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Semtech Corporation PFF2
- Part No.:
- PFF2
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
PFF2.pdf
- Description:
- DIODE GEN PURP 200V 1.25A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,153
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect single 22V I/O or power lines against high-energy EOS events, 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 - deployed in USB Type-C PD bus protection and industrial load switch input stages.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with 22V working voltage systems requiring robust EOS resilience beyond standard TVS limitations.
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 - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its dynamic resistance is 20mΩ (8/20μs), significantly lower than conventional TVS diodes.
Unlike traditional TVS devices whose clamping voltage rises linearly with IPP due to fixed RDYN, the TDS2211P maintains ~27.6V clamping from 24A to 40A and across –40°C to +125°C operating temperature - verified via combination-wave testing (1.2/50μs voltage + 8/20μs current, RS = 2Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage the device safely blocks 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 surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for USB Type-C VBUS line protection without signal integrity impact. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 ESD immunity for handheld and portable electronics interfaces. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive-grade and industrial ambient environments. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound. Exposed thermal pad not required - energy dissipated internally in FET channel.
| 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 - connects directly to VBUS or I/O line; all three pins are internally tied and must be shorted externally for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin inflation needed with conventional TVS diodes. |
| FET-based shunt protection | Replaces pn-junction TVS with low-RDS(on) surge FET - reduces thermal stress and improves reliability under repeated surges. |
| Temperature-stable clamping | Clamping remains ~27.6V from –40°C to +125°C - removes derating calculations required for TVS devices. |
| High-energy EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive burst noise in industrial control environments. |
| Compact DFN footprint | 1.6mm × 1.6mm area - saves >60% board space vs. comparable SOT-23 or SOIC TVS solutions while maintaining 1120W peak power rating. |
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 and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 27.6V clamping at 40A and 125°C - prevents overvoltage damage to sensitive PD controllers where conventional TVS would exceed 38V. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: Keeps clamping voltage below 28V across full temperature range - avoids latch-up or permanent failure of load switch during 1kV/42Ω surge events. |
| IoT Device Power Rail Protection | Notebook/Tablet DC Input Protection |
Use Scenario: Securing 12–22V DC input rails in battery-powered IoT gateways and sensor hubs subject to field ESD and coupling transients. IC Role / Device Role / Timing Role: Single-device solution for rail-level EOS suppression, replacing multi-component TVS+RC networks. Use Value: 175pF capacitance and 22V VRWM allow direct placement without filtering degradation - simplifies layout and BOM. |
Use Scenario: Protecting 19–20V adapter input circuits in ultrabooks and tablets against accidental AC line transients and connector hot-plug spikes. IC Role / Device Role / Timing Role: High-power transient diverter placed at main DC jack or USB-C port entry point. Use Value: 1120W peak power rating and 40A capability meet stringent OEM surge test requirements without thermal runaway risk. |
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, 35.1V clamping at 14.3A (8/20μs); higher RDYN (~0.5Ω) causes clamping rise with current. | Limited to lower-energy surges; unsuitable for 40A IEC 61000-4-5 compliance or high-temp operation where clamping drift exceeds safe margins. | Select only for cost-sensitive, low-surge-risk consumer applications where 28V clamping stability is not required. |
| SP1003-022 | Bi-directional TVS array; 22V VRWM, 36.8V clamping at 12.5A; 15pF typical capacitance but rated only to 20A (8/20μs). | Better for data-line protection (e.g., DP/DM), but insufficient peak current and clamping voltage for VBUS-level protection. | Use for auxiliary signal lines in same system; not a functional replacement for TDS2211P's VBUS shunt role. |
Compared with SMAJ22A and SP1003-022, the TDS2211P delivers superior surge robustness through FET-based constant-clamp behavior - enabling reliable 40A protection at 22V with minimal thermal derating, whereas alternatives require larger margins or supplemental components to achieve equivalent safety.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant 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 connectivity - with global manufacturing and quality certifications including ISO 9001 and IATF 16949.
