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Semtech Corporation 1N3611
- Part No.:
- 1N3611
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N3611.pdf
- Description:
- DIODE GEN PURP 200V 1A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,468
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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. It delivers ±30kV IEC 61000-4-2 contact/air ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB Type-C PD input 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 for flat VC vs. IPP behavior, DFN-6 footprint compatibility, and suitability for high-voltage bus protection in industrial and portable power delivery systems.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage beyond ~25V breakdown. Unlike conventional TVS diodes, it achieves near-constant clamping voltage due to decreasing RDS(on) under surge, not fixed RDYN.
It operates across –40°C to +125°C with stable 27.5–28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), and maintains ≤600nA reverse leakage at 22V. Its 175pF capacitance at 22V/1MHz supports moderate-speed data line integration without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs/1.2/50μs combo wave) - 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 surge immunity for industrial equipment and USB PD inputs. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for handheld and docking interfaces. |
| Dynamic Resistance | 20mΩ - enables flat clamping response across full 1–40A surge range, unlike TVS diodes whose VC rises linearly with IPP. |
| Junction Capacitance | 175pF at 22V/1MHz - suitable for <100Mbps bus lines (e.g., USB 2.0, SMBus, PMBus); not for USB 3.x SS lanes. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), RoHS-compliant, Pb-free, UL 94V-0 molding compound. Exposed thermal pad not required; all six terminals are functional I/O or ground connections.
| 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 handling and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB-C); parallel connection of all three pins reduces trace inductance and distributes surge current evenly. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage remains stable (27.5–28V) from 1A to 40A and –40°C to +125°C - eliminates derating uncertainty in thermal design. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction dissipation - enables higher IPP in smaller die area than TVS. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - directly enables flat VC vs. IPP curve critical for protecting tight-margin 24V logic rails. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports robust protection for 22V industrial buses exposed to lightning-induced surges. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed at connector entry point, clamping transients before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 24V-rated PD controllers where traditional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on the load switch's internal FET during 1kV/42Ω surge events. Use Value: Prevents latch-up or gate oxide rupture in load switches by holding clamping voltage well below their absolute max VIN rating (typically 28–30V). |
| Notebook/Tablet VBUS Rail Protection | Storage Device 22V Power Bus Protection |
Use Scenario: Securing main 20V battery-charging rail in ultrabooks and tablets against ESD from hot-plug connectors and conducted surges. IC Role / Device Role / Timing Role: Low-capacitance, high-IPP protector co-located with USB-C port to minimize PCB trace inductance and coupling. Use Value: 175pF capacitance avoids signal distortion on shared VBUS lines while delivering 40A surge capability - enabling single-device coverage without RC filtering trade-offs. |
Use Scenario: Shielding 22V auxiliary power rails in NVMe SSD enclosures and enterprise storage backplanes from board-level EOS. IC Role / Device Role / Timing Role: Standalone transient suppressor on 22V supply net feeding PMICs, fan controllers, and LED drivers. Use Value: 600nA max leakage at 22V ensures negligible standby current impact - critical for battery-backed storage subsystems requiring multi-year shelf life. |
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; 35.5V clamping at 24A (8/20μs), 1.5Ω RDYN, 100pF capacitance. | Higher clamping voltage increases risk of 24V IC damage at elevated temperature; lower capacitance suits faster data lines. | Choose SMAJ22A only if cost sensitivity outweighs clamping stability needs and board space allows larger SMC package. |
| SP1006-022 | Bi-directional TVS array; 30V clamping at 20A (8/20μs), 1.2Ω RDYN, 120pF per line, SOT-23-3 package. | Limited to 20A IPP and lacks constant-clamp behavior; better suited for dual-line protection (e.g., DP/DM) than single high-current VBUS. | Use SP1006-022 for compact dual-rail protection where 20A IPP suffices and flat VC is not required. |
Compared with SMAJ22A and SP1006-022, the TDS2211P provides superior clamping stability across temperature and current - critical for protecting 24V-rated PD controllers and load switches where voltage margin is tight and thermal derating is impractical.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch inputs, and notebook VBUS rail protection requiring stable component supply, long-term lifecycle support, and verified surge performance.
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 family was developed to replace conventional TVS diodes in high-reliability 20–30V power rail protection, addressing clamping voltage drift and thermal derating limitations inherent in PN-junction devices.
FAQ
What is the primary protection function of the TDS2211P?
The TDS2211P functions as a transient diverting suppressor that shunts high-energy EOS, ESD, and surge currents away from sensitive downstream components. It uses a precision-triggered FET to achieve near-constant clamping voltage - unlike standard TVS diodes - making it ideal for protecting 22V power rails such as USB-C VBUS. The TDS2211P activates when transient voltage exceeds ~25V, then clamps tightly at 27.5–28V even at 40A and 125°C.
How does the TDS2211P differ from a standard TVS diode in clamping behavior?
The TDS2211P differs fundamentally: it employs a surge-rated FET switched by a trigger circuit, yielding ~20mΩ dynamic resistance and flat clamping voltage (27.5–28V) from 1A to 40A. Standard TVS diodes rely on PN-junction avalanche with fixed RDYN (~1–2Ω), causing clamping voltage to rise linearly with current (e.g., VC = VBR + IPP × RDYN). This makes the TDS2211P far more predictable for protecting 24V-rated ICs under real-world surge and thermal conditions.
Can the TDS2211P be used on high-speed data lines like USB 3.2 SuperSpeed?
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 above ~1Gbps. It is intended for DC power rails (e.g., VBUS, load switch inputs) and moderate-speed control lines (<100Mbps). For SuperSpeed lanes, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF), as documented in the TDS2211P application notes.
What is the recommended PCB layout for optimal performance of the TDS2211P?
Place the TDS2211P as close as possible to the protected connector (e.g., USB-C receptacle) to minimize trace inductance. 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 thermal pads - energy is dissipated in the FET channel, not the die surface. Follow Semtech's land pattern (1.6×1.6mm DFN) precisely to ensure mechanical reliability and solder joint integrity.
Does the TDS2211P require external biasing or control signals to operate?
No, the TDS2211P is fully passive and requires no external power, bias, or control signals. Its internal trigger circuit self-activates when transient voltage exceeds the ~25V breakdown threshold, automatically turning on the shunt FET. This autonomous operation makes it drop-in compatible with existing TVS placements - simply replace the TVS diode with the TDS2211P in the same location, ensuring correct pin mapping (IN to protected line, GND to ground plane).
1N3611 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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 500 nA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N3611 FAQ
1.How can I place an order for 1N3611 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3611 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 1N3611 reliable?
The price and inventory of 1N3611 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3611 is usually 5 days.
3.What payment methods are accepted for 1N3611?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3611 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3611?
1N3611 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3611 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 1N3611?
For technical support, including 1N3611 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3611 requirements.
6.How does Aetrix verify that 1N3611 is sourced from the original manufacturer or authorized distributors?
All 1N3611 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 1N3611 meets industry standards.
7.What is the process for return or replacement of 1N3611?
All 1N3611 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3611, 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 1N3611 part is unused and in its original packaging.
Return procedure for 1N3611:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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