking stations. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to clamp overvoltage before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C and 24–40A, preventing false OVP trips and enabling smaller, more reliable PD designs. |
Use Scenario: Safeguarding enable, input, or current-limit pins of industrial-grade load switches (e.g., HS2950P) exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary front-end protector for e-fuse and smart power switch ICs in remote meters, robotics, and factory automation. Use Value: Limits clamping voltage below internal FET drain-source breakdown (typically <30V), avoiding permanent gate oxide damage during 1kV/42Ω surges. |
| IoT Device Port Protection | Storage Interface Power Line Protection |
Use Scenario: Securing 22V-rated auxiliary power inputs on battery-backed IoT edge nodes subject to uncontrolled hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Single-device solution for EOS suppression on always-on supply rails where board space and thermal management are constrained. Use Value: 1.6×1.6mm footprint saves >60% area vs. discrete TVS+RC solutions while delivering higher surge robustness and lower leakage (≤600nA). |
Use Scenario: Protecting 22V auxiliary power rails in NVMe SSD enclosures and enterprise storage backplanes against insertion surges and backplane coupling. IC Role / Device Role / Timing Role: High-reliability transient suppressor on 22V VCC_AUX lines feeding PMICs and interface buffers in high-density storage modules. Use Value: Stable 27.5V clamping prevents latch-up in downstream LDOs and ensures uninterrupted operation during multi-event surge testing (IEC 61000-4-5, 5×). |
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 clamping stability over current/temp. | Higher clamping voltage increases risk of PD controller damage at elevated temperature or full surge current. | Use only where cost is primary constraint and 35.5V clamping is acceptable for downstream 24V-rated ICs. |
| TPD2E001DRYR | Low-capacitance (1.5pF) dual-channel TVS for data lines; 22V VRWM, but rated only for 4A IPP - insufficient for power-line surge. | Designed for USB 2.0/DP/DM signal lines, not power/bus protection; lacks 40A surge capability and thermal robustness. | Complementary to TDS2211P in full USB-C protection schemes - use TPD2E001DRYR for SS lanes, TDS2211P for VBUS. |
Compared with SMAJ22A and TPD2E001DRYR, the TDS2211P uniquely delivers 40A surge handling with flat 27.5V clamping across temperature - making it the only option qualified for 22V power rail protection in USB PD and industrial load-switch applications without design margin compromise.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load-switch protection, and IoT port hardening 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 signal integrity.
The TDS series was developed to replace conventional TVS diodes in high-reliability power-line protection, targeting applications where clamping voltage stability over temperature and current is critical - such as USB PD, industrial power supplies, and ruggedized IoT endpoints.
FAQ
What is the primary protection function of the TDS2211P?
The TDS2211P functions as a transient diverting suppressor that shunts high-energy EOS events - including ESD, lightning surges, and cable discharge - from 22V-rated power or I/O lines to ground. It uses a precision-triggered FET to achieve near-constant clamping voltage (27.5–28V) across its full 40A surge rating and operating temperature range, distinguishing it from conventional TVS diodes.
Can the TDS2211P be used for USB 3.2 SuperSpeed data line protection?
No, the TDS2211P is not suitable for USB 3.2 SuperSpeed differential pairs due to its 175pF junction capacitance, which would severely degrade signal integrity at 10Gbps. It is intended for VBUS, CC, SBU, and load-switch control lines. For SuperSpeed lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), as specified in the TDS2211P application note.
Why does the TDS2211P require all six pins to be connected?
All six pins of the TDS2211P must be connected - pins 1–3 to solid ground and pins 4–6 to the protected line - to achieve its rated 40A peak pulse current and minimize parasitic inductance. Splitting connections or omitting any pin degrades surge current sharing, raises clamping voltage, and risks thermal failure during high-energy transients, as confirmed in the layout guidelines and absolute maximum ratings section of the datasheet.
How does the TDS2211P compare to standard TVS diodes in temperature performance?
Unlike standard TVS diodes whose clamping voltage rises with both peak current and temperature, the TDS2211P maintains 27.5–28V clamping from –40°C to +125°C and across 24–40A. This stability results from its FET-based shunt architecture and low dynamic resistance (<20mΩ), eliminating the need for derating at high ambient temperatures - a key advantage in enclosed industrial or automotive environments.
Is the TDS2211P RoHS and REACH compliant?
Yes, the TDS2211P is Pb-free, halogen-free, and compliant with RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU. Its molding compound meets UL 94V-0 flammability rating, and lead finish is fully lead-free. Compliance documentation, including test reports and declarations, is available through Semtech's official product page and authorized distributors.
S15F 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):
- 1500 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 5 V @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 300 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1500 V
- Capacitance @ Vr, F:
- 4pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -65°C ~ 175°C
S15F FAQ
1.How can I place an order for S15F through Aetrix?
Please submit a Request for Quotation (RFQ) for S15F 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 S15F reliable?
The price and inventory of S15F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S15F is usually 5 days.
3.What payment methods are accepted for S15F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S15F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S15F?
S15F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S15F 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 S15F?
For technical support, including S15F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S15F requirements.
6.How does Aetrix verify that S15F is sourced from the original manufacturer or authorized distributors?
All S15F 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 S15F meets industry standards.
7.What is the process for return or replacement of S15F?
All S15F units undergo pre-shipment inspection (PSI). If there is an issue with S15F, 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 S15F part is unused and in its original packaging.
Return procedure for S15F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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