The TDS series was developed to replace conventional TVS diodes in high-reliability 22V–36V power rail protection, addressing clamping instability and thermal derating limitations in industrial, computing, and USB-C infrastructure applications.
FAQ
What is the primary protection function of the TDS2211P?
The TDS2211P functions as a transient diverting suppressor that actively shunts high-energy EOS events - such as ESD, lightning surges, and EFT bursts - away from downstream circuitry using a precision-triggered surge-rated FET. Unlike passive TVS diodes, it maintains stable clamping voltage across current and temperature, making it ideal for protecting 22V VBUS lines in USB-C PD and industrial power systems. The TDS2211P achieves this through low dynamic resistance (20mΩ) and a controlled turn-on mechanism that minimizes voltage overshoot.
How does the TDS2211P differ from standard TVS diodes in clamping behavior?
The TDS2211P differs fundamentally by using a triggered FET instead of a pn-junction - resulting in nearly constant clamping voltage (27.5–28V) from 24A to 40A and across –40°C to +125°C, whereas standard TVS diodes exhibit linear clamping rise (VC = VBR + IPP × RDYN). This eliminates the need for oversized ratings to compensate for thermal or current-induced voltage drift. The TDS2211P's 20mΩ RDYN and FET-based architecture ensure predictable, repeatable protection performance where conventional TVS devices would exceed safe thresholds under real-world surge conditions.
What is the correct PCB layout practice for the TDS2211P to achieve full 40A rating?
To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be shorted together with a low-inductance trace directly to the protected line, and all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias - minimizing parasitic inductance that could elevate clamping voltage during fast transients. The device must be placed within 5mm of the connector, and no thermal pad is required since energy is dissipated in the FET channel. Layout deviations - such as omitting one GND pin or routing IN pins separately - reduce effective surge current handling and invalidate the 40A specification.
Can the TDS2211P be used for protecting USB-C SuperSpeed data lines?
No, the TDS2211P is not suitable for USB-C SuperSpeed (TX/RX) data line protection due to its 175pF junction capacitance - which would severely degrade signal integrity at 10Gbps. It is specifically designed for VBUS, CC, SBU, or power rail protection where capacitance is less critical. For SuperSpeed lines, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF). The TDS2211P should only be applied to high-voltage, low-bandwidth paths such as the 22V power bus, where its 27.6V clamping and 40A surge rating provide decisive protection advantage.
Is the TDS2211P compliant with RoHS and halogen-free standards?
Yes, the TDS2211P is fully RoHS/WEEE compliant and halogen-free, with lead-free terminal finish and UL 94V-0 rated molding compound. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and is qualified for reflow soldering per IPC/JEDEC J-STD-020. These compliance attributes are documented in Semtech's official datasheet Rev 2.5 and supported by material declarations available through authorized distributors. The TDS2211P is suitable for use in environmentally regulated markets including EU, China, and Japan without restriction.
PFF2 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):
- 200 V
- Current - Average Rectified (Io):
- 1.25A
- Voltage - Forward (Vf) (Max) @ If:
- 2.5 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 200 V
- Capacitance @ Vr, F:
- 30pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -65°C ~ 175°C
PFF2 FAQ
1.How can I place an order for PFF2 through Aetrix?
Please submit a Request for Quotation (RFQ) for PFF2 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 PFF2 reliable?
The price and inventory of PFF2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PFF2 is usually 5 days.
3.What payment methods are accepted for PFF2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PFF2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PFF2?
PFF2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PFF2 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 PFF2?
For technical support, including PFF2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PFF2 requirements.
6.How does Aetrix verify that PFF2 is sourced from the original manufacturer or authorized distributors?
All PFF2 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 PFF2 meets industry standards.
7.What is the process for return or replacement of PFF2?
All PFF2 units undergo pre-shipment inspection (PSI). If there is an issue with PFF2, 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 PFF2 part is unused and in its original packaging.
Return procedure for PFF2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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