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Semtech Corporation F50A
- Part No.:
- F50A
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
F50A.pdf
- Description:
- DIODE GEN PURP 5KV 100MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,777
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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, and stable 27.5–28V clamping voltage across temperature and current range-used in USB Type-C PD bus protection and load switch input safeguarding.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and industrial load-switch protection use cases, and two validated alternative surge protectors with documented functional trade-offs.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly turns on the shunt path. Its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A IPP due to the FET's ultra-low dynamic resistance (20mΩ).
Unlike conventional TVS diodes, the TDS2211P maintains stable clamping across –40°C to +125°C operating temperature and exhibits minimal voltage rise under fast-rising transients-enabling reliable protection in thermally demanding USB PD and industrial equipment environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage the device safely withstands without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| 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 standard USB interface ESD robustness requirements. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during high di/dt transients. |
| Reverse Leakage | 600nA max at 22V - ensures negligible standby power loss and no measurable loading on protected 22V bus. |
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 PD); parallel connection of all three pins ensures full 40A rating and uniform current distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A IPP-eliminates need for derating at high temperatures or currents. |
| FET-based shunt topology | Replaces PN-junction TVS with <0.1Ω RDS(on), reducing thermal stress and enabling higher energy absorption per unit area. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs)-minimizes voltage overshoot during fast-rising lightning surges. |
| High-temperature stability | Clamping holds at 27.5–28V from –40°C to +125°C-avoids thermal runaway risk in enclosed industrial enclosures. |
| DFN-6 footprint | 1.6mm × 1.6mm area saves >60% board space vs. comparable SO-8 TVS solutions-critical for compact USB-C connectors. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp surges before reaching PD controller and power switches. Use Value: Maintains 27.5–28V clamping across full 40A/125°C range-prevents false triggering or latch-up in TI TPS6598x or STUSB4500 PD controllers. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., ON Semi NIS5132, Diodes AP22653) in remote meters and robotics. IC Role / Device Role / Timing Role: Primary surge shunt element absorbing 8/20μs transients before they reach the internal MOSFET gate oxide or drain-source junction. Use Value: Limits clamping voltage to ≤28V-well below typical 30V absolute max ratings of integrated load switch FETs, preventing permanent damage. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways subjected to EFT bursts (±4kV IEC 61000-4-4) and cable discharge events. IC Role / Device Role / Timing Role: Fast-acting EOS protector with sub-ns trigger latency, diverting energy away from PMICs and microcontroller power domains. Use Value: 175pF capacitance avoids resonance with typical 10–100μF bulk capacitors-no need for additional series impedance or damping networks. |
Use Scenario: Shielding 22V supercapacitor or LiFePO₄ backup supplies in enterprise SSDs and NAS enclosures from AC-line coupled surges. IC Role / Device Role / Timing Role: High-energy transient clamp placed between backup source and system rail, rated for repeated 40A surges without parameter drift. Use Value: 1120W peak pulse power rating supports multiple IEC 61000-4-5 surges without degradation-ensures long-term reliability in 24/7 storage systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Semtech TDS2411P | 24V working voltage, 28V clamping, same DFN-6 package and FET architecture. | Better suited for 24V systems (e.g., PoE++ PSE), less margin for 22V rails near upper limit. | Select when system nominal voltage is ≥23.5V; avoid if VRWM margin must exceed 0.5V. |
| Littelfuse SP3022-01ETG | 22V working voltage, 33V clamping (at 24A), 12pF capacitance, SOD-323 package. | Lower capacitance ideal for data lines, but clamping rises to 36V at 40A and degrades above 85°C. | Prefer for low-capacitance signal-line protection; not recommended for 40A/125°C power rail duty. |
Compared with TDS2211P, TDS2411P offers identical architecture with higher VRWM but reduced safety margin on 22V rails, while SP3022-01ETG trades clamping stability and surge rating for ultra-low capacitance-making TDS2211P the optimal choice for high-current, thermally demanding 22V power protection.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch inputs, and 22V IoT power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
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, power management, and transient protection.
The TDS2211P belongs to Semtech's Transient Diverting Suppressor family-engineered to replace traditional TVS diodes in high-reliability 22V power and interface protection where stable clamping and thermal resilience are critical.
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 block up to 22V DC without significant leakage or conduction. This makes it suitable for 20–22V systems like USB PD 3.0 VBUS rails and industrial 24V nominal supplies operating at reduced voltage levels. Exceeding 22V risks premature conduction and accelerated wear.
How does the TDS2211P achieve stable clamping voltage across temperature?
The TDS2211P achieves stable clamping by using a precision-triggered FET shunt 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-not the FET's VGS or thermal characteristics. As confirmed in the datasheet, clamping remains 27.5–28V from –40°C to +125°C.
Can the TDS2211P be used on high-speed data lines like USB SS or PCIe?
No-the TDS2211P is not intended for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on SuperSpeed (5+ Gbps) or PCIe lanes. It is specifically designed for 22V power rails and low-bandwidth control lines. For USB SS or DP/DM protection, Semtech recommends RClamp3371ZC (0.25pF) alongside the TDS2211P in hybrid protection schemes.
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) via a single 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 splits-this minimizes inductance and ensures full 40A current sharing across parallel paths, as validated in the datasheet's layout guidelines.
Does the TDS2211P require external biasing or control signals to operate?
No-the TDS2211P is a fully passive, self-contained device. It contains an integrated trigger circuit and shunt FET within the monolithic die; no external voltage, enable signal, or configuration is needed. It activates automatically when transient voltage exceeds its internal breakdown threshold (~25V), making it drop-in compatible with existing TVS footprints requiring only layout optimization.
F50A 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):
- 5000 V
- Current - Average Rectified (Io):
- 100mA
- Voltage - Forward (Vf) (Max) @ If:
- 8 V @ 50 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 300 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5000 V
- Capacitance @ Vr, F:
- 2pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -65°C ~ 175°C
F50A FAQ
1.How can I place an order for F50A through Aetrix?
Please submit a Request for Quotation (RFQ) for F50A 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 F50A reliable?
The price and inventory of F50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for F50A is usually 5 days.
3.What payment methods are accepted for F50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for F50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for F50A?
F50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your F50A 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 F50A?
For technical support, including F50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your F50A requirements.
6.How does Aetrix verify that F50A is sourced from the original manufacturer or authorized distributors?
All F50A 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 F50A meets industry standards.
7.What is the process for return or replacement of F50A?
All F50A units undergo pre-shipment inspection (PSI). If there is an issue with F50A, 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 F50A part is unused and in its original packaging.
Return procedure for F50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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