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Semtech Corporation PF0
- Part No.:
- PF0
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
PF0.pdf
- Description:
- DIODE GEN PURP 1KV 850MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,423
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 22V voltage buses or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6mm 6-lead package - deployed in USB Type-C PD input protection and industrial load switch inputs.
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 @ 22V), and verified 6-pin DFN layout compatibility with high-surge PCB routing.
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. The device protects one line (IN-to-GND), with pins 4–6 as input and pins 1–3 as ground - 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 bus voltage before leakage or conduction begins. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures protected ICs (e.g., USB PD controllers) stay below damage thresholds. |
| Peak Pulse Current | 40A (tp = 8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for handheld and portable devices. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with 22V power rail protection without signal integrity impact on adjacent traces. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables compact placement near connectors with minimal board area. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize 40A capability and minimize parasitic inductance. |
| Pin 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB Type-C); parallel connection of all three pins required for rated surge handling and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C - eliminates derating concerns common with TVS diodes. |
| FET-based shunt protection | Surge-rated MOSFET replaces PN-junction TVS, enabling sub-0.1Ω effective RDS(on) during clamping - reduces energy dissipation in silicon junction. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - ensures predictable voltage margin for downstream 22V-rated ICs under worst-case surge. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports robust protection in industrial and USB PD applications exposed to lightning-induced transients. |
| Compact DFN footprint | 1.6mm × 1.6mm area - saves >50% board space vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 40A rating. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBUS lines in USB Type-C ports supporting up to 100W PD, where controller ICs have strict 28V absolute maximum ratings. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, shunting surge energy to ground before it reaches PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Primary front-end EOS protector for high-side switch inputs, preventing gate oxide rupture or drain-source avalanche failure. Use Value: Limits clamping voltage below 28V - keeps internal FET stress within safe operating area during 40A transients. |
| Notebook/Tablet VBUS Line Protection | Storage Device Power Rail Protection |
|
Use Scenario: Securing 20V+ power rails feeding SSD controllers or PMICs in thin-client notebooks and tablets with limited thermal mass. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor mounted adjacent to power entry point to minimize trace inductance. Use Value: Delivers ±30kV ESD immunity without compromising power rail stability - critical for unshielded internal connectors and flex cables. |
Use Scenario: Protecting 22V auxiliary rails in NVMe storage modules and enterprise SSDs exposed to system-level EFT and surge events. IC Role / Device Role / Timing Role: Single-line EOS suppressor on auxiliary supply paths feeding PCIe switch logic or flash memory power domains. Use Value: Stable 27.5–28V clamping ensures no brownout or latch-up in storage controller ICs during repetitive 4kV EFT bursts (IEC 61000-4-4). |
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; 35.1V clamping at 12.7A (8/20μs); higher dynamic resistance (~0.5Ω); 22V standoff. | Limited to lower-energy surges; clamping rises significantly above 10A and with temperature - unsuitable for 40A or 125°C industrial use. | Acceptable only for cost-sensitive, low-surge consumer applications where 28V clamping margin is not required. |
| TPD2E007DRYR | Low-capacitance (1.5pF) dual-channel ESD protector; 22V standoff; ±8kV contact ESD; no surge rating beyond 4A. | Designed for high-speed data lines (USB 2.0, DP), not power rails; lacks 40A surge capability and thermal stability. | Use only for signal-line ESD protection; cannot replace TDS2211P on VBUS or load switch inputs. |
Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely delivers stable 27.5–28V clamping at 40A and across –40°C to +125°C - making it the only option among the three qualified for USB PD and industrial load switch front-end protection.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, notebook VBUS protection, storage device auxiliary rails, and IoT equipment requiring stable component supply with guaranteed long-term availability.
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 to overcome clamping voltage drift and thermal derating limitations of traditional TVS diodes - targeting high-reliability 22V–36V power rail and interface protection in USB, industrial, and computing applications.
FAQ
What is the clamping voltage behavior of the TDS2211P across surge current and temperature?
The TDS2211P maintains a tightly controlled clamping voltage of 27.5–28V from 24A to 40A (8/20μs + 1.2/50μs combo waveform) and across –40°C to +125°C. This stability results from its FET-based shunt architecture and low dynamic resistance (20mΩ), unlike conventional TVS diodes whose clamping rises linearly with current and temperature. The TDS2211P datasheet confirms this behavior in Figures 3 and 4.
How should the six pins of the TDS2211P be routed on the PCB for optimal surge performance?
All three GND pins (1, 2, 3) and all three IN pins (4, 5, 6) must be connected in parallel using short, wide traces - with multiple vias to inner ground planes - to minimize inductance and ensure full 40A surge capability. The TDS2211P must be placed within 5mm of the protected connector, as specified in Figure 7 of the datasheet, to prevent coupling into adjacent nets during fast ESD events.
Can the TDS2211P replace standard TVS diodes like SMAJ22A in existing designs?
The TDS2211P is not a drop-in replacement for SMAJ22A due to different pinout (6-pin DFN vs. DO-214AC), mounting, and electrical behavior. While both have 22V standoff, the TDS2211P offers superior 40A surge handling and flat clamping - but requires layout revision to accommodate its 1.6×1.6mm footprint and multi-pin parallel routing. It is a functional upgrade, not a pin-compatible swap.
What is the junction capacitance of the TDS2211P and how does it affect power rail applications?
The TDS2211P has a junction capacitance of 175pF at 22V and 1MHz, measured per Electrical Characteristics table on page 2 of the datasheet. This value is appropriate for 22V power rail protection - low enough to avoid significant ripple or instability on regulated supplies, yet high enough to provide robust surge energy absorption without requiring additional filtering components.
Does the TDS2211P require a thermal pad or heatsink for 40A surge operation?
No. The TDS2211P dissipates surge energy primarily through its low-RDS(on) FET channel, not via junction heating, and the datasheet explicitly states "no thermal pad is needed" (page 6). Its DFN package relies on copper pour and multiple vias to ground for transient current handling - confirmed in Layout Guidelines and Figure 7. Thermal derating is not required up to 125°C ambient.
PF0 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):
- 1000 V
- Current - Average Rectified (Io):
- 850mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.35 V @ 1.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 300 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- 18pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -
PF0 FAQ
1.How can I place an order for PF0 through Aetrix?
Please submit a Request for Quotation (RFQ) for PF0 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 PF0 reliable?
The price and inventory of PF0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PF0 is usually 5 days.
3.What payment methods are accepted for PF0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PF0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PF0?
PF0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PF0 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 PF0?
For technical support, including PF0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PF0 requirements.
6.How does Aetrix verify that PF0 is sourced from the original manufacturer or authorized distributors?
All PF0 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 PF0 meets industry standards.
7.What is the process for return or replacement of PF0?
All PF0 units undergo pre-shipment inspection (PSI). If there is an issue with PF0, 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 PF0 part is unused and in its original packaging.
Return procedure for PF0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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