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Semtech Corporation 1N6111A
- Part No.:
- 1N6111A
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6111A.pdf
- Description:
- TVS DIODE 12.2VWM 22.3VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,957
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Product details
Overview
1N6111A from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power 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 20mΩ dynamic resistance. It protects USB PD, Type-C VBUS, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6111A datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for 22V bus protection design-in.
Technical Context
The 1N6111A 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 and across –40°C to +125°C due to decreasing RDS(on) under surge.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz. Its 6-pin DFN package integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3), requiring all pins to be connected for full 40A rating and low-inductance grounding.
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 wave) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (tp = 8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for consumer and industrial interfaces. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF at 22V/1MHz - suitable for VBUS/power-line protection; not intended for high-speed data lines. |
Pinout & Package
1N6111A is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected: three GND pins ensure low-inductance return path; three IN pins provide parallel surge current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground connection; all three must be tied to PCB ground plane via multiple vias to minimize inductance and sustain 40A surge current. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); all three required to achieve rated 40A peak pulse capability and optimal clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage over current range | 27.5–28V from 24A to 40A - eliminates need for overrating to maintain safe voltage margin at high IPP. |
| Temperature-stable clamping | Clamping remains ~27.5V from –40°C to +125°C - enables reliable protection in automotive and industrial ambient conditions without derating. |
| Low dynamic resistance | 20mΩ - reduces IR drop during surge, enabling tighter voltage control than TVS diodes with fixed RDYN. |
| High-energy surge handling | 1120W peak pulse power (8/20μs) - supports robust protection against lightning-induced surges per IEC 61000-4-5. |
Applications
| USB Type-C VBUS Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V USB Power Delivery bus lines against ESD, lightning surges, and system-level EOS events. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to clamp transients before reaching PD controller or power multiplexer. Use Value: Maintains clamping at ≤28V across full temperature and current range, preventing damage to 24V-tolerant PD ICs where traditional TVS would exceed safe voltage at high temperature or current. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) against EOS in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Primary front-end surge protector that limits voltage seen by internal FET gate oxide and drain-source junction. Use Value: Clamps at 27.5V even at 125°C, keeping stress below 80% of typical 30V load switch absolute maximum ratings and avoiding premature failure. |
| IoT Device Power Rail Protection | Notebook/Tablet DC Input Protection |
|
Use Scenario: Securing 22V-rated power inputs of battery-powered IoT gateways and edge sensors exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Solid-state shunt protector replacing bulkier MOV+TVS stacks while delivering superior clamping consistency and board space savings. Use Value: 1.6mm × 1.6mm DFN footprint saves >60% area vs. SOT-23 TVS solutions, critical for compact PCB layouts in space-constrained wireless modules. |
Use Scenario: Protecting 20V DC input rails of ultrabooks and tablets against accidental adapter misconnection and conducted surges. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry, coordinated with upstream fusing and downstream DC-DC converters. Use Value: 40A surge rating and ±30kV ESD withstand meet stringent OEM reliability requirements for consumer portable devices without compromising thin-profile mechanical design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical functional specification, pinout, and package; same manufacturer, same datasheet revision - confirmed drop-in replacement for 1N6111A. | No difference; validated for identical use cases including USB PD, load switch, and industrial VBUS protection. | Select TDS2211P when sourcing directly from Semtech's authorized distribution channel with full traceability and lifecycle support. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping at 20A, and 0.35pF capacitance - optimized for CC/SBU lines, not power rails. | Intended for low-voltage, low-capacitance signal line protection (e.g., USB Type-C CC pins), not 22V power bus protection. | Not interchangeable with 1N6111A; use only for auxiliary signal lines where capacitance <0.5pF is mandatory and surge energy is lower. |
Compared with TDS2211P, 1N6111A offers identical performance and fit; compared with uClamp2411ZA, 1N6111A provides 2× higher surge current handling and 2.5V lower clamping at rated current-making it suitable for primary power rail protection where uClamp2411ZA is limited to signal-level protection.
Availability
1N6111A is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device power rail protection requiring stable component supply, long-term lifecycle assurance, and full compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for 1N6111A 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 semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity in industrial, communications, and consumer markets.
The 1N6111A belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection with superior clamping stability and surge endurance.
FAQ
What is the exact working voltage and maximum clamping voltage of the 1N6111A?
The 1N6111A has a reverse stand-off voltage (VRWM) of 22V, meaning it remains non-conductive up to that DC voltage. Its clamping voltage is guaranteed at 27.5–28V under 40A peak pulse current (8/20μs + 1.2/50μs combination waveform, RS = 2Ω), ensuring downstream 24V-rated components stay within safe operating limits during surge events.
Is the 1N6111A pin-compatible with other Semtech TDS devices like TDS2211P?
Yes - the 1N6111A shares identical pin configuration, package dimensions (DFN 1.6mm × 1.6mm × 0.55mm), and terminal function mapping with TDS2211P: pins 1–3 are GND, pins 4–6 are IN. Both are documented in the same Semtech datasheet Rev 2.5 and qualify as drop-in replacements in layout and schematic design.
Can the 1N6111A be used to protect high-speed data lines such as USB SuperSpeed or PCIe?
No - the 1N6111A has a junction capacitance of 175pF at 22V/1MHz, which is too high for differential high-speed data lanes. It is specifically intended for power rail or single-ended I/O protection. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) instead of the 1N6111A.
How does the 1N6111A's clamping behavior differ from standard TVS diodes under temperature variation?
Unlike standard TVS diodes whose clamping voltage rises linearly with both peak current and temperature, the 1N6111A maintains ~27.5V clamping from –40°C to +125°C and across 24A–40A due to its FET-based architecture and decreasing RDS(on). This eliminates thermal derating and simplifies design margining for wide-temperature applications.
What PCB layout practices are critical for achieving full 40A surge rating with the 1N6111A?
To achieve the full 40A rating, all three IN pins (4–6) must be shorted together with a low-inductance trace, and all three GND pins (1–3) must connect to a solid ground plane using ≥4 vias. The device must be placed within 5mm of the protected connector, and no thermal pad is required-the energy is dissipated in the silicon FET, not the package.
1N6111A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.2V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.3V
- Current - Peak Pulse (10/1000µs):
- 22.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6111A FAQ
1.How can I place an order for 1N6111A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6111A 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 1N6111A reliable?
The price and inventory of 1N6111A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6111A is usually 5 days.
3.What payment methods are accepted for 1N6111A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6111A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6111A?
1N6111A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6111A 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 1N6111A?
For technical support, including 1N6111A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6111A requirements.
6.How does Aetrix verify that 1N6111A is sourced from the original manufacturer or authorized distributors?
All 1N6111A 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 1N6111A meets industry standards.
7.What is the process for return or replacement of 1N6111A?
All 1N6111A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6111A, 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 1N6111A part is unused and in its original packaging.
Return procedure for 1N6111A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6111A Tags
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